/* See LICENSE file for copyright and license details. */

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

#include "util.h"

void
die(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	vfprintf(stderr, fmt, ap);
	va_end(ap);
	if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
		fputc(' ', stderr);
		perror(NULL);
	} else {
		fputc('\n', stderr);
	}
	exit(1);
}

void
warn(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	fprintf(stderr, "warning: ");
	vfprintf(stderr, fmt, ap);
	va_end(ap);
	fputc('\n', stderr);
}

void *
xmalloc(size_t size)
{
	void *p = malloc(size);

	if (!p)
		die("malloc:");
	return p;
}

void *
xrealloc(void *ptr, size_t size)
{
	void *p = realloc(ptr, size);

	if (!p)
		die("realloc:");
	return p;
}

char *
xstrdup(const char *s)
{
	char *p = strdup(s);

	if (!p)
		die("strdup:");
	return p;
}

char *
str_trim(char *str)
{
	char *end;

	while (isspace((unsigned char)*str))
		str++;
	if (*str == '\0')
		return str;
	end = str + strlen(str) - 1;
	while (end > str && isspace((unsigned char)*end))
		end--;
	end[1] = '\0';
	return str;
}

int
str_starts_with(const char *str, const char *prefix)
{
	return strncmp(str, prefix, strlen(prefix)) == 0;
}

int
str_ends_with(const char *str, const char *suffix)
{
	size_t slen = strlen(str);
	size_t suflen = strlen(suffix);

	if (suflen > slen)
		return 0;
	return strcmp(str + slen - suflen, suffix) == 0;
}