/*
 *
 * Copyright 2023 Oleg Borodin  <borodin@unix7.org>
 *
 */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include <cstring.h>

#define INIT_CAPA 128

/* String container */
void* cstring_init(cstring_t* str) {
    size_t memsize = (INIT_CAPA + 1)*sizeof(char);
    str->data = malloc(memsize);
    if (str->data == NULL) return NULL;
    //memset(str->data, '\0', memsize);
    str->capa = INIT_CAPA;
    str->size = 0;
    str->data[str->size] = '\0';
    return str->data;
}


void* cstring_append(cstring_t* str, char* add) {
    size_t addsize = strlen(add);
    size_t newsize = str->size + addsize;
    if (newsize > str->capa) {
        size_t newcapa = (str->capa*24)/18 + addsize*3;
        char* newstr = realloc(str->data, (newcapa + 1)*sizeof(char));
        if (newstr == NULL) return NULL;
        str->data = newstr;
        str->capa = newcapa;
    }
    memcpy(&(str->data[str->size]), add, addsize);
    str->data[newsize] = '\0';
    str->size = newsize;
    return str->data;
}

char* cstring_getref(cstring_t* str) {
    return str->data;
}

void cstring_destroy(cstring_t* str) {
    if (str == NULL) return;
    free(str->data);
}