2 * AcessOS Basic C Library
\r
6 #include <acess/sys.h>
\r
11 #include "stdio_int.h"
\r
15 #define DEBUG_BUILD 0
\r
17 // === CONSTANTS ===
\r
21 #define FD_NOTOPEN -1
\r
22 #define FD_MEMFILE -2
\r
23 #define FD_MEMSTREAM -3
\r
25 // === PROTOTYPES ===
\r
26 struct sFILE *get_file_struct();
\r
29 struct sFILE _iob[STDIO_MAX_STREAMS]; // IO Buffer
\r
30 struct sFILE *stdin; // Standard Input
\r
31 struct sFILE *stdout; // Standard Output
\r
32 struct sFILE *stderr; // Standard Error
\r
33 ///\note Initialised in SoMain
\r
34 static const int STDIN_BUFSIZ = 512;
\r
35 static const int STDOUT_BUFSIZ = 512;
\r
38 void _stdio_init(void)
\r
40 // Init FileIO Pointers
\r
43 stdin->Flags = FILE_FLAG_ALLOC|FILE_FLAG_MODE_READ|FILE_FLAG_LINEBUFFERED;
\r
44 stdin->Buffer = malloc(STDIN_BUFSIZ);
\r
45 stdin->BufferSpace = STDIN_BUFSIZ;
\r
49 stdout->Flags = FILE_FLAG_ALLOC|FILE_FLAG_MODE_WRITE|FILE_FLAG_LINEBUFFERED;
\r
50 stdout->Buffer = malloc(STDOUT_BUFSIZ);
\r
51 stdout->BufferSpace = STDOUT_BUFSIZ;
\r
55 stderr->Flags = FILE_FLAG_ALLOC|FILE_FLAG_MODE_WRITE;
\r
58 void _stdio_cleanup(void)
\r
61 for( i = 0; i < STDIO_MAX_STREAMS; i ++ )
\r
67 int _fopen_modetoflags(const char *mode)
\r
74 case 'r': flags = FILE_FLAG_MODE_READ; break;
\r
75 case 'w': flags = FILE_FLAG_MODE_WRITE; break;
\r
76 case 'a': flags = FILE_FLAG_MODE_APPEND; break;
\r
77 case 'x': flags = FILE_FLAG_MODE_EXEC; break; // Acess addon
\r
84 for( ; *mode; mode ++ )
\r
88 case 'b': flags |= FILE_FLAG_M_BINARY; break;
\r
89 case '+': flags |= FILE_FLAG_M_EXT; break;
\r
99 * \fn FILE *freopen(char *file, char *mode, FILE *fp)
\r
101 EXPORT FILE *freopen(const char *file, const char *mode, FILE *fp)
\r
105 // Sanity Check Arguments
\r
106 if(!fp || !file || !mode) return NULL;
\r
108 if(fp->FD != FD_NOTOPEN) {
\r
113 fp->Flags = _fopen_modetoflags(mode);
\r
114 if(fp->Flags == -1)
\r
118 switch(fp->Flags & FILE_FLAG_MODE_MASK)
\r
121 case FILE_FLAG_MODE_READ:
\r
122 openFlags = OPENFLAG_READ;
\r
123 if(fp->Flags & FILE_FLAG_M_EXT)
\r
124 openFlags |= OPENFLAG_WRITE;
\r
127 case FILE_FLAG_MODE_WRITE:
\r
128 openFlags = OPENFLAG_WRITE;
\r
129 if(fp->Flags & FILE_FLAG_M_EXT)
\r
130 openFlags |= OPENFLAG_READ;
\r
133 case FILE_FLAG_MODE_APPEND:
\r
134 openFlags = OPENFLAG_APPEND;
\r
135 if(fp->Flags & FILE_FLAG_M_EXT)
\r
136 openFlags |= OPENFLAG_READ;
\r
139 case FILE_FLAG_MODE_EXEC:
\r
140 openFlags = OPENFLAG_EXEC;
\r
145 if(fp->FD != FD_NOTOPEN)
\r
146 fp->FD = _SysReopen(fp->FD, file, openFlags);
\r
148 fp->FD = _SysOpen(file, openFlags);
\r
154 if( (fp->Flags & FILE_FLAG_MODE_MASK) == FILE_FLAG_MODE_APPEND ) {
\r
155 _SysSeek(fp->FD, 0, SEEK_END); //SEEK_END
\r
161 \fn FILE *fopen(const char *file, const char *mode)
\r
162 \brief Opens a file and returns the pointer
\r
163 \param file String - Filename to open
\r
164 \param mode Mode to open in
\r
166 EXPORT FILE *fopen(const char *file, const char *mode)
\r
170 // Sanity Check Arguments
\r
171 if(!file || !mode) return NULL;
\r
173 // Create Return Structure
\r
174 retFile = get_file_struct();
\r
176 return freopen(file, mode, retFile);
\r
179 EXPORT FILE *fmemopen(void *buffer, size_t length, const char *mode)
\r
183 if( !buffer || !mode ) return NULL;
\r
185 ret = get_file_struct();
\r
187 ret->FD = FD_MEMFILE;
\r
188 ret->Flags = _fopen_modetoflags(mode);
\r
189 if(ret->Flags == -1) {
\r
194 ret->Buffer = buffer;
\r
195 ret->BufferPos = 0;
\r
196 ret->BufferSpace = length;
\r
201 EXPORT FILE *open_memstream(char **bufferptr, size_t *lengthptr)
\r
203 FILE *ret = get_file_struct();
\r
204 ret->FD = FD_MEMSTREAM;
\r
205 ret->Flags = FILE_FLAG_MODE_WRITE;
\r
207 ret->Buffer = NULL;
\r
208 ret->BufferPos = 0;
\r
209 ret->BufferSpace = 0;
\r
210 ret->BufPtr = bufferptr;
\r
211 ret->LenPtr = lengthptr;
\r
216 EXPORT int fclose(FILE *fp)
\r
218 if( !(fp->Flags & FILE_FLAG_ALLOC) )
\r
221 if( fp->FD >= 0 ) {
\r
225 fp->FD = FD_NOTOPEN;
\r
229 EXPORT int setvbuf(FILE *fp, char *buffer, int mode, size_t size)
\r
236 // Check for memory files
\r
237 if( fp->FD == FD_MEMFILE || fp->FD == FD_MEMSTREAM ) {
\r
242 // Not strictly needed, as this should only be called before any IO
\r
245 // Eliminate any pre-existing buffer
\r
247 free( fp->Buffer );
\r
249 fp->BufferSpace = 0;
\r
253 if( mode == _IONBF ) {
\r
254 // Do nothing, buffering was disabled above
\r
258 // Sanity check buffering mode before allocating
\r
259 if( mode != _IOLBF && mode != _IOFBF ) {
\r
263 // Allocate a buffer if one was not provided
\r
265 buffer = malloc(size);
\r
269 // Set buffer pointer and size
\r
270 fp->Buffer = buffer;
\r
271 fp->BufferSpace = size;
\r
274 if( mode == _IOLBF )
\r
275 fp->Flags |= FILE_FLAG_LINEBUFFERED;
\r
277 fp->Flags &= ~FILE_FLAG_LINEBUFFERED;
\r
283 int _fflush_int(FILE *fp)
\r
288 // Check the buffer contains data
\r
289 if( fp->BufferPos == 0 )
\r
292 switch(fp->Flags & FILE_FLAG_MODE_MASK)
\r
294 // Read - Flush input buffer
\r
295 case FILE_FLAG_MODE_READ:
\r
299 // Append - Seek to end and write
\r
300 case FILE_FLAG_MODE_APPEND:
\r
301 _SysSeek(fp->FD, fp->BufferOfs, SEEK_SET);
\r
302 len = _SysWrite(fp->FD, fp->Buffer, fp->BufferPos);
\r
303 if( len < fp->BufferPos )
\r
305 fp->BufferPos -= len;
\r
306 fp->BufferOfs = _SysTell(fp->FD);
\r
309 // Write - Write buffer
\r
310 case FILE_FLAG_MODE_WRITE:
\r
311 //_SysDebug("Flushing to %i '%.*s'", fp->FD, fp->BufferPos, fp->Buffer);
\r
312 len = _SysWrite(fp->FD, fp->Buffer, fp->BufferPos);
\r
313 if( len != fp->BufferPos )
\r
315 fp->BufferPos -= len;
\r
323 EXPORT void fflush(FILE *fp)
\r
325 if( !fp || fp->FD == FD_NOTOPEN )
\r
328 // Nothing to do for memory files
\r
329 if( fp->FD == FD_MEMFILE )
\r
331 // Memory streams, update pointers
\r
332 if( fp->FD == FD_MEMSTREAM ) {
\r
333 *fp->BufPtr = fp->Buffer;
\r
334 *fp->LenPtr = fp->BufferPos;
\r
341 EXPORT void clearerr(FILE *fp)
\r
343 if( !fp || fp->FD == FD_NOTOPEN )
\r
346 // TODO: Impliment clearerr()
\r
349 EXPORT int feof(FILE *fp)
\r
351 if( !fp || fp->FD == FD_NOTOPEN )
\r
353 return !!(fp->Flags & FILE_FLAG_EOF);
\r
356 EXPORT int ferror(FILE *fp)
\r
358 if( !fp || fp->FD == FD_NOTOPEN )
\r
362 EXPORT int fileno(FILE *stream)
\r
367 EXPORT off_t ftell(FILE *fp)
\r
369 if(!fp || fp->FD == FD_NOTOPEN) {
\r
374 if( fp->FD == FD_MEMFILE || fp->FD == FD_MEMSTREAM )
\r
377 return _SysTell(fp->FD);
\r
380 int _fseek_memfile(FILE *fp, long int amt, int whence)
\r
391 if( fp->BufferSpace < (size_t)amt )
\r
394 fp->Pos = fp->BufferSpace - amt;
\r
397 if(fp->Pos > (off_t)fp->BufferSpace) {
\r
398 fp->Pos = fp->BufferSpace;
\r
399 fp->Flags |= FILE_FLAG_EOF;
\r
404 int _fseek_memstream(FILE *fp, long int amt, int whence)
\r
415 if( fp->BufferSpace < (size_t)amt )
\r
418 fp->Pos = fp->BufferSpace - amt;
\r
421 if(fp->Pos > (off_t)fp->BufferSpace) {
\r
422 fp->Pos = fp->BufferSpace;
\r
423 fp->Flags |= FILE_FLAG_EOF;
\r
428 EXPORT int fseek(FILE *fp, long int amt, int whence)
\r
430 if(!fp || fp->FD == FD_NOTOPEN) {
\r
435 if( fp->FD == FD_MEMFILE ) {
\r
436 return _fseek_memfile(fp, amt, whence);
\r
438 else if( fp->FD == FD_MEMSTREAM ) {
\r
439 return _fseek_memstream(fp, amt, whence);
\r
443 _SysSeek(fp->FD, amt, whence);
\r
444 fp->Pos = _SysTell(fp->FD);
\r
449 size_t _fwrite_unbuffered(FILE *fp, size_t size, size_t num, const void *data)
\r
451 size_t ret = 0, bytes;
\r
454 bytes = _SysWrite(fp->FD, data, size);
\r
455 if( bytes == (size_t)-1 ) {
\r
457 // TODO: Set error flag
\r
460 if( bytes != size ) {
\r
461 _SysDebug("_fwrite_unbuffered: Oops, rollback %i/%i bytes!", bytes, size);
\r
462 _SysSeek(fp->FD, -bytes, SEEK_CUR);
\r
465 data = (char*)data + size;
\r
467 fp->Pos += ret * size;
\r
471 size_t _fwrite_memfile(const void *ptr, size_t size, size_t num, FILE *fp)
\r
473 size_t avail = (fp->BufferSpace - fp->Pos) / size;
\r
475 fp->Flags |= FILE_FLAG_EOF;
\r
478 size_t bytes = num * size;
\r
479 memcpy(fp->Buffer + fp->Pos, ptr, bytes);
\r
484 size_t _fwrite_memstream(const void *ptr, size_t size, size_t num, FILE *fp)
\r
486 size_t bytes = size*num;
\r
487 // #1. Check if we need to expand
\r
488 if( fp->Pos + bytes > fp->BufferSpace )
\r
490 void *newbuf = realloc(fp->Buffer, fp->BufferSpace + bytes);
\r
495 fp->Buffer = newbuf;
\r
496 fp->BufferSpace = fp->Pos + bytes;
\r
498 // #2. Write (use the memfile code for that)
\r
499 return _fwrite_memfile(ptr, size, num, fp);
\r
503 * \fn EXPORT size_t fwrite(void *ptr, size_t size, size_t num, FILE *fp)
\r
504 * \brief Write to a stream
\r
506 EXPORT size_t fwrite(const void *ptr, size_t size, size_t num, FILE *fp)
\r
510 if(!fp || fp->FD == -1)
\r
512 if( size == 0 || num == 0 )
\r
515 switch( _GetFileMode(fp) )
\r
517 case FILE_FLAG_MODE_READ:
\r
518 case FILE_FLAG_MODE_EXEC:
\r
521 case FILE_FLAG_MODE_APPEND:
\r
522 fseek(fp, 0, SEEK_END);
\r
523 case FILE_FLAG_MODE_WRITE:
\r
524 // Handle memory files first
\r
525 if( fp->FD == FD_MEMFILE ) {
\r
526 return _fwrite_memfile(ptr, size, num, fp);
\r
528 else if( fp->FD == FD_MEMSTREAM ) {
\r
529 return _fwrite_memstream(ptr, size, num, fp);
\r
531 else if( fp->BufferSpace )
\r
533 // Buffering enabled
\r
534 if( fp->BufferSpace - fp->BufferPos < size*num )
\r
536 // If there's not enough space, flush and write-through
\r
537 _fflush_int(fp); // TODO: check ret
\r
538 ret = _fwrite_unbuffered(fp, size, num, ptr);
\r
540 else if( (fp->Flags & FILE_FLAG_LINEBUFFERED) && memchr(ptr,'\n',size*num) )
\r
542 // Newline present? Flush though
\r
543 _fflush_int(fp); // TODO: check ret
\r
544 ret = _fwrite_unbuffered(fp, size, num, ptr);
\r
549 memcpy( fp->Buffer + fp->BufferPos, ptr, size*num );
\r
550 fp->BufferPos += size*num;
\r
556 // Bufering disabled, write-though
\r
557 ret = _fwrite_unbuffered(fp, size, num, ptr);
\r
559 // errno should be set earlier
\r
566 size_t _fread_memfile(void *ptr, size_t size, size_t num, FILE *fp)
\r
568 size_t avail = (fp->BufferSpace - fp->Pos) / size;
\r
570 fp->Flags |= FILE_FLAG_EOF;
\r
571 if( num > avail ) num = avail;
\r
572 size_t bytes = num * size;
\r
573 memcpy(ptr, fp->Buffer + fp->Pos, bytes);
\r
579 size_t _fread_memstream(void *ptr, size_t size, size_t num, FILE *fp)
\r
587 * \fn EXPORT size_t fread(void *ptr, size_t size, size_t num, FILE *fp)
\r
588 * \brief Read from a stream
\r
590 EXPORT size_t fread(void *ptr, size_t size, size_t num, FILE *fp)
\r
594 if(!fp || fp->FD == -1)
\r
596 if( size == 0 || num == 0 )
\r
599 if( _GetFileMode(fp) != FILE_FLAG_MODE_READ ) {
\r
604 if( fp->FD == FD_MEMFILE ) {
\r
605 return _fread_memfile(ptr, size, num, fp);
\r
607 else if( fp->FD == FD_MEMSTREAM ) {
\r
608 //return _fread_memstream(ptr, size, num, fp);
\r
614 ret = _SysRead(fp->FD, ptr, size*num);
\r
615 if( ret == (size_t)-1)
\r
617 if( ret == 0 && size*num > 0 ) {
\r
618 fp->Flags |= FILE_FLAG_EOF;
\r
627 * \brief Write a string to a stream (without trailing \n)
\r
629 EXPORT int fputs(const char *s, FILE *fp)
\r
631 int len = strlen(s);
\r
632 return fwrite(s, 1, len, fp);
\r
636 * \brief Read a line (and possible trailing \n into a buffer)
\r
638 EXPORT char *fgets(char *s, int size, FILE *fp)
\r
642 while( ofs < size && ch != '\n' )
\r
644 if( fread(&ch, 1, 1, fp) != 1 )
\r
654 * \fn EXPORT int fputc(int c, FILE *fp)
\r
655 * \brief Write a single character to the stream
\r
657 EXPORT int fputc(int c, FILE *fp)
\r
659 return fwrite(&c, 1, 1, fp);
\r
662 EXPORT int putchar(int c)
\r
665 return _SysWrite(_stdout, &c, 1);
\r
669 * \fn EXPORT int fgetc(FILE *fp)
\r
670 * \brief Read a character from the stream
\r
672 EXPORT int fgetc(FILE *fp)
\r
675 if( fread(&ret, 1, 1, fp) != 1 )
\r
680 EXPORT int getchar(void)
\r
683 if(_SysRead(_stdin, &ret, 1) != 1) return -1;
\r
687 EXPORT int puts(const char *str)
\r
694 len = _SysWrite(_stdout, str, len);
\r
695 _SysWrite(_stdout, "\n", 1);
\r
699 // --- INTERNAL ---
\r
701 * \fn FILE *get_file_struct()
\r
702 * \brief Returns a file descriptor structure
\r
704 FILE *get_file_struct()
\r
707 for(i=0;i<STDIO_MAX_STREAMS;i++)
\r
709 if(_iob[i].Flags & FILE_FLAG_ALLOC)
\r
711 _iob[i].Flags |= FILE_FLAG_ALLOC;
\r