2 * AcessOS Basic C Library
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6 #include <acess/sys.h>
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11 #include "stdio_int.h"
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15 #define DEBUG_BUILD 0
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17 // === CONSTANTS ===
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21 // === PROTOTYPES ===
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22 struct sFILE *get_file_struct();
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25 struct sFILE _iob[STDIO_MAX_STREAMS]; // IO Buffer
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26 struct sFILE *stdin; // Standard Input
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27 struct sFILE *stdout; // Standard Output
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28 struct sFILE *stderr; // Standard Error
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29 ///\note Initialised in SoMain
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30 static const int STDIN_BUFSIZ = 512;
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31 static const int STDOUT_BUFSIZ = 512;
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34 void _stdio_init(void)
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36 // Init FileIO Pointers
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39 stdin->Flags = FILE_FLAG_ALLOC|FILE_FLAG_MODE_READ|FILE_FLAG_LINEBUFFERED;
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40 stdin->Buffer = malloc(STDIN_BUFSIZ);
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41 stdin->BufferSpace = STDIN_BUFSIZ;
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45 stdout->Flags = FILE_FLAG_ALLOC|FILE_FLAG_MODE_WRITE|FILE_FLAG_LINEBUFFERED;
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46 stdout->Buffer = malloc(STDOUT_BUFSIZ);
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47 stdout->BufferSpace = STDOUT_BUFSIZ;
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51 stderr->Flags = FILE_FLAG_ALLOC|FILE_FLAG_MODE_WRITE;
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54 void _stdio_cleanup(void)
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57 for( i = 0; i < STDIO_MAX_STREAMS; i ++ )
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63 int _fopen_modetoflags(const char *mode)
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70 case 'r': flags = FILE_FLAG_MODE_READ; break;
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71 case 'w': flags = FILE_FLAG_MODE_WRITE; break;
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72 case 'a': flags = FILE_FLAG_MODE_APPEND; break;
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73 case 'x': flags = FILE_FLAG_MODE_EXEC; break; // Acess addon
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80 for( ; *mode; mode ++ )
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84 case 'b': flags |= FILE_FLAG_M_BINARY; break;
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85 case '+': flags |= FILE_FLAG_M_EXT; break;
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95 * \fn FILE *freopen(char *file, char *mode, FILE *fp)
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97 EXPORT FILE *freopen(const char *file, const char *mode, FILE *fp)
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101 // Sanity Check Arguments
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102 if(!fp || !file || !mode) return NULL;
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109 fp->Flags = _fopen_modetoflags(mode);
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110 if(fp->Flags == -1)
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114 switch(fp->Flags & FILE_FLAG_MODE_MASK)
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117 case FILE_FLAG_MODE_READ:
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118 openFlags = OPENFLAG_READ;
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119 if(fp->Flags & FILE_FLAG_M_EXT)
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120 openFlags |= OPENFLAG_WRITE;
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123 case FILE_FLAG_MODE_WRITE:
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124 openFlags = OPENFLAG_WRITE;
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125 if(fp->Flags & FILE_FLAG_M_EXT)
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126 openFlags |= OPENFLAG_READ;
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129 case FILE_FLAG_MODE_APPEND:
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130 openFlags = OPENFLAG_APPEND;
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131 if(fp->Flags & FILE_FLAG_M_EXT)
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132 openFlags |= OPENFLAG_READ;
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135 case FILE_FLAG_MODE_EXEC:
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136 openFlags = OPENFLAG_EXEC;
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142 fp->FD = _SysReopen(fp->FD, file, openFlags);
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144 fp->FD = _SysOpen(file, openFlags);
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150 if( (fp->Flags & FILE_FLAG_MODE_MASK) == FILE_FLAG_MODE_APPEND ) {
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151 _SysSeek(fp->FD, 0, SEEK_END); //SEEK_END
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157 \fn FILE *fopen(const char *file, const char *mode)
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158 \brief Opens a file and returns the pointer
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159 \param file String - Filename to open
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160 \param mode Mode to open in
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162 EXPORT FILE *fopen(const char *file, const char *mode)
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166 // Sanity Check Arguments
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167 if(!file || !mode) return NULL;
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169 // Create Return Structure
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170 retFile = get_file_struct();
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172 return freopen(file, mode, retFile);
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175 EXPORT FILE *fmemopen(void *buffer, size_t length, const char *mode)
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179 if( !buffer || !mode ) return NULL;
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181 ret = get_file_struct();
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184 ret->Flags = _fopen_modetoflags(mode);
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185 if(ret->Flags == -1) {
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190 ret->Buffer = buffer;
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191 ret->BufferPos = 0;
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192 ret->BufferSpace = length;
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197 EXPORT int fclose(FILE *fp)
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199 if( !(fp->Flags & FILE_FLAG_ALLOC) )
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202 if( fp->FD >= 0 ) {
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210 EXPORT int setvbuf(FILE *fp, char *buffer, int mode, size_t size)
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217 // Check for memory files
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218 if( fp->FD == -2 ) {
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223 // Not strictly needed, as this should only be called before any IO
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226 // Eliminate any pre-existing buffer
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228 free( fp->Buffer );
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230 fp->BufferSpace = 0;
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234 if( mode == _IONBF ) {
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235 // Do nothing, buffering was disabled above
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239 // Sanity check buffering mode before allocating
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240 if( mode != _IOLBF && mode != _IOFBF ) {
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244 // Allocate a buffer if one was not provided
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246 buffer = malloc(size);
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250 // Set buffer pointer and size
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251 fp->Buffer = buffer;
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252 fp->BufferSpace = size;
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255 if( mode == _IOLBF )
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256 fp->Flags |= FILE_FLAG_LINEBUFFERED;
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258 fp->Flags &= ~FILE_FLAG_LINEBUFFERED;
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264 int _fflush_int(FILE *fp)
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269 // Check the buffer contains data
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270 if( fp->BufferPos == 0 )
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273 switch(fp->Flags & FILE_FLAG_MODE_MASK)
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275 // Read - Flush input buffer
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276 case FILE_FLAG_MODE_READ:
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280 // Append - Seek to end and write
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281 case FILE_FLAG_MODE_APPEND:
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282 _SysSeek(fp->FD, fp->BufferOfs, SEEK_SET);
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283 len = _SysWrite(fp->FD, fp->Buffer, fp->BufferPos);
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284 if( len < fp->BufferPos )
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286 fp->BufferPos -= len;
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287 fp->BufferOfs = _SysTell(fp->FD);
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290 // Write - Write buffer
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291 case FILE_FLAG_MODE_WRITE:
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292 _SysDebug("Flushing to %i '%.*s'", fp->FD, fp->BufferPos, fp->Buffer);
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293 len = _SysWrite(fp->FD, fp->Buffer, fp->BufferPos);
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294 if( len != fp->BufferPos )
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296 fp->BufferPos -= len;
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304 EXPORT void fflush(FILE *fp)
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306 if( !fp || fp->FD == -1 )
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309 // Nothing to do for memory files
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316 EXPORT void clearerr(FILE *fp)
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318 if( !fp || fp->FD == -1 )
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321 // TODO: Impliment clearerr()
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324 EXPORT int feof(FILE *fp)
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326 if( !fp || fp->FD == -1 )
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328 return !!(fp->Flags & FILE_FLAG_EOF);
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331 EXPORT int ferror(FILE *fp)
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333 if( !fp || fp->FD == -1 )
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337 EXPORT int fileno(FILE *stream)
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342 EXPORT off_t ftell(FILE *fp)
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344 if(!fp || fp->FD == -1) return -1;
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349 return _SysTell(fp->FD);
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352 EXPORT int fseek(FILE *fp, long int amt, int whence)
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354 if(!fp || fp->FD == -1) return -1;
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356 if( fp->FD == -2 ) {
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366 if( fp->BufferSpace < (size_t)amt )
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369 fp->Pos = fp->BufferSpace - amt;
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372 if(fp->Pos > (off_t)fp->BufferSpace) {
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373 fp->Pos = fp->BufferSpace;
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374 fp->Flags |= FILE_FLAG_EOF;
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380 _SysSeek(fp->FD, amt, whence);
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381 fp->Pos = _SysTell(fp->FD);
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386 size_t _fwrite_unbuffered(FILE *fp, size_t size, size_t num, const void *data)
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388 size_t ret = 0, bytes;
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391 bytes = _SysWrite(fp->FD, data, size);
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392 if( bytes != size ) {
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393 _SysDebug("_fwrite_unbuffered: Oops, rollback %i/%i bytes!", bytes, size);
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394 _SysSeek(fp->FD, -bytes, SEEK_CUR);
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397 data = (char*)data + size;
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399 fp->Pos += ret * size;
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404 * \fn EXPORT size_t fwrite(void *ptr, size_t size, size_t num, FILE *fp)
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405 * \brief Write to a stream
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407 EXPORT size_t fwrite(const void *ptr, size_t size, size_t num, FILE *fp)
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411 if(!fp || fp->FD == -1)
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413 if( size == 0 || num == 0 )
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416 // Handle memory files first
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417 if( fp->FD == -2 ) {
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418 size_t avail = (fp->BufferSpace - fp->Pos) / size;
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420 fp->Flags |= FILE_FLAG_EOF;
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423 size_t bytes = num * size;
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424 memcpy(fp->Buffer + fp->Pos, ptr, bytes);
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429 switch( _GetFileMode(fp) )
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431 case FILE_FLAG_MODE_READ:
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432 case FILE_FLAG_MODE_EXEC:
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434 case FILE_FLAG_MODE_APPEND:
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435 fseek(fp, 0, SEEK_END);
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436 case FILE_FLAG_MODE_WRITE:
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437 if( fp->BufferSpace )
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439 // Buffering enabled
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440 if( fp->BufferSpace - fp->BufferPos < size*num )
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442 // If there's not enough space, flush and write-through
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443 _fflush_int(fp); // TODO: check ret
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444 ret = _fwrite_unbuffered(fp, size, num, ptr);
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446 else if( (fp->Flags & FILE_FLAG_LINEBUFFERED) && memchr(ptr,'\n',size*num) )
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448 // Newline present? Flush though
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449 _fflush_int(fp); // TODO: check ret
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450 ret = _fwrite_unbuffered(fp, size, num, ptr);
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455 memcpy( fp->Buffer + fp->BufferPos, ptr, size*num );
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456 fp->BufferPos += size*num;
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462 // Bufering disabled, write-though
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463 ret = _fwrite_unbuffered(fp, size, num, ptr);
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465 // errno should be set earlier
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473 * \fn EXPORT size_t fread(void *ptr, size_t size, size_t num, FILE *fp)
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474 * \brief Read from a stream
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476 EXPORT size_t fread(void *ptr, size_t size, size_t num, FILE *fp)
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480 if(!fp || fp->FD == -1)
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482 if( size == 0 || num == 0 )
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485 if( fp->FD == -2 ) {
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486 size_t avail = (fp->BufferSpace - fp->Pos) / size;
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488 fp->Flags |= FILE_FLAG_EOF;
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489 if( num > avail ) num = avail;
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490 size_t bytes = num * size;
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491 memcpy(ptr, fp->Buffer + fp->Pos, bytes);
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497 ret = _SysRead(fp->FD, ptr, size*num);
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498 if( ret == (size_t)-1)
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500 if( ret == 0 && size*num > 0 ) {
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501 fp->Flags |= FILE_FLAG_EOF;
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510 * \brief Write a string to a stream (without trailing \n)
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512 EXPORT int fputs(const char *s, FILE *fp)
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514 int len = strlen(s);
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515 return fwrite(s, 1, len, fp);
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519 * \brief Read a line (and possible trailing \n into a buffer)
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521 EXPORT char *fgets(char *s, int size, FILE *fp)
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525 while( ofs < size && ch != '\n' )
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527 if( fread(&ch, 1, 1, fp) != 1 )
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537 * \fn EXPORT int fputc(int c, FILE *fp)
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538 * \brief Write a single character to the stream
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540 EXPORT int fputc(int c, FILE *fp)
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542 return fwrite(&c, 1, 1, fp);
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545 EXPORT int putchar(int c)
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548 return _SysWrite(_stdout, &c, 1);
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552 * \fn EXPORT int fgetc(FILE *fp)
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553 * \brief Read a character from the stream
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555 EXPORT int fgetc(FILE *fp)
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558 if( fread(&ret, 1, 1, fp) != 1 )
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563 EXPORT int getchar(void)
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566 if(_SysRead(_stdin, &ret, 1) != 1) return -1;
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570 // --- INTERNAL ---
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572 * \fn FILE *get_file_struct()
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573 * \brief Returns a file descriptor structure
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575 FILE *get_file_struct()
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578 for(i=0;i<STDIO_MAX_STREAMS;i++)
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580 if(_iob[i].Flags & FILE_FLAG_ALLOC)
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582 _iob[i].Flags |= FILE_FLAG_ALLOC;
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590 EXPORT int puts(const char *str)
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597 len = _SysWrite(_stdout, str, len);
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598 _SysWrite(_stdout, "\n", 1);
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