| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org> |
| |
| 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 "geniconv.h" |
| #include <stdlib.h> |
| |
| int StrUTF8(int fToUTF8, char *pcDst, int cbDst, char *pcSrc, int cbSrc) |
| { |
| size_t rc; |
| char *pcDstStart = pcDst; |
| iconv_t cd; |
| char *pszToCP, *pszFromCP; |
| int fError = 0; |
| |
| if ( cbDst < 4 ) |
| return -1; |
| |
| if ( fToUTF8 ) |
| { |
| pszToCP = "UTF-8"; |
| pszFromCP = ""; |
| } |
| else |
| { |
| pszToCP = ""; |
| pszFromCP = "UTF-8"; |
| } |
| |
| cd = iconv_open( pszToCP, pszFromCP ); |
| if ( cd == (iconv_t)-1 ) |
| return -1; |
| |
| while( cbSrc > 0 ) |
| { |
| rc = iconv( cd, &pcSrc, (size_t *)&cbSrc, &pcDst, (size_t *)&cbDst ); |
| if ( rc == (size_t)-1 ) |
| { |
| if ( errno == EILSEQ ) |
| { |
| // Try to skip invalid character. |
| pcSrc++; |
| cbSrc--; |
| continue; |
| } |
| |
| fError = 1; |
| break; |
| } |
| } |
| |
| iconv_close( cd ); |
| |
| // Write trailing ZERO (1 byte for UTF-8, 2 bytes for the system cp). |
| if ( fToUTF8 ) |
| { |
| if ( cbDst < 1 ) |
| { |
| pcDst--; |
| fError = 1; // The destination buffer overflow. |
| } |
| *pcDst = '\0'; |
| } |
| else |
| { |
| if ( cbDst < 2 ) |
| { |
| pcDst -= ( cbDst == 0 ) ? 2 : 1; |
| fError = 1; // The destination buffer overflow. |
| } |
| *((short *)pcDst) = '\0'; |
| } |
| |
| return fError ? -1 : ( pcDst - pcDstStart ); |
| } |
| |
| char *StrUTF8New(int fToUTF8, char *pcStr, int cbStr) |
| { |
| int cbNewStr = ( ( cbStr > 4 ? cbStr : 4 ) + 1 ) * 2; |
| char *pszNewStr = malloc( cbNewStr ); |
| |
| if ( pszNewStr == NULL ) |
| return NULL; |
| |
| cbNewStr = StrUTF8( fToUTF8, pszNewStr, cbNewStr, pcStr, cbStr ); |
| if ( cbNewStr != -1 ) |
| { |
| pcStr = realloc( pszNewStr, cbNewStr + ( fToUTF8 ? 1 : sizeof(short) ) ); |
| if ( pcStr != NULL ) |
| return pcStr; |
| } |
| |
| free( pszNewStr ); |
| return NULL; |
| } |
| |
| void StrUTF8Free(char *pszStr) |
| { |
| free( pszStr ); |
| } |