ref: ad0bc37c23b5ee894700e475ec973751dd3a2158
dir: /trfn.c/
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "sbuf.h"
#include "tab.h"
#include "trfn.h"
#include "trfn_ch.h"
#define WX(w) (((w) < 0 ? (w) - trfn_div / 2 : (w) + trfn_div / 2) / trfn_div)
#define LEN(a) ((sizeof(a) / sizeof((a)[0])))
#define HEXDIGS "0123456789abcdef"
#define GNLEN 32
#define AGLLEN (8 * 1024)
static struct sbuf sbuf_char; /* charset section */
static struct sbuf sbuf_kern; /* kernpairs section */
static int trfn_div; /* divisor of widths */
static int trfn_swid; /* space width */
static int trfn_special; /* special flag */
static char trfn_ligs[1024]; /* font ligatures */
static char trfn_trname[256]; /* font troff name */
static char trfn_psname[256]; /* font ps name */
/* adobe glyphlist mapping */
static char agl_key[AGLLEN][GNLEN];
static char agl_val[AGLLEN][GNLEN];
static int agl_n;
/* lookup tables */
static struct tab *tab_agl;
static struct tab *tab_alts;
static struct tab *tab_ctyp;
static void pututf8(char **d, int c)
{
int l;
if (c > 0xffff) {
*(*d)++ = 0xf0 | (c >> 18);
l = 3;
} else if (c > 0x7ff) {
*(*d)++ = 0xe0 | (c >> 12);
l = 2;
} else if (c > 0x7f) {
*(*d)++ = 0xc0 | (c >> 6);
l = 1;
} else {
*(*d)++ = c > 0 ? c : ' ';
l = 0;
}
while (l--)
*(*d)++ = 0x80 | ((c >> (l * 6)) & 0x3f);
**d = '\0';
}
static int hexval(char *s, int len)
{
char *digs = HEXDIGS;
int n = 0;
int i;
for (i = 0; i < len; i++) {
if (s[i] && strchr(digs, tolower(s[i])))
n = n * 16 + (strchr(digs, tolower(s[i])) - digs);
else
break;
}
return len == 1 ? n << 4 : n;
}
static int agl_read(char *path)
{
FILE *fin = fopen(path, "r");
char ln[GNLEN * 8];
char val[GNLEN];
char *s, *d;
int i;
if (!fin)
return 1;
while (fgets(ln, sizeof(ln), fin)) {
s = strchr(ln, ';');
if (ln[0] == '#' || !s)
continue;
*s++ = '\0';
d = val;
while (s && *s) {
while (*s == ' ')
s++;
pututf8(&d, hexval(s, 6));
s = strchr(s, ' ');
}
*d = '\0';
strcpy(agl_key[agl_n], ln);
strcpy(agl_val[agl_n], val);
agl_n++;
}
fclose(fin);
tab_agl = tab_alloc(agl_n);
for (i = 0; i < agl_n; i++)
tab_put(tab_agl, agl_key[i], agl_val[i]);
return 0;
}
static char *agl_map(char *s)
{
return tab_get(tab_agl, s);
}
static int achar_map(char *name)
{
int i;
for (i = 0; i < LEN(achars); i++) {
struct achar *a = &achars[i];
if (!strncmp(a->name, name, strlen(a->name))) {
char *postfix = name + strlen(a->name);
if (!*postfix)
return a->c;
if (!strcmp("isolated", postfix))
return a->s ? a->s : a->c;
if (!strcmp("initial", postfix))
return a->i ? a->i : a->c;
if (!strcmp("medial", postfix))
return a->m ? a->m : a->c;
if (!strcmp("final", postfix))
return a->f ? a->f : a->c;
}
}
return 0;
}
static int trfn_name(char *dst, char *src)
{
char ch[GNLEN];
char *s;
int i;
if (src[0] == '.')
return 1;
if (src[1] && strchr(src, '.'))
return 1; /* ignore opentype features for now */
while (*src && *src != '.') {
s = ch;
if (src[0] == '_')
src++;
while (*src && *src != '_' && *src != '.')
*s++ = *src++;
*s = '\0';
if (agl_map(ch)) {
strcpy(dst, agl_map(ch));
for (i = 0; i < LEN(agl_exceptions); i++)
if (!strcmp(agl_exceptions[i][0], dst))
strcpy(dst, agl_exceptions[i][1]);
dst = strchr(dst, '\0');
} else if (ch[0] == 'u' && ch[1] == 'n' && ch[2] == 'i') {
for (i = 0; strlen(ch + 3 + 4 * i) >= 4; i++)
pututf8(&dst, hexval(ch + 3 + 4 * i, 4));
} else if (ch[0] == 'u' && ch[1] && strchr(HEXDIGS, tolower(ch[1]))) {
pututf8(&dst, hexval(ch + 1, 6));
} else if (achar_map(ch)) {
pututf8(&dst, achar_map(ch));
} else {
return 1;
}
}
return src[0];
}
static void trfn_lig(char *c)
{
int i;
for (i = 0; i < LEN(ligs); i++)
if (!strcmp(ligs[i], c))
sprintf(strchr(trfn_ligs, '\0'), "%s ", c);
}
static int trfn_type(char *c)
{
struct ctype *t = tab_get(tab_ctyp, c);
return t ? t->type : 3;
}
void trfn_char(char *c, char *n, int wid, int typ)
{
char uc[GNLEN];
char pos[GNLEN];
char **a;
if (trfn_name(uc, c))
strcpy(uc, "---");
if (strchr(uc, ' ')) { /* space not allowed in character names */
if (!trfn_swid && !strcmp(" ", uc))
trfn_swid = WX(wid);
return;
}
trfn_lig(uc);
if (typ < 0)
typ = trfn_type(uc);
strcpy(pos, c);
if (n && atoi(n) >= 0 && atoi(n) < 256)
strcpy(pos, n);
if (!n && !uc[1] && uc[0] >= 32 && uc[0] <= 125)
sprintf(pos, "%d", uc[0]);
sbuf_printf(&sbuf_char, "%s\t%d\t%d\t%s\n", uc, WX(wid), typ, pos);
a = tab_get(tab_alts, uc);
while (a && *a)
sbuf_printf(&sbuf_char, "%s\t\"\n", *a++);
}
void trfn_kern(char *c1, char *c2, int x)
{
char g1[GNLEN], g2[GNLEN];
if (!trfn_name(g1, c1) && !trfn_name(g2, c2) && abs(WX(x)) > WX(20))
if (!strchr(g1, ' ') && !strchr(g2, ' '))
sbuf_printf(&sbuf_kern, "%s\t%s\t%d\n", g1, g2, WX(x));
}
void trfn_trfont(char *name)
{
if (!trfn_trname[0])
strcpy(trfn_trname, name);
}
void trfn_psfont(char *name)
{
if (!trfn_psname[0])
strcpy(trfn_psname, name);
}
void trfn_print(void)
{
if (trfn_trname[0])
printf("name %s\n", trfn_trname);
if (trfn_psname[0])
printf("fontname %s\n", trfn_psname);
printf("spacewidth %d\n", trfn_swid);
printf("ligatures %s 0\n", trfn_ligs);
if (trfn_special)
printf("special\n");
printf("charset\n");
printf("%s", sbuf_buf(&sbuf_char));
printf("kernpairs\n");
printf("%s", sbuf_buf(&sbuf_kern));
}
void trfn_init(int res, int spc)
{
int i;
trfn_div = 7200 / res;
trfn_special = spc;
if (agl_read("glyphlist.txt"))
fprintf(stderr, "mktrfn: could not open glyphlist.txt\n");
sbuf_init(&sbuf_char);
sbuf_init(&sbuf_kern);
tab_alts = tab_alloc(LEN(alts));
tab_ctyp = tab_alloc(LEN(ctype));
for (i = 0; i < LEN(alts); i++)
tab_put(tab_alts, alts[i][0], alts[i] + 1);
for (i = 0; i < LEN(ctype); i++)
tab_put(tab_ctyp, ctype[i].ch, &ctype[i]);
}
void trfn_done(void)
{
sbuf_done(&sbuf_char);
sbuf_done(&sbuf_kern);
tab_free(tab_alts);
tab_free(tab_ctyp);
if (tab_agl)
tab_free(tab_agl);
}