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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34 * \fn FILE *freopen(char *file, char *mode, FILE *fp)
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36 EXPORT FILE *freopen(const char *file, const char *mode, FILE *fp)
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41 // Sanity Check Arguments
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42 if(!fp || !file || !mode) return NULL;
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52 case 'r': fp->Flags = FILE_FLAG_MODE_READ; break;
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53 case 'w': fp->Flags = FILE_FLAG_MODE_WRITE; break;
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54 case 'a': fp->Flags = FILE_FLAG_MODE_APPEND; break;
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55 case 'x': fp->Flags = FILE_FLAG_MODE_EXEC; break;
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60 for(i=1;mode[i];i++)
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64 case '+': fp->Flags |= FILE_FLAG_M_EXT;
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72 case 'r': openFlags = OPENFLAG_READ;
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73 if(fp->Flags & FILE_FLAG_M_EXT)
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74 openFlags |= OPENFLAG_WRITE;
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77 case 'w': openFlags = OPENFLAG_WRITE;
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78 if(fp->Flags & FILE_FLAG_M_EXT)
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79 openFlags |= OPENFLAG_READ;
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82 case 'x': openFlags = OPENFLAG_EXEC;
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88 fp->FD = reopen(fp->FD, file, openFlags);
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90 fp->FD = open(file, openFlags);
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96 if(mode[0] == 'a') {
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97 seek(fp->FD, 0, SEEK_END); //SEEK_END
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103 \fn FILE *fopen(const char *file, const char *mode)
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104 \brief Opens a file and returns the pointer
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105 \param file String - Filename to open
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106 \param mode Mode to open in
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108 EXPORT FILE *fopen(const char *file, const char *mode)
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112 // Sanity Check Arguments
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113 if(!file || !mode) return NULL;
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115 // Create Return Structure
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116 retFile = get_file_struct();
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118 return freopen(file, mode, retFile);
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121 EXPORT int fclose(FILE *fp)
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129 EXPORT void fflush(FILE *fp)
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134 EXPORT off_t ftell(FILE *fp)
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136 if(!fp || !fp->FD) return -1;
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138 return tell(fp->FD);
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141 EXPORT int fseek(FILE *fp, long int amt, int whence)
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143 if(!fp || !fp->FD) return -1;
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145 return seek(fp->FD, amt, whence);
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150 * \fn EXPORT int vfprintf(FILE *fp, const char *format, va_list args)
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151 * \brief Print to a file from a variable argument list
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153 EXPORT int vfprintf(FILE *fp, const char *format, va_list args)
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158 if(!fp || !format) return -1;
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160 va_copy(tmpList, args);
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162 size = vsnprintf(NULL, 0, (char*)format, tmpList);
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164 vsnprintf(buf, size+1, (char*)format, args);
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167 write(fp->FD, buf, size);
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172 // Return written byte count
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177 * \fn int fprintf(FILE *fp, const char *format, ...)
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178 * \brief Print a formatted string to a stream
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180 EXPORT int fprintf(FILE *fp, const char *format, ...)
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186 va_start(args, format);
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187 ret = vfprintf(fp, (char*)format, args);
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194 * \fn EXPORT size_t fwrite(void *ptr, size_t size, size_t num, FILE *fp)
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195 * \brief Write to a stream
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197 EXPORT size_t fwrite(void *ptr, size_t size, size_t num, FILE *fp)
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200 if(!fp || !fp->FD) return -1;
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202 ret = write(fp->FD, ptr, size*num);
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208 * \fn EXPORT size_t fread(void *ptr, size_t size, size_t num, FILE *fp)
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209 * \brief Read from a stream
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211 EXPORT size_t fread(void *ptr, size_t size, size_t num, FILE *fp)
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214 if(!fp || !fp->FD) return -1;
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216 // TODO: Fit the spec better with the return value
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217 ret = read(fp->FD, ptr, size*num);
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223 * \fn EXPORT int fputc(int c, FILE *fp)
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224 * \brief Write a single character to the stream
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226 EXPORT int fputc(int c, FILE *fp)
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228 if(!fp || !fp->FD) return -1;
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229 return write(fp->FD, &c, 1);
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232 EXPORT int putchar(int c)
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235 return write(_stdout, &c, 1);
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239 * \fn EXPORT int fgetc(FILE *fp)
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240 * \brief Read a character from the stream
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242 EXPORT int fgetc(FILE *fp)
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246 if(read(fp->FD, &ret, 1) == -1) return -1;
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250 EXPORT int getchar(void)
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253 if(read(_stdin, &ret, 1) != 1) return -1;
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257 // --- INTERNAL ---
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259 * \fn FILE *get_file_struct()
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260 * \brief Returns a file descriptor structure
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262 FILE *get_file_struct()
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265 for(i=0;i<STDIO_MAX_STREAMS;i++)
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267 if(_iob[i].Flags == 0) return &_iob[i];
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272 EXPORT int puts(const char *str)
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279 len = write(_stdout, str, len);
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280 write(_stdout, "\n", 1);
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284 EXPORT int vsprintf(char * __s, const char *__format, va_list __args)
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286 return vsnprintf(__s, 0x7FFFFFFF, __format, __args);
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291 * \fn EXPORT void vsnprintf(char *buf, const char *format, va_list args)
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292 * \brief Prints a formatted string to a buffer
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293 * \param buf Pointer - Destination Buffer
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294 * \param format String - Format String
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295 * \param args VarArgs List - Arguments
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297 EXPORT int vsnprintf(char *buf, size_t __maxlen, const char *format, va_list args)
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300 int c, minSize, precision, len;
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305 int bLongLong, bPadLeft;
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307 void _addchar(char ch)
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309 if(buf && pos < __maxlen) buf[pos] = ch;
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315 while((c = *format++) != 0)
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317 // Non-control character
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323 // Control Character
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325 if(c == '%') { // Literal %
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336 // Padding Character
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344 minSize = va_arg(args, size_t);
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348 if('1' <= c && c <= '9')
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351 while('0' <= c && c <= '9')
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354 minSize += c - '0';
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364 precision = va_arg(args, size_t);
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367 else if('1' <= c && c <= '9')
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370 while('0' <= c && c <= '9')
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373 precision += c - '0';
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379 // Check for long long
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389 // Just help things along later
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396 case 'd': case 'i':
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398 if(bLongLong) arg = va_arg(args, int64_t);
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399 else arg = va_arg(args, int32_t);
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400 itoa(tmp, arg, 10, minSize, pad, 1);
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404 // Unsigned Integer
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407 if(bLongLong) arg = va_arg(args, uint64_t);
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408 else arg = va_arg(args, uint32_t);
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409 itoa(tmp, arg, 10, minSize, pad, 0);
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418 arg = va_arg(args, intptr_t);
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419 itoa(tmp, arg, 16, minSize, pad, 0);
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422 // Unsigned Hexadecimal
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424 if(bLongLong) arg = va_arg(args, uint64_t);
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425 else arg = va_arg(args, uint32_t);
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426 itoa(tmp, arg, 16, minSize, pad, 0);
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432 if(bLongLong) arg = va_arg(args, uint64_t);
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433 else arg = va_arg(args, uint32_t);
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434 itoa(tmp, arg, 8, minSize, pad, 0);
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440 if(bLongLong) arg = va_arg(args, uint64_t);
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441 else arg = va_arg(args, uint32_t);
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442 itoa(tmp, arg, 2, minSize, pad, 0);
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448 p = va_arg(args, char*);
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450 if(!p) p = "(null)";
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451 //_SysDebug("vsnprintf: p = '%s'", p);
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453 len = strnlen(p, precision);
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456 if(bPadLeft) while(minSize > len++) _addchar(pad);
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458 if(precision >= 0 && precision -- == 0)
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462 if(!bPadLeft) while(minSize > len++) _addchar(pad);
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465 // Unknown, just treat it as a character
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467 arg = va_arg(args, uint32_t);
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475 //_SysDebug("vsnprintf: buf = '%s'", buf);
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480 const char cUCDIGITS[] = "0123456789ABCDEF";
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482 * \fn static void itoa(char *buf, uint64_t num, int base, int minLength, char pad, int bSigned)
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483 * \brief Convert an integer into a character string
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484 * \param buf Destination Buffer
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485 * \param num Number to convert
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486 * \param base Base-n number output
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487 * \param minLength Minimum length of output
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488 * \param pad Padding used to ensure minLength
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489 * \param bSigned Signed number output?
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491 EXPORT void itoa(char *buf, uint64_t num, size_t base, int minLength, char pad, int bSigned)
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497 if(base > 16 || base < 2) {
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502 if(bSigned && (int64_t)num < 0)
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509 // Encode into reversed string
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510 while(num > base-1) {
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511 tmpBuf[pos++] = cUCDIGITS[ num % base ];
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512 num = (uint64_t) num / (uint64_t)base; // Shift {number} right 1 digit
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515 tmpBuf[pos++] = cUCDIGITS[ num % base ]; // Last digit of {number}
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516 if(bSigned) tmpBuf[pos++] = '-'; // Append sign symbol if needed
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520 while(minLength-- > 0) buf[i++] = pad;
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521 while(pos-- > 0) buf[i++] = tmpBuf[pos]; // Reverse the order of characters
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526 * \fn EXPORT int printf(const char *format, ...)
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527 * \brief Print a string to stdout
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529 EXPORT int printf(const char *format, ...)
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536 va_start(args, format);
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537 size = vsnprintf(NULL, 0, (char*)format, args);
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541 va_start(args, format);
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542 vsnprintf(buf, size+1, (char*)format, args);
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546 write(_stdout, buf, size+1);
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557 va_start(args, format);
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558 ret = fprintfv(stdout, (char*)format, args);
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565 * \fn EXPORT int sprintf(const char *buf, char *format, ...)
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566 * \brief Print a formatted string to a buffer
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568 EXPORT int sprintf(char *buf, const char *format, ...)
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572 va_start(args, format);
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573 ret = vsprintf((char*)buf, (char*)format, args);
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579 * \fn EXPORT int snprintf(const char *buf, size_t maxlen, char *format, ...)
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580 * \brief Print a formatted string to a buffer
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582 EXPORT int snprintf(char *buf, size_t maxlen, const char *format, ...)
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586 va_start(args, format);
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587 ret = vsnprintf((char*)buf, maxlen, (char*)format, args);
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