| 0,0 → 1,97 |
|---|
| /* |
| function for format output to the string. much lighter than standard sprintf |
| because of lesser formats supported |
| */ |
| |
| |
| #include <string.h> |
| //#include <stdio.h> |
| #include <ctype.h> |
| #include <stdarg.h> |
| |
| char* __itoa(int n,char* s); |
| char* itoab(unsigned int n, char* s, int b); |
| |
| int tiny_vsnprintf (char * s, size_t n, const char * format, va_list args ) |
| // support %c, %s, %d, %x, %u, %% for 32-bit values only. no width specs, left align |
| // always zero-ended |
| { |
| char *fmt, *dest, buf[32]; |
| fmt = (char*)format; |
| dest = s; dest[n - 1] = '\0'; |
| int arg, len; |
| while (*fmt && (dest - s < n - 1)) |
| { |
| if (*fmt != '%') |
| { |
| *dest++ = *fmt++; |
| continue; |
| } |
| if (fmt[1] == '%') // %% |
| { |
| *dest++ = '%'; |
| fmt += 2; |
| continue; |
| } |
| arg = va_arg(args, int); |
| len = n - 1 - (dest - s); |
| switch (*++fmt) |
| { |
| case 'c': |
| *dest++ = (char)arg; |
| break; |
| case 's': |
| strncpy(dest, (char*)arg, len); |
| dest = strchr(dest, 0); |
| break; |
| case 'd': |
| __itoa(arg, buf); |
| strncpy(dest, buf, len); |
| dest = strchr(dest, 0); |
| break; |
| case 'x': |
| itoab((unsigned)arg, buf, 16); |
| strncpy(dest, buf, len); |
| dest = strchr(dest, 0); |
| break; |
| case 'u': |
| itoab((unsigned)arg, buf, 10); |
| strncpy(dest, buf, len); |
| dest = strchr(dest, 0); |
| break; |
| default: |
| *dest++ = *fmt; |
| } |
| fmt++; |
| } |
| *dest = '\0'; |
| return dest - s; |
| } |
| |
| |
| int tiny_snprintf (char * s, size_t n, const char * format, ... ) |
| { |
| va_list arg; |
| int rc; |
| va_start(arg, format); |
| |
| rc = tiny_vsnprintf(s, n, format, arg); |
| |
| va_end(arg); |
| return rc; |
| } |
| |
| int tiny_sprintf (char * s, const char * format, ... ) |
| { |
| va_list arg; |
| int rc; |
| va_start(arg, format); |
| |
| rc = tiny_vsnprintf(s, 4096, format, arg); |
| |
| va_end(arg); |
| return rc; |
| } |
| |
| |
| |