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dynamic_string.c
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dynamic_string.c
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/**
* @file dynamic_string.c
* @project Compiler of language IFJ18. School project for subjects IFJ and IAL.
* @brief Dynamic string for eazier handle of C strings.
* @date October 2018
* @author Juraj Holub <[email protected]>
*/
#include "dynamic_string.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "error_handle.h"
string_t string_create(char *str)
{
int size;
string_t string = malloc(sizeof(struct string_s));
if (string == NULL)
{
free(string);
mem_error();
return NULL;
}
if (str == NULL)
{
size = STRING_BLOCK;
string->strlen = 1;
}
else
{
string->strlen = strlen(str) + 1;
size = (string->strlen / STRING_BLOCK + 1) * STRING_BLOCK;
}
char* new_str = malloc(sizeof(char)*size);
if (new_str == NULL)
{
free(string);
free(str);
mem_error();
return NULL;
}
string->string = new_str;
string->alloclen = size;
if (str == NULL)
string->string[0] = '\0';
else
strcpy(string->string, str);
return string;
}
void string_free(string_t str)
{
free(str->string);
free(str);
}
void string_replace(string_t str, string_t replace)
{
//must realloc
if (replace->strlen > str->alloclen)
{
str->string = realloc(str->string, replace->alloclen);
if (str->string == NULL)
{
mem_error();
return;
}
strcpy(str->string, replace->string);
}
else //enough space
{
strcpy(str->string, replace->string);
}
}
void string_replace_ch(string_t str, char *replace)
{
if (strlen(replace) < str->alloclen)
{
strcpy(str->string, replace);
}
else
{
string_t new = string_create(replace);
string_replace(str, new);
string_free(new);
}
}
void string_append(string_t str, string_t append)
{
//must realloc
if (str->alloclen < (str->strlen + append->strlen))
{
int size = (append->strlen / STRING_BLOCK + 1) * STRING_BLOCK + str->alloclen;
str->string = realloc(str->string, size);
str->alloclen = size;
if (str->string == NULL)
{
mem_error();
return;
}
strcat(str->string, append->string);
}
else //enough space
{
strcat(str->string, append->string);
}
str->strlen += append->strlen;
}
void string_append_ch(string_t str, char *append)
{
if (strlen(append)+str->strlen < str->alloclen)
{
strcat(str->string, append);
str->strlen += strlen(append);
}
else
{
string_t new = string_create(append);
string_append(str, new);
string_free(new);
}
}
/*
string_t string_split(string_t str)
{
int shift;
char tmp[str->strlen];
for (shift = 0; shift < str->strlen; shift++)
{
if (str->string[shift] != ' ')
{
tmp[shift] = str->string[shift];
}
else
{
tmp[shift] = '\0';
shift++;
break;
}
}
for (int i = shift; i < str->strlen; i++)
str->string[i-shift] = str->string[i];
return string_create(tmp);
}
*/
char* string_get(string_t str)
{
return str->string;
}
bool string_is_equal(string_t str1, string_t str2)
{
return strcmp(str1->string, str2->string) == 0;
}
bool string_is_empty(string_t str)
{
return str->string[0] == '\0';
}