Util: Add strdup implementation for platforms without it

CMakeLists.txt

@@ -211,6 +211,7 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm.*")
 endif()
 
 include(CheckFunctionExists)
+check_function_exists(strdup HAVE_STRDUP)
 check_function_exists(strndup HAVE_STRNDUP)
 check_function_exists(snprintf_l HAVE_SNPRINTF_L)
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
@@ -223,6 +224,10 @@ check_function_exists(newlocale HAVE_NEWLOCALE)
 check_function_exists(freelocale HAVE_FREELOCALE)
 check_function_exists(uselocale HAVE_USELOCALE)
 
+if(HAVE_STRDUP)
+	add_definitions(-DHAVE_STRDUP)
+endif()
+
 if(HAVE_STRNDUP)
 	add_definitions(-DHAVE_STRNDUP)
 endif()

src/util/string.c

@@ -17,6 +17,16 @@ char* strndup(const char* start, size_t len) {
 }
 #endif
 
+#ifndef HAVE_STRDUP
+char* strdup(const char* str) {
+	size_t len = strlen(str);
+	char* out = malloc(len + 1);
+	strncpy(out, str, len);
+	out[len] = '\0';
+	return out;
+}
+#endif
+
 char* strnrstr(const char* restrict haystack, const char* restrict needle, size_t len) {
 	char* last = 0;
 	const char* next = haystack;

src/util/string.h

@@ -13,6 +13,10 @@
 char* strndup(const char* start, size_t len);
 #endif
 
+#ifndef strdup
+char* strdup(const char* str);
+#endif
+
 char* strnrstr(const char* restrict s1, const char* restrict s2, size_t len);
 
 int utfcmp(const uint16_t* utf16, const char* utf8, size_t utf16Length, size_t utf8Length);