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libkernaux/examples/printf.c

34 lines
699 B
C

#include <kernaux/printf.h>
#include <assert.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#define BUFFER_SIZE 1024
static const char *const data = "foobar";
static char buffer[BUFFER_SIZE];
static size_t buffer_index = 0;
static void my_putchar(const char chr, void *arg)
{
assert(arg == data);
if (buffer_index >= BUFFER_SIZE) abort();
buffer[buffer_index++] = chr;
}
int main()
{
const int result = kernaux_printf(
my_putchar,
(char*)data,
"Hello, %s! Session ID: %u.",
"Alex",
123
);
assert((size_t)result == strlen(buffer));
assert(strcmp(buffer, "Hello, Alex! Session ID: 123.") == 0);
return 0;
}