49 lines
941 B
C
49 lines
941 B
C
|
#include <stdio.h>
|
||
|
|
#include <strformat.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
struct FmtBuffer
|
||
|
|
{
|
||
|
|
char *pos;
|
||
|
|
size_t left;
|
||
|
|
};
|
||
|
|
|
||
|
|
static StrFormatResult
|
||
|
|
buffer_str(void *user_data, const char *data, unsigned int len)
|
||
|
|
{
|
||
|
|
struct FmtBuffer *buffer = (struct FmtBuffer*)user_data;
|
||
|
|
if (len >= buffer->left) {
|
||
|
|
len = buffer->left;
|
||
|
|
len--;
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(buffer->pos, data, len);
|
||
|
|
buffer->pos += len;
|
||
|
|
buffer->left -= len;
|
||
|
|
return STRFORMAT_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int snprintf(char *str, size_t size, const char *format, ...)
|
||
|
|
{
|
||
|
|
int res;
|
||
|
|
va_list ap;
|
||
|
|
va_start(ap, format);
|
||
|
|
res = vsnprintf(str, size, format, ap);
|
||
|
|
va_end(ap);
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
int vsnprintf(char *str, size_t size, const char *format, va_list ap)
|
||
|
|
{
|
||
|
|
struct FmtBuffer buffer;
|
||
|
|
StrFormatContext ctxt;
|
||
|
|
int res;
|
||
|
|
ctxt.write_str = buffer_str;
|
||
|
|
ctxt.user_data = &buffer;
|
||
|
|
buffer.pos = str;
|
||
|
|
buffer.left = size;
|
||
|
|
res = format_str_v(&ctxt, format, ap);
|
||
|
|
*buffer.pos = '\0';
|
||
|
|
return res;
|
||
|
|
}
|