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/*
* $Id: names.c,v 1.3 2000/08/12 12:01:19 geert Exp $
*
* Linux Zorro Utilities -- Device ID to Name Translation
*
* Copyright (C) 1998--2000 Geert Uytterhoeven
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include "zorroutils.h"
int show_numeric_ids;
char *zorro_ids = ZORRO_ID_DB;
static byte *name_list;
static int name_list_loaded;
struct nl_entry {
struct nl_entry *next;
int id1, id2;
byte *name;
};
#define ID1_VENDOR -1
#define ID1_ERROR -2
#define HASH_SIZE 1024
static struct nl_entry *nl_hash[HASH_SIZE];
static inline unsigned int nl_calc_hash(int id1, int id2)
{
unsigned int h;
h = id1 ^ id2;
h ^= (h >> 6);
return h & (HASH_SIZE-1);
}
static struct nl_entry *nl_lookup(int id1, int id2)
{
unsigned int h = nl_calc_hash(id1, id2);
struct nl_entry *n = nl_hash[h];
while (n && (n->id1 != id1 || n->id2 != id2))
n = n->next;
return n;
}
static int nl_add(int id1, int id2, byte *text)
{
unsigned int h = nl_calc_hash(id1, id2);
struct nl_entry *n = nl_hash[h];
while (n && (n->id1 != id1 || n->id2 != id2))
n = n->next;
if (n)
return 1;
n = xmalloc(sizeof(struct nl_entry));
n->id1 = id1;
n->id2 = id2;
n->name = text;
n->next = nl_hash[h];
nl_hash[h] = n;
return 0;
}
static void
err_name_list(char *msg)
{
fprintf(stderr, "%s: %s: %m\n", zorro_ids, msg);
exit(1);
}
static void
parse_name_list(void)
{
byte *p = name_list;
byte *q, *r;
int lino = 0;
int id1 = ID1_ERROR;
int id2 = 0;
int i, j;
while (*p)
{
lino++;
q = p;
while (*p && *p != '\n')
{
if (*p == '#')
{
*p++ = 0;
while (*p && *p != '\n')
p++;
break;
}
if (*p == '\t')
*p = ' ';
p++;
}
if (*p == '\n')
*p++ = 0;
if (!*q)
continue;
r = p;
while (r > q && r[-1] == ' ')
*--r = 0;
r = q;
while (*q == ' ')
q++;
if (strlen(q) < 5 || q[4] != ' ')
goto parserr;
if (r == q)
{
if (sscanf(q, "%x", &j) != 1)
goto parserr;
i = ID1_VENDOR;
id1 = i;
id2 = j;
}
else
{
if (sscanf(q, "%x", &j) != 1)
goto parserr;
if (id1 == ID1_ERROR)
goto parserr;
i = id2;
}
q += 4;
while (*q == ' ')
q++;
if (!*q)
goto parserr;
if (nl_add(i, j, q))
{
fprintf(stderr, "%s, line %d: duplicate entry\n", zorro_ids, lino);
exit(1);
}
}
return;
parserr:
fprintf(stderr, "%s, line %d: parse error\n", zorro_ids, lino);
exit(1);
}
static void
load_name_list(void)
{
int fd;
struct stat st;
fd = open(zorro_ids, O_RDONLY);
if (fd < 0)
{
show_numeric_ids = 1;
return;
}
if (fstat(fd, &st) < 0)
err_name_list("stat");
name_list = xmalloc(st.st_size + 1);
if (read(fd, name_list, st.st_size) != st.st_size)
err_name_list("read");
name_list[st.st_size] = 0;
parse_name_list();
close(fd);
name_list_loaded = 1;
}
char *
lookup_vendor(word i)
{
static char vendbuf[6];
if (!show_numeric_ids && !name_list_loaded)
load_name_list();
if (!show_numeric_ids)
{
struct nl_entry *e;
e = nl_lookup(ID1_VENDOR, i);
if (e)
return e->name;
}
sprintf(vendbuf, "%04x", i);
return vendbuf;
}
char *
lookup_device(word v, byte i, byte j)
{
static char devbuf[6];
if (!show_numeric_ids && !name_list_loaded)
load_name_list();
if (!show_numeric_ids)
{
struct nl_entry *e;
e = nl_lookup(v, (i<<8) | j);
if (e)
return e->name;
}
sprintf(devbuf, "%02x:%02x", i, j);
return devbuf;
}
char *
lookup_device_full(word v, byte i, byte j)
{
static char fullbuf[256];
if (!show_numeric_ids && !name_list_loaded)
load_name_list();
if (!show_numeric_ids)
{
struct nl_entry *e, *e2;
e = nl_lookup(ID1_VENDOR, v);
e2 = nl_lookup(v, (i<<8) | j);
if (!e)
sprintf(fullbuf, "Unknown device %04x:%02x:%02x", v, i, j);
else if (!e2)
sprintf(fullbuf, "%s: Unknown device %02x:%02x", e->name, i, j);
else
sprintf(fullbuf, "%s %s", e->name, e2->name);
}
else
sprintf(fullbuf, "%04x:%02x:%02x", v, i, j);
return fullbuf;
}
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