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main.c
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// Copyright (c) 2023 Cesanta Software Limited
// All rights reserved
#include <assert.h>
#include <float.h> // DBL_EPSILON and HUGE_VAL
#include <math.h> // NAN
#include <stdio.h> // printf/snprintf etc
#include <string.h> // strcmp
#include "str.h"
static int sf(const char *expected, const char *fmt, ...) {
char buf[100];
va_list ap;
int result;
va_start(ap, fmt);
xvsnprintf(buf, sizeof(buf), fmt, &ap);
va_end(ap);
result = strcmp(expected, buf) == 0;
if (!result) printf("[%s] != [%s]\n", expected, buf);
return result;
}
// This function compares micro_printf() with the libc's printf()
static int sn(const char *fmt, ...) {
char buf[100], tmp[1] = {0}, buf2[sizeof(buf)];
size_t n, n2, n1;
va_list ap;
int result;
va_start(ap, fmt);
n = (size_t) vsnprintf(buf2, sizeof(buf2), fmt, ap);
va_end(ap);
va_start(ap, fmt);
n1 = xvsnprintf(buf, sizeof(buf), fmt, &ap);
va_end(ap);
va_start(ap, fmt);
n2 = xvsnprintf(tmp, 0, fmt, &ap);
va_end(ap);
result = n1 == n2 && n1 == n && strcmp(buf, buf2) == 0;
if (!result)
printf("[%s] -> [%s] != [%s] %ld %ld %ld\n", fmt, buf, buf2, (long) n1,
(long) n2, (long) n);
return result;
}
static void test_std(void) {
assert(sn("%d", 0));
assert(sn("%d", 1));
assert(sn("%d", -1));
assert(sn("%.*s", 0, "ab"));
assert(sn("%.*s", 1, "ab"));
assert(sn("%.1s", "ab"));
assert(sn("%.99s", "a"));
assert(sn("%11s", "a"));
assert(sn("%s", "a\0b"));
assert(sn("%2s", "a"));
assert(sn("%.*s", 3, "a\0b"));
assert(sn("%d", 7));
assert(sn("%d", 123));
#if !defined(_MSC_VER)
assert(sn("%lld", (uint64_t) 0xffffffffff));
assert(sn("%lld", (uint64_t) -1));
assert(sn("%llu", (uint64_t) -1));
assert(sn("%llx", (uint64_t) 0xffffffffff));
assert(sn("%p", (void *) (size_t) 7));
#endif
assert(sn("%lx", (unsigned long) 0x6204d754));
assert(sn("ab"));
assert(sn("%dx", 1));
assert(sn("%sx", "a"));
assert(sn("%cx", 32));
assert(sn("%x", 15));
assert(sn("%2x", 15));
assert(sn("%02x", 15));
assert(sn("%hx:%hhx", (short) 1, (char) 2));
assert(sn("%hx:%hhx", (short) 1, (char) 2));
assert(sn("%%"));
assert(sn("%x", 15));
assert(sn("%#x", 15));
assert(sn("%#6x", 15));
assert(sn("%#06x", 15));
assert(sn("%#02x", 11));
assert(sn("%#-6x", 15));
assert(sn("%-2s!", "a"));
assert(sn("%s %s", "a", "b"));
assert(sn("%s %s", "a", "b"));
assert(sn("ab%dc", 123));
assert(sn("%s ", "a"));
assert(sn("%s %s", "a", "b"));
assert(sn("%2s %s", "a", "b"));
assert(sf("foo %v", "foo %v", 123)); // Uknown specifier left intact
}
static void test_float(void) {
char tmp[40];
#define DBLWIDTH(a, b) a, b
#define TEST_FLOAT(fmt_, num_, res_) \
do { \
const char *N = #num_; \
size_t n = xsnprintf(tmp, sizeof(tmp), fmt_, num_); \
if (0) printf("[%s] [%s] -> [%s] [%.*s]\n", fmt_, N, res_, (int) n, tmp); \
assert(n == strlen(res_)); \
assert(strcmp(tmp, res_) == 0); \
} while (0)
TEST_FLOAT("%g", 0.0, "0");
TEST_FLOAT("%g", 0.123, "0.123");
TEST_FLOAT("%g", 0.00123, "0.00123");
TEST_FLOAT("%g", 0.123456333, "0.123456");
TEST_FLOAT("%g", 123.0, "123");
TEST_FLOAT("%g", 11.5454, "11.5454");
TEST_FLOAT("%g", 11.0001, "11.0001");
TEST_FLOAT("%g", 0.999, "0.999");
TEST_FLOAT("%g", 0.999999, "0.999999");
TEST_FLOAT("%g", 0.9999999, "1");
TEST_FLOAT("%g", 10.9, "10.9");
TEST_FLOAT("%g", 10.01, "10.01");
TEST_FLOAT("%g", 1.0, "1");
TEST_FLOAT("%g", 10.0, "10");
TEST_FLOAT("%g", 100.0, "100");
TEST_FLOAT("%g", 1000.0, "1000");
TEST_FLOAT("%g", 10000.0, "10000");
TEST_FLOAT("%g", 100000.0, "100000");
TEST_FLOAT("%g", 1000000.0, "1e+06");
TEST_FLOAT("%g", 10000000.0, "1e+07");
TEST_FLOAT("%g", 100000001.0, "1e+08");
TEST_FLOAT("%g", 10.5454, "10.5454");
TEST_FLOAT("%g", 999999.0, "999999");
TEST_FLOAT("%g", 9999999.0, "1e+07");
TEST_FLOAT("%g", 44556677.0, "4.45567e+07");
TEST_FLOAT("%g", 1234567.2, "1.23457e+06");
TEST_FLOAT("%g", -987.65432, "-987.654");
TEST_FLOAT("%g", 0.0000000001, "1e-10");
TEST_FLOAT("%g", 2.34567e-57, "2.34567e-57");
TEST_FLOAT("%.*g", DBLWIDTH(7, 9999999.0), "9999999");
TEST_FLOAT("%.*g", DBLWIDTH(10, 0.123456333), "0.123456333");
TEST_FLOAT("%g", 123.456222, "123.456");
TEST_FLOAT("%.*g", DBLWIDTH(10, 123.456222), "123.456222");
TEST_FLOAT("%g", 600.1234, "600.123");
TEST_FLOAT("%g", -600.1234, "-600.123");
TEST_FLOAT("%g", 599.1234, "599.123");
TEST_FLOAT("%g", -599.1234, "-599.123");
#ifndef _WIN32
TEST_FLOAT("%g", (double) INFINITY, "inf");
TEST_FLOAT("%g", (double) -INFINITY, "-inf");
TEST_FLOAT("%g", (double) NAN, "nan");
#else
TEST_FLOAT("%g", HUGE_VAL, "inf");
TEST_FLOAT("%g", -HUGE_VAL, "-inf");
#endif
}
static void out(char ch, void *arg) {
putchar(ch);
(void) arg;
}
static void test_m(void) {
uint8_t mac[6] = {1, 2, 3, 4, 5, 6}; // MAC address
uint8_t ip6[16] = {1, 100, 33}; // IPv6 address
uint32_t ip4 = 0x0100007f; // IPv4 address
const char *esc = "_a\\nb_123"; // Expected escaped string
const char *quo = "_\"127.0.0.1\"_123"; // Expected quoted string
assert(sf("_127.0.0.1_123", "_%M_%d", fmt_ip4, &ip4, 123));
assert(sf("_[164:2100:0:0:0:0:0:0]_123", "_%M_%d", fmt_ip6, ip6, 123));
assert(sf("_01:02:03:04:05:06_123", "_%M_%d", fmt_mac, mac, 123));
assert(sf(esc, "_%M_%d", ESC("a\nb"), 123));
assert(sf("_eHl6_123", "_%M_%d", fmt_b64, 3, "xyz", 123));
assert(sf(quo, "_%m_%d", fmt_ip4, &ip4, 123));
assert(sf(quo, "_%m_%d", ESC("127.0.0.1"), 123));
xprintf(out, NULL, "%s: %g\n", "dbl", 1.234); // dbl: 1.234
xprintf(out, NULL, "%.*s\n", 3, "foobar"); // foo
xprintf(out, NULL, "%#04x\n", 11); // 0x0b
xprintf(out, NULL, "%d %5s\n", 7, "pad"); // 7 pad
// JSON: {"value": 1.234}
xprintf(out, NULL, "JSON: {%m: %g}\n", ESC("value"), 1.234);
}
static void test_json(void) {
char buf[100];
const char *json = "{ \"a\": -42, \"b\": \"hi\", \"c\": true }";
int b = 0;
assert(json_get_long(json, (int) strlen(json), "$.a", 0) == -42);
assert(json_get_str(json, (int) strlen(json), "$.b", buf, sizeof(buf)) == 2);
assert(strcmp(buf, "hi") == 0);
assert(json_get_bool(json, (int) strlen(json), "$.c", &b) == 1);
assert(b == 1);
}
int main(void) {
test_std();
test_float();
test_m();
test_json();
printf("SUCCESS\n");
return 0;
}