lib/libusbhid/usage.c

   1 /* $NetBSD: usage.c,v 1.8 2000/10/10 19:23:58 is Exp $ */
   2
   3 /*
   4  * Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/lib/libusbhid/usage.c,v 1.8 2003/04/09 01:52:48 mdodd Exp $
  29  */
  30
  31 #include <assert.h>
  32 #include <ctype.h>
  33 #include <err.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #include "usbhid.h"
  39
  40 #define _PATH_HIDTABLE "/usr/share/misc/usb_hid_usages"
  41
  42 struct usage_in_page {
  43         const char *name;
  44         int usage;
  45 };
  46
  47 static struct usage_page {
  48         const char *name;
  49         int usage;
  50         struct usage_in_page *page_contents;
  51         int pagesize, pagesizemax;
  52 } *pages;
  53 static int npages, npagesmax;
  54
  55 #ifdef DEBUG
  56 void
  57 dump_hid_table(void)
  58 {
  59         int i, j;
  60
  61         for (i = 0; i < npages; i++) {
  62                 printf("%d\t%s\n", pages[i].usage, pages[i].name);
  63                 for (j = 0; j < pages[i].pagesize; j++) {
  64                         printf("\t%d\t%s\n", pages[i].page_contents[j].usage,
  65                                pages[i].page_contents[j].name);
  66                 }
  67         }
  68 }
  69 #endif
  70
  71 void
  72 hid_init(const char *hidname)
  73 {
  74         FILE *f;
  75         char line[100], name[100], *p, *n;
  76         int no;
  77         int lineno;
  78         struct usage_page *curpage = NULL;
  79
  80         if (hidname == NULL)
  81                 hidname = _PATH_HIDTABLE;
  82
  83         f = fopen(hidname, "r");
  84         if (f == NULL)
  85                 err(1, "%s", hidname);
  86         for (lineno = 1; ; lineno++) {
  87                 if (fgets(line, sizeof line, f) == NULL)
  88                         break;
  89                 if (line[0] == '#')
  90                         continue;
  91                 for (p = line; *p && isspace(*p); p++)
  92                         ;
  93                 if (!*p)
  94                         continue;
  95                 if (sscanf(line, " * %[^\n]", name) == 1)
  96                         no = -1;
  97                 else if (sscanf(line, " 0x%x %[^\n]", &no, name) != 2 &&
  98                          sscanf(line, " %d %[^\n]", &no, name) != 2)
  99                         errx(1, "file %s, line %d, syntax error",
 100                              hidname, lineno);
 101                 for (p = name; *p; p++)
 102                         if (isspace(*p) || *p == '.')
 103                                 *p = '_';
 104                 n = strdup(name);
 105                 if (!n)
 106                         err(1, "strdup");
 107                 if (isspace(line[0])) {
 108                         if (!curpage)
 109                                 errx(1, "file %s, line %d, syntax error",
 110                                      hidname, lineno);
 111                         if (curpage->pagesize >= curpage->pagesizemax) {
 112                                 curpage->pagesizemax += 10;
 113                                 curpage->page_contents =
 114                                         realloc(curpage->page_contents,
 115                                                 curpage->pagesizemax *
 116                                                 sizeof (struct usage_in_page));
 117                                 if (!curpage->page_contents)
 118                                         err(1, "realloc");
 119                         }
 120                         curpage->page_contents[curpage->pagesize].name = n;
 121                         curpage->page_contents[curpage->pagesize].usage = no;
 122                         curpage->pagesize++;
 123                 } else {
 124                         if (npages >= npagesmax) {
 125                                 if (pages == NULL) {
 126                                         npagesmax = 5;
 127                                         pages = malloc(npagesmax *
 128                                                   sizeof (struct usage_page));
 129                                 } else {
 130                                         npagesmax += 5;
 131                                         pages = realloc(pages,
 132                                                    npagesmax *
 133                                                    sizeof (struct usage_page));
 134                                 }
 135                                 if (!pages)
 136                                         err(1, "alloc");
 137                         }
 138                         curpage = &pages[npages++];
 139                         curpage->name = n;
 140                         curpage->usage = no;
 141                         curpage->pagesize = 0;
 142                         curpage->pagesizemax = 10;
 143                         curpage->page_contents =
 144                                 malloc(curpage->pagesizemax *
 145                                        sizeof (struct usage_in_page));
 146                         if (!curpage->page_contents)
 147                                 err(1, "malloc");
 148                 }
 149         }
 150         fclose(f);
 151 #ifdef DEBUG
 152         dump_hid_table();
 153 #endif
 154 }
 155
 156 const char *
 157 hid_usage_page(int i)
 158 {
 159         static char b[10];
 160         int k;
 161
 162         if (!pages)
 163                 errx(1, "no hid table");
 164
 165         for (k = 0; k < npages; k++)
 166                 if (pages[k].usage == i)
 167                         return pages[k].name;
 168         sprintf(b, "0x%04x", i);
 169         return b;
 170 }
 171
 172 const char *
 173 hid_usage_in_page(unsigned int u)
 174 {
 175         int page = HID_PAGE(u);
 176         int i = HID_USAGE(u);
 177         static char b[100];
 178         int j, k, us;
 179
 180         for (k = 0; k < npages; k++)
 181                 if (pages[k].usage == page)
 182                         break;
 183         if (k >= npages)
 184                 goto bad;
 185         for (j = 0; j < pages[k].pagesize; j++) {
 186                 us = pages[k].page_contents[j].usage;
 187                 if (us == -1) {
 188                         sprintf(b,
 189                             fmtcheck(pages[k].page_contents[j].name, "%d"),
 190                             i);
 191                         return b;
 192                 }
 193                 if (us == i)
 194                         return pages[k].page_contents[j].name;
 195         }
 196  bad:
 197         sprintf(b, "0x%04x", i);
 198         return b;
 199 }
 200
 201 int
 202 hid_parse_usage_page(const char *name)
 203 {
 204         int k;
 205
 206         if (!pages)
 207                 errx(1, "no hid table");
 208
 209         for (k = 0; k < npages; k++)
 210                 if (strcmp(pages[k].name, name) == 0)
 211                         return pages[k].usage;
 212         return -1;
 213 }
 214
 215 /* XXX handle hex */
 216 int
 217 hid_parse_usage_in_page(const char *name)
 218 {
 219         const char *sep;
 220         int k, j;
 221         unsigned int l;
 222
 223         sep = strchr(name, ':');
 224         if (sep == NULL)
 225                 return -1;
 226         l = sep - name;
 227         for (k = 0; k < npages; k++)
 228                 if (strncmp(pages[k].name, name, l) == 0)
 229                         goto found;
 230         return -1;
 231  found:
 232         sep++;
 233         for (j = 0; j < pages[k].pagesize; j++)
 234                 if (strcmp(pages[k].page_contents[j].name, sep) == 0)
 235                         return (pages[k].usage << 16) | pages[k].page_contents[j].usage;
 236         return (-1);
 237 }