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/*
* feature.c --- convert between features and strings
*
* Copyright (C) 1999 Theodore Ts'o <tytso@mit.edu>
*
* This file can be redistributed under the terms of the GNU Library General
* Public License
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include "e2p.h"
struct hash {
int num;
const char *string;
};
static struct hash hash_list[] = {
{ EXT2_HASH_LEGACY, "legacy" },
{ EXT2_HASH_HALF_MD4, "half_md4" },
{ EXT2_HASH_TEA, "tea" },
{ 0, 0 },
};
const char *e2p_hash2string(int num)
{
struct hash *p;
static char buf[20];
for (p = hash_list; p->string; p++) {
if (num == p->num)
return p->string;
}
sprintf(buf, "HASHALG_%d", num);
return buf;
}
/*
* Returns the hash algorithm, or -1 on error
*/
int e2p_string2hash(char *string)
{
struct hash *p;
char *eptr;
int num;
for (p = hash_list; p->string; p++) {
if (!strcasecmp(string, p->string)) {
return p->num;
}
}
if (strncasecmp(string, "HASHALG_", 8))
return -1;
if (string[8] == 0)
return -1;
num = strtol(string+8, &eptr, 10);
if (num > 255 || num < 0)
return -1;
if (*eptr)
return -1;
return num;
}
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