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/*-
* Copyright (c) 2006 Martin Husemann.
* Copyright (c) 2007 Joerg Sonnenberger.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This program is derived (in a straight forward way) from
* bdftruncate.pl -- Markus Kuhn <http://www.cl.cam.ac.uk/~mgk25/>
*
* This utility allows you to generate from an ISO10646-1 encoded
* BDF font other ISO10646-1 BDF fonts in which all characters above
* a threshold code value are stored unencoded.
*/
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static int iswide(unsigned int);
static void usage(void);
static int opt_minus_w;
static int opt_plus_w;
static int removewide;
static unsigned long threshold;
static int
parse_threshold(const char *str)
{
int base;
char *end_ptr;
if (!isdigit((unsigned char)*str))
return 1;
if (str[0] == 0 && (str[1] == 'x' || str[1] == 'X'))
base = 16;
else
base = 10;
errno = 0;
threshold = strtoul(str, &end_ptr, base);
if (errno != 0 || threshold == 0)
return 1;
return 0;
}
static void
process_line(const char *line)
{
if (strncmp(line, "ENCODING", 8) == 0) {
unsigned long enc;
const char *v;
v = line + 9;
while (*v && isspace((unsigned char)(*v)))
++v;
enc = strtoul(v, NULL, 10);
/* XXX Check for line-ending? */
if (enc >= threshold || (removewide && iswide(enc))) {
printf("ENCODING -1\n");
} else {
fputs(line, stdout);
}
return;
}
if (strncmp(line, "STARTFONT", 9) == 0) {
fputs(line, stdout);
printf("COMMENT AUTOMATICALLY GENERATED FILE. DO NOT EDIT!\n"
"COMMENT In this version of the font file, "
"all characters >= U+%04lx are\n"
"COMMENT not encoded to keep XFontStruct small.\n",
threshold);
return;
}
if (strncmp(line, "COMMENT", 7) == 0) {
const char *v = line + 8;
while (*v && isspace((unsigned char)(*v)))
v++;
if (strncmp(v, "$id: ", 5) == 0 ||
strncmp(v, "$Id: ", 5) == 0) {
const char *id = strchr(v+1, '$');
if (id) {
printf("COMMENT Derived from %.*s",
(int)(id - v - 4), v + 5);
return;
}
}
}
fputs(line, stdout);
}
int
main(int argc, char **argv)
{
int removewide;
char *line, *input_ptr;
size_t line_len, rest_len;
--argc;
++argv;
if (argc == 0)
usage();
if (strcmp(*argv, "-w") == 0 || strcmp(*argv, "+w") == 0) {
if (**argv == '-')
opt_minus_w = 1;
else
opt_plus_w = 1;
--argc;
++argv;
}
if (argc != 1 || (opt_plus_w && opt_minus_w))
usage();
if (parse_threshold(*argv)) {
fprintf(stderr, "Illegal threshold %s", *argv);
usage();
}
if (opt_minus_w)
removewide = 1;
else if (opt_plus_w)
removewide = 0;
else
removewide = (threshold <= 0x3200);
line_len = 1024;
if ((line = malloc(line_len)) == NULL) {
fprintf(stderr, "malloc failed");
exit(EXIT_FAILURE);
}
for (;;) {
if (fgets(line, line_len, stdin) == NULL)
break;
while (strlen(line) == line_len - 1 && !feof(stdin)) {
if (line_len > SSIZE_MAX) {
fprintf(stderr, "input line too large");
exit(EXIT_FAILURE);
}
line = realloc(line, line_len * 2);
if (line == NULL) {
fprintf(stderr, "realloc failed");
exit(EXIT_FAILURE);
}
input_ptr = line + line_len - 1;
rest_len = line_len + 1;
line_len *= 2;
if (fgets(input_ptr, rest_len, stdin) == NULL) {
/* Should not happen, but handle as EOF */
break;
}
}
process_line(line);
}
return EXIT_SUCCESS;
}
/*
* Subroutine to identify whether the ISO 10646/Unicode character code
* ucs belongs into the East Asian Wide (W) or East Asian FullWidth
* (F) category as defined in Unicode Technical Report #11.
*/
static int
iswide(unsigned int ucs)
{
return (ucs >= 0x1100 &&
(ucs <= 0x115f || /* Hangul Jamo */
(ucs >= 0x2e80 && ucs <= 0xa4cf &&
(ucs & ~0x0011) != 0x300a && ucs != 0x303f) || /* CJK .. Yi */
(ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */
(ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Comp. Ideographs */
(ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Comp. Forms */
(ucs >= 0xff00 && ucs <= 0xff5f) || /* Fullwidth Forms */
(ucs >= 0xffe0 && ucs <= 0xffe6) ||
(ucs >= 0x20000 && ucs <= 0x2ffff)));
}
static void
usage(void)
{
fprintf(stderr,
"Usage: bdftruncate [+w|-w] threshold <source.bdf >destination.bdf\n"
"\n"
"Example:\n"
"\n"
" bdftruncate 0x3200 <6x13.bdf >6x13t.bdf\n"
"\n"
"will generate the file 6x13t.bdf in which all glyphs with codes\n"
">= 0x3200 will only be stored unencoded (i.e., ENCODING -1).\n"
"Option -w removes East Asian Wide and East Asian FullWidth characters\n"
"(default if threshold <= 0x3200), and option +w keeps them.\n");
exit(EXIT_FAILURE);
}
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