Minor changes, still unfinished...

xtandard.c

@@ -521,7 +521,7 @@ int character_compare_array (char character, char * character_array) {
 }
 
 int string_length (char * string) {
-	int length = 0;
+	int length;
 
 	if (string == NULL) {
 		return (0);
@@ -532,29 +532,37 @@ int string_length (char * string) {
 	return (length);
 }
 
-void string_reverse (char * string) {
-	int i      = 0;
-	int length = 0;
+char * string_reverse_limit (char * string, int limit) {
+	int i;
 
 	fatal_failure (string == NULL, "string_reverse: String is null pointer.");
 
-	length = string_length (string);
-
-	for (i = 0; string [i] != '\0'; ++i) {
-		string [i] = string [length - i];
-	}
+	for (i = 0; i != limit / 2; ++i) {
+		char reverse_0 = string [limit - i];
+		char reverse_1 = string [i];
+		string [i] = reverse_0;
+		string [limit - i] = reverse_1;
 	}
 
-void string_delete (char * string, int length) {
+	return (string);
+}
+
+char * string_reverse (char * string) {
+	return (string_reverse_limit (string, string_length (string) - 1));
+}
+
+char * string_delete (char * string, int length) {
 	int i;
 
 	if ((string == NULL) || (length <= 0)) {
-		return;
+		return (string);
 	}
 
 	for (i = 0; i != length; ++i) {
 		string [i] = '\0';
 	}
+
+	return (string);
 }
 
 int string_compare (char * string_0, char * string_1) {
@@ -572,7 +580,7 @@ int string_compare (char * string_0, char * string_1) {
 	return (1);
 }
 
-void string_copy (char * string_0, char * string_1) {
+char * string_copy (char * string_0, char * string_1) {
 	int i = 0;
 
 	fatal_failure (string_0 == NULL, "string_copy: Destination string is null pointer.");
@@ -581,9 +589,11 @@ void string_copy (char * string_0, char * string_1) {
 	for (i = 0; i != string_length (string_1) + 1; ++i) {
 		string_0 [i] = string_1 [i];
 	}
+
+	return (string_0);
 }
 
-void string_concatenate (char * string_0, char * string_1) {
+char * string_concatenate (char * string_0, char * string_1) {
 	fatal_failure (string_0 == NULL, "string_concatenate: Destination string is null pointer.");
 	fatal_failure (string_1 == NULL, "string_concatenate: Source string is null pointer.");
 
@@ -596,6 +606,8 @@ void string_concatenate (char * string_0, char * string_1) {
 	}
 
 	* string_0 = '\0';
+
+	return (string_0);
 }
 
 int string_compare_limit (char * string_0, char * string_1, int limit) {
@@ -613,22 +625,24 @@ int string_compare_limit (char * string_0, char * string_1, int limit) {
 	return (1);
 }
 
-void string_copy_limit (char * string_0, char * string_1, int limit) {
+char * string_copy_limit (char * string_0, char * string_1, int limit) {
 	int i = 0;
 
 	fatal_failure (string_0 == NULL, "string_copy_limit: Destination string is null pointer.");
 	fatal_failure (string_1 == NULL, "string_copy_limit: Source string is null pointer.");
 
 	if (limit <= 0) {
-		return;
+		return (string_0);
 	}
 
 	for (i = 0; i != limit; ++i) {
 		string_0 [i] = string_1 [i];
 	}
+
+	return (string_0);
 }
 
-void string_concatenate_limit (char * string_0, char * string_1, int limit) {
+char * string_concatenate_limit (char * string_0, char * string_1, int limit) {
 	int i        = 0;
 	int length_0 = 0;
 	int length_1 = 0;
@@ -637,7 +651,7 @@ void string_concatenate_limit (char * string_0, char * string_1, int limit) {
 	fatal_failure (string_1 == NULL, "string_concatenate_limit: Source string is null pointer.");
 
 	if (limit <= 0) {
-		return;
+		return (string_0);
 	}
 
 	length_0 = string_length (string_0);
@@ -646,6 +660,8 @@ void string_concatenate_limit (char * string_0, char * string_1, int limit) {
 	for (i = 0; (i != length_1) && (i != limit); ++i) {
 		string_0 [length_0 + i] = string_1 [i];
 	}
+
+	return (string_0);
 }
 
 int string_split_space (char * string) {
@@ -767,4 +783,23 @@ char * decode_byte (int byte) {
 	return (decode);
 }
 
+void number_to_string (int number, char * string) {
+	int i;
+
+	if (number < 0) {
+		string [0] = '-';
+		++i;
+		number *= -1;
+	}
+
+	for (i = (string [0] == '-'); number != 0; ++i) {
+		string [i] = (char) (number % 10) + '0';
+		number /= 10;
+	}
+
+	string [i] = '\0';
+
+	string_reverse (string);
+}
+
 #endif

xtandard.h

@@ -104,17 +104,19 @@ extern int character_is_hexadecimal (char character);
 extern int character_compare_array (char character, char * character_array);
 
 extern int  string_length  (char * string);
-extern void string_reverse (char * string);
 
-extern void string_delete (char * string, int length);
+extern char * string_reverse_limit (char * string, int limit);
+extern char * string_reverse       (char * string);
+
+extern char * string_delete (char * string, int length);
 
 extern int    string_compare     (char * string_0, char * string_1);
-extern void string_copy        (char * string_0, char * string_1);
-extern void string_concatenate (char * string_0, char * string_1);
+extern char * string_copy        (char * string_0, char * string_1);
+extern char * string_concatenate (char * string_0, char * string_1);
 
 extern int    string_compare_limit     (char * string_0, char * string_1, int limit);
-extern void string_copy_limit        (char * string_0, char * string_1, int limit);
-extern void string_concatenate_limit (char * string_0, char * string_1, int limit);
+extern char * string_copy_limit        (char * string_0, char * string_1, int limit);
+extern char * string_concatenate_limit (char * string_0, char * string_1, int limit);
 
 extern int string_split_space (char * string);
 
@@ -131,4 +133,6 @@ extern void terminal_show_cursor (int show);
 extern int    encode_byte (char * byte);
 extern char * decode_byte (int    byte);
 
+extern void number_to_string (int number, char * string);
+
 #endif