#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "parse.h"
void *xmalloc(size_t size)
{
	void *p;
	p = malloc(size);
	if (!p) {
		fprintf(stderr, "malloc: %s", strerror(errno));
		exit(errno);
	}
	return p;
}

void *xcalloc(size_t nmemb, size_t size)
{
	void *p;
	p = xmalloc(nmemb * size);
	memset(p, '\0', nmemb * size);
	return p;
}
char *resize(char *ptr, size_t size)
{
/*	char *ret;
	if (!ptr)
		ret = (char *) xcalloc(size, 1);
	else {
		ret = (char *) xcalloc(size, 1);
		memcpy(ret, ptr, size);
		free(ptr);
	}
	return ret;*/
	return (char *) realloc(ptr, size);
}

char *fget(char *s, int size, FILE * stream)
{
	int i;
	char c;
	for (i = 0; i < size; i++) {
		s[i] = fgetc(stream);
		if (s[i] == '\n' || s[i] == '\r') {
			s[i] = '\n';
			s[i + 1] = '\0';
			do {
				c = fgetc(stream);
			} while (c == '\n' || c == '\r');
			fseek(stream, -1, SEEK_CUR);
			break;
		}
	}
	return s;
}

char *strnstr(const char *haystack, char *needle, size_t size)
{
	char *max;
	size_t len = strlen(needle);
	if (!haystack || !needle || !size)
		return NULL;
	for (max = (char *) (haystack + size - len); haystack < max;
	     haystack++)
		if (*haystack == *needle)
			if (!strncmp(haystack, needle, len))
				return (char *) haystack;
	return NULL;
}