implemented Error struct

src/errors.c

@@ -1,10 +1,53 @@
 #include "tlibc/errors.h"
+#include "tlibc/string/StringBuilder.h"
 
 #define ERRMSG_LENGTH 1024
 
-char* _genErrorMessage(cstr file, i32 line, cstr func, char* msg, bool free_msg){
-    char* result = sprintf_malloc(1024, "[%s:%i] %s() throwed error: %s", file, line, func, msg);
-    if(free_msg)
-        free(msg);
-    return result;
+Error* Error_create(const char* msg, bool is_msg_on_heap, ErrorCallPos){
+    Error* e = (Error*)malloc(sizeof(Error));
+    e->msg = str_construct((char*)(void*)msg, strlen(msg), true);
+    e->is_msg_on_heap = is_msg_on_heap;
+    e->call_stack = List_alloc(ErrorCallPos, 1);
+    return e;
+}
+
+void Error_destroy(Error* e){
+    if(e->is_msg_on_heap)
+        free(e->msg.data);
+    free(e->call_stack.data);
+}
+
+void Error_addCallPos(Error* e, ErrorCallPos p){
+    List_push(&e->call_stack, ErrorCallPos, p);
+}
+
+str Error_toStr(Error* e){
+    u32 len = List_len(&e->call_stack, ErrorCallPos);
+    StringBuilder b = StringBuilder_alloc(e->msg.size + 80 * len);
+    
+    StringBuilder_append_str(&b, STR("Error: "));
+    StringBuilder_append_str(&b, e->msg);
+    for(u32 i = 0; i < len; i++){
+        ErrorCallPos* ep = (ErrorCallPos*)e->call_stack.data + i;
+        StringBuilder_append_str(&b, STR("\n  at "));
+        StringBuilder_append_str(&b, ep->file);
+        StringBuilder_append_char(&b, ':');
+        StringBuilder_append_i64(&b, ep->line);
+        StringBuilder_append_char(&b, ' ');
+        StringBuilder_append_str(&b, ep->func);
+        StringBuilder_append_str(&b, STR("()\n"));
+    }
+
+    return StringBuilder_getStr(&b);
+}
+
+
+void Error_printAndExit(Error* e){
+    Error_addCallPos(e, ErrorCallPos_here());\
+    str e_str = Error_toStr(e);
+    printfe("%s\n", e_str.data);
+    free(e_str.data);
+    Error_destroy(e);
+    free(e);
+    exit(111);
 }