ref: 49f1b55b7a3ddc7bb97a53ab70fc3e88e3a897aa
dir: /sys/src/cmd/troff/t11.c/
#include "tdef.h"
#include "fns.h"
#include "ext.h"
#define MAXCH NCHARS /* maximum number of global char names */
char *chnames[MAXCH]; /* chnames[n-ALPHABET] -> name of char n */
int nchnames; /* number of Cxy names currently seen */
#define MAXPS 100 /* max number of point sizes */
int pstab[MAXPS]; /* point sizes */
int nsizes; /* number in DESC */
Font fonts[MAXFONTS+1]; /* font info + ptr to width info */
static int getlig(char **);
getdesc(char *name)
{
FILE *fin;
char *cmd, *s;
char ln[128];
char *toks[50];
int i, v, ntok;
if ((fin = fopen(name, "r")) == NULL)
return -1;
while (fgets(ln, sizeof ln, fin) != NULL) {
memset(toks, 0, sizeof toks);
ntok = getfields(ln, toks, nelem(toks), 1, "\r\n\t ");
if (ntok == 0)
continue;
cmd = toks[0];
if (strcmp(cmd, "res") == 0)
Inch = atoi(toks[1]);
else if (strcmp(cmd, "hor") == 0)
Hor = atoi(toks[1]);
else if (strcmp(cmd, "vert") == 0)
Vert = atoi(toks[1]);
else if (strcmp(cmd, "unitwidth") == 0)
Unitwidth = atoi(toks[1]);
else if (strcmp(cmd, "sizes") == 0) {
nsizes = 0;
while (toks[nsizes+1] && (v = atoi(toks[nsizes+1])) != 0 &&
nsizes < MAXPS)
pstab[nsizes++] = v;
} else if (strcmp(cmd, "fonts") == 0) {
nfonts = atoi(toks[1]);
for (i = 1; i <= nfonts; i++) {
s = toks[i+1];
fontlab[i] = PAIR(s[0], s[1]);
}
} else if (strcmp(cmd, "charset") == 0) { /* add any names */
/* chew up any remaining lines */
while (fgets(ln, sizeof ln, fin) != NULL) {
ntok = getfields(ln, toks, nelem(toks), 1, "\r\n\t ");
for (i = 0; i < ntok; i++)
chadd(toks[i], Troffchar, Install);
}
break;
}
/* else
just skip anything else */
}
fclose(fin);
return 1;
}
static int checkfont(char *name)
{ /* in case it's not really a font description file */
/* really paranoid, but consider \f. */
FILE *fp;
char *buf2, *p;
char buf[300];
int i, status = -1;
if ((fp = fopen(name, "r")) == NULL)
return -1;
for (i = 1; i <= 10; i++) {
if (fgets(buf, sizeof buf, fp) == NULL)
break;
buf2 = skipspace(buf);
if (buf2[0] == '#') {
i--;
continue;
}
p = skipword(buf2);
*p = '\0';
if (eq(buf2, "name") || eq(buf2, "fontname") ||
eq(buf2, "special") || eq(buf2, "charset")) {
status = 1;
break;
}
}
fclose(fp);
return status;
}
getfont(char *name, int pos) /* create width tab for font */
{
FILE *fin;
Font *ftemp = &fonts[pos];
Chwid chtemp[MAXCH];
static Chwid chinit;
int i, nw, n, wid, kern, code, ntok;
wchar_t wc;
char buf[128], ln[300], dummy[32];
char *toks[30];
char *ch, *cmd;
dummy[0] = '\0';
ch = dummy;
/* fprintf(stderr, "read font %s onto %d\n", name, pos); */
if (checkfont(name) == -1)
return -1;
if ((fin = fopen(name, "r")) == NULL)
return -1;
for (i = 0; i < ALPHABET; i++)
chtemp[i] = chinit; /* zero out to begin with */
ftemp->specfont = ftemp->ligfont = 0;
ftemp->defaultwidth = ftemp->spacewidth = Inch * Unitwidth / 72 / 3;
/* should be rounded */
nw = code = kern = wid = 0;
while (fgets(ln, sizeof ln, fin) != NULL) {
memset(toks, 0, sizeof toks);
ntok = getfields(ln, toks, nelem(toks), 1, "\r\n\t ");
if (ntok == 0)
continue;
cmd = toks[0];
if (strcmp(cmd, "name") == 0)
strcpy(ftemp->longname, toks[1]);
else if (strcmp(cmd, "special") == 0)
ftemp->specfont = 1;
else if (strcmp(cmd, "ligatures") == 0)
ftemp->ligfont = getlig(&toks[1]);
else if (strcmp(cmd, "spacewidth") == 0)
ftemp->spacewidth = atoi(toks[1]);
else if (strcmp(cmd, "defaultwidth") == 0)
ftemp->defaultwidth = atoi(toks[1]);
else if (strcmp(cmd, "charset") == 0) {
nw = ALPHABET;
while (fgets(buf, sizeof buf, fin) != NULL) {
memset(toks, 0, sizeof toks);
ntok = getfields(buf, toks, 5, 1, "\r\n\t ");
if (ntok >= 4 &&
toks[1][0] != '"') { /* genuine new character */
ch = toks[0];
wid = atoi(toks[1]);
kern = atoi(toks[2]);
code = atoi(toks[3]); /* dec/oct/hex */
/* toks[4] is char name */
}
/*
* otherwise it's a synonym for prev character,
* so leave previous values intact.
*/
/* decide what kind of alphabet it might come from here */
if (ch[0] && ch[1] == '\0') { /* it's ascii */
n = ch[0] & 0xff; /* origin includes non-graphics */
chtemp[n].num = n;
} else if (ch[0] == '\\' && ch[1] == '0') {
n = strtol(ch+1, 0, 0); /* \0octal or \0xhex */
chtemp[n].num = n;
#ifdef UNICODE
} else if (mbtowc(&wc, ch, strlen(ch)) > 1) {
chtemp[nw].num = chadd(ch, MBchar, Install);
n = nw;
nw++;
#endif /*UNICODE*/
} else {
if (strcmp(ch, "---") == 0) { /* no name */
snprintf(dummy, sizeof dummy,
"%d", code);
ch = dummy;
n = chadd(ch, Number, Install);
} else
n = chadd(ch, Troffchar, Install);
chtemp[nw].num = n;
n = nw;
nw++;
}
chtemp[n].wid = wid;
chtemp[n].kern = kern;
chtemp[n].code = code;
/*fprintf(stderr, "font %2.2s char %4.4s num %3d wid %2d code %3d\n",
ftemp->longname, ch, n, wid, code);
*/
}
break;
}
}
fclose(fin);
chtemp[' '].wid = ftemp->spacewidth; /* width of space on this font */
ftemp->nchars = nw;
if (ftemp->wp)
free(ftemp->wp); /* god help us if this wasn't allocated */
ftemp->wp = (Chwid *) malloc(nw * sizeof(Chwid));
if (ftemp->wp == NULL)
return -1;
for (i = 0; i < nw; i++)
ftemp->wp[i] = chtemp[i];
/*
* printf("%d chars: ", nw);
* for (i = 0; i < nw; i++)
* if (ftemp->wp[i].num > 0 && ftemp->wp[i].num < ALPHABET) {
* printf("%c %d ", ftemp->wp[i].num, ftemp->wp[i].wid);
* else if (i >= ALPHABET)
* printf("%d (%s) %d ", ftemp->wp[i].num,
* chnames[ftemp->wp[i].num-ALPHABET], ftemp->wp[i].wid);
* }
* printf("\n");
*/
return 1;
}
chadd(char *s, int type, int install) /* add s to global character name table; */
{ /* or just look it up */
/* a temporary kludge: store the "type" as the first character */
/* of the string, so we can remember from whence it came */
char *p;
int i;
/* fprintf(stderr, "into chadd %s %c %c\n", s, type, install); /* */
for (i = 0; i < nchnames; i++)
/* +1 since type at front */
if (type == chnames[i][0] && eq(s, chnames[i]+1))
break;
/* fprintf(stderr, "i %d, nchnames %d\n", i, nchnames); /* */
if (i < nchnames) /* found same type and bytes at position i */
return ALPHABET + i;
else if (install == Lookup) /* not found, and we were just looking */
return -1;
chnames[nchnames] = p = (char *) malloc(strlen(s)+1+1); /* type + \0 */
if (p == NULL) {
ERROR "out of space adding character %s", s WARN;
return LEFTHAND;
}
if (nchnames >= NCHARS - ALPHABET) {
ERROR "out of table space adding character %s", s WARN;
return LEFTHAND;
}
strcpy(chnames[nchnames]+1, s);
chnames[nchnames][0] = type;
/* fprintf(stderr, "installed %c%s at %d\n", type, s, nchnames); /* */
return nchnames++ + ALPHABET;
}
char *chname(int n) /* return string for char with index n */
{ /* includes type char at front, to be peeled off elsewhere */
if (n >= ALPHABET && n < nchnames + ALPHABET)
return chnames[n-ALPHABET];
else
return "";
}
static int
getlig(char **toks) /* pick up ligature list. e.g., "ligatures ff fi 0" */
{
int lig, i;
char *temp;
lig = 0;
for (i = 0; toks[i] && strcmp(toks[i], "0") != 0; i++) {
temp = toks[i];
if (strcmp(temp, "fi") == 0)
lig |= LFI;
else if (strcmp(temp, "fl") == 0)
lig |= LFL;
else if (strcmp(temp, "ff") == 0)
lig |= LFF;
else if (strcmp(temp, "ffi") == 0)
lig |= LFFI;
else if (strcmp(temp, "ffl") == 0)
lig |= LFFL;
else
fprintf(stderr, "illegal ligature %s ignored\n", temp);
}
return lig;
}