examples: add parse_number_test.c

2 files changed, 111 insertions, 0 deletions

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 3a3b636..0157fe1 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -75,6 +75,7 @@ add_executable(substring_test substring_test.c)
 
 if (NOT WIN32)
     add_executable(ipaddr6_test ipaddr6_test.c)
+    add_executable(parse_number_test parse_number_test.c)
 endif ()
 
 if (BUILDING_RANDOM)
diff --git a/examples/parse_number_test.c b/examples/parse_number_test.c
new file mode 100644
index 0000000..08f6e33
--- /dev/null
+++ b/examples/parse_number_test.c
@@ -0,0 +1,110 @@
+/**
+ * @file parse_number_test.c
+ * @author Ambroz Bizjak <ambrop7@gmail.com>
+ * 
+ * @section LICENSE
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the
+ *    names of its contributors may be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <time.h>
+
+#include <misc/parse_number.h>
+#include <misc/debug.h>
+
+static void test_random (int num_digits, int digit_modulo)
+{
+    ASSERT(num_digits > 0);
+    ASSERT(digit_modulo > 0);
+    
+    uint8_t digits[40];
+    
+    for (int i = 0; i < num_digits; i++) {
+        digits[i] = '0' + (rand() % digit_modulo);
+    }
+    digits[num_digits] = '\0';
+    
+    char *endptr;
+    uintmax_t std_num = strtoumax((const char *)digits, &endptr, 10);
+    int std_res = !*endptr && !(std_num == UINTMAX_MAX && errno == ERANGE);
+    
+    uintmax_t num = 0;
+    int res = parse_unsigned_integer_bin((const char *)digits, num_digits, &num);
+    
+    if (res != std_res) {
+        printf("fail1 %s\n", (const char *)digits);
+        ASSERT_FORCE(0);
+    }
+    
+    if (res && num != std_num) {
+        printf("fail2 %s\n", (const char *)digits);
+        ASSERT_FORCE(0);
+    }
+}
+
+static void test_value (uintmax_t x)
+{
+    char str[40];
+    sprintf(str, "%" PRIuMAX, x);
+    uintmax_t y;
+    int res = parse_unsigned_integer_bin(str, strlen(str), &y);
+    ASSERT_FORCE(res);
+    ASSERT_FORCE(y == x);
+}
+
+static void test_value_range (uintmax_t start, uintmax_t count)
+{
+    uintmax_t i = start;
+    do {
+        test_value(i);
+        i++;
+    } while (i != start + count);
+}
+
+int main ()
+{
+    srand(time(NULL));
+    
+    for (int num_digits = 1; num_digits <= 22; num_digits++) {
+        for (int i = 0; i < 1000000; i++) {
+            test_random(num_digits, 10);
+        }
+        for (int i = 0; i < 1000000; i++) {
+            test_random(num_digits, 11);
+        }
+    }
+    
+    test_value_range(UINTMAX_C(0), 5000000);
+    test_value_range(UINTMAX_C(100000000), 5000000);
+    test_value_range(UINTMAX_C(258239003), 5000000);
+    test_value_range(UINTMAX_C(8241096180752634), 5000000);
+    test_value_range(UINTMAX_C(9127982390882308083), 5000000);
+    test_value_range(UINTMAX_C(18446744073700000000), 20000000);
+    
+    return 0;
+}