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libkernaux/examples/printf_va.c

31 lines
622 B
C

#include <kernaux/printf.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#define BUFFER_SIZE 1024
static char buffer[BUFFER_SIZE];
static size_t buffer_index = 0;
static void my_putchar(const char chr)
{
if (buffer_index >= BUFFER_SIZE) abort();
buffer[buffer_index++] = chr;
}
static void my_printf(const char *const format, ...)
{
va_list va;
va_start(va, format);
kernaux_printf_va(my_putchar, format, va);
va_end(va);
}
int main()
{
my_printf("Hello, %s! Session ID: %u.", "Alex", 123);
assert(strcmp(buffer, "Hello, Alex! Session ID: 123.") == 0);
return 0;
}