From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Sat, 27 Dec 2025 12:03:39 -0800 Subject: Initial commit --- contrib/SDL-3.2.8/src/stdlib/SDL_iconv.c | 860 +++++++++++++++++++++++++++++++ 1 file changed, 860 insertions(+) create mode 100644 contrib/SDL-3.2.8/src/stdlib/SDL_iconv.c (limited to 'contrib/SDL-3.2.8/src/stdlib/SDL_iconv.c') diff --git a/contrib/SDL-3.2.8/src/stdlib/SDL_iconv.c b/contrib/SDL-3.2.8/src/stdlib/SDL_iconv.c new file mode 100644 index 0000000..fbea033 --- /dev/null +++ b/contrib/SDL-3.2.8/src/stdlib/SDL_iconv.c @@ -0,0 +1,860 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2025 Sam Lantinga + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "SDL_internal.h" + +// This file contains portable iconv functions for SDL + +#if defined(HAVE_ICONV) && defined(HAVE_ICONV_H) +#ifndef SDL_USE_LIBICONV +// Define LIBICONV_PLUG to use iconv from the base instead of ports and avoid linker errors. +#define LIBICONV_PLUG 1 +#endif +#include +#include + +SDL_COMPILE_TIME_ASSERT(iconv_t, sizeof(iconv_t) <= sizeof(SDL_iconv_t)); + +SDL_iconv_t SDL_iconv_open(const char *tocode, const char *fromcode) +{ + return (SDL_iconv_t)((uintptr_t)iconv_open(tocode, fromcode)); +} + +int SDL_iconv_close(SDL_iconv_t cd) +{ + if ((size_t)cd == SDL_ICONV_ERROR) { + return -1; + } + return iconv_close((iconv_t)((uintptr_t)cd)); +} + +size_t SDL_iconv(SDL_iconv_t cd, + const char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ + if ((size_t)cd == SDL_ICONV_ERROR) { + return SDL_ICONV_ERROR; + } + /* iconv's second parameter may or may not be `const char const *` depending on the + C runtime's whims. Casting to void * seems to make everyone happy, though. */ + const size_t retCode = iconv((iconv_t)((uintptr_t)cd), (void *)inbuf, inbytesleft, outbuf, outbytesleft); + if (retCode == (size_t)-1) { + switch (errno) { + case E2BIG: + return SDL_ICONV_E2BIG; + case EILSEQ: + return SDL_ICONV_EILSEQ; + case EINVAL: + return SDL_ICONV_EINVAL; + default: + return SDL_ICONV_ERROR; + } + } + return retCode; +} + +#else + +/* Lots of useful information on Unicode at: + http://www.cl.cam.ac.uk/~mgk25/unicode.html +*/ + +#define UNICODE_BOM 0xFEFF + +#define UNKNOWN_ASCII '?' +#define UNKNOWN_UNICODE 0xFFFD + +enum +{ + ENCODING_UNKNOWN, + ENCODING_ASCII, + ENCODING_LATIN1, + ENCODING_UTF8, + ENCODING_UTF16, // Needs byte order marker + ENCODING_UTF16BE, + ENCODING_UTF16LE, + ENCODING_UTF32, // Needs byte order marker + ENCODING_UTF32BE, + ENCODING_UTF32LE, + ENCODING_UCS2BE, + ENCODING_UCS2LE, + ENCODING_UCS4BE, + ENCODING_UCS4LE, +}; +#if SDL_BYTEORDER == SDL_BIG_ENDIAN +#define ENCODING_UTF16NATIVE ENCODING_UTF16BE +#define ENCODING_UTF32NATIVE ENCODING_UTF32BE +#define ENCODING_UCS2NATIVE ENCODING_UCS2BE +#define ENCODING_UCS4NATIVE ENCODING_UCS4BE +#else +#define ENCODING_UTF16NATIVE ENCODING_UTF16LE +#define ENCODING_UTF32NATIVE ENCODING_UTF32LE +#define ENCODING_UCS2NATIVE ENCODING_UCS2LE +#define ENCODING_UCS4NATIVE ENCODING_UCS4LE +#endif + +struct SDL_iconv_data_t +{ + int src_fmt; + int dst_fmt; +}; + +static struct +{ + const char *name; + int format; +} encodings[] = { + /* *INDENT-OFF* */ // clang-format off + { "ASCII", ENCODING_ASCII }, + { "US-ASCII", ENCODING_ASCII }, + { "8859-1", ENCODING_LATIN1 }, + { "ISO-8859-1", ENCODING_LATIN1 }, +#if defined(SDL_PLATFORM_WINDOWS) || defined(SDL_PLATFORM_OS2) + { "WCHAR_T", ENCODING_UTF16LE }, +#else + { "WCHAR_T", ENCODING_UCS4NATIVE }, +#endif + { "UTF8", ENCODING_UTF8 }, + { "UTF-8", ENCODING_UTF8 }, + { "UTF16", ENCODING_UTF16 }, + { "UTF-16", ENCODING_UTF16 }, + { "UTF16BE", ENCODING_UTF16BE }, + { "UTF-16BE", ENCODING_UTF16BE }, + { "UTF16LE", ENCODING_UTF16LE }, + { "UTF-16LE", ENCODING_UTF16LE }, + { "UTF32", ENCODING_UTF32 }, + { "UTF-32", ENCODING_UTF32 }, + { "UTF32BE", ENCODING_UTF32BE }, + { "UTF-32BE", ENCODING_UTF32BE }, + { "UTF32LE", ENCODING_UTF32LE }, + { "UTF-32LE", ENCODING_UTF32LE }, + { "UCS2", ENCODING_UCS2BE }, + { "UCS-2", ENCODING_UCS2BE }, + { "UCS-2LE", ENCODING_UCS2LE }, + { "UCS-2BE", ENCODING_UCS2BE }, + { "UCS-2-INTERNAL", ENCODING_UCS2NATIVE }, + { "UCS4", ENCODING_UCS4BE }, + { "UCS-4", ENCODING_UCS4BE }, + { "UCS-4LE", ENCODING_UCS4LE }, + { "UCS-4BE", ENCODING_UCS4BE }, + { "UCS-4-INTERNAL", ENCODING_UCS4NATIVE }, +/* *INDENT-ON* */ // clang-format on +}; + +static const char *getlocale(char *buffer, size_t bufsize) +{ + const char *lang; + char *ptr; + + lang = SDL_getenv("LC_ALL"); + if (!lang) { + lang = SDL_getenv("LC_CTYPE"); + } + if (!lang) { + lang = SDL_getenv("LC_MESSAGES"); + } + if (!lang) { + lang = SDL_getenv("LANG"); + } + if (!lang || !*lang || SDL_strcmp(lang, "C") == 0) { + lang = "ASCII"; + } + + // We need to trim down strings like "en_US.UTF-8@blah" to "UTF-8" + ptr = SDL_strchr(lang, '.'); + if (ptr) { + lang = ptr + 1; + } + + SDL_strlcpy(buffer, lang, bufsize); + ptr = SDL_strchr(buffer, '@'); + if (ptr) { + *ptr = '\0'; // chop end of string. + } + + return buffer; +} + +SDL_iconv_t SDL_iconv_open(const char *tocode, const char *fromcode) +{ + int src_fmt = ENCODING_UNKNOWN; + int dst_fmt = ENCODING_UNKNOWN; + int i; + char fromcode_buffer[64]; + char tocode_buffer[64]; + + if (!fromcode || !*fromcode) { + fromcode = getlocale(fromcode_buffer, sizeof(fromcode_buffer)); + } + if (!tocode || !*tocode) { + tocode = getlocale(tocode_buffer, sizeof(tocode_buffer)); + } + for (i = 0; i < SDL_arraysize(encodings); ++i) { + if (SDL_strcasecmp(fromcode, encodings[i].name) == 0) { + src_fmt = encodings[i].format; + if (dst_fmt != ENCODING_UNKNOWN) { + break; + } + } + if (SDL_strcasecmp(tocode, encodings[i].name) == 0) { + dst_fmt = encodings[i].format; + if (src_fmt != ENCODING_UNKNOWN) { + break; + } + } + } + if (src_fmt != ENCODING_UNKNOWN && dst_fmt != ENCODING_UNKNOWN) { + SDL_iconv_t cd = (SDL_iconv_t)SDL_malloc(sizeof(*cd)); + if (cd) { + cd->src_fmt = src_fmt; + cd->dst_fmt = dst_fmt; + return cd; + } + } + return (SDL_iconv_t)-1; +} + +size_t SDL_iconv(SDL_iconv_t cd, + const char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ + // For simplicity, we'll convert everything to and from UCS-4 + const char *src; + char *dst; + size_t srclen, dstlen; + Uint32 ch = 0; + size_t total; + + if ((size_t)cd == SDL_ICONV_ERROR) { + return SDL_ICONV_ERROR; + } + if (!inbuf || !*inbuf) { + // Reset the context + return 0; + } + if (!outbuf || !*outbuf || !outbytesleft || !*outbytesleft) { + return SDL_ICONV_E2BIG; + } + src = *inbuf; + srclen = (inbytesleft ? *inbytesleft : 0); + dst = *outbuf; + dstlen = *outbytesleft; + + switch (cd->src_fmt) { + case ENCODING_UTF16: + // Scan for a byte order marker + { + Uint8 *p = (Uint8 *)src; + size_t n = srclen / 2; + while (n) { + if (p[0] == 0xFF && p[1] == 0xFE) { + cd->src_fmt = ENCODING_UTF16BE; + break; + } else if (p[0] == 0xFE && p[1] == 0xFF) { + cd->src_fmt = ENCODING_UTF16LE; + break; + } + p += 2; + --n; + } + if (n == 0) { + // We can't tell, default to host order + cd->src_fmt = ENCODING_UTF16NATIVE; + } + } + break; + case ENCODING_UTF32: + // Scan for a byte order marker + { + Uint8 *p = (Uint8 *)src; + size_t n = srclen / 4; + while (n) { + if (p[0] == 0xFF && p[1] == 0xFE && + p[2] == 0x00 && p[3] == 0x00) { + cd->src_fmt = ENCODING_UTF32BE; + break; + } else if (p[0] == 0x00 && p[1] == 0x00 && + p[2] == 0xFE && p[3] == 0xFF) { + cd->src_fmt = ENCODING_UTF32LE; + break; + } + p += 4; + --n; + } + if (n == 0) { + // We can't tell, default to host order + cd->src_fmt = ENCODING_UTF32NATIVE; + } + } + break; + } + + switch (cd->dst_fmt) { + case ENCODING_UTF16: + // Default to host order, need to add byte order marker + if (dstlen < 2) { + return SDL_ICONV_E2BIG; + } + *(Uint16 *)dst = UNICODE_BOM; + dst += 2; + dstlen -= 2; + cd->dst_fmt = ENCODING_UTF16NATIVE; + break; + case ENCODING_UTF32: + // Default to host order, need to add byte order marker + if (dstlen < 4) { + return SDL_ICONV_E2BIG; + } + *(Uint32 *)dst = UNICODE_BOM; + dst += 4; + dstlen -= 4; + cd->dst_fmt = ENCODING_UTF32NATIVE; + break; + } + + total = 0; + while (srclen > 0) { + // Decode a character + switch (cd->src_fmt) { + case ENCODING_ASCII: + { + Uint8 *p = (Uint8 *)src; + ch = (Uint32)(p[0] & 0x7F); + ++src; + --srclen; + } break; + case ENCODING_LATIN1: + { + Uint8 *p = (Uint8 *)src; + ch = (Uint32)p[0]; + ++src; + --srclen; + } break; + case ENCODING_UTF8: // RFC 3629 + { + Uint8 *p = (Uint8 *)src; + size_t left = 0; + bool overlong = false; + if (p[0] >= 0xF0) { + if ((p[0] & 0xF8) != 0xF0) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + } else { + if (p[0] == 0xF0 && srclen > 1 && (p[1] & 0xF0) == 0x80) { + overlong = true; + } + ch = (Uint32)(p[0] & 0x07); + left = 3; + } + } else if (p[0] >= 0xE0) { + if ((p[0] & 0xF0) != 0xE0) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + } else { + if (p[0] == 0xE0 && srclen > 1 && (p[1] & 0xE0) == 0x80) { + overlong = true; + } + ch = (Uint32)(p[0] & 0x0F); + left = 2; + } + } else if (p[0] >= 0xC0) { + if ((p[0] & 0xE0) != 0xC0) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + } else { + if ((p[0] & 0xDE) == 0xC0) { + overlong = true; + } + ch = (Uint32)(p[0] & 0x1F); + left = 1; + } + } else { + if (p[0] & 0x80) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + } else { + ch = (Uint32)p[0]; + } + } + ++src; + --srclen; + if (srclen < left) { + return SDL_ICONV_EINVAL; + } + while (left--) { + ++p; + if ((p[0] & 0xC0) != 0x80) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + break; + } + ch <<= 6; + ch |= (p[0] & 0x3F); + ++src; + --srclen; + } + if (overlong) { + /* Potential security risk + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + } + if ((ch >= 0xD800 && ch <= 0xDFFF) || + (ch == 0xFFFE || ch == 0xFFFF) || ch > 0x10FFFF) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + } + } break; + case ENCODING_UTF16BE: // RFC 2781 + { + Uint8 *p = (Uint8 *)src; + Uint16 W1, W2; + if (srclen < 2) { + return SDL_ICONV_EINVAL; + } + W1 = ((Uint16)p[0] << 8) | (Uint16)p[1]; + src += 2; + srclen -= 2; + if (W1 < 0xD800 || W1 > 0xDFFF) { + ch = (Uint32)W1; + break; + } + if (W1 > 0xDBFF) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + break; + } + if (srclen < 2) { + return SDL_ICONV_EINVAL; + } + p = (Uint8 *)src; + W2 = ((Uint16)p[0] << 8) | (Uint16)p[1]; + src += 2; + srclen -= 2; + if (W2 < 0xDC00 || W2 > 0xDFFF) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + break; + } + ch = (((Uint32)(W1 & 0x3FF) << 10) | + (Uint32)(W2 & 0x3FF)) + + 0x10000; + } break; + case ENCODING_UTF16LE: // RFC 2781 + { + Uint8 *p = (Uint8 *)src; + Uint16 W1, W2; + if (srclen < 2) { + return SDL_ICONV_EINVAL; + } + W1 = ((Uint16)p[1] << 8) | (Uint16)p[0]; + src += 2; + srclen -= 2; + if (W1 < 0xD800 || W1 > 0xDFFF) { + ch = (Uint32)W1; + break; + } + if (W1 > 0xDBFF) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + break; + } + if (srclen < 2) { + return SDL_ICONV_EINVAL; + } + p = (Uint8 *)src; + W2 = ((Uint16)p[1] << 8) | (Uint16)p[0]; + src += 2; + srclen -= 2; + if (W2 < 0xDC00 || W2 > 0xDFFF) { + /* Skip illegal sequences + return SDL_ICONV_EILSEQ; + */ + ch = UNKNOWN_UNICODE; + break; + } + ch = (((Uint32)(W1 & 0x3FF) << 10) | + (Uint32)(W2 & 0x3FF)) + + 0x10000; + } break; + case ENCODING_UCS2LE: + { + Uint8 *p = (Uint8 *)src; + if (srclen < 2) { + return SDL_ICONV_EINVAL; + } + ch = ((Uint32)p[1] << 8) | (Uint32)p[0]; + src += 2; + srclen -= 2; + } break; + case ENCODING_UCS2BE: + { + Uint8 *p = (Uint8 *)src; + if (srclen < 2) { + return SDL_ICONV_EINVAL; + } + ch = ((Uint32)p[0] << 8) | (Uint32)p[1]; + src += 2; + srclen -= 2; + } break; + case ENCODING_UCS4BE: + case ENCODING_UTF32BE: + { + Uint8 *p = (Uint8 *)src; + if (srclen < 4) { + return SDL_ICONV_EINVAL; + } + ch = ((Uint32)p[0] << 24) | + ((Uint32)p[1] << 16) | + ((Uint32)p[2] << 8) | (Uint32)p[3]; + src += 4; + srclen -= 4; + } break; + case ENCODING_UCS4LE: + case ENCODING_UTF32LE: + { + Uint8 *p = (Uint8 *)src; + if (srclen < 4) { + return SDL_ICONV_EINVAL; + } + ch = ((Uint32)p[3] << 24) | + ((Uint32)p[2] << 16) | + ((Uint32)p[1] << 8) | (Uint32)p[0]; + src += 4; + srclen -= 4; + } break; + } + + // Encode a character + switch (cd->dst_fmt) { + case ENCODING_ASCII: + { + Uint8 *p = (Uint8 *)dst; + if (dstlen < 1) { + return SDL_ICONV_E2BIG; + } + if (ch > 0x7F) { + *p = UNKNOWN_ASCII; + } else { + *p = (Uint8)ch; + } + ++dst; + --dstlen; + } break; + case ENCODING_LATIN1: + { + Uint8 *p = (Uint8 *)dst; + if (dstlen < 1) { + return SDL_ICONV_E2BIG; + } + if (ch > 0xFF) { + *p = UNKNOWN_ASCII; + } else { + *p = (Uint8)ch; + } + ++dst; + --dstlen; + } break; + case ENCODING_UTF8: // RFC 3629 + { + Uint8 *p = (Uint8 *)dst; + if (ch > 0x10FFFF) { + ch = UNKNOWN_UNICODE; + } + if (ch <= 0x7F) { + if (dstlen < 1) { + return SDL_ICONV_E2BIG; + } + *p = (Uint8)ch; + ++dst; + --dstlen; + } else if (ch <= 0x7FF) { + if (dstlen < 2) { + return SDL_ICONV_E2BIG; + } + p[0] = 0xC0 | (Uint8)((ch >> 6) & 0x1F); + p[1] = 0x80 | (Uint8)(ch & 0x3F); + dst += 2; + dstlen -= 2; + } else if (ch <= 0xFFFF) { + if (dstlen < 3) { + return SDL_ICONV_E2BIG; + } + p[0] = 0xE0 | (Uint8)((ch >> 12) & 0x0F); + p[1] = 0x80 | (Uint8)((ch >> 6) & 0x3F); + p[2] = 0x80 | (Uint8)(ch & 0x3F); + dst += 3; + dstlen -= 3; + } else { + if (dstlen < 4) { + return SDL_ICONV_E2BIG; + } + p[0] = 0xF0 | (Uint8)((ch >> 18) & 0x07); + p[1] = 0x80 | (Uint8)((ch >> 12) & 0x3F); + p[2] = 0x80 | (Uint8)((ch >> 6) & 0x3F); + p[3] = 0x80 | (Uint8)(ch & 0x3F); + dst += 4; + dstlen -= 4; + } + } break; + case ENCODING_UTF16BE: // RFC 2781 + { + Uint8 *p = (Uint8 *)dst; + if (ch > 0x10FFFF) { + ch = UNKNOWN_UNICODE; + } + if (ch < 0x10000) { + if (dstlen < 2) { + return SDL_ICONV_E2BIG; + } + p[0] = (Uint8)(ch >> 8); + p[1] = (Uint8)ch; + dst += 2; + dstlen -= 2; + } else { + Uint16 W1, W2; + if (dstlen < 4) { + return SDL_ICONV_E2BIG; + } + ch = ch - 0x10000; + W1 = 0xD800 | (Uint16)((ch >> 10) & 0x3FF); + W2 = 0xDC00 | (Uint16)(ch & 0x3FF); + p[0] = (Uint8)(W1 >> 8); + p[1] = (Uint8)W1; + p[2] = (Uint8)(W2 >> 8); + p[3] = (Uint8)W2; + dst += 4; + dstlen -= 4; + } + } break; + case ENCODING_UTF16LE: // RFC 2781 + { + Uint8 *p = (Uint8 *)dst; + if (ch > 0x10FFFF) { + ch = UNKNOWN_UNICODE; + } + if (ch < 0x10000) { + if (dstlen < 2) { + return SDL_ICONV_E2BIG; + } + p[1] = (Uint8)(ch >> 8); + p[0] = (Uint8)ch; + dst += 2; + dstlen -= 2; + } else { + Uint16 W1, W2; + if (dstlen < 4) { + return SDL_ICONV_E2BIG; + } + ch = ch - 0x10000; + W1 = 0xD800 | (Uint16)((ch >> 10) & 0x3FF); + W2 = 0xDC00 | (Uint16)(ch & 0x3FF); + p[1] = (Uint8)(W1 >> 8); + p[0] = (Uint8)W1; + p[3] = (Uint8)(W2 >> 8); + p[2] = (Uint8)W2; + dst += 4; + dstlen -= 4; + } + } break; + case ENCODING_UCS2BE: + { + Uint8 *p = (Uint8 *)dst; + if (ch > 0xFFFF) { + ch = UNKNOWN_UNICODE; + } + if (dstlen < 2) { + return SDL_ICONV_E2BIG; + } + p[0] = (Uint8)(ch >> 8); + p[1] = (Uint8)ch; + dst += 2; + dstlen -= 2; + } break; + case ENCODING_UCS2LE: + { + Uint8 *p = (Uint8 *)dst; + if (ch > 0xFFFF) { + ch = UNKNOWN_UNICODE; + } + if (dstlen < 2) { + return SDL_ICONV_E2BIG; + } + p[1] = (Uint8)(ch >> 8); + p[0] = (Uint8)ch; + dst += 2; + dstlen -= 2; + } break; + case ENCODING_UTF32BE: + if (ch > 0x10FFFF) { + ch = UNKNOWN_UNICODE; + } + SDL_FALLTHROUGH; + case ENCODING_UCS4BE: + if (ch > 0x7FFFFFFF) { + ch = UNKNOWN_UNICODE; + } + { + Uint8 *p = (Uint8 *)dst; + if (dstlen < 4) { + return SDL_ICONV_E2BIG; + } + p[0] = (Uint8)(ch >> 24); + p[1] = (Uint8)(ch >> 16); + p[2] = (Uint8)(ch >> 8); + p[3] = (Uint8)ch; + dst += 4; + dstlen -= 4; + } + break; + case ENCODING_UTF32LE: + if (ch > 0x10FFFF) { + ch = UNKNOWN_UNICODE; + } + SDL_FALLTHROUGH; + case ENCODING_UCS4LE: + if (ch > 0x7FFFFFFF) { + ch = UNKNOWN_UNICODE; + } + { + Uint8 *p = (Uint8 *)dst; + if (dstlen < 4) { + return SDL_ICONV_E2BIG; + } + p[3] = (Uint8)(ch >> 24); + p[2] = (Uint8)(ch >> 16); + p[1] = (Uint8)(ch >> 8); + p[0] = (Uint8)ch; + dst += 4; + dstlen -= 4; + } + break; + } + + // Update state + *inbuf = src; + *inbytesleft = srclen; + *outbuf = dst; + *outbytesleft = dstlen; + ++total; + } + return total; +} + +int SDL_iconv_close(SDL_iconv_t cd) +{ + if (cd == (SDL_iconv_t)-1) { + return -1; + } + SDL_free(cd); + return 0; +} + +#endif // !HAVE_ICONV + +char *SDL_iconv_string(const char *tocode, const char *fromcode, const char *inbuf, size_t inbytesleft) +{ + SDL_iconv_t cd; + char *string; + size_t stringsize; + char *outbuf; + size_t outbytesleft; + size_t retCode = 0; + + if (!tocode || !*tocode) { + tocode = "UTF-8"; + } + if (!fromcode || !*fromcode) { + fromcode = "UTF-8"; + } + cd = SDL_iconv_open(tocode, fromcode); + if (cd == (SDL_iconv_t)-1) { + return NULL; + } + + stringsize = inbytesleft; + string = (char *)SDL_malloc(stringsize + sizeof(Uint32)); + if (!string) { + SDL_iconv_close(cd); + return NULL; + } + outbuf = string; + outbytesleft = stringsize; + SDL_memset(outbuf, 0, sizeof(Uint32)); + + while (inbytesleft > 0) { + const size_t oldinbytesleft = inbytesleft; + retCode = SDL_iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft); + switch (retCode) { + case SDL_ICONV_E2BIG: + { + const ptrdiff_t diff = (ptrdiff_t) (outbuf - string); + char *oldstring = string; + stringsize *= 2; + string = (char *)SDL_realloc(string, stringsize + sizeof(Uint32)); + if (!string) { + SDL_free(oldstring); + SDL_iconv_close(cd); + return NULL; + } + outbuf = string + diff; + outbytesleft = stringsize - diff; + SDL_memset(outbuf, 0, sizeof(Uint32)); + continue; + } + case SDL_ICONV_EILSEQ: + // Try skipping some input data - not perfect, but... + ++inbuf; + --inbytesleft; + break; + case SDL_ICONV_EINVAL: + case SDL_ICONV_ERROR: + // We can't continue... + inbytesleft = 0; + break; + } + // Avoid infinite loops when nothing gets converted + if (oldinbytesleft == inbytesleft) { + break; + } + } + SDL_memset(outbuf, 0, sizeof(Uint32)); + SDL_iconv_close(cd); + + return string; +} -- cgit v1.2.3