/* $NetBSD: usage.c,v 1.12 2021/11/03 16:18:09 nia Exp $ */
/*
* Copyright (c) 1999 Lennart Augustsson <
[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: usage.c,v 1.12 2021/11/03 16:18:09 nia Exp $");
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "usbhid.h"
#define _PATH_HIDTABLE "/usr/share/misc/usb_hid_usages"
struct usage_in_page {
const char *name;
int usage;
};
static struct usage_page {
const char *name;
int usage;
struct usage_in_page *page_contents;
int pagesize, pagesizemax;
} *pages;
static int npages, npagesmax;
#ifdef DEBUG
static void dump_hid_table(void);
static void
dump_hid_table(void)
{
int i, j;
for (i = 0; i < npages; i++) {
printf("%d\t%s\n", pages[i].usage, pages[i].name);
for (j = 0; j < pages[i].pagesize; j++) {
printf("\t%d\t%s\n", pages[i].page_contents[j].usage,
pages[i].page_contents[j].name);
}
}
}
#endif
void
hid_init(const char *hidname)
{
FILE *f;
char line[100], name[100], *p, *n;
int no;
int lineno;
struct usage_page *curpage = 0;
if (hidname == 0)
hidname = _PATH_HIDTABLE;
f = fopen(hidname, "r");
if (f == NULL)
err(1, "%s", hidname);
for (lineno = 1; ; lineno++) {
if (fgets(line, (int)sizeof(line), f) == NULL)
break;
if (line[0] == '#')
continue;
for (p = line; *p && isspace((unsigned char)*p); p++)
;
if (!*p)
continue;
if (sscanf(line, " * %[^\n]", name) == 1)
no = -1;
else if (sscanf(line, " 0x%x %[^\n]", &no, name) != 2 &&
sscanf(line, " %d %[^\n]", &no, name) != 2)
errx(1, "file %s, line %d, syntax error",
hidname, lineno);
for (p = name; *p; p++)
if (isspace((unsigned char)*p) || *p == '.')
*p = '_';
n = strdup(name);
if (!n)
err(1, "strdup");
if (isspace((unsigned char)line[0])) {
if (!curpage)
errx(1, "file %s, line %d, syntax error",
hidname, lineno);
if (curpage->pagesize >= curpage->pagesizemax) {
curpage->pagesizemax += 10;
if (reallocarr(&curpage->page_contents,
curpage->pagesizemax,
sizeof (struct usage_in_page)) != 0)
err(1, "realloc");
}
curpage->page_contents[curpage->pagesize].name = n;
curpage->page_contents[curpage->pagesize].usage = no;
curpage->pagesize++;
} else {
if (npages >= npagesmax) {
if (pages == NULL) {
npagesmax = 5;
} else {
npagesmax += 5;
}
if (reallocarr(&pages, npagesmax,
sizeof (struct usage_page)) != 0)
err(1, "alloc");
}
curpage = &pages[npages++];
curpage->name = n;
curpage->usage = no;
curpage->pagesize = 0;
curpage->pagesizemax = 10;
curpage->page_contents = NULL;
if (reallocarr(&curpage->page_contents,
curpage->pagesizemax,
sizeof (struct usage_in_page)) != 0)
err(1, "malloc");
}
}
fclose(f);
#ifdef DEBUG
dump_hid_table();
#endif
}
const char *
hid_usage_page(int i)
{
static char b[10];
int k;
if (!pages)
errx(1, "no hid table");
for (k = 0; k < npages; k++)
if (pages[k].usage == i)
return pages[k].name;
sprintf(b, "0x%04x", i);
return b;
}
const char *
hid_usage_in_page(unsigned int u)
{
int page = HID_PAGE(u);
int i = HID_USAGE(u);
static char b[100];
int j, k, us;
for (k = 0; k < npages; k++)
if (pages[k].usage == page)
break;
if (k >= npages)
goto bad;
for (j = 0; j < pages[k].pagesize; j++) {
us = pages[k].page_contents[j].usage;
if (us == -1) {
sprintf(b,
fmtcheck(pages[k].page_contents[j].name, "%d"),
i);
return b;
}
if (us == i)
return pages[k].page_contents[j].name;
}
bad:
sprintf(b, "0x%04x", i);
return b;
}
int
hid_parse_usage_page(const char *name)
{
int k;
if (!pages)
errx(1, "no hid table");
for (k = 0; k < npages; k++)
if (strcmp(pages[k].name, name) == 0)
return pages[k].usage;
return -1;
}
int
hid_parse_usage_in_page(const char *name)
{
const char *sep;
int k, j;
unsigned int l;
size_t len;
_DIAGASSERT(name != NULL);
sep = strchr(name, ':');
if (sep == NULL)
return -1;
len = sep - name;
for (k = 0; k < npages; k++)
if (strncmp(pages[k].name, name, len) == 0)
goto found;
if (sscanf(name, "%x:%x", &k, &j) == 2) {
return (((uint32_t)k) << 16) | j;
}
return -1;
found:
sep++;
for (j = 0; j < pages[k].pagesize; j++)
if (pages[k].page_contents[j].usage == -1) {
if (sscanf(sep, fmtcheck(
pages[k].page_contents[j].name, "%u"), &l) == 1) {
return (((uint32_t)pages[k].usage) << 16) | l;
}
} else if (strcmp(pages[k].page_contents[j].name, sep) == 0)
return (((uint32_t)pages[k].usage) << 16) | pages[k].page_contents[j].usage;
return (-1);
}
