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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13 #define WRITE_STR(_fd, _str) write(_fd, _str, sizeof(_str))
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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 EXPORT void itoa(char *buf, uint64_t num, size_t base, int minLength, char pad, int bSigned);
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23 struct sFILE *get_file_struct();
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26 struct sFILE _iob[STDIO_MAX_STREAMS]; // IO Buffer
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27 struct sFILE *stdin; // Standard Input
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28 struct sFILE *stdout; // Standard Output
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29 struct sFILE *stderr; // Standard Error
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30 ///\note Initialised in SoMain
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33 int _fopen_modetoflags(const char *mode)
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40 case 'r': flags = FILE_FLAG_MODE_READ; break;
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41 case 'w': flags = FILE_FLAG_MODE_WRITE; break;
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42 case 'a': flags = FILE_FLAG_MODE_APPEND; break;
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43 case 'x': flags = FILE_FLAG_MODE_EXEC; break; // Acess addon
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50 for( ; *mode; mode ++ )
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54 case 'b': flags |= FILE_FLAG_M_BINARY; break;
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55 case '+': flags |= FILE_FLAG_M_EXT; break;
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65 * \fn FILE *freopen(char *file, char *mode, FILE *fp)
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67 EXPORT FILE *freopen(const char *file, const char *mode, FILE *fp)
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71 // Sanity Check Arguments
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72 if(!fp || !file || !mode) return NULL;
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79 fp->Flags = _fopen_modetoflags(mode);
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84 switch(fp->Flags & FILE_FLAG_MODE_MASK)
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87 case FILE_FLAG_MODE_READ:
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88 openFlags = OPENFLAG_READ;
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89 if(fp->Flags & FILE_FLAG_M_EXT)
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90 openFlags |= OPENFLAG_WRITE;
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93 case FILE_FLAG_MODE_WRITE:
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94 openFlags = OPENFLAG_WRITE;
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95 if(fp->Flags & FILE_FLAG_M_EXT)
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96 openFlags |= OPENFLAG_READ;
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99 case FILE_FLAG_MODE_APPEND:
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100 openFlags = OPENFLAG_APPEND;
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101 if(fp->Flags & FILE_FLAG_M_EXT)
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102 openFlags |= OPENFLAG_READ;
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105 case FILE_FLAG_MODE_EXEC:
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106 openFlags = OPENFLAG_EXEC;
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112 fp->FD = _SysReopen(fp->FD, file, openFlags);
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114 fp->FD = _SysOpen(file, openFlags);
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120 if( (fp->Flags & FILE_FLAG_MODE_MASK) == FILE_FLAG_MODE_APPEND ) {
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121 _SysSeek(fp->FD, 0, SEEK_END); //SEEK_END
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127 \fn FILE *fopen(const char *file, const char *mode)
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128 \brief Opens a file and returns the pointer
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129 \param file String - Filename to open
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130 \param mode Mode to open in
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132 EXPORT FILE *fopen(const char *file, const char *mode)
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136 // Sanity Check Arguments
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137 if(!file || !mode) return NULL;
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139 // Create Return Structure
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140 retFile = get_file_struct();
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142 return freopen(file, mode, retFile);
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145 EXPORT FILE *fmemopen(void *buffer, size_t length, const char *mode)
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149 if( !buffer || !mode ) return NULL;
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151 ret = get_file_struct();
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154 ret->Flags = _fopen_modetoflags(mode);
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155 if(ret->Flags == -1) {
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160 ret->Buffer = buffer;
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161 ret->BufferStart = 0;
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162 ret->BufferSize = length;
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167 EXPORT int fclose(FILE *fp)
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170 if( fp->FD != -1 ) {
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178 EXPORT void fflush(FILE *fp)
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180 if( !fp || fp->FD == -1 )
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183 if( !(fp->Flags & FILE_FLAG_DIRTY) )
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186 // Nothing to do for memory files
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191 EXPORT void clearerr(FILE *fp)
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193 if( !fp || fp->FD == -1 )
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196 // TODO: Impliment clearerr()
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199 EXPORT int feof(FILE *fp)
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201 if( !fp || fp->FD == -1 )
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203 return !!(fp->Flags & FILE_FLAG_EOF);
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206 EXPORT int ferror(FILE *fp)
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208 if( !fp || fp->FD == -1 )
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212 EXPORT int fileno(FILE *stream)
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217 EXPORT off_t ftell(FILE *fp)
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219 if(!fp || fp->FD == -1) return -1;
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224 return _SysTell(fp->FD);
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227 EXPORT int fseek(FILE *fp, long int amt, int whence)
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229 if(!fp || fp->FD == -1) return -1;
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231 if( fp->FD == -2 ) {
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241 if( fp->BufferSize < (size_t)amt )
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244 fp->Pos = fp->BufferSize - amt;
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247 if(fp->Pos > (off_t)fp->BufferSize) {
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248 fp->Pos = fp->BufferSize;
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249 fp->Flags |= FILE_FLAG_EOF;
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254 return _SysSeek(fp->FD, amt, whence);
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258 * \fn EXPORT size_t fwrite(void *ptr, size_t size, size_t num, FILE *fp)
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259 * \brief Write to a stream
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261 EXPORT size_t fwrite(const void *ptr, size_t size, size_t num, FILE *fp)
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265 if(!fp || fp->FD == -1)
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267 if( size == 0 || num == 0 )
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270 if( fp->FD == -2 ) {
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271 size_t avail = (fp->BufferSize - fp->Pos) / size;
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273 fp->Flags |= FILE_FLAG_EOF;
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274 if( num > avail ) num = avail;
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275 size_t bytes = num * size;
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276 memcpy((char*)fp->Buffer + fp->Pos, ptr, bytes);
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281 ret = _SysWrite(fp->FD, ptr, size*num);
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289 * \fn EXPORT size_t fread(void *ptr, size_t size, size_t num, FILE *fp)
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290 * \brief Read from a stream
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292 EXPORT size_t fread(void *ptr, size_t size, size_t num, FILE *fp)
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296 if(!fp || fp->FD == -1)
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298 if( size == 0 || num == 0 )
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301 if( fp->FD == -2 ) {
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302 size_t avail = (fp->BufferSize - fp->Pos) / size;
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304 fp->Flags |= FILE_FLAG_EOF;
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305 if( num > avail ) num = avail;
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306 size_t bytes = num * size;
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307 memcpy(ptr, (char*)fp->Buffer + fp->Pos, bytes);
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312 ret = _SysRead(fp->FD, ptr, size*num);
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313 if( ret == (size_t)-1)
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315 if( ret == 0 && size*num > 0 ) {
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316 fp->Flags |= FILE_FLAG_EOF;
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326 * \brief Write a string to a stream (without trailing \n)
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328 EXPORT int fputs(const char *s, FILE *fp)
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330 int len = strlen(s);
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331 return fwrite(s, 1, len, fp);
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335 * \brief Read a line (and possible trailing \n into a buffer)
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337 EXPORT char *fgets(char *s, int size, FILE *fp)
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341 while( ofs < size && ch != '\n' )
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343 if( fread(&ch, 1, 1, fp) != 1 )
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353 * \fn EXPORT int fputc(int c, FILE *fp)
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354 * \brief Write a single character to the stream
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356 EXPORT int fputc(int c, FILE *fp)
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358 return fwrite(&c, 1, 1, fp);
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361 EXPORT int putchar(int c)
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364 return _SysWrite(_stdout, &c, 1);
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368 * \fn EXPORT int fgetc(FILE *fp)
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369 * \brief Read a character from the stream
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371 EXPORT int fgetc(FILE *fp)
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374 if( fread(&ret, 1, 1, fp) != 1 )
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379 EXPORT int getchar(void)
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382 if(_SysRead(_stdin, &ret, 1) != 1) return -1;
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386 // --- INTERNAL ---
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388 * \fn FILE *get_file_struct()
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389 * \brief Returns a file descriptor structure
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391 FILE *get_file_struct()
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394 for(i=0;i<STDIO_MAX_STREAMS;i++)
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396 if(_iob[i].Flags & FILE_FLAG_ALLOC)
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398 _iob[i].Flags |= FILE_FLAG_ALLOC;
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406 EXPORT int puts(const char *str)
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413 len = _SysWrite(_stdout, str, len);
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414 _SysWrite(_stdout, "\n", 1);
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