firmware/scripts/.svn/text-base/usbstring.c.svn-base

   1 /* AT91SAM7 USB string descriptor builder
   2  * (C) 2006 by Harald Welte <laforge@gnumonks.org>
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 /* Based on existing utf8_to_utf16le() function,
  20  * Copyright (C) 2003 David Brownell
  21  *
  22  * This program is free software; you can redistribute it and/or modify
  23  * it under the terms of the GNU Lesser General Public License as published
  24  * by the Free Software Foundation; either version 2.1 of the License, or
  25  * (at your option) any later version.
  26  */
  27
  28 #include <sys/types.h>
  29 #include <unistd.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33
  34 static int utf8_to_utf16le(const char *s, u_int16_t *cp, unsigned len)
  35 {
  36         int     count = 0;
  37         u_int8_t        c;
  38         u_int16_t       uchar;
  39
  40         /* this insists on correct encodings, though not minimal ones.
  41          * BUT it currently rejects legit 4-byte UTF-8 code points,
  42          * which need surrogate pairs.  (Unicode 3.1 can use them.)
  43          */
  44         while (len != 0 && (c = (u_int8_t) *s++) != 0) {
  45                 if (c & 0x80) {
  46                         // 2-byte sequence:
  47                         // 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
  48                         if ((c & 0xe0) == 0xc0) {
  49                                 uchar = (c & 0x1f) << 6;
  50
  51                                 c = (u_int8_t) *s++;
  52                                 if ((c & 0xc0) != 0xc0)
  53                                         goto fail;
  54                                 c &= 0x3f;
  55                                 uchar |= c;
  56
  57                         // 3-byte sequence (most CJKV characters):
  58                         // zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
  59                         } else if ((c & 0xf0) == 0xe0) {
  60                                 uchar = (c & 0x0f) << 12;
  61
  62                                 c = (u_int8_t) *s++;
  63                                 if ((c & 0xc0) != 0xc0)
  64                                         goto fail;
  65                                 c &= 0x3f;
  66                                 uchar |= c << 6;
  67
  68                                 c = (u_int8_t) *s++;
  69                                 if ((c & 0xc0) != 0xc0)
  70                                         goto fail;
  71                                 c &= 0x3f;
  72                                 uchar |= c;
  73
  74                                 /* no bogus surrogates */
  75                                 if (0xd800 <= uchar && uchar <= 0xdfff)
  76                                         goto fail;
  77
  78                         // 4-byte sequence (surrogate pairs, currently rare):
  79                         // 11101110wwwwzzzzyy + 110111yyyyxxxxxx
  80                         //     = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
  81                         // (uuuuu = wwww + 1)
  82                         // FIXME accept the surrogate code points (only)
  83
  84                         } else
  85                                 goto fail;
  86                 } else
  87                         uchar = c;
  88
  89                 *cp++ = uchar;
  90                 count++;
  91                 len--;
  92         }
  93         return count;
  94 fail:
  95         return -1;
  96 }
  97
  98 #define COLUMNS         6
  99 static int print_array16(u_int16_t *buf, int len)
 100 {
 101         int i;
 102         for (i = 0; i < len; i++) {
 103                 int mod = i % COLUMNS;
 104                 char *suffix;
 105                 char *prefix;
 106
 107                 switch (mod) {
 108                 case 0:
 109                         if (i == 0)
 110                                 prefix = "\t";
 111                         else
 112                                 prefix= "\t\t\t";
 113                         suffix = ", ";
 114                         break;
 115                 case COLUMNS-1:
 116                         prefix = "";
 117                         suffix = ",\n";
 118                         break;
 119                 default:
 120                         prefix = "";
 121                         suffix = ", ";
 122                         break;
 123                 }
 124
 125                 printf("%s0x%04x%s", prefix, buf[i], suffix);
 126         }
 127 }
 128
 129 static void print_structhdr(int i, int size)
 130 {
 131         printf( "static const struct {\n"
 132                 "\tstruct usb_descriptor_header hdr;\n"
 133                 "\tu_int16_t wData[];\n"
 134                 "} __attribute__((packed)) string%d = {\n"
 135                 "\t.hdr = {\n"
 136                 "\t\t.bLength = sizeof(struct usb_descriptor_header) + %u * sizeof(u_int16_t),\n"
 137                 "\t\t.bDescriptorType = USB_DT_STRING,\n"
 138                 "\t},\n"
 139                 "\t.wData = {", i, size);
 140 }
 141 static void print_structftr(void)
 142 {
 143         printf("},\n};\n\n");
 144 }
 145
 146 int main(int argc, char **argv)
 147 {
 148         char asciibuf[512+1];
 149         u_int16_t utf16buf[1024+1];
 150         int len;
 151         int j, i = 1;
 152
 153         printf("#ifndef _USB_STRINGS_H\n#define _USB_STRINGS_H\n\n");
 154         printf("/* THIS FILE IS AUTOGENERATED, DO NOT MODIFY MANUALLY */\n\n");
 155         printf("#include <usb_ch9.h>\n");
 156         printf("#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))\n\n");
 157
 158         print_structhdr(0, 1);
 159         printf("0x0409 /* English */ ");
 160         print_structftr();
 161 #if 0
 162         printf("static const struct usb_string_descriptor string0 = {\n"
 163                "\t.bLength = sizeof(string0) + 1 * sizeof(u_int16_t),\n"
 164                "\t.bDescriptorType = USB_DT_STRING,\n"
 165                "\t.wData[0] = 0x0409, /* English */\n"
 166                "};\n\n");
 167 #endif
 168
 169         while (scanf("%512[^\n]\n", asciibuf) != EOF) {
 170                 len = strlen(asciibuf);
 171                 printf("/* String %u \"%s\" */\n", i, asciibuf);
 172
 173                 /* FIXME: check return value */
 174                 utf8_to_utf16le(asciibuf, utf16buf, len);
 175
 176                 print_structhdr(i, len);
 177 #if 0
 178                 printf("static const struct usb_string_descriptor string%d = {\n"
 179                        "\t.bLength = sizeof(string%d) + %d * sizeof(u_int16_t),\n"
 180                        "\t.bDescriptorType = USB_DT_STRING,\n"
 181                        "\t.wData = {", i, i, len);
 182 #endif
 183
 184                 print_array16(utf16buf, len);
 185
 186                 print_structftr();
 187 #if 0
 188                 printf("},\n};\n\n");
 189 #endif
 190
 191                 i++;
 192         }
 193
 194         printf("static const struct usb_descriptor_header *usb_strings[] = {\n");
 195         for (j = 0; j < i; j++)
 196                 printf("\t(struct usb_descriptor_header *) &string%d,\n", j);
 197         printf("};\n\n");
 198         printf("#endif /* _USB_STRINGS_H */\n");
 199
 200         exit(0);
 201 }