M2-Planet/functions/string.c

63 lines
1.5 KiB
C

/* Copyright (C) 2016 Jeremiah Orians
* This file is part of stage0.
*
* stage0 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* stage0 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with stage0. If not, see <http://www.gnu.org/licenses/>.
*/
#include<stdlib.h>
#define MAX_STRING 4096
//CONSTANT MAX_STRING 4096
// void* calloc(int count, int size);
char* copy_string(char* target, char* source)
{
while(0 != source[0])
{
target[0] = source[0];
target = target + 1;
source = source + 1;
}
return target;
}
char* postpend_char(char* s, char a)
{
char* ret = calloc(MAX_STRING, sizeof(char));
char* hold = copy_string(ret, s);
hold[0] = a;
return ret;
}
char* prepend_char(char a, char* s)
{
char* ret = calloc(MAX_STRING, sizeof(char));
ret[0] = a;
copy_string((ret+1), s);
return ret;
}
char* prepend_string(char* add, char* base)
{
char* ret = calloc(MAX_STRING, sizeof(char));
copy_string(copy_string(ret, add), base);
return ret;
}
int string_length(char* a)
{
int i = 0;
while(0 != a[i]) i = i + 1;
return i;
}