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/*
* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
*
* This file is part of libass.
*
* libass is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* libass is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with libass; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>
#include <ft2build.h>
#include FT_GLYPH_H
#include "ass_library.h"
#include "ass.h"
#include "ass_utils.h"
int mystrtoi(char **p, int *res)
{
double temp_res;
char *start = *p;
temp_res = ass_strtod(*p, p);
*res = (int) (temp_res + (temp_res > 0 ? 0.5 : -0.5));
if (*p != start)
return 1;
else
return 0;
}
int mystrtoll(char **p, long long *res)
{
double temp_res;
char *start = *p;
temp_res = ass_strtod(*p, p);
*res = (int) (temp_res + (temp_res > 0 ? 0.5 : -0.5));
if (*p != start)
return 1;
else
return 0;
}
int mystrtou32(char **p, int base, uint32_t *res)
{
char *start = *p;
*res = strtoll(*p, p, base);
if (*p != start)
return 1;
else
return 0;
}
int mystrtod(char **p, double *res)
{
char *start = *p;
*res = ass_strtod(*p, p);
if (*p != start)
return 1;
else
return 0;
}
int strtocolor(ASS_Library *library, char **q, uint32_t *res, int hex)
{
uint32_t color = 0;
int result;
char *p = *q;
int base = hex ? 16 : 10;
if (*p == '&')
++p;
else
ass_msg(library, MSGL_DBG2, "suspicious color format: \"%s\"\n", p);
if (*p == 'H' || *p == 'h') {
++p;
result = mystrtou32(&p, 16, &color);
} else {
result = mystrtou32(&p, base, &color);
}
{
unsigned char *tmp = (unsigned char *) (&color);
unsigned char b;
b = tmp[0];
tmp[0] = tmp[3];
tmp[3] = b;
b = tmp[1];
tmp[1] = tmp[2];
tmp[2] = b;
}
if (*p == '&')
++p;
*q = p;
*res = color;
return result;
}
// Return a boolean value for a string
char parse_bool(char *str)
{
while (*str == ' ' || *str == '\t')
str++;
if (!strncasecmp(str, "yes", 3))
return 1;
else if (strtol(str, NULL, 10) > 0)
return 1;
return 0;
}
void ass_msg(ASS_Library *priv, int lvl, char *fmt, ...)
{
va_list va;
va_start(va, fmt);
priv->msg_callback(lvl, fmt, va, priv->msg_callback_data);
va_end(va);
}
unsigned ass_utf8_get_char(char **str)
{
uint8_t *strp = (uint8_t *) * str;
unsigned c = *strp++;
unsigned mask = 0x80;
int len = -1;
while (c & mask) {
mask >>= 1;
len++;
}
if (len <= 0 || len > 4)
goto no_utf8;
c &= mask - 1;
while ((*strp & 0xc0) == 0x80) {
if (len-- <= 0)
goto no_utf8;
c = (c << 6) | (*strp++ & 0x3f);
}
if (len)
goto no_utf8;
*str = (char *) strp;
return c;
no_utf8:
strp = (uint8_t *) * str;
c = *strp++;
*str = (char *) strp;
return c;
}
#ifdef CONFIG_ENCA
void *ass_guess_buffer_cp(ASS_Library *library, unsigned char *buffer,
int buflen, char *preferred_language,
char *fallback)
{
const char **languages;
size_t langcnt;
EncaAnalyser analyser;
EncaEncoding encoding;
char *detected_sub_cp = NULL;
int i;
languages = enca_get_languages(&langcnt);
ass_msg(library, MSGL_V, "ENCA supported languages");
for (i = 0; i < langcnt; i++) {
ass_msg(library, MSGL_V, "lang %s", languages[i]);
}
for (i = 0; i < langcnt; i++) {
const char *tmp;
if (strcasecmp(languages[i], preferred_language) != 0)
continue;
analyser = enca_analyser_alloc(languages[i]);
encoding = enca_analyse_const(analyser, buffer, buflen);
tmp = enca_charset_name(encoding.charset, ENCA_NAME_STYLE_ICONV);
if (tmp && encoding.charset != ENCA_CS_UNKNOWN) {
detected_sub_cp = strdup(tmp);
ass_msg(library, MSGL_INFO, "ENCA detected charset: %s", tmp);
}
enca_analyser_free(analyser);
}
free(languages);
if (!detected_sub_cp) {
detected_sub_cp = strdup(fallback);
ass_msg(library, MSGL_INFO,
"ENCA detection failed: fallback to %s", fallback);
}
return detected_sub_cp;
}
#endif
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