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#include <stdio.h>
#include <string.h>
#include <assert.h>
struct format_test_cases {
const char *format;
const char *data;
int expected_int;
enum {
T_INT,
T_UINT,
T_CHAR,
T_NONE,
} type;
int ret;
} formats[] = {
{"%i", "0x420", 0x420, T_INT, 1},
{"%i", "0420", 0420, T_INT, 1},
{"%i", "420", 420, T_INT, 1},
{"%i", "-420", -420, T_INT, 1},
{"%d", "-12345", -12345, T_INT, 1},
{"%u", "69", 69, T_UINT, 1},
{"%u", "0420", 420, T_UINT, 1},
{"%o", "0420", 0420, T_UINT, 1},
{"%x", "0xCB7", 0xCB7, T_UINT, 1},
{"%%", "%", 0, T_NONE, 0},
{"%c", " I am not a fan of this solution.", ' ', T_CHAR, 1},
{" %c", " CBT (capybara therapy)", 'C', T_CHAR, 1},
};
#pragma GCC diagnostic ignored "-Wformat-security"
static void test_matrix() {
for(size_t i = 0; i < (sizeof(formats) / sizeof(*formats)); i++) {
struct format_test_cases *f = &formats[i];
int ret = -1;
int data_int;
unsigned int data_uint;
char data_char;
switch(f->type) {
case T_INT: {
ret = sscanf(f->data, f->format, &data_int);
assert(data_int == f->expected_int);
break;
}
case T_UINT: {
ret = sscanf(f->data, f->format, &data_uint);
assert(data_uint == (unsigned int) f->expected_int);
break;
}
case T_CHAR: {
ret = sscanf(f->data, f->format, &data_char);
assert(data_char == (unsigned char) f->expected_int);
break;
}
case T_NONE: {
ret = sscanf(f->data, f->format);
break;
}
}
assert(ret == f->ret);
}
}
int main() {
{
int x = 0;
char buf[] = "12345";
sscanf(buf, "%d", &x);
assert(x == 12345);
}
{
char c;
int n1;
int n2;
char buf[] = "z$ 7 5 440";;
int count = sscanf(buf, "%*c%c %d %*d %d", &c, &n1, &n2);
assert(count == 3);
assert(c == '$');
assert(n1 == 7);
assert(n2 == 440);
}
{
// From dsda-doom
char buf[] = "process_priority 0\n";
char def[80], strparm[128];
memset(def, '!', 80);
memset(strparm, '!', 128);
sscanf(buf, "%s %[^\n]\n", def, strparm);
assert(!strcmp(def, "process_priority"));
assert(!strcmp(strparm, "0"));
}
{
char buf[] = "fffff100";
unsigned long y = 0;
sscanf(buf, "%lx", &y);
assert(y == 0xfffff100);
}
#if !defined(__i386__)
{
char buf[] = "fffffffff100";
unsigned long y = 0;
sscanf(buf, "%lx", &y);
assert(y == 0xfffffffff100);
}
#endif
{
char buf[] = "410dc000";
unsigned long y = 0;
sscanf(buf, "%lx", &y);
assert(y == 0x410dc000);
}
{
// From webkitgtk
char buf[] = "MemTotal: 16299664 kB\n";
char token[51] = {0};
size_t amount = 0;
int ret = sscanf(buf, "%50s%zukB", token, &amount);
assert(ret == 2);
assert(!strcmp(token, "MemTotal:"));
assert(amount == 16299664);
}
{
char buf[] = "SIGINT";
int sig;
int ret = sscanf(buf, "%d", &sig);
assert(!ret);
}
test_matrix();
return 0;
}
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