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fontconfig/fc-lang/fc-lang.c

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C
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/*
* $RCSId: xc/lib/fontconfig/fc-lang/fc-lang.c,v 1.3 2002/08/22 07:36:43 keithp Exp $
*
* Copyright © 2002 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "fcint.h"
#include "fccharset.c"
#include "fcstr.c"
/*
* fc-lang
*
* Read a set of language orthographies and build C declarations for
* charsets which can then be used to identify which languages are
* supported by a given font. Note that this uses some utilities
* from the fontconfig library, so the necessary file is simply
* included in this compilation. A couple of extra utility
* functions are also needed in slightly modified form
*/
void
FcMemAlloc (int kind, int size)
{
}
void
FcMemFree (int kind, int size)
{
}
int
FcCacheNextOffset (int fd)
{
return -1;
}
FcChar8 *
FcConfigHome (void)
{
return getenv ("HOME");
}
static void
fatal (char *file, int lineno, char *msg)
{
fprintf (stderr, "%s:%d: %s\n", file, lineno, msg);
exit (1);
}
static char *
get_line (FILE *f, char *line, int *lineno)
{
char *hash;
if (!fgets (line, 1024, f))
return 0;
++(*lineno);
hash = strchr (line, '#');
if (hash)
*hash = '\0';
if (line[0] == '\0' || line[0] == '\n' || line[0] == '\032' || line[0] == '\r')
return get_line (f, line, lineno);
return line;
}
char *dir = 0;
static FILE *
scanopen (char *file)
{
FILE *f;
f = fopen (file, "r");
if (!f && dir)
{
char path[1024];
strcpy (path, dir);
strcat (path, "/");
strcat (path, file);
f = fopen (path, "r");
}
return f;
}
/*
* build a single charset from a source file
*
* The file format is quite simple, either
* a single hex value or a pair separated with a dash
*
* Comments begin with '#'
*/
static FcCharSet *
scan (FILE *f, char *file)
{
FcCharSet *c = 0;
FcCharSet *n;
int start, end, ucs4;
char line[1024];
int lineno = 0;
while (get_line (f, line, &lineno))
{
if (!strncmp (line, "include", 7))
{
file = strchr (line, ' ');
while (*file == ' ')
file++;
end = strlen (file);
if (file[end-1] == '\n')
file[end-1] = '\0';
f = scanopen (file);
if (!f)
fatal (file, 0, "can't open");
c = scan (f, file);
fclose (f);
return c;
}
if (strchr (line, '-'))
{
if (sscanf (line, "%x-%x", &start, &end) != 2)
fatal (file, lineno, "parse error");
}
else
{
if (sscanf (line, "%x", &start) != 1)
fatal (file, lineno, "parse error");
end = start;
}
if (!c)
c = FcCharSetCreate ();
for (ucs4 = start; ucs4 <= end; ucs4++)
{
if (!FcCharSetAddChar (c, ucs4))
fatal (file, lineno, "out of memory");
}
}
n = FcCharSetFreeze (c);
FcCharSetDestroy (c);
return n;
}
/*
* Convert a file name into a name suitable for C declarations
*/
static char *
get_name (char *file)
{
char *name;
char *dot;
dot = strchr (file, '.');
if (!dot)
dot = file + strlen(file);
name = malloc (dot - file + 1);
strncpy (name, file, dot - file);
name[dot-file] = '\0';
return name;
}
/*
* Convert a C name into a language name
*/
static char *
get_lang (char *name)
{
char *lang = malloc (strlen (name) + 1);
char *l = lang;
char c;
while ((c = *name++))
{
if (isupper ((int) (unsigned char) c))
c = tolower ((int) (unsigned char) c);
if (c == '_')
c = '-';
if (c == ' ')
continue;
*l++ = c;
}
*l++ = '\0';
return lang;
}
static int compare (const void *a, const void *b)
{
const FcChar8 *const *as = a, *const *bs = b;
return FcStrCmpIgnoreCase (*as, *bs);
}
#define MAX_LANG 1024
#define MAX_LANG_SET_MAP ((MAX_LANG + 31) / 32)
#define BitSet(map, id) ((map)[(id)>>5] |= ((FcChar32) 1 << ((id) & 0x1f)))
#define BitGet(map, id) ((map)[(id)>>5] >> ((id) & 0x1f)) & 1)
int
main (int argc, char **argv)
{
char *files[MAX_LANG];
FcCharSet *sets[MAX_LANG];
int duplicate[MAX_LANG];
int country[MAX_LANG];
char *names[MAX_LANG];
char *langs[MAX_LANG];
FILE *f;
int ncountry = 0;
int i = 0;
FcCharLeaf **leaves;
int total_leaves = 0;
int l, sl, tl;
int c;
char line[1024];
FcChar32 map[MAX_LANG_SET_MAP];
int num_lang_set_map;
int setRangeStart[26];
int setRangeEnd[26];
FcChar8 setRangeChar;
while (*++argv)
{
if (!strcmp (*argv, "-d"))
{
dir = *++argv;
continue;
}
if (i == MAX_LANG)
fatal (*argv, 0, "Too many languages");
files[i++] = *argv;
}
files[i] = 0;
qsort (files, i, sizeof (char *), compare);
i = 0;
while (files[i])
{
f = scanopen (files[i]);
if (!f)
fatal (files[i], 0, strerror (errno));
sets[i] = scan (f, files[i]);
names[i] = get_name (files[i]);
langs[i] = get_lang(names[i]);
if (strchr (langs[i], '-'))
country[ncountry++] = i;
total_leaves += sets[i]->num;
i++;
fclose (f);
}
sets[i] = 0;
leaves = malloc (total_leaves * sizeof (FcCharLeaf *));
tl = 0;
/*
* Find unique leaves
*/
for (i = 0; sets[i]; i++)
{
for (sl = 0; sl < sets[i]->num; sl++)
{
for (l = 0; l < tl; l++)
if (leaves[l] == FcCharSetGetLeaf(sets[i], sl))
break;
if (l == tl)
leaves[tl++] = FcCharSetGetLeaf(sets[i], sl);
}
}
/*
* Scan the input until the marker is found
*/
while (fgets (line, sizeof (line), stdin))
{
if (!strncmp (line, "@@@", 3))
break;
fputs (line, stdout);
}
printf ("/* total size: %d unique leaves: %d */\n\n",
total_leaves, tl);
/*
* Dump leaves
*/
printf ("static const FcCharLeaf leaves[%d] = {\n", tl);
for (l = 0; l < tl; l++)
{
printf (" { { /* %d */", l);
for (i = 0; i < 256/32; i++)
{
if (i % 4 == 0)
printf ("\n ");
printf (" 0x%08x,", leaves[l]->map[i]);
}
printf ("\n } },\n");
}
printf ("};\n\n");
printf ("#define L(n) ((FcCharLeaf *) &leaves[n])\n\n");
/*
* Find duplicate charsets
*/
duplicate[0] = -1;
for (i = 1; sets[i]; i++)
{
int j;
duplicate[i] = -1;
for (j = 0; j < i; j++)
if (sets[j] == sets[i])
{
duplicate[i] = j;
break;
}
}
/*
* Find ranges for each letter for faster searching
*/
setRangeChar = 'a';
for (i = 0; sets[i]; i++)
{
char c = names[i][0];
while (setRangeChar <= c && c <= 'z')
setRangeStart[setRangeChar++ - 'a'] = i;
}
for (setRangeChar = 'a'; setRangeChar < 'z'; setRangeChar++)
setRangeEnd[setRangeChar - 'a'] = setRangeStart[setRangeChar+1-'a'] - 1;
setRangeEnd[setRangeChar - 'a'] = i - 1;
/*
* Dump arrays
*/
for (i = 0; sets[i]; i++)
{
int n;
if (duplicate[i] >= 0)
continue;
printf ("static const FcCharLeaf *leaves_%s[%d] = {\n",
names[i], sets[i]->num);
for (n = 0; n < sets[i]->num; n++)
{
if (n % 8 == 0)
printf (" ");
for (l = 0; l < tl; l++)
if (leaves[l] == FcCharSetGetLeaf(sets[i], n))
break;
if (l == tl)
fatal (names[i], 0, "can't find leaf");
printf (" L(%3d),", l);
if (n % 8 == 7)
printf ("\n");
}
if (n % 8 != 0)
printf ("\n");
printf ("};\n\n");
printf ("static const FcChar16 numbers_%s[%d] = {\n",
names[i], sets[i]->num);
for (n = 0; n < sets[i]->num; n++)
{
if (n % 8 == 0)
printf (" ");
printf (" 0x%04x,", FcCharSetGetNumbers(sets[i])[n]);
if (n % 8 == 7)
printf ("\n");
}
if (n % 8 != 0)
printf ("\n");
printf ("};\n\n");
}
printf ("#undef L\n\n");
/*
* Dump sets
*/
printf ("static const FcLangCharSet fcLangCharSets[] = {\n");
for (i = 0; sets[i]; i++)
{
int j = duplicate[i];
if (j < 0)
j = i;
printf (" { (FcChar8 *) \"%s\",\n"
" { FC_REF_CONSTANT, %d, FcStorageDynamic, "
"{ { (FcCharLeaf **) leaves_%s, "
"(FcChar16 *) numbers_%s } } } },\n",
langs[i],
sets[j]->num, names[j], names[j]);
}
printf ("};\n\n");
printf ("#define NUM_LANG_CHAR_SET %d\n", i);
num_lang_set_map = (i + 31) / 32;
printf ("#define NUM_LANG_SET_MAP %d\n", num_lang_set_map);
/*
* Dump indices with country codes
*/
if (ncountry)
{
int ncountry_ent = 0;
printf ("\n");
printf ("static const FcChar32 fcLangCountrySets[][NUM_LANG_SET_MAP] = {\n");
for (c = 0; c < ncountry; c++)
{
i = country[c];
if (i >= 0)
{
int l = strchr (langs[i], '-') - langs[i];
int d, k;
for (k = 0; k < num_lang_set_map; k++)
map[k] = 0;
BitSet (map, i);
for (d = c + 1; d < ncountry; d++)
{
int j = country[d];
if (j >= 0 && !strncmp (langs[j], langs[i], l))
{
BitSet(map, j);
country[d] = -1;
}
}
printf (" {");
for (k = 0; k < num_lang_set_map; k++)
printf (" 0x%08x,", map[k]);
printf (" }, /* %*.*s */\n",
l, l, langs[i]);
++ncountry_ent;
}
}
printf ("};\n\n");
printf ("#define NUM_COUNTRY_SET %d\n", ncountry_ent);
}
/*
* Dump sets start/finish for the fastpath
*/
printf ("static const FcLangCharSetRange fcLangCharSetRanges[] = {\n");
for (setRangeChar = 'a'; setRangeChar <= 'z' ; setRangeChar++)
{
printf (" { %d, %d }, /* %c */\n",
setRangeStart[setRangeChar - 'a'],
setRangeEnd[setRangeChar - 'a'], setRangeChar);
}
printf ("};\n\n");
while (fgets (line, sizeof (line), stdin))
fputs (line, stdout);
fflush (stdout);
exit (ferror (stdout));
}
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