3 * - By John Hodge (thePowersGang)
6 * - *scanf family of functions
14 typedef void (*printf_putch_t)(void *h, char ch);
17 void itoa(char *buf, uint64_t num, size_t base, int minLength, char pad, int bSigned);
21 * \fn EXPORT void vsnprintf(char *buf, const char *format, va_list args)
22 * \brief Prints a formatted string to a buffer
23 * \param buf Pointer - Destination Buffer
24 * \param format String - Format String
25 * \param args VarArgs List - Arguments
27 EXPORT int _vcprintf_int(printf_putch_t putch_cb, void *putch_h, const char *format, va_list args)
30 int c, minSize, precision, len;
35 int bLongLong, bPadLeft;
37 #define _addchar(ch) do { \
38 putch_cb(putch_h, ch); \
44 while((c = *format++) != 0)
46 // Non-control character
54 if(c == '%') { // Literal %
73 minSize = va_arg(args, size_t);
77 if('1' <= c && c <= '9')
80 while('0' <= c && c <= '9')
93 precision = va_arg(args, size_t);
96 else if('1' <= c && c <= '9')
99 while('0' <= c && c <= '9')
102 precision += c - '0';
108 // Check for long long
118 // Just help things along later
127 if(bLongLong) arg = va_arg(args, int64_t);
128 else arg = va_arg(args, int32_t);
129 itoa(tmp, arg, 10, minSize, pad, 1);
136 if(bLongLong) arg = va_arg(args, uint64_t);
137 else arg = va_arg(args, uint32_t);
138 itoa(tmp, arg, 10, minSize, pad, 0);
147 arg = va_arg(args, intptr_t);
148 itoa(tmp, arg, 16, minSize, pad, 0);
151 // Unsigned Hexadecimal
153 if(bLongLong) arg = va_arg(args, uint64_t);
154 else arg = va_arg(args, uint32_t);
155 itoa(tmp, arg, 16, minSize, pad, 0);
161 if(bLongLong) arg = va_arg(args, uint64_t);
162 else arg = va_arg(args, uint32_t);
163 itoa(tmp, arg, 8, minSize, pad, 0);
169 if(bLongLong) arg = va_arg(args, uint64_t);
170 else arg = va_arg(args, uint32_t);
171 itoa(tmp, arg, 2, minSize, pad, 0);
177 p = va_arg(args, char*);
180 //_SysDebug("vsnprintf: p = '%s'", p);
182 len = strnlen(p, precision);
185 if(bPadLeft) while(minSize > len++) _addchar(pad);
187 if(precision >= 0 && precision -- == 0)
191 if(!bPadLeft) while(minSize > len++) _addchar(pad);
194 // Unknown, just treat it as a character
196 arg = va_arg(args, uint32_t);
206 struct s_sprintf_info {
212 void _vsnprintf_putch(void *h, char ch)
214 struct s_sprintf_info *info = h;
215 if(info->ofs < info->maxlen)
216 info->dest[info->ofs++] = ch;
219 EXPORT int vsnprintf(char *__s, size_t __maxlen, const char *__format, va_list __args)
221 struct s_sprintf_info info = {__s, 0, __maxlen};
223 ret = _vcprintf_int(_vsnprintf_putch, &info, __format, __args);
224 _vsnprintf_putch(&info, '\0');
228 EXPORT int snprintf(char *buf, size_t maxlen, const char *format, ...)
232 va_start(args, format);
233 ret = vsnprintf((char*)buf, maxlen, (char*)format, args);
239 EXPORT int vsprintf(char * __s, const char *__format, va_list __args)
241 return vsnprintf(__s, 0x7FFFFFFF, __format, __args);
243 EXPORT int sprintf(char *buf, const char *format, ...)
247 va_start(args, format);
248 ret = vsprintf((char*)buf, (char*)format, args);
253 void _vfprintf_putch(void *h, char ch)
258 EXPORT int vfprintf(FILE *__fp, const char *__format, va_list __args)
260 return _vcprintf_int(_vfprintf_putch, __fp, __format, __args);
263 EXPORT int fprintf(FILE *fp, const char *format, ...)
269 va_start(args, format);
270 ret = vfprintf(fp, (char*)format, args);
276 EXPORT int vprintf(const char *__format, va_list __args)
278 return vfprintf(stdout, __format, __args);
281 EXPORT int printf(const char *format, ...)
287 va_start(args, format);
288 ret = vprintf(format, args);
295 const char cUCDIGITS[] = "0123456789ABCDEF";
297 * \brief Convert an integer into a character string
298 * \param buf Destination Buffer
299 * \param num Number to convert
300 * \param base Base-n number output
301 * \param minLength Minimum length of output
302 * \param pad Padding used to ensure minLength
303 * \param bSigned Signed number output?
305 EXPORT void itoa(char *buf, uint64_t num, size_t base, int minLength, char pad, int bSigned)
311 if(base > 16 || base < 2) {
316 if(bSigned && (int64_t)num < 0)
323 // Encode into reversed string
324 while(num > base-1) {
325 tmpBuf[pos++] = cUCDIGITS[ num % base ];
326 num = (uint64_t) num / (uint64_t)base; // Shift {number} right 1 digit
329 tmpBuf[pos++] = cUCDIGITS[ num % base ]; // Last digit of {number}
330 if(bSigned) tmpBuf[pos++] = '-'; // Append sign symbol if needed
334 while(minLength-- > 0) buf[i++] = pad;
335 while(pos-- > 0) buf[i++] = tmpBuf[pos]; // Reverse the order of characters