String.h

src/util/memory.c

@@ -27,6 +27,14 @@ void memoryCopy(void *dest, const void *src, const size_t size) {
   assertNotNull(src, "Cannot copy from NULL memory.");
   assertTrue(size > 0, "Cannot copy 0 bytes of memory.");
   assertTrue(dest != src, "Cannot copy memory to itself.");
+
+  // Check for overlapping regions
+  assertTrue(
+    ((uint8_t*)dest + size <= (uint8_t*)src) ||
+    ((uint8_t*)src + size <= (uint8_t*)dest),
+    "Source and destination memory regions overlap."
+  );
+
   memcpy(dest, src, size);
 }
 

src/util/string.c

@@ -51,12 +51,6 @@ void stringTrim(char_t *str) {
   if(start != str) memmove(str, start, end - start + 2);
 }
 
-char_t * stringToken(char_t *str, const char_t *delim) {
-  assertNotNull(str, "str must not be NULL");
-  assertNotNull(delim, "delim must not be NULL");
-  return strtok(str, delim);
-}
-
 char_t * stringFindLastChar(const char_t *str, const char_t c) {
   assertNotNull(str, "str must not be NULL");
   char_t *last = NULL;
@@ -106,12 +100,25 @@ bool_t stringToI32(const char_t *str, int32_t *out) {
   assertNotNull(str, "str must not be NULL");
   assertNotNull(out, "out must not be NULL");
 
+  // Empty string check
+  if(str[0] == '\0') return false;
+
+  // Leading or trailing whitespace check
+  if(stringIsWhitespace(str[0])) return false;
+  if(stringIsWhitespace(str[strlen(str) - 1])) return false;
+
   char_t *endptr;
   errno = 0;
   long int result = strtol(str, &endptr, 10);
   if(errno != 0 || *endptr != '\0') {
     return false;
   }
+
+  // Within INT32 range
+  if(result < INT32_MIN || result > INT32_MAX) {
+    return false;
+  }
+
   *out = (int32_t)result;
   return true;
 }
@@ -120,6 +127,13 @@ bool_t stringToI64(const char_t *str, int64_t *out) {
   assertNotNull(str, "str must not be NULL");
   assertNotNull(out, "out must not be NULL");
 
+  // Empty string check
+  if(str[0] == '\0') return false;
+
+  // Leading or trailing whitespace check
+  if(stringIsWhitespace(str[0])) return false;
+  if(stringIsWhitespace(str[strlen(str) - 1])) return false;
+
   char_t *endptr;
   errno = 0;
   long long int result = strtoll(str, &endptr, 10);
@@ -130,10 +144,38 @@ bool_t stringToI64(const char_t *str, int64_t *out) {
   return true;
 }
 
+bool_t stringToI16(const char_t *str, int16_t *out) {
+  assertNotNull(str, "str must not be NULL");
+  assertNotNull(out, "out must not be NULL");
+
+  // Empty string check
+  if(str[0] == '\0') return false;
+
+  // Leading or trailing whitespace check
+  if(stringIsWhitespace(str[0])) return false;
+  if(stringIsWhitespace(str[strlen(str) - 1])) return false;
+
+  char_t *endptr;
+  errno = 0;
+  long int result = strtol(str, &endptr, 10);
+  if(errno != 0 || *endptr != '\0' || result < INT16_MIN || result > INT16_MAX) {
+    return false;
+  }
+  *out = (int16_t)result;
+  return true;
+}
+
 bool_t stringToU16(const char_t *str, uint16_t *out) {
   assertNotNull(str, "str must not be NULL");
   assertNotNull(out, "out must not be NULL");
 
+  // Empty string check
+  if(str[0] == '\0') return false;
+
+  // Leading or trailing whitespace check
+  if(stringIsWhitespace(str[0])) return false;
+  if(stringIsWhitespace(str[strlen(str) - 1])) return false;
+
   char_t *endptr;
   errno = 0;
   unsigned long int result = strtoul(str, &endptr, 10);
@@ -148,6 +190,13 @@ bool_t stringToF32(const char_t *str, float_t *out) {
   assertNotNull(str, "str must not be NULL");
   assertNotNull(out, "out must not be NULL");
 
+  // Empty string check
+  if(str[0] == '\0') return false;
+
+  // Leading or trailing whitespace check
+  if(stringIsWhitespace(str[0])) return false;
+  if(stringIsWhitespace(str[strlen(str) - 1])) return false;
+
   char_t *endptr;
   errno = 0;
   float_t result = strtof(str, &endptr);

src/util/string.h

@@ -53,17 +53,6 @@ int stringCompareInsensitive(const char_t *str1, const char_t *str2);
  */
 void stringTrim(char_t *str);
 
-/**
- * Gets the next token in a string using a delimiter.
- * e.g. input: "Hello, World, Happy Monday!" with stringToken(input, ",") will
- * return "Hello" then " World" then " Happy Monday!" on each subsequent call.
- * 
- * @param str The string to split.
- * @param delim The delimiter to split by.
- * @return A pointer to the next token in the string.
- */
-char_t * stringToken(char_t *str, const char_t *delim);
-
 /**
  * Finds the last occurrence of a character in a string.
  * 
@@ -119,6 +108,15 @@ int32_t stringFormatVA(
  */
 bool_t stringToI32(const char_t *str, int32_t *out);
 
+/**
+ * Converts a string to a signed 64-bit integer.
+ * 
+ * @param str The string to convert.
+ * @param out The output signed integer.
+ * @return TRUE if the conversion was successful, FALSE otherwise.
+ */
+bool_t stringToI64(const char_t *str, int64_t *out);
+
 /**
  * Converts a string to a signed 16-bit integer.
  * 

test/util/CMakeLists.txt

@@ -7,4 +7,5 @@ include(dusktest)
 
 # Tests
 dusktest(test_math.c)
-dusktest(test_memory.c)
+dusktest(test_memory.c)
+dusktest(test_string.c)

test/util/test_math.c

@@ -37,6 +37,10 @@ static void test_mathNextPowTwo(void **state) {
 
   // Max Value
   assert_int_equal(mathNextPowTwo(0xFFFFFFFF), 1);
+
+  // Edge: value just below and above a power of two
+  assert_int_equal(mathNextPowTwo(255), 256);
+  assert_int_equal(mathNextPowTwo(257), 512);
 }
 
 static void test_mathMax(void **state) {
@@ -80,6 +84,13 @@ static void test_mathMax(void **state) {
   assert_float_equal(mathMax(-1.5f, 0), 0.0f, 0.0001f);
   assert_float_equal(mathMax(500, -333.5f), 500.0f, 0.0001f);
   assert_float_equal(mathMax(-333.5f, 500), 500.0f, 0.0001f);
+
+  // Equal values
+  assert_int_equal(mathMax(5, 5), 5);
+  assert_float_equal(mathMax(2.5f, 2.5f), 2.5f, 0.0001f);
+
+  // Special float values
+  assert_float_equal(mathMax(-0.0f, 0.0f), 0.0f, 0.0001f);
 }
 
 static void test_mathMin(void **state) {
@@ -124,6 +135,13 @@ static void test_mathMin(void **state) {
   assert_float_equal(mathMin(-1.5f, 0), -1.5f, 0.0001f);
   assert_float_equal(mathMin(500, -333.5f), -333.5f, 0.0001f);
   assert_float_equal(mathMin(-333.5f, 500), -333.5f, 0.0001f);
+
+  // Equal values
+  assert_int_equal(mathMin(5, 5), 5);
+  assert_float_equal(mathMin(2.5f, 2.5f), 2.5f, 0.0001f);
+
+  // Special float values
+  assert_float_equal(mathMin(-0.0f, 0.0f), -0.0f, 0.0001f);
 }
 
 static void test_mathClamp(void **state) {
@@ -172,6 +190,16 @@ static void test_mathClamp(void **state) {
   assert_float_equal(mathClamp(-5.5f, -10, -1), -5.5f, 0.0001f); // Within
   assert_float_equal(mathClamp(-15.5f, -10, -1), -10.0f, 0.0001f);// Below
   assert_float_equal(mathClamp(0.0f, -10, -1), -1.0f, 0.0001f); // Above
+
+  // Edge: value equals min or max
+  assert_int_equal(mathClamp(1, 1, 10), 1);
+  assert_int_equal(mathClamp(10, 1, 10), 10);
+  assert_float_equal(mathClamp(1.0f, 1.0f, 10.0f), 1.0f, 0.0001f);
+  assert_float_equal(mathClamp(10.0f, 1.0f, 10.0f), 10.0f, 0.0001f);
+
+  // Edge: min > max (undefined, but should return min or max)
+  assert_int_equal(mathClamp(5, 10, 1), 1); // Should clamp to upper
+  assert_float_equal(mathClamp(5.0f, 10.0f, 1.0f), 1.0f, 0.0001f);
 }
 
 static void test_mathAbs(void **state) {
@@ -192,6 +220,12 @@ static void test_mathAbs(void **state) {
   // Negative floats
   assert_float_equal(mathAbs(-5.5f), 5.5f, 0.0001f);
   assert_float_equal(mathAbs(-100.25f), 100.25f, 0.0001f);
+
+  // Edge: -0.0f
+  assert_float_equal(mathAbs(-0.0f), 0.0f, 0.0001f);
+
+  // INT_MIN edge case is NOT handled due to two's complement overflow
+  assert_int_equal(mathAbs(INT32_MIN + 1), 2147483647);
 }
 
 int main(int argc, char **argv) {

test/util/test_memory.c

@@ -65,6 +65,12 @@ static void test_memoryCopy(void **state) {
   // Cannot copy to itself
   expect_assert_failure(memoryCopy(src, src, size));
 
+  // Overlapping regions (should assert)
+  void *overlap = memoryAllocate(size * 2);
+  expect_assert_failure(memoryCopy((uint8_t*)overlap, (uint8_t*)overlap + 8, size));
+  expect_assert_failure(memoryCopy((uint8_t*)overlap + 8, (uint8_t*)overlap, size));
+  memoryFree(overlap);
+
   memoryFree(src);
   memoryFree(dest);
 }
@@ -91,6 +97,12 @@ static void test_memorySet(void **state) {
   // Canot set 0 bytes
   expect_assert_failure(memorySet(ptr, 0x00, 0));
 
+  // Set with value outside 0-255 (should be cast to uint8_t)
+  memorySet(ptr, 0x1FF, size);
+  for(size_t i = 0; i < size; i++) {
+    assert_int_equal(((uint8_t*)ptr)[i], 0xFF);
+  }
+
   memoryFree(ptr);
 }
 
@@ -139,6 +151,10 @@ static void test_memoryCopyRangeSafe(void **state) {
   uint8_t expected[10] = {3, 4, 5, 6, 7}; // Expected data in dest
   assert_memory_equal(dest, expected, 5);
 
+  // Copy entire buffer
+  memoryCopyRangeSafe(dest, src, (uint8_t*)src + size, size);
+  assert_memory_equal(dest, src, size);
+
   // Cannot copy to NULL destination
   expect_assert_failure(memoryCopyRangeSafe(NULL, src, (uint8_t*)src + 5, size));
   
@@ -187,6 +203,15 @@ static void test_memoryMove(void **state) {
   }
   assert_memory_equal(ptr, expected, size + 5);
 
+  // Overlap backward: move ptr[5..19] to ptr[0..14]
+  for(size_t i = 0; i < size + 5; i++) {
+    ((uint8_t*)ptr)[i] = (uint8_t)(i + 1);
+  }
+  memoryMove(ptr, (uint8_t*)ptr + 5, size);
+  for(size_t i = 0; i < size; i++) {
+    assert_int_equal(((uint8_t*)ptr)[i], (uint8_t)(i + 6));
+  }
+
   // Cannot move to NULL
   expect_assert_failure(memoryMove(NULL, ptr, size));
 
@@ -243,6 +268,9 @@ static void test_memoryCompare(void **state) {
   // Cannot compare 0 bytes
   expect_assert_failure(memoryCompare(a, b, 0));
 
+  // Compare different sizes (should assert, so we only test the API contract)
+  // Not possible with current API, as size is explicit, but document intent.
+
   memoryFree(a);
   memoryFree(b);
 }

test/util/test_string.c

@@ -0,0 +1,871 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+#include "util/string.h"
+
+static void test_stringIsWhitespace(void **state) {
+  (void)state;
+  assert_true(stringIsWhitespace(' '));    // Space is whitespace
+  assert_true(stringIsWhitespace('\t'));   // Tab is whitespace
+  assert_true(stringIsWhitespace('\n'));   // Newline is whitespace
+  assert_true(stringIsWhitespace('\r'));   // Carriage return is whitespace
+  assert_true(stringIsWhitespace('\v'));   // Vertical tab is whitespace
+  assert_true(stringIsWhitespace('\f'));   // Form feed is whitespace
+  assert_false(stringIsWhitespace('A'));    // 'A' is not whitespace
+  assert_false(stringIsWhitespace('1'));    // '1' is not whitespace
+  assert_false(stringIsWhitespace('_'));    // '_' is not whitespace
+  assert_false(stringIsWhitespace('-'));    // '-' is not whitespace
+}
+
+static void test_stringCopy(void **state) {
+  (void)state;
+  char dest[16];
+  stringCopy(dest, "hello", sizeof(dest));
+  assert_string_equal(dest, "hello"); // Normal copy
+
+  // Empty string
+  stringCopy(dest, "", sizeof(dest));
+  assert_string_equal(dest, ""); // Should copy empty string
+
+  // Euffer just fits
+  stringCopy(dest, "123456789012345", 16); // 15 chars + null
+  assert_string_equal(dest, "123456789012345"); // Should fit exactly
+
+  // Cannot copy from NULL source
+  expect_assert_failure(stringCopy(dest, NULL, sizeof(dest)));
+
+  // Cannot copy to NULL destination
+  expect_assert_failure(stringCopy(NULL, "hello", sizeof(dest)));
+
+  // Must have destSize > 0
+  expect_assert_failure(stringCopy(dest, "hello", 0));
+
+  // Must have destSize large enough for source
+  expect_assert_failure(stringCopy(dest, "this string is too long", 10));
+}
+
+static void test_stringCompare(void **state) {
+  (void)state;
+
+  // Check for equality
+  assert_int_equal(stringCompare("abc", "abc"), 0);
+  assert_int_equal(stringCompare("", ""), 0);
+  assert_int_equal(stringCompare("a", "a"), 0);
+  assert_int_equal(stringCompare("longer string", "longer string"), 0);
+
+  // Check for less than cases
+  assert_true(stringCompare("", "a") < 0);
+  assert_true(stringCompare("abc", "abd") < 0);
+
+  // Check for greater than cases
+  assert_true(stringCompare("abd", "abc") > 0);
+  assert_true(stringCompare("a", "") > 0);
+
+  // Cannot compare NULL strings
+  expect_assert_failure(stringCompare(NULL, "abc"));
+  expect_assert_failure(stringCompare("abc", NULL));
+}
+
+static void test_stringCompareInsensitive(void **state) {
+  (void)state;
+
+  assert_int_equal(stringCompareInsensitive("abc", "ABC"), 0);
+  assert_true(stringCompareInsensitive("abc", "abd") < 0);
+  assert_true(stringCompareInsensitive("abd", "abc") > 0);
+
+  assert_true(stringCompareInsensitive("", "A") < 0);
+  assert_true(stringCompareInsensitive("A", "") > 0);
+
+  // Cannot compare NULL strings
+  expect_assert_failure(stringCompareInsensitive(NULL, "abc"));
+  expect_assert_failure(stringCompareInsensitive("abc", NULL));
+}
+
+static void test_stringTrim(void **state) {
+  (void)state;
+
+  char buf[32];
+  stringCopy(buf, "   hello   ", sizeof(buf));
+
+  stringTrim(buf);
+  assert_string_equal(buf, "hello"); // Trims spaces
+
+  // Non-space whitespace
+  stringCopy(buf, "\t\nhello world\r\n", sizeof(buf));
+  stringTrim(buf);
+  assert_string_equal(buf, "hello world");
+
+  // Only whitespace
+  stringCopy(buf, "   ", sizeof(buf));
+  stringTrim(buf);
+  assert_string_equal(buf, "");
+
+  // No whitespace
+  stringCopy(buf, "no-trim", sizeof(buf));
+  stringTrim(buf);
+  assert_string_equal(buf, "no-trim");
+
+  // Left whitespace only
+  stringCopy(buf, "   left", sizeof(buf));
+  stringTrim(buf);
+  assert_string_equal(buf, "left");
+
+  // Right whitespace only
+  stringCopy(buf, "right   ", sizeof(buf));
+  stringTrim(buf);
+  assert_string_equal(buf, "right");
+
+  // Cannot trim NULL string
+  expect_assert_failure(stringTrim(NULL));
+
+  // Can trim empty string
+  stringCopy(buf, "", sizeof(buf));
+  stringTrim(buf);
+  assert_string_equal(buf, "");
+}
+
+static void test_stringFindLastChar(void **state) {
+  (void)state;
+
+  const char *str = "hello world";
+  char *result = stringFindLastChar(str, 'o');
+  assert_non_null(result);
+  assert_int_equal(*result, 'o');
+  assert_int_equal(result - str, 7); // Position of last 'o'
+
+  result = stringFindLastChar(str, 'h');
+  assert_non_null(result);
+  assert_int_equal(*result, 'h');
+  assert_int_equal(result - str, 0); // Position of 'h'
+
+  result = stringFindLastChar(str, 'z');
+  assert_null(result); // 'z' not found
+
+  // Cannot search NULL string
+  expect_assert_failure(stringFindLastChar(NULL, 'a'));
+}
+
+static void test_stringFormat(void **state) {
+  (void)state;
+
+  // Test a string format
+  char buffer[32];
+  int32_t len = stringFormat(buffer, sizeof(buffer), "Hello %s!", "World");
+  assert_int_equal(len, 12);
+  assert_string_equal(buffer, "Hello World!");
+
+  // Test a number format
+  len = stringFormat(buffer, sizeof(buffer), "Number: %d", 42);
+  assert_int_equal(len, 10);
+  assert_string_equal(buffer, "Number: 42");
+
+  // Test floats with different precision
+  len = stringFormat(buffer, sizeof(buffer), "Float: %.2f", 3.14159);
+  assert_int_equal(len, 11);
+  assert_string_equal(buffer, "Float: 3.14");
+
+  len = stringFormat(buffer, sizeof(buffer), "Float: %.4f", 3.14159);
+  assert_int_equal(len, 13);
+  assert_string_equal(buffer, "Float: 3.1416");
+
+  // Test integer formatting
+  len = stringFormat(buffer, sizeof(buffer), "Hex: 0x%X", 255);
+  assert_int_equal(len, 9);
+  assert_string_equal(buffer, "Hex: 0xFF");
+
+  // Test empty format
+  len = stringFormat(buffer, sizeof(buffer), "");
+  assert_int_equal(len, 0);
+  assert_string_equal(buffer, "");
+
+  // Test no substitutions
+  len = stringFormat(buffer, sizeof(buffer), "No substitutions");
+  assert_int_equal(len, 16);
+  assert_string_equal(buffer, "No substitutions");
+
+  // Test buffer too small
+  expect_assert_failure(stringFormat(buffer, 5, "This is too long"));
+  expect_assert_failure(stringFormat(buffer, sizeof(buffer), "Hello %s", "This string is way too long to fit within the buffer that we have allocated"));
+
+  // Test NULL destination, simply returns required length
+  len = stringFormat(NULL, 0, "Hello %s!", "World");
+  assert_int_equal(len, 12);
+
+  len = stringFormat(NULL, 0, "Number: %d", 42);
+  assert_int_equal(len, 10);
+
+  // Cannot have NULL format
+  expect_assert_failure(stringFormat(buffer, sizeof(buffer), NULL));
+
+  // Must have destSize > 0 if dest is not NULL
+  expect_assert_failure(stringFormat(buffer, 0, "Hello"));
+}
+
+static void test_stringToI32(void **state) {
+  (void)state;
+  
+  char_t buffer[64];
+  int32_t value;
+  bool_t result;
+
+  // Standard integers
+  stringCopy(buffer, "12345", sizeof(buffer));
+  assert_true(result = stringToI32(buffer, &value));
+  assert_int_equal(value, 12345);
+
+  stringCopy(buffer, "-6789", sizeof(buffer));
+  assert_true(result = stringToI32(buffer, &value));
+  assert_int_equal(value, -6789);
+
+  stringCopy(buffer, "+123", sizeof(buffer));
+  assert_true(result = stringToI32(buffer, &value));
+  assert_int_equal(value, 123);
+  
+  // Cannot convert invalid strings
+  stringCopy(buffer, "abc", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "123abc", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "   ", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "  123", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "123  ", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "   1234   ", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "+-123", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "\t123", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "12 34", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "--123", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "++123", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "+", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "-", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  // Non ascii numbers
+  stringCopy(buffer, "１２３４５", sizeof(buffer)); // Fullwidth digits
+  assert_false(result = stringToI32(buffer, &value));
+
+  // Cannot take math
+  stringCopy(buffer, "100+20", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "50-10", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "5*6", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "20/4", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  // Cannot handle decimal points
+  stringCopy(buffer, "12.34", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  // Cannot handle non-numbers
+  stringCopy(buffer, "12-34", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "e", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, " ", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "3.273390607896142e+150 ", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  stringCopy(buffer, "9999999999999999999999999", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+
+  // Cannot handle really low numbers
+  stringCopy(buffer, "-9999999999999999999999999", sizeof(buffer));
+  assert_false(result = stringToI32(buffer, &value));
+  
+  // Cannot handle items outside int32 range
+  stringCopy(buffer, "2147483648", sizeof(buffer)); // INT32_MAX + 1
+  assert_false(result = stringToI32(buffer, &value));
+  stringCopy(buffer, "-2147483649", sizeof(buffer)); // INT32_MIN - 1
+  assert_false(result = stringToI32(buffer, &value));
+
+  // CAN handle INT32 limits
+  stringCopy(buffer, "2147483647", sizeof(buffer)); // INT32_MAX
+  assert_true(result = stringToI32(buffer, &value));
+  assert_int_equal(value, 2147483647);
+  stringCopy(buffer, "-2147483648", sizeof(buffer)); // INT32_MIN
+  assert_true(result = stringToI32(buffer, &value));
+  assert_int_equal(value, -2147483648);
+
+  // Cannot have NULL string
+  expect_assert_failure(stringToI32(NULL, &value));
+
+  // Cannot have NULL output pointer
+  stringCopy(buffer, "123", sizeof(buffer));
+  expect_assert_failure(stringToI32(buffer, NULL));
+}
+
+static void test_stringToI64(void **state) {
+  (void)state;
+  
+  char_t buffer[64];
+  int64_t value;
+  bool_t result;
+
+  // Standard integers
+  stringCopy(buffer, "12345678901234", sizeof(buffer));
+  assert_true(result = stringToI64(buffer, &value));
+  assert_int_equal(value, 12345678901234LL);
+  stringCopy(buffer, "-67890123456789", sizeof(buffer));
+  assert_true(result = stringToI64(buffer, &value));
+  assert_int_equal(value, -67890123456789LL);
+
+  // Cannot convert invalid strings
+  stringCopy(buffer, "abc", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+  stringCopy(buffer, "123abc", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+  // Cannot convert invalid strings
+  stringCopy(buffer, "abc", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "123abc", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "   ", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "  123", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "123  ", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "   1234   ", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "+-123", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "\t123", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "12 34", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "--123", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "++123", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "+", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "-", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  // Non ascii numbers
+  stringCopy(buffer, "１２３４５", sizeof(buffer)); // Fullwidth digits
+  assert_false(result = stringToI64(buffer, &value));
+
+  // Cannot take math
+  stringCopy(buffer, "100+20", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "50-10", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "5*6", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "20/4", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  // Cannot handle decimal points
+  stringCopy(buffer, "12.34", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  // Cannot handle non-numbers
+  stringCopy(buffer, "12-34", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "e", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, " ", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "3.273390607896142e+150 ", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  stringCopy(buffer, "9999999999999999999999999", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+
+  // Cannot handle really low numbers
+  stringCopy(buffer, "-9999999999999999999999999", sizeof(buffer));
+  assert_false(result = stringToI64(buffer, &value));
+  
+  // Cannot handle items outside int64 range
+  stringCopy(buffer, "9223372036854775808", sizeof(buffer)); // INT64_MAX + 1
+  assert_false(result = stringToI64(buffer, &value));
+  stringCopy(buffer, "-9223372036854775809", sizeof(buffer)); // INT64_MIN - 1
+  assert_false(result = stringToI64(buffer, &value));
+
+  // CAN handle INT64 limits
+  stringCopy(buffer, "9223372036854775807", sizeof(buffer)); // INT64_MAX
+  assert_true(result = stringToI64(buffer, &value));
+  assert_int_equal(value, 9223372036854775807LL);
+  stringCopy(buffer, "-9223372036854775808", sizeof(buffer)); // INT64_MIN
+  assert_true(result = stringToI64(buffer, &value));
+  assert_int_equal(value, -9223372036854775808LL);
+
+  // Cannot have NULL string
+  expect_assert_failure(stringToI64(NULL, &value));
+
+  // Cannot have NULL output pointer
+  stringCopy(buffer, "123", sizeof(buffer));
+  expect_assert_failure(stringToI64(buffer, NULL));
+}
+
+static void test_stringToI16(void **state) {
+  (void)state;
+
+  char_t buffer[64];
+  int16_t value;
+  bool_t result;
+
+  // Standard integers (within int16 range)
+  stringCopy(buffer, "12345", sizeof(buffer));
+  assert_true(result = stringToI16(buffer, &value));
+  assert_int_equal(value, (int16_t)12345);
+
+  stringCopy(buffer, "-23456", sizeof(buffer));
+  assert_true(result = stringToI16(buffer, &value));
+  assert_int_equal(value, (int16_t)-23456);
+
+  // Cannot convert invalid strings
+  stringCopy(buffer, "abc", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "123abc", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "   ", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "  123", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "123  ", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "   1234   ", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "+-123", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "\t123", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "12 34", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "--123", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "++123", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "+", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "-", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  // Non-ascii numbers
+  stringCopy(buffer, "１２３４５", sizeof(buffer)); // Fullwidth digits
+  assert_false(result = stringToI16(buffer, &value));
+
+  // Cannot take math
+  stringCopy(buffer, "100+20", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "50-10", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "5*6", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "20/4", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  // Cannot handle decimal points
+  stringCopy(buffer, "12.34", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  // Cannot handle non-numbers / mixed formats
+  stringCopy(buffer, "12-34", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "e", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, " ", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  stringCopy(buffer, "3.273390607896142e+150 ", sizeof(buffer));
+  assert_false(result = stringToI16(buffer, &value));
+
+  // Out of int16 range (overflow)
+  stringCopy(buffer, "32768", sizeof(buffer)); // INT16_MAX + 1
+  assert_false(result = stringToI16(buffer, &value));
+
+  // Out of int16 range (underflow)
+  stringCopy(buffer, "-32769", sizeof(buffer)); // INT16_MIN - 1
+  assert_false(result = stringToI16(buffer, &value));
+
+  // CAN handle int16 limits
+  stringCopy(buffer, "32767", sizeof(buffer)); // INT16_MAX
+  assert_true(result = stringToI16(buffer, &value));
+  assert_int_equal(value, (int16_t)32767);
+
+  stringCopy(buffer, "-32768", sizeof(buffer)); // INT16_MIN
+  assert_true(result = stringToI16(buffer, &value));
+  assert_int_equal(value, (int16_t)-32768);
+
+  // Cannot have NULL string
+  expect_assert_failure(stringToI16(NULL, &value));
+
+  // Cannot have NULL output pointer
+  stringCopy(buffer, "123", sizeof(buffer));
+  expect_assert_failure(stringToI16(buffer, NULL));
+}
+
+static void test_stringToU16(void **state) {
+  (void)state;
+
+  char_t buffer[64];
+  uint16_t value;
+  bool_t result;
+
+  // Standard integers (within uint16 range)
+  stringCopy(buffer, "0", sizeof(buffer));
+  assert_true(result = stringToU16(buffer, &value));
+  assert_int_equal(value, (uint16_t)0);
+
+  stringCopy(buffer, "12345", sizeof(buffer));
+  assert_true(result = stringToU16(buffer, &value));
+  assert_int_equal(value, (uint16_t)12345);
+
+  // Cannot convert invalid strings
+  stringCopy(buffer, "abc", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "123abc", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "   ", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "  123", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "123  ", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "   1234   ", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "+-123", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "\t123", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "12 34", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "--123", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "++123", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "+", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  // Unsigned: no minus sign
+  stringCopy(buffer, "-", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "-1", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  // Non-ascii numbers
+  stringCopy(buffer, "１２３４５", sizeof(buffer)); // Fullwidth digits
+  assert_false(result = stringToU16(buffer, &value));
+
+  // Cannot take math
+  stringCopy(buffer, "100+20", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "50-10", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "5*6", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "20/4", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  // Cannot handle decimal points
+  stringCopy(buffer, "12.34", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  // Cannot handle non-numbers / mixed formats
+  stringCopy(buffer, "12-34", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "e", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, " ", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  stringCopy(buffer, "3.273390607896142e+150 ", sizeof(buffer));
+  assert_false(result = stringToU16(buffer, &value));
+
+  // Out of uint16 range (overflow)
+  stringCopy(buffer, "65536", sizeof(buffer)); // UINT16_MAX + 1
+  assert_false(result = stringToU16(buffer, &value));
+
+  // CAN handle uint16 limits
+  stringCopy(buffer, "65535", sizeof(buffer)); // UINT16_MAX
+  assert_true(result = stringToU16(buffer, &value));
+  assert_int_equal(value, (uint16_t)65535);
+
+  // Cannot have NULL string
+  expect_assert_failure(stringToU16(NULL, &value));
+
+  // Cannot have NULL output pointer
+  stringCopy(buffer, "123", sizeof(buffer));
+  expect_assert_failure(stringToU16(buffer, NULL));
+}
+
+static void test_stringToF32(void **state) {
+  (void)state;
+
+  char_t buffer[64];
+  float value;
+  bool_t result;
+
+  // Standard values
+  stringCopy(buffer, "0", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+  assert_float_equal(value, 0.0f, 0.000001f);
+
+  stringCopy(buffer, "123.5", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+  assert_float_equal(value, 123.5f, 0.000001f);
+
+  stringCopy(buffer, "-45.25", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+  assert_float_equal(value, -45.25f, 0.000001f);
+
+  stringCopy(buffer, "1.0", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+  assert_float_equal(value, 1.0f, 0.000001f);
+
+  // Integers should also parse
+  stringCopy(buffer, "42", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+  assert_float_equal(value, 42.0f, 0.000001f);
+
+  stringCopy(buffer, "-7", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+  assert_float_equal(value, -7.0f, 0.000001f);
+
+  // Cannot do European format
+  stringCopy(buffer, "123,45", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  // Cannot convert invalid strings
+  stringCopy(buffer, "abc", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "123abc", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, " ", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "   ", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, " 1.23", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "1.23 ", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "  1.23  ", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  // Invalid sign usage
+  stringCopy(buffer, "+-1.2", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "--1.2", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "++1.2", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "+", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "-", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  // Multiple decimal points
+  stringCopy(buffer, "1.2.3", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  // Non-ascii digits
+  stringCopy(buffer, "１２３．４５", sizeof(buffer)); // Fullwidth
+  assert_false(result = stringToF32(buffer, &value));
+
+  // Cannot take math
+  stringCopy(buffer, "1+2", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "5-3", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "2*3", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "6/2", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  // Scientific notation allowed
+  stringCopy(buffer, "1e3", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+
+  stringCopy(buffer, "3.4E10", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+
+  // Overflow (beyond float32 max)
+  stringCopy(buffer, "3.5e38", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  // Underflow (too small, magnitude)
+  stringCopy(buffer, "1e-50", sizeof(buffer));
+  assert_false(result = stringToF32(buffer, &value));
+
+  // Edge of float32 range (decimal form)
+  stringCopy(buffer, "340282346638528859811704183484516925440.0",
+             sizeof(buffer)); // ~FLT_MAX
+  assert_true(result = stringToF32(buffer, &value));
+
+  // Valid near-limits (implementation-dependent, keep conservative)
+  stringCopy(buffer, "3.4028234e38", sizeof(buffer));
+  assert_true(result = stringToF32(buffer, &value));
+
+  // Cannot have NULL string
+  expect_assert_failure(stringToF32(NULL, &value));
+
+  // Cannot have NULL output pointer
+  stringCopy(buffer, "1.23", sizeof(buffer));
+  expect_assert_failure(stringToF32(buffer, NULL));
+}
+
+static void test_stringEndsWith(void **state) {
+  (void)state;
+
+  assert_true(stringEndsWith("hello.c", ".c"));
+  assert_true(stringEndsWith("Hello World!", "World!"));
+
+  assert_false(stringEndsWith("document.pdf", ".doc"));
+  assert_false(stringEndsWith("image.jpeg", ".png"));
+  assert_false(stringEndsWith("short", "longer"));
+
+  // Cannot have NULL strings
+  expect_assert_failure(stringEndsWith(NULL, "world"));
+  expect_assert_failure(stringEndsWith("hello", NULL));
+}
+
+static void test_stringEndsWithCaseInsensitive(void **state) {
+  (void)state;
+  
+  assert_true(stringEndsWithCaseInsensitive("hello.C", ".c"));
+  assert_true(stringEndsWithCaseInsensitive("Hello World!", "world!"));
+  assert_false(stringEndsWithCaseInsensitive("document.pdf", ".DOC"));
+  assert_false(stringEndsWithCaseInsensitive("image.jpeg", ".PNG"));
+  assert_false(stringEndsWithCaseInsensitive("short", "LONGER"));
+
+  // Cannot have NULL strings
+  expect_assert_failure(stringEndsWithCaseInsensitive(NULL, "WORLD"));
+  expect_assert_failure(stringEndsWithCaseInsensitive("hello", NULL));
+}
+
+int main(int argc, char **argv) {
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_stringIsWhitespace),
+    cmocka_unit_test(test_stringCopy),
+    cmocka_unit_test(test_stringCompare),
+    cmocka_unit_test(test_stringCompareInsensitive),
+    cmocka_unit_test(test_stringTrim),
+    cmocka_unit_test(test_stringFindLastChar),
+    cmocka_unit_test(test_stringFormat),
+    cmocka_unit_test(test_stringToI32),
+    cmocka_unit_test(test_stringToI64),
+    cmocka_unit_test(test_stringToI16),
+    cmocka_unit_test(test_stringToU16),
+    cmocka_unit_test(test_stringToF32),
+    cmocka_unit_test(test_stringEndsWith),
+    cmocka_unit_test(test_stringEndsWithCaseInsensitive),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}