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util: Utility functions to print to a string buffer without overflowing.

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This commit is contained in:
José Fonseca 2008-08-09 11:51:29 +01:00
parent b65259de6c
commit 3e1974f94e
1 changed files with 37 additions and 0 deletions
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37
src/gallium/auxiliary/util/u_string.h
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@ -176,6 +176,43 @@ util_memmove(void *dest, const void *src, size_t n)
#endif
/**
* Printable string buffer
*/
struct util_strbuf
{
char *str;
char *ptr;
size_t left;
};
static INLINE void
util_strbuf_init(struct util_strbuf *sbuf, char *str, size_t size)
{
sbuf->str = str;
sbuf->str[0] = 0;
sbuf->ptr = sbuf->str;
sbuf->left = size;
}
static INLINE void
util_strbuf_printf(struct util_strbuf *sbuf, const char *format, ...)
{
if(sbuf->left > 1) {
size_t written;
va_list ap;
va_start(ap, format);
written = util_vsnprintf(sbuf->ptr, sbuf->left, format, ap);
va_end(ap);
sbuf->ptr += written;
sbuf->left -= written;
}
}
#ifdef __cplusplus
}
#endif