80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Authors: spectral` //
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// NeoX //
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// //
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// Desc: sprintf()-related functions //
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//----------------------------------------------------------------------------//
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#include <kalbase.h>
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//
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// Format str according to fmt using ellipsed arguments
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//
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// BE CAREFUL when using this
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// you need to know for sure an overflow won't happen
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//
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int sprintf(char *str, const char *fmt, ...)
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{
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int ret;
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va_list ap;
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va_start(ap);
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ret = vsnprintf(str, SIZE_T_MAX, fmt, ap);
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va_end(ap);
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return ret;
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}
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int vsprintf(char *str, const char *fmt, va_list ap)
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{
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return vsnprintf(str, SIZE_T_MAX, fmt, ap);
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}
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//
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// (v)sprintf() but with a size limit: no more than n bytes are written in str
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// Always null-terminate str
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//
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int snprintf(char *str, size_t n, const char *fmt, ...)
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{
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int ret;
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va_list ap;
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va_start(ap);
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ret = vsnprintf(str, n, fmt, ap)
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va_end(ap);
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return ret;
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}
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int vsnprintf(char *str, size_t n, const char *fmt, va_list ap)
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{
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int ret = 0;
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//
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// Go throught the format string
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//
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while (*fmt) {
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if (*fmt != '%') {
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//
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// Even if we don't have any more room we still increase ret
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//
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if (ret++ < n) {
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*str++ = *fmt++;
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}
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continue;
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}
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switch (*fmt) {
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case 'd':
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default:
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break;
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}
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}
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return ret;
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}
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