str_destroy and str_free

README.md

@@ -3,21 +3,29 @@ C library with collections, strings, exceptions, io...
 
 
 ## Build
-1. Clone the repository.
+1. Clone this repository.
     ```
     git clone https://timerix.ddns.net/git/Timerix/tlibc.git
     ```
-2. Install [cbuild](https://timerix.ddns.net/git/Timerix/cbuild).
+
+2. Install [cbuild](https://timerix.ddns.net/git/Timerix/cbuild) version specified in `project.config`.
+
 3. Build static library
     ```
     cd tlibc
     cbuild build_static_lib_dbg
     ```
 
+
 ## Usage
-Include `tlibc/tlibc.h` and put this code at the beginning of `main()`.
-```
-    Deferral(32);
+```c
+#include "tlibc/tlibc.h"
+
+int main(){
+    Deferral(32); // reserve memory for 32 defers
     try_fatal_void(tlibc_init());
     Defer(tlibc_deinit());
+
+    Return 0; // call defers
+}
 ```

include/tlibc/errors.h

@@ -33,6 +33,16 @@ void Error_addCallPos(Error* e, ErrorCallPos p);
 str Error_toStr(Error* e);
 void Error_printAndExit(Error* e) ATTRIBUTE_NORETURN;
 
+/*
+Define in header, declare somewhere in source.
+Create a function like 
+```
+void init_your_lib() {
+    ErrorCodePage_register(YOUR_PAGE); 
+}
+```
+and call it in main().
+*/
 #define ErrorCodePage_name(name) ErrorCodePage_##name
 #define ErrorCodePage_declare(name) extern u16 ErrorCodePage_name(name);
 #define ErrorCodePage_define(name) u16 ErrorCodePage_name(name) = 0;
@@ -46,6 +56,7 @@ typedef enum TlibcError {
 ErrorCodePage_declare(TLIBC);
 ErrorCodePage_declare(LIBC_ERRNO);
 
+
 typedef struct Result_ {
     Error* error;
     union {

include/tlibc/string/str.h

@@ -24,8 +24,17 @@ static inline str str_from_cstr(cstr s_ptr){
     return str_construct((void*)s_ptr, strlen(s_ptr), true);
 }
 
-static inline void str_free(str s){
-    free(s.data);
+/// destroy str with .data allocated on heap
+static inline void str_destroy(str self){
+    free(self.data);
+}
+
+/// destroy str allocated on heap with .data allocated on heap
+static inline void str_free(str* self){
+    if(!self)
+        return;
+    free(self->data);
+    free(self);
 }
 
 static inline Array(char) str_castTo_Array_char(str s) {