CHORE: STR_INIT

CMakeLists.txt

@@ -1,12 +1,20 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 4.4.3)
+project(libstr LANGUAGES C)
 set(CMAKE_C_STANDARD 23)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
-include_directories(include)
-project(libstr LANGUAGES C)
 
-set(SOURCES
-	src/main.c
+add_library(libstr STATIC
+    src/string.c
+    # src/utils.c
+    # Add other modular string implementation units here as you expand:
 )
 
-add_executable(libstr ${SOURCES})
+target_include_directories(libstr
+        PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/include
+)
+
+add_executable(libstr_bin src/main.c)
+set_target_properties(libstr_bin PROPERTIES OUTPUT_NAME "libstr")
+target_link_libraries(libstr_bin PRIVATE libstr)

include/libstr/string.h

@@ -0,0 +1,62 @@
+#ifndef STRING_H
+#define STRING_H
+#include <stddef.h>
+#include <string.h>
+/* Functions to implement:
+charAt
+
+substring / slice
+
+concat
+
+equals / compareTo
+
+find / indexOf
+
+contains / includes
+
+isEmpty / isBlank
+
+replace
+
+split
+
+trim
+
+toLower / toLowerCase
+
+toUpper / toUpperCase
+
+startsWith
+
+endsWith
+
+replaceAll
+
+join
+ */
+
+#define STR_INIT { .data = "", .len = 0 };
+
+typedef struct
+{
+	char* data;
+	size_t len;
+} String;
+
+String
+strvmk(char* s);
+
+size_t
+strvlen(String s);
+
+char*
+strvget(String s);
+
+String
+strvreverse(String s);
+
+void
+strvfree(String s);
+
+#endif

src/main.c

@@ -1,6 +1,12 @@
+#include <libstr/string.h>
 #include <stdio.h>
 
-int main() {
-	printf("%s", "Hello World");
+int
+main()
+{
+	String hello = strvmk("Hello");
+	hello = strvreverse(hello);
+	printf("%s\n", strvget(hello));
+	strvfree(hello);
 	return 0;
 }

src/string.c

@@ -0,0 +1,58 @@
+#include <libstr/string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct String
+{
+	char* data;
+	size_t len;
+};
+
+String
+strvmk(char* s)
+{
+	size_t len = strlen(s);
+	String data = { .data = strdup(s), .len = len };
+	return data;
+}
+
+size_t
+strvlen(String s)
+{
+	return s.len;
+}
+
+char*
+strvget(String s)
+{
+	return s.data;
+}
+
+String
+strvreverse(String s)
+{
+	size_t n = strvlen(s);
+	char* data = malloc(n + 1);
+	memset(data, 0, strvlen(s));
+
+	int j = 0;
+	for (int i = n - 1; i >= 0; i--)
+	{
+		data[j] = s.data[i];
+		j++;
+	}
+	strvfree(s);
+
+	return strvmk(data);
+}
+
+void
+strvfree(String s)
+{
+	if (s.data)
+	{
+		free(s.data);
+		s.data = NULL;
+	}
+}