diff options
Diffstat (limited to '3rdparty/libflac/src/share/utf8/utf8.c')
-rw-r--r-- | 3rdparty/libflac/src/share/utf8/utf8.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/3rdparty/libflac/src/share/utf8/utf8.c b/3rdparty/libflac/src/share/utf8/utf8.c new file mode 100644 index 00000000000..303fe23a060 --- /dev/null +++ b/3rdparty/libflac/src/share/utf8/utf8.c @@ -0,0 +1,319 @@ +/* + * Copyright (C) 2001 Peter Harris <peter.harris@hummingbird.com> + * Copyright (C) 2001 Edmund Grimley Evans <edmundo@rano.org> + * + * Buffer overflow checking added: Josh Coalson, 9/9/2007 + * + * This program 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. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * Convert a string between UTF-8 and the locale's charset. + */ + +#if HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdlib.h> +#include <string.h> + +#include "share/alloc.h" +#include "utf8.h" +#include "charset.h" + + +#ifdef _WIN32 + + /* Thanks to Peter Harris <peter.harris@hummingbird.com> for this win32 + * code. + */ + +#include <stdio.h> +#include <windows.h> + +static unsigned char *make_utf8_string(const wchar_t *unicode) +{ + size_t size = 0, n; + int index = 0, out_index = 0; + unsigned char *out; + unsigned short c; + + /* first calculate the size of the target string */ + c = unicode[index++]; + while(c) { + if(c < 0x0080) { + n = 1; + } else if(c < 0x0800) { + n = 2; + } else { + n = 3; + } + if(size+n < size) /* overflow check */ + return NULL; + size += n; + c = unicode[index++]; + } + + out = safe_malloc_add_2op_(size, /*+*/1); + if (out == NULL) + return NULL; + index = 0; + + c = unicode[index++]; + while(c) + { + if(c < 0x080) { + out[out_index++] = (unsigned char)c; + } else if(c < 0x800) { + out[out_index++] = 0xc0 | (c >> 6); + out[out_index++] = 0x80 | (c & 0x3f); + } else { + out[out_index++] = 0xe0 | (c >> 12); + out[out_index++] = 0x80 | ((c >> 6) & 0x3f); + out[out_index++] = 0x80 | (c & 0x3f); + } + c = unicode[index++]; + } + out[out_index] = 0x00; + + return out; +} + +static wchar_t *make_unicode_string(const unsigned char *utf8) +{ + size_t size = 0; + int index = 0, out_index = 0; + wchar_t *out; + unsigned char c; + + /* first calculate the size of the target string */ + c = utf8[index++]; + while(c) { + if((c & 0x80) == 0) { + index += 0; + } else if((c & 0xe0) == 0xe0) { + index += 2; + } else { + index += 1; + } + if(size + 1 == 0) /* overflow check */ + return NULL; + size++; + c = utf8[index++]; + } + + if(size + 1 == 0) /* overflow check */ + return NULL; + out = safe_malloc_mul_2op_(size+1, /*times*/sizeof(wchar_t)); + if (out == NULL) + return NULL; + index = 0; + + c = utf8[index++]; + while(c) + { + if((c & 0x80) == 0) { + out[out_index++] = c; + } else if((c & 0xe0) == 0xe0) { + out[out_index] = (c & 0x1F) << 12; + c = utf8[index++]; + out[out_index] |= (c & 0x3F) << 6; + c = utf8[index++]; + out[out_index++] |= (c & 0x3F); + } else { + out[out_index] = (c & 0x3F) << 6; + c = utf8[index++]; + out[out_index++] |= (c & 0x3F); + } + c = utf8[index++]; + } + out[out_index] = 0; + + return out; +} + +int utf8_encode(const char *from, char **to) +{ + wchar_t *unicode; + int wchars, err; + + wchars = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, from, + strlen(from), NULL, 0); + + if(wchars == 0) + { + fprintf(stderr, "Unicode translation error %d\n", GetLastError()); + return -1; + } + + if(wchars < 0) /* underflow check */ + return -1; + + unicode = safe_calloc_((size_t)wchars + 1, sizeof(unsigned short)); + if(unicode == NULL) + { + fprintf(stderr, "Out of memory processing string to UTF8\n"); + return -1; + } + + err = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, from, + strlen(from), unicode, wchars); + if(err != wchars) + { + free(unicode); + fprintf(stderr, "Unicode translation error %d\n", GetLastError()); + return -1; + } + + /* On NT-based windows systems, we could use WideCharToMultiByte(), but + * MS doesn't actually have a consistent API across win32. + */ + *to = make_utf8_string(unicode); + + free(unicode); + return 0; +} + +int utf8_decode(const char *from, char **to) +{ + wchar_t *unicode; + int chars, err; + + /* On NT-based windows systems, we could use MultiByteToWideChar(CP_UTF8), but + * MS doesn't actually have a consistent API across win32. + */ + unicode = make_unicode_string(from); + if(unicode == NULL) + { + fprintf(stderr, "Out of memory processing string from UTF8 to UNICODE16\n"); + return -1; + } + + chars = WideCharToMultiByte(GetConsoleCP(), WC_COMPOSITECHECK, unicode, + -1, NULL, 0, NULL, NULL); + + if(chars < 0) /* underflow check */ + return -1; + + if(chars == 0) + { + fprintf(stderr, "Unicode translation error %d\n", GetLastError()); + free(unicode); + return -1; + } + + *to = safe_calloc_((size_t)chars + 1, sizeof(unsigned char)); + if(*to == NULL) + { + fprintf(stderr, "Out of memory processing string to local charset\n"); + free(unicode); + return -1; + } + + err = WideCharToMultiByte(GetConsoleCP(), WC_COMPOSITECHECK, unicode, + -1, *to, chars, NULL, NULL); + if(err != chars) + { + fprintf(stderr, "Unicode translation error %d\n", GetLastError()); + free(unicode); + free(*to); + *to = NULL; + return -1; + } + + free(unicode); + return 0; +} + +#else /* End win32. Rest is for real operating systems */ + + +#ifdef HAVE_LANGINFO_CODESET +#include <langinfo.h> +#endif + +#include "iconvert.h" + +static const char *current_charset(void) +{ + const char *c = 0; +#ifdef HAVE_LANGINFO_CODESET + c = nl_langinfo(CODESET); +#endif + + if (!c) + c = getenv("CHARSET"); + + return c? c : "US-ASCII"; +} + +static int convert_buffer(const char *fromcode, const char *tocode, + const char *from, size_t fromlen, + char **to, size_t *tolen) +{ + int ret = -1; + +#ifdef HAVE_ICONV + ret = iconvert(fromcode, tocode, from, fromlen, to, tolen); + if (ret != -1) + return ret; +#endif + +#ifndef HAVE_ICONV /* should be ifdef USE_CHARSET_CONVERT */ + ret = charset_convert(fromcode, tocode, from, fromlen, to, tolen); + if (ret != -1) + return ret; +#endif + + return ret; +} + +static int convert_string(const char *fromcode, const char *tocode, + const char *from, char **to, char replace) +{ + int ret; + size_t fromlen; + char *s; + + fromlen = strlen(from); + ret = convert_buffer(fromcode, tocode, from, fromlen, to, 0); + if (ret == -2) + return -1; + if (ret != -1) + return ret; + + s = safe_malloc_add_2op_(fromlen, /*+*/1); + if (!s) + return -1; + strcpy(s, from); + *to = s; + for (; *s; s++) + if (*s & ~0x7f) + *s = replace; + return 3; +} + +int utf8_encode(const char *from, char **to) +{ + return convert_string(current_charset(), "UTF-8", from, to, '#'); +} + +int utf8_decode(const char *from, char **to) +{ + return convert_string("UTF-8", current_charset(), from, to, '?'); +} + +#endif |