shithub: psxe

Download patch

ref: 40865eafb547de50628e52a6a77dce9f96037654
parent: 578bd2f24e8deb97f069d51ac908d67d0aef5767
author: Jean-André Santoni <jean.andre.santoni@gmail.com>
date: Sun Mar 8 18:52:04 EDT 2026

Remove frontend

--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@
 bios/
 roms/
 snap/
+log
 *.BIN
 *.bin
 *.dll
--- a/frontend/argparse.c
+++ /dev/null
@@ -1,394 +1,0 @@
-/**
- * Copyright (C) 2012-2015 Yecheng Fu <cofyc.jackson at gmail dot com>
- * All rights reserved.
- *
- * Use of this source code is governed by a MIT-style license that can be found
- * in the LICENSE file.
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-#include <errno.h>
-#include "argparse.h"
-
-#define OPT_UNSET 1
-#define OPT_LONG  (1 << 1)
-
-static const char *
-prefix_skip(const char *str, const char *prefix)
-{
-    size_t len = strlen(prefix);
-    return strncmp(str, prefix, len) ? NULL : str + len;
-}
-
-static int
-prefix_cmp(const char *str, const char *prefix)
-{
-    for (;; str++, prefix++)
-        if (!*prefix) {
-            return 0;
-        } else if (*str != *prefix) {
-            return (unsigned char)*prefix - (unsigned char)*str;
-        }
-}
-
-static void
-argparse_error(struct argparse *self, const struct argparse_option *opt,
-               const char *reason, int flags)
-{
-    (void)self;
-    if (flags & OPT_LONG) {
-        fprintf(stderr, "error: option `--%s` %s\n", opt->long_name, reason);
-    } else {
-        fprintf(stderr, "error: option `-%c` %s\n", opt->short_name, reason);
-    }
-    exit(EXIT_FAILURE);
-}
-
-static int
-argparse_getvalue(struct argparse *self, const struct argparse_option *opt,
-                  int flags)
-{
-    const char *s = NULL;
-    if (!opt->value)
-        goto skipped;
-    switch (opt->type) {
-    case ARGPARSE_OPT_BOOLEAN:
-        if (flags & OPT_UNSET) {
-            *(int *)opt->value = *(int *)opt->value - 1;
-        } else {
-            *(int *)opt->value = *(int *)opt->value + 1;
-        }
-        if (*(int *)opt->value < 0) {
-            *(int *)opt->value = 0;
-        }
-        break;
-    case ARGPARSE_OPT_BIT:
-        if (flags & OPT_UNSET) {
-            *(int *)opt->value &= ~opt->data;
-        } else {
-            *(int *)opt->value |= opt->data;
-        }
-        break;
-    case ARGPARSE_OPT_STRING:
-        if (self->optvalue) {
-            *(const char **)opt->value = self->optvalue;
-            self->optvalue             = NULL;
-        } else if (self->argc > 1) {
-            self->argc--;
-            *(const char **)opt->value = *++self->argv;
-        } else {
-            argparse_error(self, opt, "requires a value", flags);
-        }
-        break;
-    case ARGPARSE_OPT_INTEGER:
-        errno = 0;
-        if (self->optvalue) {
-            *(int *)opt->value = strtol(self->optvalue, (char **)&s, 0);
-            self->optvalue     = NULL;
-        } else if (self->argc > 1) {
-            self->argc--;
-            *(int *)opt->value = strtol(*++self->argv, (char **)&s, 0);
-        } else {
-            argparse_error(self, opt, "requires a value", flags);
-        }
-        if (errno == ERANGE)
-            argparse_error(self, opt, "numerical result out of range", flags);
-        if (s[0] != '\0') // no digits or contains invalid characters
-            argparse_error(self, opt, "expects an integer value", flags);
-        break;
-    case ARGPARSE_OPT_FLOAT:
-        errno = 0;
-        if (self->optvalue) {
-            *(float *)opt->value = strtof(self->optvalue, (char **)&s);
-            self->optvalue       = NULL;
-        } else if (self->argc > 1) {
-            self->argc--;
-            *(float *)opt->value = strtof(*++self->argv, (char **)&s);
-        } else {
-            argparse_error(self, opt, "requires a value", flags);
-        }
-        if (errno == ERANGE)
-            argparse_error(self, opt, "numerical result out of range", flags);
-        if (s[0] != '\0') // no digits or contains invalid characters
-            argparse_error(self, opt, "expects a numerical value", flags);
-        break;
-    default:
-        assert(0);
-    }
-
-skipped:
-    if (opt->callback) {
-        return opt->callback(self, opt);
-    }
-    return 0;
-}
-
-static void
-argparse_options_check(const struct argparse_option *options)
-{
-    for (; options->type != ARGPARSE_OPT_END; options++) {
-        switch (options->type) {
-            case ARGPARSE_OPT_END:
-            case ARGPARSE_OPT_BOOLEAN:
-            case ARGPARSE_OPT_BIT:
-            case ARGPARSE_OPT_INTEGER:
-            case ARGPARSE_OPT_FLOAT:
-            case ARGPARSE_OPT_STRING:
-            case ARGPARSE_OPT_GROUP:
-                continue;
-            default:
-                fprintf(stderr, "wrong option type: %d", options->type);
-                break;
-        }
-    }
-}
-
-static int
-argparse_short_opt(struct argparse *self, const struct argparse_option *options)
-{
-    for (; options->type != ARGPARSE_OPT_END; options++) {
-        if (options->short_name == *self->optvalue) {
-            self->optvalue = self->optvalue[1] ? self->optvalue + 1 : NULL;
-            return argparse_getvalue(self, options, 0);
-        }
-    }
-    return -2;
-}
-
-static int
-argparse_long_opt(struct argparse *self, const struct argparse_option *options)
-{
-    for (; options->type != ARGPARSE_OPT_END; options++) {
-        const char *rest;
-        int opt_flags = 0;
-        if (!options->long_name)
-            continue;
-
-        rest = prefix_skip(self->argv[0] + 2, options->long_name);
-        if (!rest) {
-            // negation disabled?
-            if (options->flags & OPT_NONEG) {
-                continue;
-            }
-            // only OPT_BOOLEAN/OPT_BIT supports negation
-            if (options->type != ARGPARSE_OPT_BOOLEAN && options->type !=
-                ARGPARSE_OPT_BIT) {
-                continue;
-            }
-
-            if (prefix_cmp(self->argv[0] + 2, "no-")) {
-                continue;
-            }
-            rest = prefix_skip(self->argv[0] + 2 + 3, options->long_name);
-            if (!rest)
-                continue;
-            opt_flags |= OPT_UNSET;
-        }
-        if (*rest) {
-            if (*rest != '=')
-                continue;
-            self->optvalue = rest + 1;
-        }
-        return argparse_getvalue(self, options, opt_flags | OPT_LONG);
-    }
-    return -2;
-}
-
-int
-argparse_init(struct argparse *self, struct argparse_option *options,
-              const char *const *usages, int flags)
-{
-    memset(self, 0, sizeof(*self));
-    self->options     = options;
-    self->usages      = usages;
-    self->flags       = flags;
-    self->description = NULL;
-    self->epilog      = NULL;
-    return 0;
-}
-
-void
-argparse_describe(struct argparse *self, const char *description,
-                  const char *epilog)
-{
-    self->description = description;
-    self->epilog      = epilog;
-}
-
-int
-argparse_parse(struct argparse *self, int argc, const char **argv)
-{
-    self->argc = argc - 1;
-    self->argv = argv + 1;
-    self->out  = argv;
-
-    argparse_options_check(self->options);
-
-    for (; self->argc; self->argc--, self->argv++) {
-        const char *arg = self->argv[0];
-        if (arg[0] != '-' || !arg[1]) {
-            if (self->flags & ARGPARSE_STOP_AT_NON_OPTION) {
-                goto end;
-            }
-            // if it's not option or is a single char '-', copy verbatim
-            self->out[self->cpidx++] = self->argv[0];
-            continue;
-        }
-        // short option
-        if (arg[1] != '-') {
-            self->optvalue = arg + 1;
-            switch (argparse_short_opt(self, self->options)) {
-            case -1:
-                break;
-            case -2:
-                goto unknown;
-            }
-            while (self->optvalue) {
-                switch (argparse_short_opt(self, self->options)) {
-                case -1:
-                    break;
-                case -2:
-                    goto unknown;
-                }
-            }
-            continue;
-        }
-        // if '--' presents
-        if (!arg[2]) {
-            self->argc--;
-            self->argv++;
-            break;
-        }
-        // long option
-        switch (argparse_long_opt(self, self->options)) {
-        case -1:
-            break;
-        case -2:
-            goto unknown;
-        }
-        continue;
-
-unknown:
-        fprintf(stderr, "error: unknown option `%s`\n", self->argv[0]);
-        argparse_usage(self);
-        if (!(self->flags & ARGPARSE_IGNORE_UNKNOWN_ARGS)) {
-            exit(EXIT_FAILURE);
-        }
-    }
-
-end:
-    memmove(self->out + self->cpidx, self->argv,
-            self->argc * sizeof(*self->out));
-    self->out[self->cpidx + self->argc] = NULL;
-
-    return self->cpidx + self->argc;
-}
-
-void
-argparse_usage(struct argparse *self)
-{
-    if (self->usages) {
-        fprintf(stdout, "Usage: %s\n", *self->usages++);
-        while (*self->usages && **self->usages)
-            fprintf(stdout, "   or: %s\n", *self->usages++);
-    } else {
-        fprintf(stdout, "Usage:\n");
-    }
-
-    // print description
-    if (self->description)
-        fprintf(stdout, "%s\n", self->description);
-
-    fputc('\n', stdout);
-
-    const struct argparse_option *options;
-
-    // figure out best width
-    size_t usage_opts_width = 0;
-    size_t len;
-    options = self->options;
-    for (; options->type != ARGPARSE_OPT_END; options++) {
-        len = 0;
-        if ((options)->short_name) {
-            len += 2;
-        }
-        if ((options)->short_name && (options)->long_name) {
-            len += 2;           // separator ", "
-        }
-        if ((options)->long_name) {
-            len += strlen((options)->long_name) + 2;
-        }
-        if (options->type == ARGPARSE_OPT_INTEGER) {
-            len += strlen("=<int>");
-        }
-        if (options->type == ARGPARSE_OPT_FLOAT) {
-            len += strlen("=<flt>");
-        } else if (options->type == ARGPARSE_OPT_STRING) {
-            len += strlen("=<str>");
-        }
-        len = (len + 3) - ((len + 3) & 3);
-        if (usage_opts_width < len) {
-            usage_opts_width = len;
-        }
-    }
-    usage_opts_width += 4;      // 4 spaces prefix
-
-    options = self->options;
-    for (; options->type != ARGPARSE_OPT_END; options++) {
-        size_t pos = 0;
-        size_t pad = 0;
-        if (options->type == ARGPARSE_OPT_GROUP) {
-            fputc('\n', stdout);
-            fprintf(stdout, "%s", options->help);
-            fputc('\n', stdout);
-            continue;
-        }
-        pos = fprintf(stdout, "    ");
-        if (options->short_name) {
-            pos += fprintf(stdout, "-%c", options->short_name);
-        }
-        if (options->long_name && options->short_name) {
-            pos += fprintf(stdout, ", ");
-        }
-        if (options->long_name) {
-            pos += fprintf(stdout, "--%s", options->long_name);
-        }
-        if (options->type == ARGPARSE_OPT_INTEGER) {
-            pos += fprintf(stdout, "=<int>");
-        } else if (options->type == ARGPARSE_OPT_FLOAT) {
-            pos += fprintf(stdout, "=<flt>");
-        } else if (options->type == ARGPARSE_OPT_STRING) {
-            pos += fprintf(stdout, "=<str>");
-        }
-        if (pos <= usage_opts_width) {
-            pad = usage_opts_width - pos;
-        } else {
-            fputc('\n', stdout);
-            pad = usage_opts_width;
-        }
-        fprintf(stdout, "%*s%s\n", (int)pad + 2, "", options->help);
-    }
-
-    // print epilog
-    if (self->epilog)
-        fprintf(stdout, "%s\n", self->epilog);
-}
-
-int
-argparse_help_cb_no_exit(struct argparse *self,
-                         const struct argparse_option *option)
-{
-    (void)option;
-    argparse_usage(self);
-    return (EXIT_SUCCESS);
-}
-
-int
-argparse_help_cb(struct argparse *self, const struct argparse_option *option)
-{
-    argparse_help_cb_no_exit(self, option);
-    exit(EXIT_SUCCESS);
-}
-
--- a/frontend/argparse.h
+++ /dev/null
@@ -1,133 +1,0 @@
-/**
- * Copyright (C) 2012-2015 Yecheng Fu <cofyc.jackson at gmail dot com>
- * All rights reserved.
- *
- * Use of this source code is governed by a MIT-style license that can be found
- * in the LICENSE file.
- */
-#ifndef ARGPARSE_H
-#define ARGPARSE_H
-
-/* For c++ compatibility */
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include "p9.h"
-
-struct argparse;
-struct argparse_option;
-
-typedef int argparse_callback (struct argparse *self,
-                               const struct argparse_option *option);
-
-enum argparse_flag {
-    ARGPARSE_STOP_AT_NON_OPTION  = 1 << 0,
-    ARGPARSE_IGNORE_UNKNOWN_ARGS = 1 << 1,
-};
-
-enum argparse_option_type {
-    /* special */
-    ARGPARSE_OPT_END,
-    ARGPARSE_OPT_GROUP,
-    /* options with no arguments */
-    ARGPARSE_OPT_BOOLEAN,
-    ARGPARSE_OPT_BIT,
-    /* options with arguments (optional or required) */
-    ARGPARSE_OPT_INTEGER,
-    ARGPARSE_OPT_FLOAT,
-    ARGPARSE_OPT_STRING,
-};
-
-enum argparse_option_flags {
-    OPT_NONEG = 1,              /* disable negation */
-};
-
-/**
- *  argparse option
- *
- *  `type`:
- *    holds the type of the option, you must have an ARGPARSE_OPT_END last in your
- *    array.
- *
- *  `short_name`:
- *    the character to use as a short option name, '\0' if none.
- *
- *  `long_name`:
- *    the long option name, without the leading dash, NULL if none.
- *
- *  `value`:
- *    stores pointer to the value to be filled.
- *
- *  `help`:
- *    the short help message associated to what the option does.
- *    Must never be NULL (except for ARGPARSE_OPT_END).
- *
- *  `callback`:
- *    function is called when corresponding argument is parsed.
- *
- *  `data`:
- *    associated data. Callbacks can use it like they want.
- *
- *  `flags`:
- *    option flags.
- */
-struct argparse_option {
-    enum argparse_option_type type;
-    const char short_name;
-    const char *long_name;
-    void *value;
-    const char *help;
-    argparse_callback *callback;
-    intptr_t data;
-    int flags;
-};
-
-/**
- * argpparse
- */
-struct argparse {
-    // user supplied
-    const struct argparse_option *options;
-    const char *const *usages;
-    int flags;
-    const char *description;    // a description after usage
-    const char *epilog;         // a description at the end
-    // internal context
-    int argc;
-    const char **argv;
-    const char **out;
-    int cpidx;
-    const char *optvalue;       // current option value
-};
-
-// built-in callbacks
-int argparse_help_cb(struct argparse *self,
-                     const struct argparse_option *option);
-int argparse_help_cb_no_exit(struct argparse *self,
-                             const struct argparse_option *option);
-
-// built-in option macros
-#define OPT_END()        { ARGPARSE_OPT_END, 0, NULL, NULL, 0, NULL, 0, 0 }
-#define OPT_BOOLEAN(...) { ARGPARSE_OPT_BOOLEAN, __VA_ARGS__ }
-#define OPT_BIT(...)     { ARGPARSE_OPT_BIT, __VA_ARGS__ }
-#define OPT_INTEGER(...) { ARGPARSE_OPT_INTEGER, __VA_ARGS__ }
-#define OPT_FLOAT(...)   { ARGPARSE_OPT_FLOAT, __VA_ARGS__ }
-#define OPT_STRING(...)  { ARGPARSE_OPT_STRING, __VA_ARGS__ }
-#define OPT_GROUP(h)     { ARGPARSE_OPT_GROUP, 0, NULL, NULL, h, NULL, 0, 0 }
-#define OPT_HELP()       OPT_BOOLEAN('h', "help", NULL,                 \
-                                     "show this help message and exit", \
-                                     argparse_help_cb, 0, OPT_NONEG)
-
-int argparse_init(struct argparse *self, struct argparse_option *options,
-                  const char *const *usages, int flags);
-void argparse_describe(struct argparse *self, const char *description,
-                       const char *epilog);
-int argparse_parse(struct argparse *self, int argc, const char **argv);
-void argparse_usage(struct argparse *self);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
--- a/frontend/common.h
+++ /dev/null
@@ -1,17 +1,0 @@
-#ifndef COMMON_H
-#define COMMON_H
-
-#ifndef OS_INFO
-#define OS_INFO unknown
-#endif
-#ifndef REP_VERSION
-#define REP_VERSION latest
-#endif
-#ifndef REP_COMMIT_HASH
-#define REP_COMMIT_HASH latest
-#endif
-
-#define STR1(m) #m
-#define STR(m) STR1(m)
-
-#endif
\ No newline at end of file
--- a/frontend/config.c
+++ /dev/null
@@ -1,299 +1,0 @@
-#include <string.h>
-#include <stdlib.h>
-
-#include "config.h"
-#include "common.h"
-
-#include "../psx/log.h"
-
-static const char* g_version_text =
-#ifdef _WIN32
-    "psxe.exe (" STR(OS_INFO) ") " STR(REP_VERSION) "-" STR(REP_COMMIT_HASH) "\n"
-#elif __linux__
-    "psxe (" STR(OS_INFO) ") " STR(REP_VERSION) "-" STR(REP_COMMIT_HASH) "\n"
-#else
-    "psxe (" STR(OS_INFO) ") " STR(REP_VERSION) "-" STR(REP_COMMIT_HASH) "\n"
-#endif
-    "\nPSXE - A simple, fast and portable Sony PlayStation emulator.\n\n"
-    "Copyright (C) 2023 Allkern (Lisandro Alarcon)\n"
-    "This is free software; see the source for copying conditions.  There is NO\n"
-    "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
-
-static const char g_default_settings[] =
-    "# Settings file generated by PSXE\n"
-    "\n"
-    "# Don't change please, reserved for future use\n"
-    "psxe_version = \"" STR(REP_VERSION) "\"\n"
-    "\n"
-    "# BIOS-related settings:\n"
-    "[bios]\n"
-    "    search_path     = \"bios\"\n"
-    "    preferred_model = \"SCPH-1001\"\n"
-    "    override_file   = \"\"\n"
-    "\n"
-    "# Console settings\n"
-    "[console]\n"
-    "    region          = \"auto\"\n";
-
-static const char* g_models_text =
-    "Available console models:\n"
-    "\"scph1000\" (SCPH-1000) [NTSC-J]\n"
-    "\"scph1001\" (SCPH-1001) [NTSC-U/C]\n"
-    "\"scph1002\" (SCPH-1002) [PAL]\n"
-    "\"scph3000\" (SCPH-3000) [NTSC-J]\n"
-    "\"scph3500\" (SCPH-3500) [NTSC-J]\n"
-    "\"scph5000\" (SCPH-5000) [NTSC-U/C]\n"
-    "\"scph5501\" (SCPH-5501) [NTSC-U/C]\n"
-    "\"scph5500\" (SCPH-5500) [NTSC-J]\n"
-    "\"scph5502\" (SCPH-5502) [PAL]\n"
-    "\"scph5552\" (SCPH-5552) [PAL]\n"
-    "\"scph7000\" (SCPH-7000) [NTSC-J]\n"
-    "\"scph7001\" (SCPH-7001) [NTSC-U/C]\n"
-    "\"scph7002\" (SCPH-7002) [PAL]\n"
-    "\"scph7003\" (SCPH-7003) [NTSC-J]\n"
-    "\"scph7501\" (SCPH-7501) [NTSC]\n"
-    "\"scph7502\" (SCPH-7502) [PAL]\n"
-    "\"scph9002\" (SCPH-9002) [PAL]\n"
-    "\"scph100\" (SCPH-100) [NTSC-J]\n"
-    "\"scph101\" (SCPH-101) [NTSC-U/C]\n"
-    "\"scph102a\" (SCPH-102A) [PAL]\n"
-    "\"scph102b\" (SCPH-102B) [PAL]\n"
-    "\"scph102c\" (SCPH-102C) [?]\n";
-
-static const char* g_regions_text =
-    "Available region options: \"ntsc\", \"pal\", \"auto\"\n";
-
-static const char* g_desc_text =
-    "\nPlease report any bugs to <https://github.com/allkern/psxe/issues>\n";
-
-psxe_config_t* psxe_cfg_create(void) {
-    return (psxe_config_t*)malloc(sizeof(psxe_config_t));
-}
-
-void psxe_cfg_init(psxe_config_t* cfg) {
-    memset(cfg, 0, sizeof(psxe_config_t));
-}
-
-void psxe_cfg_destroy(psxe_config_t* cfg) {
-    free(cfg);
-}
-
-void psxe_cfg_load_defaults(psxe_config_t* cfg) {
-    cfg->bios = "bios.bin";
-    cfg->bios_search = "bios";
-    cfg->exe = NULL;
-    cfg->help_model = 0;
-    cfg->help_region = 0;
-    cfg->model = "scph1001";
-    cfg->scale = 3;
-    cfg->psxe_version = STR(REP_VERSION);
-    cfg->region = "ntsc";
-    cfg->settings_path = NULL;
-    cfg->use_args = 0;
-    cfg->version = 0;
-    cfg->log_level = LOG_FATAL;
-    cfg->quiet = 0;
-    cfg->cd_path = NULL;
-    cfg->exp_path = NULL;
-}
-
-void psxe_cfg_load(psxe_config_t* cfg, int argc, const char* argv[]) {
-    log_set_level(LOG_INFO);
-
-    int use_args = 0;
-    int version = 0;
-    int help_model = 0;
-    int help_region = 0;
-    int log_level = 0;
-    int quiet = 0;
-    int console_source = 0;
-    int scale = 0;
-    const char* settings_path = NULL;
-    const char* bios = NULL;
-    const char* bios_search = NULL;
-    const char* model = NULL;
-    const char* exe = NULL;
-    const char* region = NULL;
-    const char* psxe_version = NULL;
-    const char* cd_path = NULL;
-    const char* exp_path = NULL;
-
-    static const char *const usages[] = {
-        "psxe [options] path-to-cdrom",
-        NULL,
-    };
-
-    struct argparse_option options[] = {
-        OPT_BOOLEAN ('h', "help"          , NULL           , "Display this information", argparse_help_cb, 0, 0),
-        OPT_BOOLEAN (0  , "help-model"    , &help_model    , "Display available console models", NULL, 0, 0),
-        OPT_BOOLEAN (0  , "help-region"   , &help_region   , "Display available region options", NULL, 0, 0),
-        OPT_BOOLEAN ('v', "version"       , &version       , "Display version and build information", NULL, 0, 0),
-        OPT_GROUP("Basic options"),
-        OPT_BOOLEAN ('a', "use-args"      , &use_args      , "Ignore settings file, use CLI args instead", NULL, 0, 0),
-        OPT_STRING  ('b', "bios"          , &bios          , "Specify a BIOS file (ignores -B, -M)", NULL, 0, 0),
-        OPT_BOOLEAN ('B', "bios-folder"   , &bios_search   , "Specify a BIOS search folder", NULL, 0, 0),
-        OPT_STRING  ('c', "console-source", &console_source, "Select console source (auto, null, kernel, atcons)"),
-        OPT_STRING  ('e', "exp-rom"       , &exp_path      , "Specify an expansion ROM file"),
-        OPT_INTEGER ('L', "log-level"     , &log_level     , "Set log level"),
-        OPT_STRING  ('M', "model"         , &model         , "Specify console model (SPCH-XXXX)", NULL, 0, 0),
-        OPT_STRING  ('r', "region"        , &region        , "Specify console region"),
-        OPT_INTEGER ('s', "scale"         , &scale         , "Display scaling factor", NULL, 0, 0),
-        OPT_STRING  ('S', "settings-file" , &settings_path , "Specify settings file path", NULL, 0, 0),
-        OPT_BOOLEAN ('q', "quiet"         , &quiet         , "Silence all logs (ignores -L)"),
-        OPT_STRING  ('x', "exe"           , &exe           , "Launch a PS-X EXE file"),
-        OPT_STRING  (0  , "cdrom"         , &cd_path       , "Specify a CDROM image"),
-        OPT_END()
-    };
-
-    struct argparse argparse;
-
-    argparse_init(&argparse, options, usages, 0);
-    argparse_describe(&argparse, NULL, g_desc_text);
-
-    argc = argparse_parse(&argparse, argc, argv);
-
-    if (help_model) {
-        printf("%s\n", g_models_text);
-
-        exit(0);
-    }
-
-    if (help_region) {
-        printf("%s\n", g_regions_text);
-
-        exit(0);
-    }
-
-    if (version) {
-        printf("%s\n", g_version_text);
-
-        exit(0);
-    }
-
-    log_set_quiet(quiet);
-
-    if (!use_args) {
-        if (!settings_path)
-            settings_path = "settings.toml";
-
-        FILE* settings = fopen(settings_path, "rb");
-
-        char error[0x100];
-
-        if (!settings) {
-            settings = fopen("settings.toml", "w+b");
-
-            if (!settings) {
-                log_error("Couldn't create settings file, loading default settings");
-
-                psxe_cfg_load_defaults(cfg);
-
-                return;
-            }
-
-            fwrite(g_default_settings, 1, sizeof(g_default_settings) - 1, settings);
-
-            fseek(settings, 0, 0);
-        }
-
-        log_info("Parsing settings file...");
-
-        toml_table_t* conf = toml_parse_file(settings, error, sizeof(error));
-
-        if (!conf) {
-            log_error("Couldn't parse settings file");
-
-            exit(1);
-        }
-
-        toml_datum_t s_version = toml_string_in(conf, "psxe_version");
-
-        if (!s_version.ok) {
-            log_error("Settings file lacking version number");
-
-            exit(1);
-        }
-
-        toml_table_t* s_bios_table = toml_table_in(conf, "bios");
-
-        if (s_bios_table) {
-            toml_datum_t s_bios_search_path = toml_string_in(s_bios_table, "search_path");
-
-            if (s_bios_search_path.ok)
-                bios_search = s_bios_search_path.u.s;
-
-            toml_datum_t s_bios_preferred_model = toml_string_in(s_bios_table, "preferred_model");
-
-            if (s_bios_preferred_model.ok)
-                model = s_bios_preferred_model.u.s;
-
-            toml_datum_t s_bios_override_file = toml_string_in(s_bios_table, "override_file");
-
-            if (s_bios_override_file.ok)
-                bios = s_bios_override_file.u.s;
-        }
-
-        toml_table_t* s_console_table = toml_table_in(conf, "console");
-
-        if (s_console_table) {
-            toml_datum_t s_console_region = toml_string_in(s_console_table, "region");
-
-            if (s_console_region.ok)
-                region = s_console_region.u.s;
-        }
-
-        psxe_version = s_version.u.s;
-
-        log_info("Settings file parsed. PSXE version: %s", psxe_version);
-
-        fclose(settings);
-    }
-
-    if (argc) {
-        if (argc > 1) {
-            log_error("Unrecognized parameter \'%s\'", argv[1]);
-
-            exit(1);
-        }
-
-        cd_path = argv[0];
-    }
-
-    if (cd_path)
-        cfg->cd_path = cd_path;
-
-    if (log_level)
-        cfg->log_level = log_level - 1;
-
-    if (bios)
-        cfg->bios = bios;
-
-    if (bios_search)
-        cfg->bios_search = bios_search;
-
-    if (model)
-        cfg->model = model;
-
-    if (exe)
-        cfg->exe = exe;
-
-    if (region)
-        cfg->region = region;
-
-    if (psxe_version)
-        cfg->psxe_version = psxe_version;
-
-    if (exp_path)
-        cfg->exp_path = exp_path;
-
-    if (scale)
-        cfg->scale = scale;
-}
-
-// To-do: Implement BIOS searching
-char* psxe_cfg_get_bios_path(psxe_config_t* cfg) {
-    return NULL;
-}
-
-#undef STR1
-#undef STR
\ No newline at end of file
--- a/frontend/config.h
+++ /dev/null
@@ -1,37 +1,0 @@
-#ifndef CONFIG_H
-#define CONFIG_H
-
-#include <stdlib.h>
-
-#include "argparse.h"
-#include "toml.h"
-
-typedef struct {
-    int use_args;
-    int version;
-    int help_model;
-    int help_region;
-    int log_level;
-    int quiet;
-    int console_source;
-    int scale;
-    const char* snap_path;
-    const char* settings_path;
-    const char* bios;
-    const char* bios_search;
-    const char* model;
-    const char* exe;
-    const char* region;
-    const char* psxe_version;
-    const char* cd_path;
-    const char* exp_path;
-} psxe_config_t;
-
-psxe_config_t* psxe_cfg_create(void);
-void psxe_cfg_init(psxe_config_t*);
-void psxe_cfg_load_defaults(psxe_config_t*);
-void psxe_cfg_load(psxe_config_t*, int, const char**);
-char* psxe_cfg_get_bios_path(psxe_config_t*);
-void psxe_cfg_destroy(psxe_config_t*);
-
-#endif
\ No newline at end of file
--- a/frontend/main.c
+++ /dev/null
@@ -1,129 +1,0 @@
-#include "../psx/psx.h"
-#include "../psx/input/sda.h"
-#include "../psx/input/guncon.h"
-#include "../psx/dev/cdrom/cdrom.h"
-
-#include "screen.h"
-#include "config.h"
-
-#undef main
-
-void audio_update(void* ud, uint8_t* buf, int size) {
-    psx_cdrom_t* cdrom = ((psx_t*)ud)->cdrom;
-    psx_spu_t* spu = ((psx_t*)ud)->spu;
-
-    memset(buf, 0, size);
-
-    psx_cdrom_get_audio_samples(cdrom, buf, size);
-    psx_spu_update_cdda_buffer(spu, cdrom->cdda_buf);
-
-    for (int i = 0; i < (size >> 2); i++) {
-        uint32_t sample = psx_spu_get_sample(spu);
-
-        int16_t left = (int16_t)(sample & 0xffff);
-        int16_t right = (int16_t)(sample >> 16);
-
-        *(int16_t*)(&buf[(i << 2) + 0]) += left;
-        *(int16_t*)(&buf[(i << 2) + 2]) += right;
-    }
-}
-
-int main(int argc, const char* argv[]) {
-    psxe_config_t* cfg = psxe_cfg_create();
-
-    psxe_cfg_init(cfg);
-    psxe_cfg_load_defaults(cfg);
-    psxe_cfg_load(cfg, argc, argv);
-
-    log_set_level(cfg->log_level);
-
-    psx_t* psx = psx_create();
-    psx_init(psx, cfg->bios, cfg->exp_path);
-
-    psx_cdrom_t* cdrom = psx_get_cdrom(psx);
-
-    // To-do: Set CDROM firmware version and region based
-    //        on CLI options
-
-    if (cfg->cd_path)
-        psx_cdrom_open(cdrom, cfg->cd_path);
-
-    psxe_screen_t* screen = psxe_screen_create();
-    psxe_screen_init(screen, psx);
-    psxe_screen_set_scale(screen, cfg->scale);
-    psxe_screen_reload(screen);
-
-    SDL_Init(SDL_INIT_AUDIO);
-
-    SDL_AudioDeviceID dev;
-    SDL_AudioSpec obtained, desired;
-
-    desired.freq     = 44100;
-    desired.format   = AUDIO_S16SYS;
-    desired.channels = 2;
-    desired.samples  = CD_SECTOR_SIZE >> 2;
-    desired.callback = &audio_update;
-    desired.userdata = psx;
-
-    dev = SDL_OpenAudioDevice(NULL, 0, &desired, &obtained, 0);
-
-    if (dev)
-        SDL_PauseAudioDevice(dev, 0);
-    
-    psx_gpu_t* gpu = psx_get_gpu(psx);
-    psx_gpu_set_event_callback(gpu, GPU_EVENT_DMODE, psxe_gpu_dmode_event_cb);
-    psx_gpu_set_event_callback(gpu, GPU_EVENT_VBLANK, psxe_gpu_vblank_event_cb);
-    psx_gpu_set_event_callback(gpu, GPU_EVENT_HBLANK, psxe_gpu_hblank_event_cb);
-    psx_gpu_set_event_callback(gpu, GPU_EVENT_VBLANK_END, psxe_gpu_vblank_end_event_cb);
-    psx_gpu_set_event_callback(gpu, GPU_EVENT_HBLANK_END, psxe_gpu_hblank_end_event_cb);
-    psx_gpu_set_udata(gpu, 0, screen);
-    psx_gpu_set_udata(gpu, 1, psx->timer);
-
-    psx_input_t* input = psx_input_create();
-    psx_input_init(input);
-
-    // psxi_guncon_t* controller = psxi_guncon_create();
-    // psxi_guncon_init(controller);
-    // psxi_guncon_init_input(controller, input);
-    psxi_sda_t* controller = psxi_sda_create();
-    psxi_sda_init(controller, SDA_MODEL_DIGITAL);
-    psxi_sda_init_input(controller, input);
-
-    psx_pad_attach_joy(psx->pad, 0, input);
-    psx_pad_attach_mcd(psx->pad, 0, "slot1.mcd");
-    psx_pad_attach_mcd(psx->pad, 1, "slot2.mcd");
-
-    if (cfg->exe) {
-        while (psx->cpu->pc != 0x80030000)
-            psx_update(psx);
-
-        psx_load_exe(psx, cfg->exe);
-    }
-
-    psxe_cfg_destroy(cfg);
-
-    while (psxe_screen_is_open(screen))
-        psx_update(psx);
-
-    SDL_PauseAudioDevice(dev, 1);
-
-    psx_cpu_t* cpu = psx_get_cpu(psx);
-
-    log_set_quiet(0);
-
-    log_fatal("r0=%08x at=%08x v0=%08x v1=%08x", cpu->r[0] , cpu->r[1] , cpu->r[2] , cpu->r[3] );
-    log_fatal("a0=%08x a1=%08x a2=%08x a3=%08x", cpu->r[4] , cpu->r[5] , cpu->r[6] , cpu->r[7] );
-    log_fatal("t0=%08x t1=%08x t2=%08x t3=%08x", cpu->r[8] , cpu->r[9] , cpu->r[10], cpu->r[11]);
-    log_fatal("t4=%08x t5=%08x t6=%08x t7=%08x", cpu->r[12], cpu->r[13], cpu->r[14], cpu->r[15]);
-    log_fatal("s0=%08x s1=%08x s2=%08x s3=%08x", cpu->r[16], cpu->r[17], cpu->r[18], cpu->r[19]);
-    log_fatal("s4=%08x s5=%08x s6=%08x s7=%08x", cpu->r[20], cpu->r[21], cpu->r[22], cpu->r[23]);
-    log_fatal("t8=%08x t9=%08x k0=%08x k1=%08x", cpu->r[24], cpu->r[25], cpu->r[26], cpu->r[27]);
-    log_fatal("gp=%08x sp=%08x fp=%08x ra=%08x", cpu->r[28], cpu->r[29], cpu->r[30], cpu->r[31]);
-    log_fatal("pc=%08x hi=%08x lo=%08x ep=%08x", cpu->pc, cpu->hi, cpu->lo, cpu->cop0_r[COP0_EPC]);
-
-    psx_pad_detach_joy(psx->pad, 0);
-    psx_destroy(psx);
-    psxe_screen_destroy(screen);
-
-    return 0;
-}
\ No newline at end of file
--- a/frontend/screen.c
+++ /dev/null
@@ -1,534 +1,0 @@
-#include "screen.h"
-
-#include "input/sda.h"
-#include "input/guncon.h"
-
-uint32_t screen_get_button(SDL_Keycode k) {
-    if (k == SDLK_x     ) return PSXI_SW_SDA_CROSS;
-    if (k == SDLK_a     ) return PSXI_SW_SDA_SQUARE;
-    if (k == SDLK_w     ) return PSXI_SW_SDA_TRIANGLE;
-    if (k == SDLK_d     ) return PSXI_SW_SDA_CIRCLE;
-    if (k == SDLK_RETURN) return PSXI_SW_SDA_START;
-    if (k == SDLK_s     ) return PSXI_SW_SDA_SELECT;
-    if (k == SDLK_UP    ) return PSXI_SW_SDA_PAD_UP;
-    if (k == SDLK_DOWN  ) return PSXI_SW_SDA_PAD_DOWN;
-    if (k == SDLK_LEFT  ) return PSXI_SW_SDA_PAD_LEFT;
-    if (k == SDLK_RIGHT ) return PSXI_SW_SDA_PAD_RIGHT;
-    if (k == SDLK_q     ) return PSXI_SW_SDA_L1;
-    if (k == SDLK_e     ) return PSXI_SW_SDA_R1;
-    if (k == SDLK_1     ) return PSXI_SW_SDA_L2;
-    if (k == SDLK_3     ) return PSXI_SW_SDA_R2;
-    if (k == SDLK_z     ) return PSXI_SW_SDA_L3;
-    if (k == SDLK_c     ) return PSXI_SW_SDA_R3;
-    if (k == SDLK_2     ) return PSXI_SW_SDA_ANALOG;
-
-    return 0;
-}
-
-uint32_t screen_get_button_joystick(uint8_t b) {
-    if (b == SDL_CONTROLLER_BUTTON_A            ) return PSXI_SW_SDA_CROSS;
-    if (b == SDL_CONTROLLER_BUTTON_X            ) return PSXI_SW_SDA_SQUARE;
-    if (b == SDL_CONTROLLER_BUTTON_Y            ) return PSXI_SW_SDA_TRIANGLE;
-    if (b == SDL_CONTROLLER_BUTTON_B            ) return PSXI_SW_SDA_CIRCLE;
-    if (b == SDL_CONTROLLER_BUTTON_START        ) return PSXI_SW_SDA_START;
-    if (b == SDL_CONTROLLER_BUTTON_GUIDE        ) return PSXI_SW_SDA_SELECT;
-    if (b == SDL_CONTROLLER_BUTTON_DPAD_UP      ) return PSXI_SW_SDA_PAD_UP;
-    if (b == SDL_CONTROLLER_BUTTON_DPAD_DOWN    ) return PSXI_SW_SDA_PAD_DOWN;
-    if (b == SDL_CONTROLLER_BUTTON_DPAD_LEFT    ) return PSXI_SW_SDA_PAD_LEFT;
-    if (b == SDL_CONTROLLER_BUTTON_DPAD_RIGHT   ) return PSXI_SW_SDA_PAD_RIGHT;
-    if (b == SDL_CONTROLLER_BUTTON_LEFTSHOULDER ) return PSXI_SW_SDA_L1;
-    if (b == SDL_CONTROLLER_BUTTON_RIGHTSHOULDER) return PSXI_SW_SDA_R1;
-    if (b == SDL_CONTROLLER_AXIS_TRIGGERLEFT    ) return PSXI_SW_SDA_L2; // Can't map these yet
-    if (b == SDL_CONTROLLER_AXIS_TRIGGERRIGHT   ) return PSXI_SW_SDA_R2; // Can't map these yet
-    if (b == SDL_CONTROLLER_BUTTON_LEFTSTICK    ) return PSXI_SW_SDA_L3;
-    if (b == SDL_CONTROLLER_BUTTON_RIGHTSTICK   ) return PSXI_SW_SDA_R3;
-
-    return 0;
-} 
-
-SDL_GameController* screen_find_controller(void) {
-    for (int i = 0; i < SDL_NumJoysticks(); i++)
-        if (SDL_IsGameController(i))
-            return SDL_GameControllerOpen(i);
-
-    return NULL;
-}
-
-int screen_get_base_width(psxe_screen_t* screen) {
-    int width = psx_get_dmode_width(screen->psx);
-
-    switch (width) {
-        case 256: return 256;
-        case 320: return 320;
-        case 368: return 384;
-    }
-
-    return 320;
-}
-
-psxe_screen_t* psxe_screen_create(void) {
-    return (psxe_screen_t*)malloc(sizeof(psxe_screen_t));
-}
-
-void psxe_screen_init(psxe_screen_t* screen, psx_t* psx) {
-    memset(screen, 0, sizeof(psxe_screen_t));
-
-    if (screen->debug_mode) {
-        screen->width = PSX_GPU_FB_WIDTH;
-        screen->height = PSX_GPU_FB_HEIGHT;
-    } else {
-        screen->width = 320;
-        screen->height = 240;
-    }
-
-    screen->scale = 1;
-    screen->open = 1;
-    screen->format = SDL_PIXELFORMAT_BGR555;
-    screen->psx = psx;
-    screen->pad = psx_get_pad(psx);
-
-    screen->texture_width = PSX_GPU_FB_WIDTH;
-    screen->texture_height = PSX_GPU_FB_HEIGHT;
-
-    SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS | SDL_INIT_GAMECONTROLLER);
-    SDL_SetRenderDrawColor(screen->renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
-
-    screen->controller = screen_find_controller();
-}
-
-void psxe_screen_reload(psxe_screen_t* screen) {
-    if (screen->texture) SDL_DestroyTexture(screen->texture);
-    if (screen->renderer) SDL_DestroyRenderer(screen->renderer);
-    if (screen->window) SDL_DestroyWindow(screen->window);
-
-    if (screen->debug_mode) {
-        screen->width = PSX_GPU_FB_WIDTH;
-        screen->height = PSX_GPU_FB_HEIGHT;
-    } else {
-        if (screen->vertical_mode) {
-            screen->width = 240;
-            screen->height = screen_get_base_width(screen);
-        } else {
-            screen->width = screen_get_base_width(screen);
-            screen->height = 240;
-        }
-    }
-
-    screen->window = SDL_CreateWindow(
-        "psxe " STR(REP_VERSION) "-" STR(REP_COMMIT_HASH),
-        SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
-        screen->width * screen->scale,
-        screen->height * screen->scale,
-        0
-    );
-
-    screen->renderer = SDL_CreateRenderer(
-        screen->window,
-        -1,
-        SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC
-    );
-
-    screen->texture = SDL_CreateTexture(
-        screen->renderer,
-        screen->format,
-        SDL_TEXTUREACCESS_STREAMING,
-        screen->texture_width, screen->texture_height
-    );
-
-#if SDL_VERSION_ATLEAST(2, 0, 12)
-    SDL_SetTextureScaleMode(screen->texture, screen->bilinear);
-#endif
-
-    // Check for retina displays
-    int width = 0, height = 0;
-
-    SDL_GetRendererOutputSize(screen->renderer, &width, &height);
-
-    if (width != (screen->width * screen->scale)) {
-        float width_scale = (float)width / (float)(screen->width * screen->scale);
-        float height_scale = (float)height / (float)(screen->height * screen->scale);
-
-        SDL_RenderSetScale(screen->renderer, width_scale, height_scale);
-    }
-
-    screen->open = 1;
-}
-
-int psxe_screen_is_open(psxe_screen_t* screen) {
-    return screen->open;
-}
-
-void psxe_screen_toggle_debug_mode(psxe_screen_t* screen) {
-    screen->debug_mode = !screen->debug_mode;
-
-    psxe_screen_set_scale(screen, screen->saved_scale);
-
-    screen->texture_width = PSX_GPU_FB_WIDTH;
-    screen->texture_height = PSX_GPU_FB_HEIGHT;
-
-    psxe_gpu_dmode_event_cb(screen->psx->gpu);
-}
-
-// int frame = 0;
-
-void psxe_screen_update(psxe_screen_t* screen) {
-    void* display_buf = screen->debug_mode ?
-        psx_get_vram(screen->psx) : psx_get_display_buffer(screen->psx);
-
-    // printf("res=(%u,%u) off=(%u,%u) disp=(%u,%u-%u,%u) draw=(%u,%u-%u,%u) vres=%u\n",
-    //     screen->texture_width,
-    //     screen->texture_height,
-    //     screen->psx->gpu->disp_x,
-    //     screen->psx->gpu->disp_y,
-    //     screen->psx->gpu->disp_x1,
-    //     screen->psx->gpu->disp_y1,
-    //     screen->psx->gpu->disp_x2,
-    //     screen->psx->gpu->disp_y2,
-    //     screen->psx->gpu->draw_x1,
-    //     screen->psx->gpu->draw_y1,
-    //     screen->psx->gpu->draw_x2,
-    //     screen->psx->gpu->draw_y2,
-    //     screen->psx->gpu->disp_y2 - screen->psx->gpu->disp_y1
-    // );
-
-    if ((screen->psx->gpu->disp_y + screen->texture_height) > 512)
-        display_buf = psx_get_vram(screen->psx);
-
-    SDL_UpdateTexture(screen->texture, NULL, display_buf, PSX_GPU_FB_STRIDE);
-    SDL_RenderClear(screen->renderer);
-
-    if (!screen->debug_mode) {
-        SDL_Rect dstrect;
-
-        dstrect.x = screen->image_xoff;
-        dstrect.y = screen->image_yoff;
-        dstrect.w = screen->image_width;
-        dstrect.h = screen->image_height;
-
-        SDL_RenderCopyEx(
-            screen->renderer,
-            screen->texture,
-            NULL, &dstrect,
-            screen->vertical_mode ? 270 : 0,
-            NULL, SDL_FLIP_NONE
-        );
-    } else {
-        SDL_RenderCopy(screen->renderer, screen->texture, NULL, NULL);
-    }
-
-    SDL_RenderPresent(screen->renderer);
-
-    SDL_Event event;
-
-    while (SDL_PollEvent(&event)) {
-        switch (event.type) {
-            case SDL_QUIT: {
-                screen->open = 0;
-            } break;
-
-            case SDL_KEYDOWN: {
-                switch (event.key.keysym.sym) {
-                    case SDLK_F1: {
-                        psxe_screen_toggle_debug_mode(screen);
-
-                        return;
-                    } break;
-
-                    case SDLK_F2: {
-                        SDL_Surface* surface = SDL_CreateRGBSurfaceWithFormat(
-                            0,
-                            screen->width,
-                            screen->height,
-                            16,
-                            SDL_PIXELFORMAT_BGR555
-                        );
-
-                        SDL_RenderReadPixels(
-                            screen->renderer,
-                            NULL,
-                            SDL_PIXELFORMAT_BGR555,
-                            surface->pixels, surface->pitch
-                        );
-
-                        SDL_SaveBMP(surface, "snap/screenshot.bmp");
-
-                        SDL_FreeSurface(surface);
-                    } break;
-
-                    case SDLK_F3: {
-                        screen->vertical_mode = !screen->vertical_mode;
-
-                        psxe_gpu_dmode_event_cb(screen->psx->gpu);
-                    } break;
-
-                    case SDLK_F4: {
-                        screen->bilinear = !screen->bilinear;
-
-                        psxe_gpu_dmode_event_cb(screen->psx->gpu);
-                    } break;
-
-                    case SDLK_F11: {
-                        screen->fullscreen = !screen->fullscreen;
-
-                        SDL_SetWindowFullscreen(
-                            screen->window,
-                            screen->fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0
-                        );
-
-                        psxe_gpu_dmode_event_cb(screen->psx->gpu);
-
-                        SDL_SetRenderDrawColor(screen->renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
-                        SDL_RenderClear(screen->renderer);
-                    } break;
-
-                    case SDLK_F5: {
-                        psx_soft_reset(screen->psx);
-                    } break;
-
-                    case SDLK_F6: {
-                        psx_swap_disc(screen->psx, ".\\roms\\Street Fighter II Movie (Japan) (Disc 2)\\Street Fighter II Movie (Japan) (Disc 2).cue");
-                    } break;
-                }
-
-                uint32_t mask = screen_get_button(event.key.keysym.sym);
-
-                psx_pad_button_press(screen->pad, 0, mask);
-
-                if (event.key.keysym.sym == SDLK_RETURN)
-                    psx_exp2_atcons_put(screen->psx->exp2, 13);
-            } break;
-
-            case SDL_CONTROLLERDEVICEADDED: {
-                if (!screen->controller)
-                    screen->controller = SDL_GameControllerOpen(event.cdevice.which);
-            } break;
-
-            case SDL_CONTROLLERDEVICEREMOVED: {
-                SDL_Joystick* joy = SDL_GameControllerGetJoystick(screen->controller);
-                SDL_JoystickID id = SDL_JoystickInstanceID(joy);
-
-                if (screen->controller && (event.cdevice.which == id)) {
-                    SDL_GameControllerClose(screen->controller);
-
-                    screen->controller = screen_find_controller();
-                }
-            } break;
-
-            case SDL_CONTROLLERBUTTONDOWN: {
-                SDL_Joystick* joy = SDL_GameControllerGetJoystick(screen->controller);
-                SDL_JoystickID id = SDL_JoystickInstanceID(joy);
-
-                if (screen->controller && (event.cdevice.which == id)) {
-                    uint32_t mask = screen_get_button_joystick(event.cbutton.button);
-
-                    psx_pad_button_press(screen->pad, 0, mask);
-                }
-            } break;
-
-            case SDL_CONTROLLERBUTTONUP: {
-                SDL_Joystick* joy = SDL_GameControllerGetJoystick(screen->controller);
-                SDL_JoystickID id = SDL_JoystickInstanceID(joy);
-
-                if (screen->controller && (event.cdevice.which == id)) {
-                    uint32_t mask = screen_get_button_joystick(event.cbutton.button);
-
-                    psx_pad_button_release(screen->pad, 0, mask);
-                }
-            } break;
-
-            case SDL_CONTROLLERAXISMOTION: {
-                SDL_Joystick* joy = SDL_GameControllerGetJoystick(screen->controller);
-                SDL_JoystickID id = SDL_JoystickInstanceID(joy);
-
-                if (screen->controller && (event.cdevice.which == id)) {
-                    int mapped_axis = ((int)event.caxis.value + INT16_MAX + 1) / 0x100;
-
-                    switch (event.caxis.axis) {
-                        case SDL_CONTROLLER_AXIS_RIGHTX:
-                            psx_pad_analog_change(screen->pad, 0, PSXI_AX_SDA_RIGHT_HORZ, mapped_axis);
-                        break;
-
-                        case SDL_CONTROLLER_AXIS_RIGHTY:
-                            psx_pad_analog_change(screen->pad, 0, PSXI_AX_SDA_RIGHT_VERT, mapped_axis);
-                        break;
-
-                        case SDL_CONTROLLER_AXIS_LEFTX:
-                            psx_pad_analog_change(screen->pad, 0, PSXI_AX_SDA_LEFT_HORZ, mapped_axis);
-                        break;
-
-                        case SDL_CONTROLLER_AXIS_LEFTY:
-                            psx_pad_analog_change(screen->pad, 0, PSXI_AX_SDA_LEFT_VERT, mapped_axis);
-                        break;
-                    }
-                }
-            } break;
-
-            // To-do: GunCon
-            // case SDL_MOUSEMOTION: {
-            //     psx_pad_analog_change(screen->pad, 0, PSXI_AX_GUNCON_SX, psx_get_dmode_width(screen->psx));
-            //     psx_pad_analog_change(screen->pad, 0, PSXI_AX_GUNCON_SY, psx_get_dmode_height(screen->psx));
-            //     psx_pad_analog_change(screen->pad, 0, PSXI_AX_GUNCON_X, event.motion.x * (1.0f / (float)screen->scale));
-            //     psx_pad_analog_change(screen->pad, 0, PSXI_AX_GUNCON_Y, event.motion.y * (1.0f / (float)screen->scale));
-            // } break;
-
-            // case SDL_MOUSEBUTTONDOWN: {
-            //     switch (event.button.button) {
-            //         case SDL_BUTTON_LEFT: {
-            //             psx_pad_button_press(screen->pad, 0, PSXI_SW_GUNCON_A);
-            //         } break;
-
-            //         case SDL_BUTTON_RIGHT: {
-            //             psx_pad_button_press(screen->pad, 0, PSXI_SW_GUNCON_B);
-            //         } break;
-
-            //         case SDL_BUTTON_MIDDLE: {
-            //             psx_pad_button_press(screen->pad, 0, PSXI_SW_GUNCON_TRIGGER);
-            //         } break;
-            //     }
-            // } break;
-
-            // case SDL_MOUSEBUTTONUP: {
-            //     switch (event.button.button) {
-            //         case SDL_BUTTON_LEFT: {
-            //             psx_pad_button_release(screen->pad, 0, PSXI_SW_GUNCON_A);
-            //         } break;
-
-            //         case SDL_BUTTON_RIGHT: {
-            //             psx_pad_button_release(screen->pad, 0, PSXI_SW_GUNCON_B);
-            //         } break;
-
-            //         case SDL_BUTTON_MIDDLE: {
-            //             psx_pad_button_release(screen->pad, 0, PSXI_SW_GUNCON_TRIGGER);
-            //         } break;
-            //     }
-            // } break;
-
-            case SDL_TEXTINPUT: {
-                psx_exp2_atcons_put(screen->psx->exp2, event.text.text[0]);
-            } break;
-
-            case SDL_KEYUP: {
-                uint32_t mask = screen_get_button(event.key.keysym.sym);
-
-                psx_pad_button_release(screen->pad, 0, mask);
-            } break;
-        }
-    }
-}
-
-void psxe_screen_set_scale(psxe_screen_t* screen, unsigned int scale) {
-    if (screen->debug_mode) {
-        screen->scale = 1;
-    } else {
-        screen->scale = scale;
-        screen->saved_scale = scale;
-    }
-}
-
-void psxe_screen_destroy(psxe_screen_t* screen) {
-    SDL_DestroyTexture(screen->texture);
-    SDL_DestroyRenderer(screen->renderer);
-    SDL_DestroyWindow(screen->window);
-
-    SDL_Quit();
-
-    free(screen);
-}
-
-void psxe_gpu_dmode_event_cb(psx_gpu_t* gpu) {
-    psxe_screen_t* screen = gpu->udata[0];
-
-    // printf("res=(%u,%u) off=(%u,%u) disp=(%u,%u-%u,%u) draw=(%u,%u-%u,%u) vres=%u\n",
-    //     screen->texture_width,
-    //     screen->texture_height,
-    //     screen->psx->gpu->disp_x,
-    //     screen->psx->gpu->disp_y,
-    //     screen->psx->gpu->disp_x1,
-    //     screen->psx->gpu->disp_y1,
-    //     screen->psx->gpu->disp_x2,
-    //     screen->psx->gpu->disp_y2,
-    //     screen->psx->gpu->draw_x1,
-    //     screen->psx->gpu->draw_y1,
-    //     screen->psx->gpu->draw_x2,
-    //     screen->psx->gpu->draw_y2,
-    //     screen->psx->gpu->disp_y2 - screen->psx->gpu->disp_y1
-    // );
-
-    screen->format = psx_get_display_format(screen->psx) ?
-        SDL_PIXELFORMAT_RGB24 : SDL_PIXELFORMAT_BGR555;
-
-    if (screen->debug_mode) {
-        screen->width = PSX_GPU_FB_WIDTH;
-        screen->height = PSX_GPU_FB_HEIGHT;
-        screen->texture_width = PSX_GPU_FB_WIDTH;
-        screen->texture_height = PSX_GPU_FB_HEIGHT;
-    } else {
-        if (screen->fullscreen) {
-            SDL_DisplayMode dm;
-            SDL_GetCurrentDisplayMode(0, &dm);
-
-            screen->width = dm.w;
-            screen->height = dm.h;
-
-            if (screen->vertical_mode) {
-                screen->image_width = screen->height;
-                screen->image_height = (double)screen->height / psx_get_display_aspect(screen->psx);
-
-                int off = (screen->image_width - screen->image_height) / 2;
-
-                screen->image_xoff = (screen->width / 2) - (screen->image_width / 2);
-                screen->image_yoff = off;
-            } else {
-                screen->image_width = (double)screen->height * psx_get_display_aspect(screen->psx);
-                screen->image_height = screen->height;
-                screen->image_xoff = (screen->width / 2) - (screen->image_width / 2);
-                screen->image_yoff = 0;
-            }
-        } else {
-            if (screen->vertical_mode) {
-                screen->width = 240 * screen->scale;
-                screen->height = screen_get_base_width(screen) * screen->scale;
-                screen->image_width = screen->height;
-                screen->image_height = screen->width;
-
-                int off = (screen->image_width - screen->image_height) / 2;
-
-                screen->image_xoff = -off;
-                screen->image_yoff = off;
-            } else {
-                screen->width = screen_get_base_width(screen) * screen->scale;
-                screen->height = 240 * screen->scale;
-                screen->image_width = screen->width;
-                screen->image_height = screen->height;
-                screen->image_xoff = 0;
-                screen->image_yoff = 0;
-            }
-        }
-
-        screen->texture_width = psx_get_display_width(screen->psx);
-        screen->texture_height = psx_get_display_height(screen->psx);
-    }
-
-    SDL_DestroyTexture(screen->texture);
-
-    screen->texture = SDL_CreateTexture(
-        screen->renderer,
-        screen->format,
-        SDL_TEXTUREACCESS_STREAMING,
-        screen->texture_width, screen->texture_height
-    );
-
-#if SDL_VERSION_ATLEAST(2, 0, 12)
-    SDL_SetTextureScaleMode(screen->texture, screen->bilinear);
-#endif
-
-    SDL_SetWindowSize(screen->window, screen->width, screen->height);
-}
-
-void psxe_gpu_vblank_event_cb(psx_gpu_t* gpu) {
-    psxe_screen_t* screen = gpu->udata[0];
-
-    psxe_screen_update(screen);
-
-    psxe_gpu_vblank_timer_event_cb(gpu);
-}
\ No newline at end of file
--- a/frontend/screen.h
+++ /dev/null
@@ -1,50 +1,0 @@
-#ifndef SCREEN_H
-#define SCREEN_H
-
-#include "../psx/psx.h"
-#include "common.h"
-
-#include <string.h>
-
-#include "SDL.h"
-#include "SDL_version.h"
-#include "SDL_gamecontroller.h"
-
-typedef struct {
-    SDL_Window* window;
-    SDL_Renderer* renderer;
-    SDL_Texture* texture;
-
-    psx_t* psx;
-    psx_pad_t* pad;
-
-    unsigned int saved_scale;
-    unsigned int width, height, scale;
-    unsigned int image_width, image_height;
-    unsigned int image_xoff, image_yoff;
-    unsigned int format;
-    unsigned int texture_width, texture_height;
-
-    int bilinear;
-    int fullscreen;
-    int vertical_mode;
-    int debug_mode;
-    int open;
-
-    SDL_GameController* controller;
-} psxe_screen_t;
-
-psxe_screen_t* psxe_screen_create(void);
-void psxe_screen_init(psxe_screen_t*, psx_t*);
-void psxe_screen_reload(psxe_screen_t*);
-int psxe_screen_is_open(psxe_screen_t*);
-void psxe_screen_update(psxe_screen_t*);
-void psxe_screen_destroy(psxe_screen_t*);
-void psxe_screen_set_scale(psxe_screen_t*, unsigned int);
-void psxe_screen_toggle_debug_mode(psxe_screen_t*);
-
-// GPU event handlers
-void psxe_gpu_dmode_event_cb(psx_gpu_t*);
-void psxe_gpu_vblank_event_cb(psx_gpu_t*);
-
-#endif
\ No newline at end of file
--- a/frontend/toml.c
+++ /dev/null
@@ -1,2383 +1,0 @@
-/*
-
-  MIT License
-
-  Copyright (c) CK Tan
-  https://github.com/cktan/tomlc99
-
-  Permission is hereby granted, free of charge, to any person obtaining a copy
-  of this software and associated documentation files (the "Software"), to deal
-  in the Software without restriction, including without limitation the rights
-  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-  copies of the Software, and to permit persons to whom the Software is
-  furnished to do so, subject to the following conditions:
-
-  The above copyright notice and this permission notice shall be included in all
-  copies or substantial portions of the Software.
-
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-  SOFTWARE.
-
-*/
-#define _POSIX_C_SOURCE 200809L
-#include "toml.h"
-#include <assert.h>
-#include <ctype.h>
-#include <errno.h>
-#include "p9.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-static void *(*ppmalloc)(size_t) = malloc;
-static void (*ppfree)(void *) = free;
-
-void toml_set_memutil(void *(*xxmalloc)(size_t), void (*xxfree)(void *)) {
-  if (xxmalloc)
-    ppmalloc = xxmalloc;
-  if (xxfree)
-    ppfree = xxfree;
-}
-
-#define ALIGN8(sz) (((sz) + 7) & ~7)
-#define MALLOC(a) ppmalloc(a)
-#define FREE(a) ppfree(a)
-
-#define malloc(x) error - forbidden - use MALLOC instead
-#define free(x) error - forbidden - use FREE instead
-#define calloc(x, y) error - forbidden - use CALLOC instead
-
-static void *CALLOC(size_t nmemb, size_t sz) {
-  int nb = ALIGN8(sz) * nmemb;
-  void *p = MALLOC(nb);
-  if (p) {
-    memset(p, 0, nb);
-  }
-  return p;
-}
-
-// some old platforms define strdup macro -- drop it.
-#undef strdup
-#define strdup(x) error - forbidden - use STRDUP instead
-
-static char *STRDUP(const char *s) {
-  int len = strlen(s);
-  char *p = MALLOC(len + 1);
-  if (p) {
-    memcpy(p, s, len);
-    p[len] = 0;
-  }
-  return p;
-}
-
-// some old platforms define strndup macro -- drop it.
-#undef strndup
-#define strndup(x) error - forbiden - use STRNDUP instead
-
-static char *STRNDUP(const char *s, size_t n) {
-  size_t len = strnlen(s, n);
-  char *p = MALLOC(len + 1);
-  if (p) {
-    memcpy(p, s, len);
-    p[len] = 0;
-  }
-  return p;
-}
-
-/**
- * Convert a char in utf8 into UCS, and store it in *ret.
- * Return #bytes consumed or -1 on failure.
- */
-int toml_utf8_to_ucs(const char *orig, int len, int64_t *ret) {
-  const unsigned char *buf = (const unsigned char *)orig;
-  unsigned i = *buf++;
-  int64_t v;
-
-  /* 0x00000000 - 0x0000007F:
-     0xxxxxxx
-  */
-  if (0 == (i >> 7)) {
-    if (len < 1)
-      return -1;
-    v = i;
-    return *ret = v, 1;
-  }
-  /* 0x00000080 - 0x000007FF:
-     110xxxxx 10xxxxxx
-  */
-  if (0x6 == (i >> 5)) {
-    if (len < 2)
-      return -1;
-    v = i & 0x1f;
-    for (int j = 0; j < 1; j++) {
-      i = *buf++;
-      if (0x2 != (i >> 6))
-        return -1;
-      v = (v << 6) | (i & 0x3f);
-    }
-    return *ret = v, (const char *)buf - orig;
-  }
-
-  /* 0x00000800 - 0x0000FFFF:
-     1110xxxx 10xxxxxx 10xxxxxx
-  */
-  if (0xE == (i >> 4)) {
-    if (len < 3)
-      return -1;
-    v = i & 0x0F;
-    for (int j = 0; j < 2; j++) {
-      i = *buf++;
-      if (0x2 != (i >> 6))
-        return -1;
-      v = (v << 6) | (i & 0x3f);
-    }
-    return *ret = v, (const char *)buf - orig;
-  }
-
-  /* 0x00010000 - 0x001FFFFF:
-     11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
-  */
-  if (0x1E == (i >> 3)) {
-    if (len < 4)
-      return -1;
-    v = i & 0x07;
-    for (int j = 0; j < 3; j++) {
-      i = *buf++;
-      if (0x2 != (i >> 6))
-        return -1;
-      v = (v << 6) | (i & 0x3f);
-    }
-    return *ret = v, (const char *)buf - orig;
-  }
-
-  /* 0x00200000 - 0x03FFFFFF:
-     111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
-  */
-  if (0x3E == (i >> 2)) {
-    if (len < 5)
-      return -1;
-    v = i & 0x03;
-    for (int j = 0; j < 4; j++) {
-      i = *buf++;
-      if (0x2 != (i >> 6))
-        return -1;
-      v = (v << 6) | (i & 0x3f);
-    }
-    return *ret = v, (const char *)buf - orig;
-  }
-
-  /* 0x04000000 - 0x7FFFFFFF:
-     1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
-  */
-  if (0x7e == (i >> 1)) {
-    if (len < 6)
-      return -1;
-    v = i & 0x01;
-    for (int j = 0; j < 5; j++) {
-      i = *buf++;
-      if (0x2 != (i >> 6))
-        return -1;
-      v = (v << 6) | (i & 0x3f);
-    }
-    return *ret = v, (const char *)buf - orig;
-  }
-  return -1;
-}
-
-/**
- *	Convert a UCS char to utf8 code, and return it in buf.
- *	Return #bytes used in buf to encode the char, or
- *	-1 on error.
- */
-int toml_ucs_to_utf8(int64_t code, char buf[6]) {
-  /* http://stackoverflow.com/questions/6240055/manually-converting-unicode-codepoints-into-utf-8-and-utf-16
-   */
-  /* The UCS code values 0xd800–0xdfff (UTF-16 surrogates) as well
-   * as 0xfffe and 0xffff (UCS noncharacters) should not appear in
-   * conforming UTF-8 streams.
-   */
-  if (0xd800 <= code && code <= 0xdfff)
-    return -1;
-  if (0xfffe <= code && code <= 0xffff)
-    return -1;
-
-  /* 0x00000000 - 0x0000007F:
-     0xxxxxxx
-  */
-  if (code < 0)
-    return -1;
-  if (code <= 0x7F) {
-    buf[0] = (unsigned char)code;
-    return 1;
-  }
-
-  /* 0x00000080 - 0x000007FF:
-     110xxxxx 10xxxxxx
-  */
-  if (code <= 0x000007FF) {
-    buf[0] = (unsigned char) (0xc0 | (code >> 6));
-    buf[1] = (unsigned char) (0x80 | (code & 0x3f));
-    return 2;
-  }
-
-  /* 0x00000800 - 0x0000FFFF:
-     1110xxxx 10xxxxxx 10xxxxxx
-  */
-  if (code <= 0x0000FFFF) {
-    buf[0] = (unsigned char) (0xe0 | (code >> 12));
-    buf[1] = (unsigned char) (0x80 | ((code >> 6) & 0x3f));
-    buf[2] = (unsigned char) (0x80 | (code & 0x3f));
-    return 3;
-  }
-
-  /* 0x00010000 - 0x001FFFFF:
-     11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
-  */
-  if (code <= 0x001FFFFF) {
-    buf[0] = (unsigned char) (0xf0 | (code >> 18));
-    buf[1] = (unsigned char) (0x80 | ((code >> 12) & 0x3f));
-    buf[2] = (unsigned char) (0x80 | ((code >> 6) & 0x3f));
-    buf[3] = (unsigned char) (0x80 | (code & 0x3f));
-    return 4;
-  }
-
-  /* 0x00200000 - 0x03FFFFFF:
-     111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
-  */
-  if (code <= 0x03FFFFFF) {
-    buf[0] = (unsigned char) (0xf8 | (code >> 24));
-    buf[1] = (unsigned char) (0x80 | ((code >> 18) & 0x3f));
-    buf[2] = (unsigned char) (0x80 | ((code >> 12) & 0x3f));
-    buf[3] = (unsigned char) (0x80 | ((code >> 6) & 0x3f));
-    buf[4] = (unsigned char) (0x80 | (code & 0x3f));
-    return 5;
-  }
-
-  /* 0x04000000 - 0x7FFFFFFF:
-     1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
-  */
-  if (code <= 0x7FFFFFFF) {
-    buf[0] = (unsigned char) (0xfc | (code >> 30));
-    buf[1] = (unsigned char) (0x80 | ((code >> 24) & 0x3f));
-    buf[2] = (unsigned char) (0x80 | ((code >> 18) & 0x3f));
-    buf[3] = (unsigned char) (0x80 | ((code >> 12) & 0x3f));
-    buf[4] = (unsigned char) (0x80 | ((code >> 6) & 0x3f));
-    buf[5] = (unsigned char) (0x80 | (code & 0x3f));
-    return 6;
-  }
-
-  return -1;
-}
-
-/*
- *	TOML has 3 data structures: value, array, table.
- *	Each of them can have identification key.
- */
-typedef struct toml_keyval_t toml_keyval_t;
-struct toml_keyval_t {
-  const char *key; /* key to this value */
-  const char *val; /* the raw value */
-};
-
-typedef struct toml_arritem_t toml_arritem_t;
-struct toml_arritem_t {
-  int valtype; /* for value kind: 'i'nt, 'd'ouble, 'b'ool, 's'tring, 't'ime,
-                  'D'ate, 'T'imestamp */
-  char *val;
-  toml_array_t *arr;
-  toml_table_t *tab;
-};
-
-struct toml_array_t {
-  const char *key; /* key to this array */
-  int kind;        /* element kind: 'v'alue, 'a'rray, or 't'able, 'm'ixed */
-  int type;        /* for value kind: 'i'nt, 'd'ouble, 'b'ool, 's'tring, 't'ime,
-                      'D'ate, 'T'imestamp, 'm'ixed */
-
-  int nitem; /* number of elements */
-  toml_arritem_t *item;
-};
-
-struct toml_table_t {
-  const char *key; /* key to this table */
-  bool implicit;   /* table was created implicitly */
-  bool readonly;   /* no more modification allowed */
-
-  /* key-values in the table */
-  int nkval;
-  toml_keyval_t **kval;
-
-  /* arrays in the table */
-  int narr;
-  toml_array_t **arr;
-
-  /* tables in the table */
-  int ntab;
-  toml_table_t **tab;
-};
-
-static inline void xfree(const void *x) {
-  if (x)
-    FREE((void *)(intptr_t)x);
-}
-
-enum tokentype_t {
-  INVALID,
-  DOT,
-  COMMA,
-  EQUAL,
-  LBRACE,
-  RBRACE,
-  NEWLINE,
-  LBRACKET,
-  RBRACKET,
-  STRING,
-};
-typedef enum tokentype_t tokentype_t;
-
-typedef struct token_t token_t;
-struct token_t {
-  tokentype_t tok;
-  int lineno;
-  char *ptr; /* points into context->start */
-  int len;
-  int eof;
-};
-
-typedef struct context_t context_t;
-struct context_t {
-  char *start;
-  char *stop;
-  char *errbuf;
-  int errbufsz;
-
-  token_t tok;
-  toml_table_t *root;
-  toml_table_t *curtab;
-
-  struct {
-    int top;
-    char *key[10];
-    token_t tok[10];
-  } tpath;
-};
-
-#define STRINGIFY(x) #x
-#define TOSTRING(x) STRINGIFY(x)
-#define FLINE __FILE__ ":" TOSTRING(__LINE__)
-
-static int next_token(context_t *ctx, int dotisspecial);
-
-/*
-  Error reporting. Call when an error is detected. Always return -1.
-*/
-static int e_outofmemory(context_t *ctx, const char *fline) {
-  snprintf(ctx->errbuf, ctx->errbufsz, "ERROR: out of memory (%s)", fline);
-  return -1;
-}
-
-static int e_internal(context_t *ctx, const char *fline) {
-  snprintf(ctx->errbuf, ctx->errbufsz, "internal error (%s)", fline);
-  return -1;
-}
-
-static int e_syntax(context_t *ctx, int lineno, const char *msg) {
-  snprintf(ctx->errbuf, ctx->errbufsz, "line %d: %s", lineno, msg);
-  return -1;
-}
-
-static int e_badkey(context_t *ctx, int lineno) {
-  snprintf(ctx->errbuf, ctx->errbufsz, "line %d: bad key", lineno);
-  return -1;
-}
-
-static int e_keyexists(context_t *ctx, int lineno) {
-  snprintf(ctx->errbuf, ctx->errbufsz, "line %d: key exists", lineno);
-  return -1;
-}
-
-static int e_forbid(context_t *ctx, int lineno, const char *msg) {
-  snprintf(ctx->errbuf, ctx->errbufsz, "line %d: %s", lineno, msg);
-  return -1;
-}
-
-static void *expand(void *p, int sz, int newsz) {
-  void *s = MALLOC(newsz);
-  if (!s)
-    return 0;
-
-  if (p) {
-    memcpy(s, p, sz);
-    FREE(p);
-  }
-  return s;
-}
-
-static void **expand_ptrarr(void **p, int n) {
-  void **s = MALLOC((n + 1) * sizeof(void *));
-  if (!s)
-    return 0;
-
-  s[n] = 0;
-  if (p) {
-    memcpy(s, p, n * sizeof(void *));
-    FREE(p);
-  }
-  return s;
-}
-
-static toml_arritem_t *expand_arritem(toml_arritem_t *p, int n) {
-  toml_arritem_t *pp = expand(p, n * sizeof(*p), (n + 1) * sizeof(*p));
-  if (!pp)
-    return 0;
-
-  memset(&pp[n], 0, sizeof(pp[n]));
-  return pp;
-}
-
-static char *norm_lit_str(const char *src, int srclen, int multiline,
-                          char *errbuf, int errbufsz) {
-  char *dst = 0; /* will write to dst[] and return it */
-  int max = 0;   /* max size of dst[] */
-  int off = 0;   /* cur offset in dst[] */
-  const char *sp = src;
-  const char *sq = src + srclen;
-  int ch;
-
-  /* scan forward on src */
-  for (;;) {
-    if (off >= max - 10) { /* have some slack for misc stuff */
-      int newmax = max + 50;
-      char *x = expand(dst, max, newmax);
-      if (!x) {
-        xfree(dst);
-        snprintf(errbuf, errbufsz, "out of memory");
-        return 0;
-      }
-      dst = x;
-      max = newmax;
-    }
-
-    /* finished? */
-    if (sp >= sq)
-      break;
-
-    ch = *sp++;
-    /* control characters other than tab is not allowed */
-    if ((0 <= ch && ch <= 0x08) || (0x0a <= ch && ch <= 0x1f) || (ch == 0x7f)) {
-      if (!(multiline && (ch == '\r' || ch == '\n'))) {
-        xfree(dst);
-        snprintf(errbuf, errbufsz, "invalid char U+%04x", ch);
-        return 0;
-      }
-    }
-
-    // a plain copy suffice
-    dst[off++] = ch;
-  }
-
-  dst[off++] = 0;
-  return dst;
-}
-
-/*
- * Convert src to raw unescaped utf-8 string.
- * Returns NULL if error with errmsg in errbuf.
- */
-static char *norm_basic_str(const char *src, int srclen, int multiline,
-                            char *errbuf, int errbufsz) {
-  char *dst = 0; /* will write to dst[] and return it */
-  int max = 0;   /* max size of dst[] */
-  int off = 0;   /* cur offset in dst[] */
-  const char *sp = src;
-  const char *sq = src + srclen;
-  int ch;
-
-  /* scan forward on src */
-  for (;;) {
-    if (off >= max - 10) { /* have some slack for misc stuff */
-      int newmax = max + 50;
-      char *x = expand(dst, max, newmax);
-      if (!x) {
-        xfree(dst);
-        snprintf(errbuf, errbufsz, "out of memory");
-        return 0;
-      }
-      dst = x;
-      max = newmax;
-    }
-
-    /* finished? */
-    if (sp >= sq)
-      break;
-
-    ch = *sp++;
-    if (ch != '\\') {
-      /* these chars must be escaped: U+0000 to U+0008, U+000A to U+001F, U+007F
-       */
-      if ((0 <= ch && ch <= 0x08) || (0x0a <= ch && ch <= 0x1f) ||
-          (ch == 0x7f)) {
-        if (!(multiline && (ch == '\r' || ch == '\n'))) {
-          xfree(dst);
-          snprintf(errbuf, errbufsz, "invalid char U+%04x", ch);
-          return 0;
-        }
-      }
-
-      // a plain copy suffice
-      dst[off++] = ch;
-      continue;
-    }
-
-    /* ch was backslash. we expect the escape char. */
-    if (sp >= sq) {
-      snprintf(errbuf, errbufsz, "last backslash is invalid");
-      xfree(dst);
-      return 0;
-    }
-
-    /* for multi-line, we want to kill line-ending-backslash ... */
-    if (multiline) {
-
-      // if there is only whitespace after the backslash ...
-      if (sp[strspn(sp, " \t\r")] == '\n') {
-        /* skip all the following whitespaces */
-        sp += strspn(sp, " \t\r\n");
-        continue;
-      }
-    }
-
-    /* get the escaped char */
-    ch = *sp++;
-    switch (ch) {
-    case 'u':
-    case 'U': {
-      int64_t ucs = 0;
-      int nhex = (ch == 'u' ? 4 : 8);
-      for (int i = 0; i < nhex; i++) {
-        if (sp >= sq) {
-          snprintf(errbuf, errbufsz, "\\%c expects %d hex chars", ch, nhex);
-          xfree(dst);
-          return 0;
-        }
-        ch = *sp++;
-        int v = ('0' <= ch && ch <= '9')
-                    ? ch - '0'
-                    : (('A' <= ch && ch <= 'F') ? ch - 'A' + 10 : -1);
-        if (-1 == v) {
-          snprintf(errbuf, errbufsz, "invalid hex chars for \\u or \\U");
-          xfree(dst);
-          return 0;
-        }
-        ucs = ucs * 16 + v;
-      }
-      int n = toml_ucs_to_utf8(ucs, &dst[off]);
-      if (-1 == n) {
-        snprintf(errbuf, errbufsz, "illegal ucs code in \\u or \\U");
-        xfree(dst);
-        return 0;
-      }
-      off += n;
-    }
-      continue;
-
-    case 'b':
-      ch = '\b';
-      break;
-    case 't':
-      ch = '\t';
-      break;
-    case 'n':
-      ch = '\n';
-      break;
-    case 'f':
-      ch = '\f';
-      break;
-    case 'r':
-      ch = '\r';
-      break;
-    case '"':
-      ch = '"';
-      break;
-    case '\\':
-      ch = '\\';
-      break;
-    default:
-      snprintf(errbuf, errbufsz, "illegal escape char \\%c", ch);
-      xfree(dst);
-      return 0;
-    }
-
-    dst[off++] = ch;
-  }
-
-  // Cap with NUL and return it.
-  dst[off++] = 0;
-  return dst;
-}
-
-/* Normalize a key. Convert all special chars to raw unescaped utf-8 chars. */
-static char *normalize_key(context_t *ctx, token_t strtok) {
-  const char *sp = strtok.ptr;
-  const char *sq = strtok.ptr + strtok.len;
-  int lineno = strtok.lineno;
-  char *ret;
-  int ch = *sp;
-  char ebuf[80];
-
-  /* handle quoted string */
-  if (ch == '\'' || ch == '\"') {
-    /* if ''' or """, take 3 chars off front and back. Else, take 1 char off. */
-    int multiline = 0;
-    if (sp[1] == ch && sp[2] == ch) {
-      sp += 3, sq -= 3;
-      multiline = 1;
-    } else
-      sp++, sq--;
-
-    if (ch == '\'') {
-      /* for single quote, take it verbatim. */
-      if (!(ret = STRNDUP(sp, sq - sp))) {
-        e_outofmemory(ctx, FLINE);
-        return 0;
-      }
-    } else {
-      /* for double quote, we need to normalize */
-      ret = norm_basic_str(sp, sq - sp, multiline, ebuf, sizeof(ebuf));
-      if (!ret) {
-        e_syntax(ctx, lineno, ebuf);
-        return 0;
-      }
-    }
-
-    /* newlines are not allowed in keys */
-    if (strchr(ret, '\n')) {
-      xfree(ret);
-      e_badkey(ctx, lineno);
-      return 0;
-    }
-    return ret;
-  }
-
-  /* for bare-key allow only this regex: [A-Za-z0-9_-]+ */
-  const char *xp;
-  for (xp = sp; xp != sq; xp++) {
-    int k = *xp;
-    if (isalnum(k))
-      continue;
-    if (k == '_' || k == '-')
-      continue;
-    e_badkey(ctx, lineno);
-    return 0;
-  }
-
-  /* dup and return it */
-  if (!(ret = STRNDUP(sp, sq - sp))) {
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  return ret;
-}
-
-/*
- * Look up key in tab. Return 0 if not found, or
- * 'v'alue, 'a'rray or 't'able depending on the element.
- */
-static int check_key(toml_table_t *tab, const char *key,
-                     toml_keyval_t **ret_val, toml_array_t **ret_arr,
-                     toml_table_t **ret_tab) {
-  int i;
-  void *dummy;
-
-  if (!ret_tab)
-    ret_tab = (toml_table_t **)&dummy;
-  if (!ret_arr)
-    ret_arr = (toml_array_t **)&dummy;
-  if (!ret_val)
-    ret_val = (toml_keyval_t **)&dummy;
-
-  *ret_tab = 0;
-  *ret_arr = 0;
-  *ret_val = 0;
-
-  for (i = 0; i < tab->nkval; i++) {
-    if (0 == strcmp(key, tab->kval[i]->key)) {
-      *ret_val = tab->kval[i];
-      return 'v';
-    }
-  }
-  for (i = 0; i < tab->narr; i++) {
-    if (0 == strcmp(key, tab->arr[i]->key)) {
-      *ret_arr = tab->arr[i];
-      return 'a';
-    }
-  }
-  for (i = 0; i < tab->ntab; i++) {
-    if (0 == strcmp(key, tab->tab[i]->key)) {
-      *ret_tab = tab->tab[i];
-      return 't';
-    }
-  }
-  return 0;
-}
-
-static int key_kind(toml_table_t *tab, const char *key) {
-  return check_key(tab, key, 0, 0, 0);
-}
-
-/* Create a keyval in the table.
- */
-static toml_keyval_t *create_keyval_in_table(context_t *ctx, toml_table_t *tab,
-                                             token_t keytok) {
-  /* first, normalize the key to be used for lookup.
-   * remember to free it if we error out.
-   */
-  char *newkey = normalize_key(ctx, keytok);
-  if (!newkey)
-    return 0;
-
-  /* if key exists: error out. */
-  toml_keyval_t *dest = 0;
-  if (key_kind(tab, newkey)) {
-    xfree(newkey);
-    e_keyexists(ctx, keytok.lineno);
-    return 0;
-  }
-
-  /* make a new entry */
-  int n = tab->nkval;
-  toml_keyval_t **base;
-  if (0 == (base = (toml_keyval_t **)expand_ptrarr((void **)tab->kval, n))) {
-    xfree(newkey);
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  tab->kval = base;
-
-  if (0 == (base[n] = (toml_keyval_t *)CALLOC(1, sizeof(*base[n])))) {
-    xfree(newkey);
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  dest = tab->kval[tab->nkval++];
-
-  /* save the key in the new value struct */
-  dest->key = newkey;
-  return dest;
-}
-
-/* Create a table in the table.
- */
-static toml_table_t *create_keytable_in_table(context_t *ctx, toml_table_t *tab,
-                                              token_t keytok) {
-  /* first, normalize the key to be used for lookup.
-   * remember to free it if we error out.
-   */
-  char *newkey = normalize_key(ctx, keytok);
-  if (!newkey)
-    return 0;
-
-  /* if key exists: error out */
-  toml_table_t *dest = 0;
-  if (check_key(tab, newkey, 0, 0, &dest)) {
-    xfree(newkey); /* don't need this anymore */
-
-    /* special case: if table exists, but was created implicitly ... */
-    if (dest && dest->implicit) {
-      /* we make it explicit now, and simply return it. */
-      dest->implicit = false;
-      return dest;
-    }
-    e_keyexists(ctx, keytok.lineno);
-    return 0;
-  }
-
-  /* create a new table entry */
-  int n = tab->ntab;
-  toml_table_t **base;
-  if (0 == (base = (toml_table_t **)expand_ptrarr((void **)tab->tab, n))) {
-    xfree(newkey);
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  tab->tab = base;
-
-  if (0 == (base[n] = (toml_table_t *)CALLOC(1, sizeof(*base[n])))) {
-    xfree(newkey);
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  dest = tab->tab[tab->ntab++];
-
-  /* save the key in the new table struct */
-  dest->key = newkey;
-  return dest;
-}
-
-/* Create an array in the table.
- */
-static toml_array_t *create_keyarray_in_table(context_t *ctx, toml_table_t *tab,
-                                              token_t keytok, char kind) {
-  /* first, normalize the key to be used for lookup.
-   * remember to free it if we error out.
-   */
-  char *newkey = normalize_key(ctx, keytok);
-  if (!newkey)
-    return 0;
-
-  /* if key exists: error out */
-  if (key_kind(tab, newkey)) {
-    xfree(newkey); /* don't need this anymore */
-    e_keyexists(ctx, keytok.lineno);
-    return 0;
-  }
-
-  /* make a new array entry */
-  int n = tab->narr;
-  toml_array_t **base;
-  if (0 == (base = (toml_array_t **)expand_ptrarr((void **)tab->arr, n))) {
-    xfree(newkey);
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  tab->arr = base;
-
-  if (0 == (base[n] = (toml_array_t *)CALLOC(1, sizeof(*base[n])))) {
-    xfree(newkey);
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  toml_array_t *dest = tab->arr[tab->narr++];
-
-  /* save the key in the new array struct */
-  dest->key = newkey;
-  dest->kind = kind;
-  return dest;
-}
-
-static toml_arritem_t *create_value_in_array(context_t *ctx,
-                                             toml_array_t *parent) {
-  const int n = parent->nitem;
-  toml_arritem_t *base = expand_arritem(parent->item, n);
-  if (!base) {
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  parent->item = base;
-  parent->nitem++;
-  return &parent->item[n];
-}
-
-/* Create an array in an array
- */
-static toml_array_t *create_array_in_array(context_t *ctx,
-                                           toml_array_t *parent) {
-  const int n = parent->nitem;
-  toml_arritem_t *base = expand_arritem(parent->item, n);
-  if (!base) {
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  toml_array_t *ret = (toml_array_t *)CALLOC(1, sizeof(toml_array_t));
-  if (!ret) {
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  base[n].arr = ret;
-  parent->item = base;
-  parent->nitem++;
-  return ret;
-}
-
-/* Create a table in an array
- */
-static toml_table_t *create_table_in_array(context_t *ctx,
-                                           toml_array_t *parent) {
-  int n = parent->nitem;
-  toml_arritem_t *base = expand_arritem(parent->item, n);
-  if (!base) {
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  toml_table_t *ret = (toml_table_t *)CALLOC(1, sizeof(toml_table_t));
-  if (!ret) {
-    e_outofmemory(ctx, FLINE);
-    return 0;
-  }
-  base[n].tab = ret;
-  parent->item = base;
-  parent->nitem++;
-  return ret;
-}
-
-static int skip_newlines(context_t *ctx, int isdotspecial) {
-  while (ctx->tok.tok == NEWLINE) {
-    if (next_token(ctx, isdotspecial))
-      return -1;
-    if (ctx->tok.eof)
-      break;
-  }
-  return 0;
-}
-
-static int parse_keyval(context_t *ctx, toml_table_t *tab);
-
-static inline int eat_token(context_t *ctx, tokentype_t typ, int isdotspecial,
-                            const char *fline) {
-  if (ctx->tok.tok != typ)
-    return e_internal(ctx, fline);
-
-  if (next_token(ctx, isdotspecial))
-    return -1;
-
-  return 0;
-}
-
-/* We are at '{ ... }'.
- * Parse the table.
- */
-static int parse_inline_table(context_t *ctx, toml_table_t *tab) {
-  if (eat_token(ctx, LBRACE, 1, FLINE))
-    return -1;
-
-  for (;;) {
-    if (ctx->tok.tok == NEWLINE)
-      return e_syntax(ctx, ctx->tok.lineno,
-                      "newline not allowed in inline table");
-
-    /* until } */
-    if (ctx->tok.tok == RBRACE)
-      break;
-
-    if (ctx->tok.tok != STRING)
-      return e_syntax(ctx, ctx->tok.lineno, "expect a string");
-
-    if (parse_keyval(ctx, tab))
-      return -1;
-
-    if (ctx->tok.tok == NEWLINE)
-      return e_syntax(ctx, ctx->tok.lineno,
-                      "newline not allowed in inline table");
-
-    /* on comma, continue to scan for next keyval */
-    if (ctx->tok.tok == COMMA) {
-      if (eat_token(ctx, COMMA, 1, FLINE))
-        return -1;
-      continue;
-    }
-    break;
-  }
-
-  if (eat_token(ctx, RBRACE, 1, FLINE))
-    return -1;
-
-  tab->readonly = 1;
-
-  return 0;
-}
-
-static int valtype(const char *val) {
-  toml_timestamp_t ts;
-  if (*val == '\'' || *val == '"')
-    return 's';
-  if (0 == toml_rtob(val, 0))
-    return 'b';
-  if (0 == toml_rtoi(val, 0))
-    return 'i';
-  if (0 == toml_rtod(val, 0))
-    return 'd';
-  if (0 == toml_rtots(val, &ts)) {
-    if (ts.year && ts.hour)
-      return 'T'; /* timestamp */
-    if (ts.year)
-      return 'D'; /* date */
-    return 't';   /* time */
-  }
-  return 'u'; /* unknown */
-}
-
-/* We are at '[...]' */
-static int parse_array(context_t *ctx, toml_array_t *arr) {
-  if (eat_token(ctx, LBRACKET, 0, FLINE))
-    return -1;
-
-  for (;;) {
-    if (skip_newlines(ctx, 0))
-      return -1;
-
-    /* until ] */
-    if (ctx->tok.tok == RBRACKET)
-      break;
-
-    switch (ctx->tok.tok) {
-    case STRING: {
-      /* set array kind if this will be the first entry */
-      if (arr->kind == 0)
-        arr->kind = 'v';
-      else if (arr->kind != 'v')
-        arr->kind = 'm';
-
-      char *val = ctx->tok.ptr;
-      int vlen = ctx->tok.len;
-
-      /* make a new value in array */
-      toml_arritem_t *newval = create_value_in_array(ctx, arr);
-      if (!newval)
-        return e_outofmemory(ctx, FLINE);
-
-      if (!(newval->val = STRNDUP(val, vlen)))
-        return e_outofmemory(ctx, FLINE);
-
-      newval->valtype = valtype(newval->val);
-
-      /* set array type if this is the first entry */
-      if (arr->nitem == 1)
-        arr->type = newval->valtype;
-      else if (arr->type != newval->valtype)
-        arr->type = 'm'; /* mixed */
-
-      if (eat_token(ctx, STRING, 0, FLINE))
-        return -1;
-      break;
-    }
-
-    case LBRACKET: { /* [ [array], [array] ... ] */
-      /* set the array kind if this will be the first entry */
-      if (arr->kind == 0)
-        arr->kind = 'a';
-      else if (arr->kind != 'a')
-        arr->kind = 'm';
-
-      toml_array_t *subarr = create_array_in_array(ctx, arr);
-      if (!subarr)
-        return -1;
-      if (parse_array(ctx, subarr))
-        return -1;
-      break;
-    }
-
-    case LBRACE: { /* [ {table}, {table} ... ] */
-      /* set the array kind if this will be the first entry */
-      if (arr->kind == 0)
-        arr->kind = 't';
-      else if (arr->kind != 't')
-        arr->kind = 'm';
-
-      toml_table_t *subtab = create_table_in_array(ctx, arr);
-      if (!subtab)
-        return -1;
-      if (parse_inline_table(ctx, subtab))
-        return -1;
-      break;
-    }
-
-    default:
-      return e_syntax(ctx, ctx->tok.lineno, "syntax error");
-    }
-
-    if (skip_newlines(ctx, 0))
-      return -1;
-
-    /* on comma, continue to scan for next element */
-    if (ctx->tok.tok == COMMA) {
-      if (eat_token(ctx, COMMA, 0, FLINE))
-        return -1;
-      continue;
-    }
-    break;
-  }
-
-  if (eat_token(ctx, RBRACKET, 1, FLINE))
-    return -1;
-  return 0;
-}
-
-/* handle lines like these:
-   key = "value"
-   key = [ array ]
-   key = { table }
-*/
-static int parse_keyval(context_t *ctx, toml_table_t *tab) {
-  if (tab->readonly) {
-    return e_forbid(ctx, ctx->tok.lineno,
-                    "cannot insert new entry into existing table");
-  }
-
-  token_t key = ctx->tok;
-  if (eat_token(ctx, STRING, 1, FLINE))
-    return -1;
-
-  if (ctx->tok.tok == DOT) {
-    /* handle inline dotted key.
-       e.g.
-       physical.color = "orange"
-       physical.shape = "round"
-    */
-    toml_table_t *subtab = 0;
-    {
-      char *subtabstr = normalize_key(ctx, key);
-      if (!subtabstr)
-        return -1;
-
-      subtab = toml_table_in(tab, subtabstr);
-      xfree(subtabstr);
-    }
-    if (!subtab) {
-      subtab = create_keytable_in_table(ctx, tab, key);
-      if (!subtab)
-        return -1;
-    }
-    if (next_token(ctx, 1))
-      return -1;
-    if (parse_keyval(ctx, subtab))
-      return -1;
-    return 0;
-  }
-
-  if (ctx->tok.tok != EQUAL) {
-    return e_syntax(ctx, ctx->tok.lineno, "missing =");
-  }
-
-  if (next_token(ctx, 0))
-    return -1;
-
-  switch (ctx->tok.tok) {
-  case STRING: { /* key = "value" */
-    toml_keyval_t *keyval = create_keyval_in_table(ctx, tab, key);
-    if (!keyval)
-      return -1;
-    token_t val = ctx->tok;
-
-    assert(keyval->val == 0);
-    if (!(keyval->val = STRNDUP(val.ptr, val.len)))
-      return e_outofmemory(ctx, FLINE);
-
-    if (next_token(ctx, 1))
-      return -1;
-
-    return 0;
-  }
-
-  case LBRACKET: { /* key = [ array ] */
-    toml_array_t *arr = create_keyarray_in_table(ctx, tab, key, 0);
-    if (!arr)
-      return -1;
-    if (parse_array(ctx, arr))
-      return -1;
-    return 0;
-  }
-
-  case LBRACE: { /* key = { table } */
-    toml_table_t *nxttab = create_keytable_in_table(ctx, tab, key);
-    if (!nxttab)
-      return -1;
-    if (parse_inline_table(ctx, nxttab))
-      return -1;
-    return 0;
-  }
-
-  default:
-    return e_syntax(ctx, ctx->tok.lineno, "syntax error");
-  }
-  return 0;
-}
-
-typedef struct tabpath_t tabpath_t;
-struct tabpath_t {
-  int cnt;
-  token_t key[10];
-};
-
-/* at [x.y.z] or [[x.y.z]]
- * Scan forward and fill tabpath until it enters ] or ]]
- * There will be at least one entry on return.
- */
-static int fill_tabpath(context_t *ctx) {
-  int lineno = ctx->tok.lineno;
-  int i;
-
-  /* clear tpath */
-  for (i = 0; i < ctx->tpath.top; i++) {
-    char **p = &ctx->tpath.key[i];
-    xfree(*p);
-    *p = 0;
-  }
-  ctx->tpath.top = 0;
-
-  for (;;) {
-    if (ctx->tpath.top >= 10)
-      return e_syntax(ctx, lineno,
-                      "table path is too deep; max allowed is 10.");
-
-    if (ctx->tok.tok != STRING)
-      return e_syntax(ctx, lineno, "invalid or missing key");
-
-    char *key = normalize_key(ctx, ctx->tok);
-    if (!key)
-      return -1;
-    ctx->tpath.tok[ctx->tpath.top] = ctx->tok;
-    ctx->tpath.key[ctx->tpath.top] = key;
-    ctx->tpath.top++;
-
-    if (next_token(ctx, 1))
-      return -1;
-
-    if (ctx->tok.tok == RBRACKET)
-      break;
-
-    if (ctx->tok.tok != DOT)
-      return e_syntax(ctx, lineno, "invalid key");
-
-    if (next_token(ctx, 1))
-      return -1;
-  }
-
-  if (ctx->tpath.top <= 0)
-    return e_syntax(ctx, lineno, "empty table selector");
-
-  return 0;
-}
-
-/* Walk tabpath from the root, and create new tables on the way.
- * Sets ctx->curtab to the final table.
- */
-static int walk_tabpath(context_t *ctx) {
-  /* start from root */
-  toml_table_t *curtab = ctx->root;
-
-  for (int i = 0; i < ctx->tpath.top; i++) {
-    const char *key = ctx->tpath.key[i];
-
-    toml_keyval_t *nextval = 0;
-    toml_array_t *nextarr = 0;
-    toml_table_t *nexttab = 0;
-    switch (check_key(curtab, key, &nextval, &nextarr, &nexttab)) {
-    case 't':
-      /* found a table. nexttab is where we will go next. */
-      break;
-
-    case 'a':
-      /* found an array. nexttab is the last table in the array. */
-      if (nextarr->kind != 't')
-        return e_internal(ctx, FLINE);
-
-      if (nextarr->nitem == 0)
-        return e_internal(ctx, FLINE);
-
-      nexttab = nextarr->item[nextarr->nitem - 1].tab;
-      break;
-
-    case 'v':
-      return e_keyexists(ctx, ctx->tpath.tok[i].lineno);
-
-    default: { /* Not found. Let's create an implicit table. */
-      int n = curtab->ntab;
-      toml_table_t **base =
-          (toml_table_t **)expand_ptrarr((void **)curtab->tab, n);
-      if (0 == base)
-        return e_outofmemory(ctx, FLINE);
-
-      curtab->tab = base;
-
-      if (0 == (base[n] = (toml_table_t *)CALLOC(1, sizeof(*base[n]))))
-        return e_outofmemory(ctx, FLINE);
-
-      if (0 == (base[n]->key = STRDUP(key)))
-        return e_outofmemory(ctx, FLINE);
-
-      nexttab = curtab->tab[curtab->ntab++];
-
-      /* tabs created by walk_tabpath are considered implicit */
-      nexttab->implicit = true;
-    } break;
-    }
-
-    /* switch to next tab */
-    curtab = nexttab;
-  }
-
-  /* save it */
-  ctx->curtab = curtab;
-
-  return 0;
-}
-
-/* handle lines like [x.y.z] or [[x.y.z]] */
-static int parse_select(context_t *ctx) {
-  assert(ctx->tok.tok == LBRACKET);
-
-  /* true if [[ */
-  int llb = (ctx->tok.ptr + 1 < ctx->stop && ctx->tok.ptr[1] == '[');
-  /* need to detect '[[' on our own because next_token() will skip whitespace,
-     and '[ [' would be taken as '[[', which is wrong. */
-
-  /* eat [ or [[ */
-  if (eat_token(ctx, LBRACKET, 1, FLINE))
-    return -1;
-  if (llb) {
-    assert(ctx->tok.tok == LBRACKET);
-    if (eat_token(ctx, LBRACKET, 1, FLINE))
-      return -1;
-  }
-
-  if (fill_tabpath(ctx))
-    return -1;
-
-  /* For [x.y.z] or [[x.y.z]], remove z from tpath.
-   */
-  token_t z = ctx->tpath.tok[ctx->tpath.top - 1];
-  xfree(ctx->tpath.key[ctx->tpath.top - 1]);
-  ctx->tpath.top--;
-
-  /* set up ctx->curtab */
-  if (walk_tabpath(ctx))
-    return -1;
-
-  if (!llb) {
-    /* [x.y.z] -> create z = {} in x.y */
-    toml_table_t *curtab = create_keytable_in_table(ctx, ctx->curtab, z);
-    if (!curtab)
-      return -1;
-    ctx->curtab = curtab;
-  } else {
-    /* [[x.y.z]] -> create z = [] in x.y */
-    toml_array_t *arr = 0;
-    {
-      char *zstr = normalize_key(ctx, z);
-      if (!zstr)
-        return -1;
-      arr = toml_array_in(ctx->curtab, zstr);
-      xfree(zstr);
-    }
-    if (!arr) {
-      arr = create_keyarray_in_table(ctx, ctx->curtab, z, 't');
-      if (!arr)
-        return -1;
-    }
-    if (arr->kind != 't')
-      return e_syntax(ctx, z.lineno, "array mismatch");
-
-    /* add to z[] */
-    toml_table_t *dest;
-    {
-      toml_table_t *t = create_table_in_array(ctx, arr);
-      if (!t)
-        return -1;
-
-      if (0 == (t->key = STRDUP("__anon__")))
-        return e_outofmemory(ctx, FLINE);
-
-      dest = t;
-    }
-
-    ctx->curtab = dest;
-  }
-
-  if (ctx->tok.tok != RBRACKET) {
-    return e_syntax(ctx, ctx->tok.lineno, "expects ]");
-  }
-  if (llb) {
-    if (!(ctx->tok.ptr + 1 < ctx->stop && ctx->tok.ptr[1] == ']')) {
-      return e_syntax(ctx, ctx->tok.lineno, "expects ]]");
-    }
-    if (eat_token(ctx, RBRACKET, 1, FLINE))
-      return -1;
-  }
-
-  if (eat_token(ctx, RBRACKET, 1, FLINE))
-    return -1;
-
-  if (ctx->tok.tok != NEWLINE)
-    return e_syntax(ctx, ctx->tok.lineno, "extra chars after ] or ]]");
-
-  return 0;
-}
-
-toml_table_t *toml_parse(char *conf, char *errbuf, int errbufsz) {
-  context_t ctx;
-
-  // clear errbuf
-  if (errbufsz <= 0)
-    errbufsz = 0;
-  if (errbufsz > 0)
-    errbuf[0] = 0;
-
-  // init context
-  memset(&ctx, 0, sizeof(ctx));
-  ctx.start = conf;
-  ctx.stop = ctx.start + strlen(conf);
-  ctx.errbuf = errbuf;
-  ctx.errbufsz = errbufsz;
-
-  // start with an artificial newline of length 0
-  ctx.tok.tok = NEWLINE;
-  ctx.tok.lineno = 1;
-  ctx.tok.ptr = conf;
-  ctx.tok.len = 0;
-
-  // make a root table
-  if (0 == (ctx.root = CALLOC(1, sizeof(*ctx.root)))) {
-    e_outofmemory(&ctx, FLINE);
-    // Do not goto fail, root table not set up yet
-    return 0;
-  }
-
-  // set root as default table
-  ctx.curtab = ctx.root;
-
-  /* Scan forward until EOF */
-  for (token_t tok = ctx.tok; !tok.eof; tok = ctx.tok) {
-    switch (tok.tok) {
-
-    case NEWLINE:
-      if (next_token(&ctx, 1))
-        goto fail;
-      break;
-
-    case STRING:
-      if (parse_keyval(&ctx, ctx.curtab))
-        goto fail;
-
-      if (ctx.tok.tok != NEWLINE) {
-        e_syntax(&ctx, ctx.tok.lineno, "extra chars after value");
-        goto fail;
-      }
-
-      if (eat_token(&ctx, NEWLINE, 1, FLINE))
-        goto fail;
-      break;
-
-    case LBRACKET: /* [ x.y.z ] or [[ x.y.z ]] */
-      if (parse_select(&ctx))
-        goto fail;
-      break;
-
-    default:
-      e_syntax(&ctx, tok.lineno, "syntax error");
-      goto fail;
-    }
-  }
-
-  /* success */
-  for (int i = 0; i < ctx.tpath.top; i++)
-    xfree(ctx.tpath.key[i]);
-  return ctx.root;
-
-fail:
-  // Something bad has happened. Free resources and return error.
-  for (int i = 0; i < ctx.tpath.top; i++)
-    xfree(ctx.tpath.key[i]);
-  toml_free(ctx.root);
-  return 0;
-}
-
-toml_table_t *toml_parse_file(FILE *fp, char *errbuf, int errbufsz) {
-  int bufsz = 0;
-  char *buf = 0;
-  int off = 0;
-
-  /* read from fp into buf */
-  while (!feof(fp)) {
-
-    if (off == bufsz) {
-      int xsz = bufsz + 1000;
-      char *x = expand(buf, bufsz, xsz);
-      if (!x) {
-        snprintf(errbuf, errbufsz, "out of memory");
-        xfree(buf);
-        return 0;
-      }
-      buf = x;
-      bufsz = xsz;
-    }
-
-    errno = 0;
-    int n = fread(buf + off, 1, bufsz - off, fp);
-    if (ferror(fp)) {
-      snprintf(errbuf, errbufsz, "%s",
-               errno ? strerror(errno) : "Error reading file");
-      xfree(buf);
-      return 0;
-    }
-    off += n;
-  }
-
-  /* tag on a NUL to cap the string */
-  if (off == bufsz) {
-    int xsz = bufsz + 1;
-    char *x = expand(buf, bufsz, xsz);
-    if (!x) {
-      snprintf(errbuf, errbufsz, "out of memory");
-      xfree(buf);
-      return 0;
-    }
-    buf = x;
-    bufsz = xsz;
-  }
-  buf[off] = 0;
-
-  /* parse it, cleanup and finish */
-  toml_table_t *ret = toml_parse(buf, errbuf, errbufsz);
-  xfree(buf);
-  return ret;
-}
-
-static void xfree_kval(toml_keyval_t *p) {
-  if (!p)
-    return;
-  xfree(p->key);
-  xfree(p->val);
-  xfree(p);
-}
-
-static void xfree_tab(toml_table_t *p);
-
-static void xfree_arr(toml_array_t *p) {
-  if (!p)
-    return;
-
-  xfree(p->key);
-  const int n = p->nitem;
-  for (int i = 0; i < n; i++) {
-    toml_arritem_t *a = &p->item[i];
-    if (a->val)
-      xfree(a->val);
-    else if (a->arr)
-      xfree_arr(a->arr);
-    else if (a->tab)
-      xfree_tab(a->tab);
-  }
-  xfree(p->item);
-  xfree(p);
-}
-
-static void xfree_tab(toml_table_t *p) {
-  int i;
-
-  if (!p)
-    return;
-
-  xfree(p->key);
-
-  for (i = 0; i < p->nkval; i++)
-    xfree_kval(p->kval[i]);
-  xfree(p->kval);
-
-  for (i = 0; i < p->narr; i++)
-    xfree_arr(p->arr[i]);
-  xfree(p->arr);
-
-  for (i = 0; i < p->ntab; i++)
-    xfree_tab(p->tab[i]);
-  xfree(p->tab);
-
-  xfree(p);
-}
-
-void toml_free(toml_table_t *tab) { xfree_tab(tab); }
-
-static void set_token(context_t *ctx, tokentype_t tok, int lineno, char *ptr,
-                      int len) {
-  token_t t;
-  t.tok = tok;
-  t.lineno = lineno;
-  t.ptr = ptr;
-  t.len = len;
-  t.eof = 0;
-  ctx->tok = t;
-}
-
-static void set_eof(context_t *ctx, int lineno) {
-  set_token(ctx, NEWLINE, lineno, ctx->stop, 0);
-  ctx->tok.eof = 1;
-}
-
-/* Scan p for n digits compositing entirely of [0-9] */
-static int scan_digits(const char *p, int n) {
-  int ret = 0;
-  for (; n > 0 && isdigit(*p); n--, p++) {
-    ret = 10 * ret + (*p - '0');
-  }
-  return n ? -1 : ret;
-}
-
-static int scan_date(const char *p, int *YY, int *MM, int *DD) {
-  int year, month, day;
-  year = scan_digits(p, 4);
-  month = (year >= 0 && p[4] == '-') ? scan_digits(p + 5, 2) : -1;
-  day = (month >= 0 && p[7] == '-') ? scan_digits(p + 8, 2) : -1;
-  if (YY)
-    *YY = year;
-  if (MM)
-    *MM = month;
-  if (DD)
-    *DD = day;
-  return (year >= 0 && month >= 0 && day >= 0) ? 0 : -1;
-}
-
-static int scan_time(const char *p, int *hh, int *mm, int *ss) {
-  int hour, minute, second;
-  hour = scan_digits(p, 2);
-  minute = (hour >= 0 && p[2] == ':') ? scan_digits(p + 3, 2) : -1;
-  second = (minute >= 0 && p[5] == ':') ? scan_digits(p + 6, 2) : -1;
-  if (hh)
-    *hh = hour;
-  if (mm)
-    *mm = minute;
-  if (ss)
-    *ss = second;
-  return (hour >= 0 && minute >= 0 && second >= 0) ? 0 : -1;
-}
-
-static int scan_string(context_t *ctx, char *p, int lineno, int dotisspecial) {
-  char *orig = p;
-  if (0 == strncmp(p, "'''", 3)) {
-    char *q = p + 3;
-
-    while (1) {
-      q = strstr(q, "'''");
-      if (0 == q) {
-        return e_syntax(ctx, lineno, "unterminated triple-s-quote");
-      }
-      while (q[3] == '\'')
-        q++;
-      break;
-    }
-
-    set_token(ctx, STRING, lineno, orig, q + 3 - orig);
-    return 0;
-  }
-
-  if (0 == strncmp(p, "\"\"\"", 3)) {
-    char *q = p + 3;
-
-    while (1) {
-      q = strstr(q, "\"\"\"");
-      if (0 == q) {
-        return e_syntax(ctx, lineno, "unterminated triple-d-quote");
-      }
-      if (q[-1] == '\\') {
-        q++;
-        continue;
-      }
-      while (q[3] == '\"')
-        q++;
-      break;
-    }
-
-    // the string is [p+3, q-1]
-
-    int hexreq = 0; /* #hex required */
-    int escape = 0;
-    for (p += 3; p < q; p++) {
-      if (escape) {
-        escape = 0;
-        if (strchr("btnfr\"\\", *p))
-          continue;
-        if (*p == 'u') {
-          hexreq = 4;
-          continue;
-        }
-        if (*p == 'U') {
-          hexreq = 8;
-          continue;
-        }
-        if (p[strspn(p, " \t\r")] == '\n')
-          continue; /* allow for line ending backslash */
-        return e_syntax(ctx, lineno, "bad escape char");
-      }
-      if (hexreq) {
-        hexreq--;
-        if (strchr("0123456789ABCDEF", *p))
-          continue;
-        return e_syntax(ctx, lineno, "expect hex char");
-      }
-      if (*p == '\\') {
-        escape = 1;
-        continue;
-      }
-    }
-    if (escape)
-      return e_syntax(ctx, lineno, "expect an escape char");
-    if (hexreq)
-      return e_syntax(ctx, lineno, "expected more hex char");
-
-    set_token(ctx, STRING, lineno, orig, q + 3 - orig);
-    return 0;
-  }
-
-  if ('\'' == *p) {
-    for (p++; *p && *p != '\n' && *p != '\''; p++)
-      ;
-    if (*p != '\'') {
-      return e_syntax(ctx, lineno, "unterminated s-quote");
-    }
-
-    set_token(ctx, STRING, lineno, orig, p + 1 - orig);
-    return 0;
-  }
-
-  if ('\"' == *p) {
-    int hexreq = 0; /* #hex required */
-    int escape = 0;
-    for (p++; *p; p++) {
-      if (escape) {
-        escape = 0;
-        if (strchr("btnfr\"\\", *p))
-          continue;
-        if (*p == 'u') {
-          hexreq = 4;
-          continue;
-        }
-        if (*p == 'U') {
-          hexreq = 8;
-          continue;
-        }
-        return e_syntax(ctx, lineno, "bad escape char");
-      }
-      if (hexreq) {
-        hexreq--;
-        if (strchr("0123456789ABCDEF", *p))
-          continue;
-        return e_syntax(ctx, lineno, "expect hex char");
-      }
-      if (*p == '\\') {
-        escape = 1;
-        continue;
-      }
-      if (*p == '\'') {
-        if (p[1] == '\'' && p[2] == '\'') {
-          return e_syntax(ctx, lineno, "triple-s-quote inside string lit");
-        }
-        continue;
-      }
-      if (*p == '\n')
-        break;
-      if (*p == '"')
-        break;
-    }
-    if (*p != '"') {
-      return e_syntax(ctx, lineno, "unterminated quote");
-    }
-
-    set_token(ctx, STRING, lineno, orig, p + 1 - orig);
-    return 0;
-  }
-
-  /* check for timestamp without quotes */
-  if (0 == scan_date(p, 0, 0, 0) || 0 == scan_time(p, 0, 0, 0)) {
-    // forward thru the timestamp
-    p += strspn(p, "0123456789.:+-Tt Zz");
-    // squeeze out any spaces at end of string
-    for (; p[-1] == ' '; p--)
-      ;
-    // tokenize
-    set_token(ctx, STRING, lineno, orig, p - orig);
-    return 0;
-  }
-
-  /* literals */
-  for (; *p && *p != '\n'; p++) {
-    int ch = *p;
-    if (ch == '.' && dotisspecial)
-      break;
-    if ('A' <= ch && ch <= 'Z')
-      continue;
-    if ('a' <= ch && ch <= 'z')
-      continue;
-    if (strchr("0123456789+-_.", ch))
-      continue;
-    break;
-  }
-
-  set_token(ctx, STRING, lineno, orig, p - orig);
-  return 0;
-}
-
-static int next_token(context_t *ctx, int dotisspecial) {
-  int lineno = ctx->tok.lineno;
-  char *p = ctx->tok.ptr;
-  int i;
-
-  /* eat this tok */
-  for (i = 0; i < ctx->tok.len; i++) {
-    if (*p++ == '\n')
-      lineno++;
-  }
-
-  /* make next tok */
-  while (p < ctx->stop) {
-    /* skip comment. stop just before the \n. */
-    if (*p == '#') {
-      for (p++; p < ctx->stop && *p != '\n'; p++)
-        ;
-      continue;
-    }
-
-    if (dotisspecial && *p == '.') {
-      set_token(ctx, DOT, lineno, p, 1);
-      return 0;
-    }
-
-    switch (*p) {
-    case ',':
-      set_token(ctx, COMMA, lineno, p, 1);
-      return 0;
-    case '=':
-      set_token(ctx, EQUAL, lineno, p, 1);
-      return 0;
-    case '{':
-      set_token(ctx, LBRACE, lineno, p, 1);
-      return 0;
-    case '}':
-      set_token(ctx, RBRACE, lineno, p, 1);
-      return 0;
-    case '[':
-      set_token(ctx, LBRACKET, lineno, p, 1);
-      return 0;
-    case ']':
-      set_token(ctx, RBRACKET, lineno, p, 1);
-      return 0;
-    case '\n':
-      set_token(ctx, NEWLINE, lineno, p, 1);
-      return 0;
-    case '\r':
-    case ' ':
-    case '\t':
-      /* ignore white spaces */
-      p++;
-      continue;
-    }
-
-    return scan_string(ctx, p, lineno, dotisspecial);
-  }
-
-  set_eof(ctx, lineno);
-  return 0;
-}
-
-const char *toml_key_in(const toml_table_t *tab, int keyidx) {
-  if (keyidx < tab->nkval)
-    return tab->kval[keyidx]->key;
-
-  keyidx -= tab->nkval;
-  if (keyidx < tab->narr)
-    return tab->arr[keyidx]->key;
-
-  keyidx -= tab->narr;
-  if (keyidx < tab->ntab)
-    return tab->tab[keyidx]->key;
-
-  return 0;
-}
-
-int toml_key_exists(const toml_table_t *tab, const char *key) {
-  int i;
-  for (i = 0; i < tab->nkval; i++) {
-    if (0 == strcmp(key, tab->kval[i]->key))
-      return 1;
-  }
-  for (i = 0; i < tab->narr; i++) {
-    if (0 == strcmp(key, tab->arr[i]->key))
-      return 1;
-  }
-  for (i = 0; i < tab->ntab; i++) {
-    if (0 == strcmp(key, tab->tab[i]->key))
-      return 1;
-  }
-  return 0;
-}
-
-toml_raw_t toml_raw_in(const toml_table_t *tab, const char *key) {
-  int i;
-  for (i = 0; i < tab->nkval; i++) {
-    if (0 == strcmp(key, tab->kval[i]->key))
-      return tab->kval[i]->val;
-  }
-  return 0;
-}
-
-toml_array_t *toml_array_in(const toml_table_t *tab, const char *key) {
-  int i;
-  for (i = 0; i < tab->narr; i++) {
-    if (0 == strcmp(key, tab->arr[i]->key))
-      return tab->arr[i];
-  }
-  return 0;
-}
-
-toml_table_t *toml_table_in(const toml_table_t *tab, const char *key) {
-  int i;
-  for (i = 0; i < tab->ntab; i++) {
-    if (0 == strcmp(key, tab->tab[i]->key))
-      return tab->tab[i];
-  }
-  return 0;
-}
-
-toml_raw_t toml_raw_at(const toml_array_t *arr, int idx) {
-  return (0 <= idx && idx < arr->nitem) ? arr->item[idx].val : 0;
-}
-
-char toml_array_kind(const toml_array_t *arr) { return arr->kind; }
-
-char toml_array_type(const toml_array_t *arr) {
-  if (arr->kind != 'v')
-    return 0;
-
-  if (arr->nitem == 0)
-    return 0;
-
-  return arr->type;
-}
-
-int toml_array_nelem(const toml_array_t *arr) { return arr->nitem; }
-
-const char *toml_array_key(const toml_array_t *arr) {
-  return arr ? arr->key : (const char *)NULL;
-}
-
-int toml_table_nkval(const toml_table_t *tab) { return tab->nkval; }
-
-int toml_table_narr(const toml_table_t *tab) { return tab->narr; }
-
-int toml_table_ntab(const toml_table_t *tab) { return tab->ntab; }
-
-const char *toml_table_key(const toml_table_t *tab) {
-  return tab ? tab->key : (const char *)NULL;
-}
-
-toml_array_t *toml_array_at(const toml_array_t *arr, int idx) {
-  return (0 <= idx && idx < arr->nitem) ? arr->item[idx].arr : 0;
-}
-
-toml_table_t *toml_table_at(const toml_array_t *arr, int idx) {
-  return (0 <= idx && idx < arr->nitem) ? arr->item[idx].tab : 0;
-}
-
-static int parse_millisec(const char *p, const char **endp);
-
-int toml_rtots(toml_raw_t src_, toml_timestamp_t *ret) {
-  if (!src_)
-    return -1;
-
-  const char *p = src_;
-  int must_parse_time = 0;
-
-  memset(ret, 0, sizeof(*ret));
-
-  int *year = &ret->__buffer.year;
-  int *month = &ret->__buffer.month;
-  int *day = &ret->__buffer.day;
-  int *hour = &ret->__buffer.hour;
-  int *minute = &ret->__buffer.minute;
-  int *second = &ret->__buffer.second;
-  int *millisec = &ret->__buffer.millisec;
-
-  /* parse date YYYY-MM-DD */
-  if (0 == scan_date(p, year, month, day)) {
-    ret->year = year;
-    ret->month = month;
-    ret->day = day;
-
-    p += 10;
-    if (*p) {
-      // parse the T or space separator
-      if (*p != 'T' && *p != 't' && *p != ' ')
-        return -1;
-      must_parse_time = 1;
-      p++;
-    }
-  }
-
-  /* parse time HH:MM:SS */
-  if (0 == scan_time(p, hour, minute, second)) {
-    ret->hour = hour;
-    ret->minute = minute;
-    ret->second = second;
-
-    /* optionally, parse millisec */
-    p += 8;
-    if (*p == '.') {
-      p++; /* skip '.' */
-      const char *qq;
-      *millisec = parse_millisec(p, &qq);
-      ret->millisec = millisec;
-      p = qq;
-    }
-
-    if (*p) {
-      /* parse and copy Z */
-      char *z = ret->__buffer.z;
-      ret->z = z;
-      if (*p == 'Z' || *p == 'z') {
-        *z++ = 'Z';
-        p++;
-        *z = 0;
-
-      } else if (*p == '+' || *p == '-') {
-        *z++ = *p++;
-
-        if (!(isdigit(p[0]) && isdigit(p[1])))
-          return -1;
-        *z++ = *p++;
-        *z++ = *p++;
-
-        if (*p == ':') {
-          *z++ = *p++;
-
-          if (!(isdigit(p[0]) && isdigit(p[1])))
-            return -1;
-          *z++ = *p++;
-          *z++ = *p++;
-        }
-
-        *z = 0;
-      }
-    }
-  }
-  if (*p != 0)
-    return -1;
-
-  if (must_parse_time && !ret->hour)
-    return -1;
-
-  return 0;
-}
-
-/* Raw to boolean */
-int toml_rtob(toml_raw_t src, int *ret_) {
-  if (!src)
-    return -1;
-  int dummy;
-  int *ret = ret_ ? ret_ : &dummy;
-
-  if (0 == strcmp(src, "true")) {
-    *ret = 1;
-    return 0;
-  }
-  if (0 == strcmp(src, "false")) {
-    *ret = 0;
-    return 0;
-  }
-  return -1;
-}
-
-/* Raw to integer */
-int toml_rtoi(toml_raw_t src, int64_t *ret_) {
-  if (!src)
-    return -1;
-
-  char buf[100];
-  char *p = buf;
-  char *q = p + sizeof(buf);
-  const char *s = src;
-  int base = 0;
-  int64_t dummy;
-  int64_t *ret = ret_ ? ret_ : &dummy;
-
-  /* allow +/- */
-  if (s[0] == '+' || s[0] == '-')
-    *p++ = *s++;
-
-  /* disallow +_100 */
-  if (s[0] == '_')
-    return -1;
-
-  /* if 0* ... */
-  if ('0' == s[0]) {
-    switch (s[1]) {
-    case 'x':
-      base = 16;
-      s += 2;
-      break;
-    case 'o':
-      base = 8;
-      s += 2;
-      break;
-    case 'b':
-      base = 2;
-      s += 2;
-      break;
-    case '\0':
-      return *ret = 0, 0;
-    default:
-      /* ensure no other digits after it */
-      if (s[1])
-        return -1;
-    }
-  }
-
-  /* just strip underscores and pass to strtoll */
-  while (*s && p < q) {
-    int ch = *s++;
-    if (ch == '_') {
-      // disallow '__'
-      if (s[0] == '_')
-        return -1;
-      // numbers cannot end with '_'
-      if (s[0] == '\0')
-        return -1;
-      continue; /* skip _ */
-    }
-    *p++ = ch;
-  }
-
-  // if not at end-of-string or we ran out of buffer ...
-  if (*s || p == q)
-    return -1;
-
-  /* cap with NUL */
-  *p = 0;
-
-  /* Run strtoll on buf to get the integer */
-  char *endp;
-  errno = 0;
-  *ret = strtoll(buf, &endp, base);
-  return (errno || *endp) ? -1 : 0;
-}
-
-int toml_rtod_ex(toml_raw_t src, double *ret_, char *buf, int buflen) {
-  if (!src)
-    return -1;
-
-  char *p = buf;
-  char *q = p + buflen;
-  const char *s = src;
-  double dummy;
-  double *ret = ret_ ? ret_ : &dummy;
-
-  /* allow +/- */
-  if (s[0] == '+' || s[0] == '-')
-    *p++ = *s++;
-
-  /* disallow +_1.00 */
-  if (s[0] == '_')
-    return -1;
-
-  /* decimal point, if used, must be surrounded by at least one digit on each
-   * side */
-  {
-    char *dot = strchr(s, '.');
-    if (dot) {
-      if (dot == s || !isdigit(dot[-1]) || !isdigit(dot[1]))
-        return -1;
-    }
-  }
-
-  /* zero must be followed by . or 'e', or NUL */
-  if (s[0] == '0' && s[1] && !strchr("eE.", s[1]))
-    return -1;
-
-  /* just strip underscores and pass to strtod */
-  while (*s && p < q) {
-    int ch = *s++;
-    if (ch == '_') {
-      // disallow '__'
-      if (s[0] == '_')
-        return -1;
-      // disallow last char '_'
-      if (s[0] == 0)
-        return -1;
-      continue; /* skip _ */
-    }
-    *p++ = ch;
-  }
-  if (*s || p == q)
-    return -1; /* reached end of string or buffer is full? */
-
-  /* cap with NUL */
-  *p = 0;
-
-  /* Run strtod on buf to get the value */
-  char *endp;
-  errno = 0;
-  *ret = strtod(buf, &endp);
-  return (errno || *endp) ? -1 : 0;
-}
-
-int toml_rtod(toml_raw_t src, double *ret_) {
-  char buf[100];
-  return toml_rtod_ex(src, ret_, buf, sizeof(buf));
-}
-
-int toml_rtos(toml_raw_t src, char **ret) {
-  int multiline = 0;
-  const char *sp;
-  const char *sq;
-
-  *ret = 0;
-  if (!src)
-    return -1;
-
-  int qchar = src[0];
-  int srclen = strlen(src);
-  if (!(qchar == '\'' || qchar == '"')) {
-    return -1;
-  }
-
-  // triple quotes?
-  if (qchar == src[1] && qchar == src[2]) {
-    multiline = 1;
-    sp = src + 3;
-    sq = src + srclen - 3;
-    /* last 3 chars in src must be qchar */
-    if (!(sp <= sq && sq[0] == qchar && sq[1] == qchar && sq[2] == qchar))
-      return -1;
-
-    /* skip new line immediate after qchar */
-    if (sp[0] == '\n')
-      sp++;
-    else if (sp[0] == '\r' && sp[1] == '\n')
-      sp += 2;
-
-  } else {
-    sp = src + 1;
-    sq = src + srclen - 1;
-    /* last char in src must be qchar */
-    if (!(sp <= sq && *sq == qchar))
-      return -1;
-  }
-
-  if (qchar == '\'') {
-    *ret = norm_lit_str(sp, sq - sp, multiline, 0, 0);
-  } else {
-    *ret = norm_basic_str(sp, sq - sp, multiline, 0, 0);
-  }
-
-  return *ret ? 0 : -1;
-}
-
-toml_datum_t toml_string_at(const toml_array_t *arr, int idx) {
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtos(toml_raw_at(arr, idx), &ret.u.s));
-  return ret;
-}
-
-toml_datum_t toml_bool_at(const toml_array_t *arr, int idx) {
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtob(toml_raw_at(arr, idx), &ret.u.b));
-  return ret;
-}
-
-toml_datum_t toml_int_at(const toml_array_t *arr, int idx) {
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtoi(toml_raw_at(arr, idx), &ret.u.i));
-  return ret;
-}
-
-toml_datum_t toml_double_at(const toml_array_t *arr, int idx) {
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtod(toml_raw_at(arr, idx), &ret.u.d));
-  return ret;
-}
-
-toml_datum_t toml_timestamp_at(const toml_array_t *arr, int idx) {
-  toml_timestamp_t ts;
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtots(toml_raw_at(arr, idx), &ts));
-  if (ret.ok) {
-    ret.ok = !!(ret.u.ts = MALLOC(sizeof(*ret.u.ts)));
-    if (ret.ok) {
-      *ret.u.ts = ts;
-      if (ret.u.ts->year)
-        ret.u.ts->year = &ret.u.ts->__buffer.year;
-      if (ret.u.ts->month)
-        ret.u.ts->month = &ret.u.ts->__buffer.month;
-      if (ret.u.ts->day)
-        ret.u.ts->day = &ret.u.ts->__buffer.day;
-      if (ret.u.ts->hour)
-        ret.u.ts->hour = &ret.u.ts->__buffer.hour;
-      if (ret.u.ts->minute)
-        ret.u.ts->minute = &ret.u.ts->__buffer.minute;
-      if (ret.u.ts->second)
-        ret.u.ts->second = &ret.u.ts->__buffer.second;
-      if (ret.u.ts->millisec)
-        ret.u.ts->millisec = &ret.u.ts->__buffer.millisec;
-      if (ret.u.ts->z)
-        ret.u.ts->z = ret.u.ts->__buffer.z;
-    }
-  }
-  return ret;
-}
-
-toml_datum_t toml_string_in(const toml_table_t *arr, const char *key) {
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  toml_raw_t raw = toml_raw_in(arr, key);
-  if (raw) {
-    ret.ok = (0 == toml_rtos(raw, &ret.u.s));
-  }
-  return ret;
-}
-
-toml_datum_t toml_bool_in(const toml_table_t *arr, const char *key) {
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtob(toml_raw_in(arr, key), &ret.u.b));
-  return ret;
-}
-
-toml_datum_t toml_int_in(const toml_table_t *arr, const char *key) {
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtoi(toml_raw_in(arr, key), &ret.u.i));
-  return ret;
-}
-
-toml_datum_t toml_double_in(const toml_table_t *arr, const char *key) {
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtod(toml_raw_in(arr, key), &ret.u.d));
-  return ret;
-}
-
-toml_datum_t toml_timestamp_in(const toml_table_t *arr, const char *key) {
-  toml_timestamp_t ts;
-  toml_datum_t ret;
-  memset(&ret, 0, sizeof(ret));
-  ret.ok = (0 == toml_rtots(toml_raw_in(arr, key), &ts));
-  if (ret.ok) {
-    ret.ok = !!(ret.u.ts = MALLOC(sizeof(*ret.u.ts)));
-    if (ret.ok) {
-      *ret.u.ts = ts;
-      if (ret.u.ts->year)
-        ret.u.ts->year = &ret.u.ts->__buffer.year;
-      if (ret.u.ts->month)
-        ret.u.ts->month = &ret.u.ts->__buffer.month;
-      if (ret.u.ts->day)
-        ret.u.ts->day = &ret.u.ts->__buffer.day;
-      if (ret.u.ts->hour)
-        ret.u.ts->hour = &ret.u.ts->__buffer.hour;
-      if (ret.u.ts->minute)
-        ret.u.ts->minute = &ret.u.ts->__buffer.minute;
-      if (ret.u.ts->second)
-        ret.u.ts->second = &ret.u.ts->__buffer.second;
-      if (ret.u.ts->millisec)
-        ret.u.ts->millisec = &ret.u.ts->__buffer.millisec;
-      if (ret.u.ts->z)
-        ret.u.ts->z = ret.u.ts->__buffer.z;
-    }
-  }
-  return ret;
-}
-
-static int parse_millisec(const char *p, const char **endp) {
-  int ret = 0;
-  int unit = 100; /* unit in millisec */
-  for (; '0' <= *p && *p <= '9'; p++, unit /= 10) {
-    ret += (*p - '0') * unit;
-  }
-  *endp = p;
-  return ret;
-}
--- a/frontend/toml.h
+++ /dev/null
@@ -1,175 +1,0 @@
-/*
-  MIT License
-
-  Copyright (c) CK Tan
-  https://github.com/cktan/tomlc99
-
-  Permission is hereby granted, free of charge, to any person obtaining a copy
-  of this software and associated documentation files (the "Software"), to deal
-  in the Software without restriction, including without limitation the rights
-  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-  copies of the Software, and to permit persons to whom the Software is
-  furnished to do so, subject to the following conditions:
-
-  The above copyright notice and this permission notice shall be included in all
-  copies or substantial portions of the Software.
-
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-  SOFTWARE.
-*/
-#ifndef TOML_H
-#define TOML_H
-
-#ifdef _MSC_VER
-#pragma warning(disable: 4996)
-#endif
-
-#include "p9.h"
-#include <stdio.h>
-
-#ifdef __cplusplus
-#define TOML_EXTERN extern "C"
-#else
-#define TOML_EXTERN extern
-#endif
-
-typedef struct toml_timestamp_t toml_timestamp_t;
-typedef struct toml_table_t toml_table_t;
-typedef struct toml_array_t toml_array_t;
-typedef struct toml_datum_t toml_datum_t;
-
-/* Parse a file. Return a table on success, or 0 otherwise.
- * Caller must toml_free(the-return-value) after use.
- */
-TOML_EXTERN toml_table_t *toml_parse_file(FILE *fp, char *errbuf, int errbufsz);
-
-/* Parse a string containing the full config.
- * Return a table on success, or 0 otherwise.
- * Caller must toml_free(the-return-value) after use.
- */
-TOML_EXTERN toml_table_t *toml_parse(char *conf, /* NUL terminated, please. */
-                                     char *errbuf, int errbufsz);
-
-/* Free the table returned by toml_parse() or toml_parse_file(). Once
- * this function is called, any handles accessed through this tab
- * directly or indirectly are no longer valid.
- */
-TOML_EXTERN void toml_free(toml_table_t *tab);
-
-/* Timestamp types. The year, month, day, hour, minute, second, z
- * fields may be NULL if they are not relevant. e.g. In a DATE
- * type, the hour, minute, second and z fields will be NULLs.
- */
-struct toml_timestamp_t {
-  struct { /* internal. do not use. */
-    int year, month, day;
-    int hour, minute, second, millisec;
-    char z[10];
-  } __buffer;
-  int *year, *month, *day;
-  int *hour, *minute, *second, *millisec;
-  char *z;
-};
-
-/*-----------------------------------------------------------------
- *  Enhanced access methods
- */
-struct toml_datum_t {
-  int ok;
-  union {
-    toml_timestamp_t *ts; /* ts must be freed after use */
-    char *s;              /* string value. s must be freed after use */
-    int b;                /* bool value */
-    int64_t i;            /* int value */
-    double d;             /* double value */
-  } u;
-};
-
-/* on arrays: */
-/* ... retrieve size of array. */
-TOML_EXTERN int toml_array_nelem(const toml_array_t *arr);
-/* ... retrieve values using index. */
-TOML_EXTERN toml_datum_t toml_string_at(const toml_array_t *arr, int idx);
-TOML_EXTERN toml_datum_t toml_bool_at(const toml_array_t *arr, int idx);
-TOML_EXTERN toml_datum_t toml_int_at(const toml_array_t *arr, int idx);
-TOML_EXTERN toml_datum_t toml_double_at(const toml_array_t *arr, int idx);
-TOML_EXTERN toml_datum_t toml_timestamp_at(const toml_array_t *arr, int idx);
-/* ... retrieve array or table using index. */
-TOML_EXTERN toml_array_t *toml_array_at(const toml_array_t *arr, int idx);
-TOML_EXTERN toml_table_t *toml_table_at(const toml_array_t *arr, int idx);
-
-/* on tables: */
-/* ... retrieve the key in table at keyidx. Return 0 if out of range. */
-TOML_EXTERN const char *toml_key_in(const toml_table_t *tab, int keyidx);
-/* ... returns 1 if key exists in tab, 0 otherwise */
-TOML_EXTERN int toml_key_exists(const toml_table_t *tab, const char *key);
-/* ... retrieve values using key. */
-TOML_EXTERN toml_datum_t toml_string_in(const toml_table_t *arr,
-                                        const char *key);
-TOML_EXTERN toml_datum_t toml_bool_in(const toml_table_t *arr, const char *key);
-TOML_EXTERN toml_datum_t toml_int_in(const toml_table_t *arr, const char *key);
-TOML_EXTERN toml_datum_t toml_double_in(const toml_table_t *arr,
-                                        const char *key);
-TOML_EXTERN toml_datum_t toml_timestamp_in(const toml_table_t *arr,
-                                           const char *key);
-/* .. retrieve array or table using key. */
-TOML_EXTERN toml_array_t *toml_array_in(const toml_table_t *tab,
-                                        const char *key);
-TOML_EXTERN toml_table_t *toml_table_in(const toml_table_t *tab,
-                                        const char *key);
-
-/*-----------------------------------------------------------------
- * lesser used
- */
-/* Return the array kind: 't'able, 'a'rray, 'v'alue, 'm'ixed */
-TOML_EXTERN char toml_array_kind(const toml_array_t *arr);
-
-/* For array kind 'v'alue, return the type of values
-   i:int, d:double, b:bool, s:string, t:time, D:date, T:timestamp, 'm'ixed
-   0 if unknown
-*/
-TOML_EXTERN char toml_array_type(const toml_array_t *arr);
-
-/* Return the key of an array */
-TOML_EXTERN const char *toml_array_key(const toml_array_t *arr);
-
-/* Return the number of key-values in a table */
-TOML_EXTERN int toml_table_nkval(const toml_table_t *tab);
-
-/* Return the number of arrays in a table */
-TOML_EXTERN int toml_table_narr(const toml_table_t *tab);
-
-/* Return the number of sub-tables in a table */
-TOML_EXTERN int toml_table_ntab(const toml_table_t *tab);
-
-/* Return the key of a table*/
-TOML_EXTERN const char *toml_table_key(const toml_table_t *tab);
-
-/*--------------------------------------------------------------
- * misc
- */
-TOML_EXTERN int toml_utf8_to_ucs(const char *orig, int len, int64_t *ret);
-TOML_EXTERN int toml_ucs_to_utf8(int64_t code, char buf[6]);
-TOML_EXTERN void toml_set_memutil(void *(*xxmalloc)(size_t),
-                                  void (*xxfree)(void *));
-
-/*--------------------------------------------------------------
- *  deprecated
- */
-/* A raw value, must be processed by toml_rto* before using. */
-typedef const char *toml_raw_t;
-TOML_EXTERN toml_raw_t toml_raw_in(const toml_table_t *tab, const char *key);
-TOML_EXTERN toml_raw_t toml_raw_at(const toml_array_t *arr, int idx);
-TOML_EXTERN int toml_rtos(toml_raw_t s, char **ret);
-TOML_EXTERN int toml_rtob(toml_raw_t s, int *ret);
-TOML_EXTERN int toml_rtoi(toml_raw_t s, int64_t *ret);
-TOML_EXTERN int toml_rtod(toml_raw_t s, double *ret);
-TOML_EXTERN int toml_rtod_ex(toml_raw_t s, double *ret, char *buf, int buflen);
-TOML_EXTERN int toml_rtots(toml_raw_t s, toml_timestamp_t *ret);
-
-#endif /* TOML_H */
--