src/physfs_unicode.c
author Ryan C. Gordon <icculus@icculus.org>
Tue, 24 Aug 2010 14:17:07 -0400
changeset 1114 db75213cb4b5
parent 1094 aa12a958cc47
child 1129 d81afe4b0a97
permissions -rw-r--r--
Fixed some single-line comments.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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#include "physfs.h"
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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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/*
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 * From rfc3629, the UTF-8 spec:
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 *  http://www.ietf.org/rfc/rfc3629.txt
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 *
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 *   Char. number range  |        UTF-8 octet sequence
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 *      (hexadecimal)    |              (binary)
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 *   --------------------+---------------------------------------------
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 *   0000 0000-0000 007F | 0xxxxxxx
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 *   0000 0080-0000 07FF | 110xxxxx 10xxxxxx
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 *   0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
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 *   0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
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 */
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/*
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 * This may not be the best value, but it's one that isn't represented
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 *  in Unicode (0x10FFFF is the largest codepoint value). We return this
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 *  value from utf8codepoint() if there's bogus bits in the
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 *  stream. utf8codepoint() will turn this value into something
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 *  reasonable (like a question mark), for text that wants to try to recover,
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 *  whereas utf8valid() will use the value to determine if a string has bad
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 *  bits.
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 */
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#define UNICODE_BOGUS_CHAR_VALUE 0xFFFFFFFF
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/*
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 * This is the codepoint we currently return when there was bogus bits in a
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 *  UTF-8 string. May not fly in Asian locales?
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 */
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#define UNICODE_BOGUS_CHAR_CODEPOINT '?'
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static PHYSFS_uint32 utf8codepoint(const char **_str)
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{
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    const char *str = *_str;
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    PHYSFS_uint32 retval = 0;
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    PHYSFS_uint32 octet = (PHYSFS_uint32) ((PHYSFS_uint8) *str);
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    PHYSFS_uint32 octet2, octet3, octet4;
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    if (octet == 0)  /* null terminator, end of string. */
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        return 0;
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    else if (octet < 128)  /* one octet char: 0 to 127 */
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    {
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        (*_str)++;  /* skip to next possible start of codepoint. */
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        return octet;
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    } /* else if */
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    else if ((octet > 127) && (octet < 192))  /* bad (starts with 10xxxxxx). */
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    {
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        /*
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         * Apparently each of these is supposed to be flagged as a bogus
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         *  char, instead of just resyncing to the next valid codepoint.
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         */
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        (*_str)++;  /* skip to next possible start of codepoint. */
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        return UNICODE_BOGUS_CHAR_VALUE;
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    } /* else if */
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    else if (octet < 224)  /* two octets */
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    {
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        octet -= (128+64);
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        octet2 = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet2 & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        *_str += 2;  /* skip to next possible start of codepoint. */
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        retval = ((octet << 6) | (octet2 - 128));
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        if ((retval >= 0x80) && (retval <= 0x7FF))
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            return retval;
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    } /* else if */
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    else if (octet < 240)  /* three octets */
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    {
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        octet -= (128+64+32);
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        octet2 = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet2 & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        octet3 = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet3 & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        *_str += 3;  /* skip to next possible start of codepoint. */
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        retval = ( ((octet << 12)) | ((octet2-128) << 6) | ((octet3-128)) );
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        /* There are seven "UTF-16 surrogates" that are illegal in UTF-8. */
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        switch (retval)
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        {
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            case 0xD800:
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            case 0xDB7F:
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            case 0xDB80:
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            case 0xDBFF:
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            case 0xDC00:
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            case 0xDF80:
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            case 0xDFFF:
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                return UNICODE_BOGUS_CHAR_VALUE;
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        } /* switch */
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        /* 0xFFFE and 0xFFFF are illegal, too, so we check them at the edge. */
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        if ((retval >= 0x800) && (retval <= 0xFFFD))
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            return retval;
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    } /* else if */
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    else if (octet < 248)  /* four octets */
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    {
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        octet -= (128+64+32+16);
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        octet2 = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet2 & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        octet3 = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet3 & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        octet4 = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet4 & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        *_str += 4;  /* skip to next possible start of codepoint. */
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        retval = ( ((octet << 18)) | ((octet2 - 128) << 12) |
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                   ((octet3 - 128) << 6) | ((octet4 - 128)) );
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        if ((retval >= 0x10000) && (retval <= 0x10FFFF))
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            return retval;
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    } /* else if */
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    /*
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     * Five and six octet sequences became illegal in rfc3629.
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     *  We throw the codepoint away, but parse them to make sure we move
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     *  ahead the right number of bytes and don't overflow the buffer.
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     */
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    else if (octet < 252)  /* five octets */
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    {
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        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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            return UNICODE_BOGUS_CHAR_VALUE;
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diff changeset
   155
        *_str += 5;  /* skip to next possible start of codepoint. */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   156
        return UNICODE_BOGUS_CHAR_VALUE;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   157
    } /* else if */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   158
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   159
    else  /* six octets */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   160
    {
81da113b878f Initial add.
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parents:
diff changeset
   161
        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
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parents:
diff changeset
   162
        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   163
            return UNICODE_BOGUS_CHAR_VALUE;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   164
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   165
        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   166
        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   167
            return UNICODE_BOGUS_CHAR_VALUE;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   168
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   169
        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   170
        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   171
            return UNICODE_BOGUS_CHAR_VALUE;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   172
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   173
        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   174
        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   175
            return UNICODE_BOGUS_CHAR_VALUE;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   176
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   177
        octet = (PHYSFS_uint32) ((PHYSFS_uint8) *(++str));
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   178
        if ((octet & (128+64)) != 128)  /* Format isn't 10xxxxxx? */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   179
            return UNICODE_BOGUS_CHAR_VALUE;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   180
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   181
        *_str += 6;  /* skip to next possible start of codepoint. */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   182
        return UNICODE_BOGUS_CHAR_VALUE;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   183
    } /* else if */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   184
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   185
    return UNICODE_BOGUS_CHAR_VALUE;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   186
} /* utf8codepoint */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   187
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   188
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   189
void PHYSFS_utf8ToUcs4(const char *src, PHYSFS_uint32 *dst, PHYSFS_uint64 len)
787
81da113b878f Initial add.
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parents:
diff changeset
   190
{
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   191
    len -= sizeof (PHYSFS_uint32);   /* save room for null char. */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   192
    while (len >= sizeof (PHYSFS_uint32))
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   193
    {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   194
        PHYSFS_uint32 cp = utf8codepoint(&src);
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   195
        if (cp == 0)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   196
            break;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   197
        else if (cp == UNICODE_BOGUS_CHAR_VALUE)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   198
            cp = UNICODE_BOGUS_CHAR_CODEPOINT;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   199
        *(dst++) = cp;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   200
        len -= sizeof (PHYSFS_uint32);
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   201
    } /* while */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   202
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   203
    *dst = 0;
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   204
} /* PHYSFS_utf8ToUcs4 */
787
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   205
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   206
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   207
void PHYSFS_utf8ToUcs2(const char *src, PHYSFS_uint16 *dst, PHYSFS_uint64 len)
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   208
{
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   209
    len -= sizeof (PHYSFS_uint16);   /* save room for null char. */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   210
    while (len >= sizeof (PHYSFS_uint16))
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   211
    {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   212
        PHYSFS_uint32 cp = utf8codepoint(&src);
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   213
        if (cp == 0)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   214
            break;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   215
        else if (cp == UNICODE_BOGUS_CHAR_VALUE)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   216
            cp = UNICODE_BOGUS_CHAR_CODEPOINT;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   217
1094
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   218
        if (cp > 0xFFFF)  /* UTF-16 surrogates (bogus chars in UCS-2) */
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   219
            cp = UNICODE_BOGUS_CHAR_CODEPOINT;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   220
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   221
        *(dst++) = cp;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   222
        len -= sizeof (PHYSFS_uint16);
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   223
    } /* while */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   224
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   225
    *dst = 0;
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   226
} /* PHYSFS_utf8ToUcs2 */
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   227
1094
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   228
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   229
void PHYSFS_utf8ToUtf16(const char *src, PHYSFS_uint16 *dst, PHYSFS_uint64 len)
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   230
{
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   231
    len -= sizeof (PHYSFS_uint16);   /* save room for null char. */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   232
    while (len >= sizeof (PHYSFS_uint16))
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   233
    {
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   234
        PHYSFS_uint32 cp = utf8codepoint(&src);
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   235
        if (cp == 0)
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   236
            break;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   237
        else if (cp == UNICODE_BOGUS_CHAR_VALUE)
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   238
            cp = UNICODE_BOGUS_CHAR_CODEPOINT;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   239
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   240
        if (cp > 0xFFFF)  /* encode as surrogate pair */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   241
        {
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   242
            if (len < (sizeof (PHYSFS_uint16) * 2))
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   243
                break;  /* not enough room for the pair, stop now. */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   244
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   245
            cp -= 0x10000;  /* Make this a 20-bit value */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   246
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   247
            *(dst++) = 0xD800 + ((cp >> 10) & 0x3FF);
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   248
            len -= sizeof (PHYSFS_uint16);
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   249
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   250
            cp = 0xDC00 + (cp & 0x3FF);
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   251
        } /* if */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   252
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   253
        *(dst++) = cp;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   254
        len -= sizeof (PHYSFS_uint16);
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   255
    } /* while */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   256
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   257
    *dst = 0;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   258
} /* PHYSFS_utf8ToUtf16 */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   259
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   260
static void utf8fromcodepoint(PHYSFS_uint32 cp, char **_dst, PHYSFS_uint64 *_len)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   261
{
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   262
    char *dst = *_dst;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   263
    PHYSFS_uint64 len = *_len;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   264
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   265
    if (len == 0)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   266
        return;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   267
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   268
    if (cp > 0x10FFFF)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   269
        cp = UNICODE_BOGUS_CHAR_CODEPOINT;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   270
    else if ((cp == 0xFFFE) || (cp == 0xFFFF))  /* illegal values. */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   271
        cp = UNICODE_BOGUS_CHAR_CODEPOINT;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   272
    else
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   273
    {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   274
        /* There are seven "UTF-16 surrogates" that are illegal in UTF-8. */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   275
        switch (cp)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   276
        {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   277
            case 0xD800:
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   278
            case 0xDB7F:
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   279
            case 0xDB80:
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   280
            case 0xDBFF:
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   281
            case 0xDC00:
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   282
            case 0xDF80:
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   283
            case 0xDFFF:
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   284
                cp = UNICODE_BOGUS_CHAR_CODEPOINT;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   285
        } /* switch */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   286
    } /* else */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   287
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   288
    /* Do the encoding... */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   289
    if (cp < 0x80)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   290
    {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   291
        *(dst++) = (char) cp;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   292
        len--;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   293
    } /* if */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   294
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   295
    else if (cp < 0x800)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   296
    {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   297
        if (len < 2)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   298
            len = 0;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   299
        else
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   300
        {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   301
            *(dst++) = (char) ((cp >> 6) | 128 | 64);
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   302
            *(dst++) = (char) (cp & 0x3F) | 128;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   303
            len -= 2;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   304
        } /* else */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   305
    } /* else if */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   306
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   307
    else if (cp < 0x10000)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   308
    {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   309
        if (len < 3)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   310
            len = 0;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   311
        else
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   312
        {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   313
            *(dst++) = (char) ((cp >> 12) | 128 | 64 | 32);
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   314
            *(dst++) = (char) ((cp >> 6) & 0x3F) | 128;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   315
            *(dst++) = (char) (cp & 0x3F) | 128;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   316
            len -= 3;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   317
        } /* else */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   318
    } /* else if */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   319
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   320
    else
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   321
    {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   322
        if (len < 4)
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   323
            len = 0;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   324
        else
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   325
        {
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   326
            *(dst++) = (char) ((cp >> 18) | 128 | 64 | 32 | 16);
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   327
            *(dst++) = (char) ((cp >> 12) & 0x3F) | 128;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   328
            *(dst++) = (char) ((cp >> 6) & 0x3F) | 128;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   329
            *(dst++) = (char) (cp & 0x3F) | 128;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   330
            len -= 4;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   331
        } /* else if */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   332
    } /* else */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   333
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   334
    *_dst = dst;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   335
    *_len = len;
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   336
} /* utf8fromcodepoint */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   337
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   338
#define UTF8FROMTYPE(typ, src, dst, len) \
1092
12c87d886a75 Zero-sized destination buffers when converting to UTF-8 shouldn't overflow.
Ryan C. Gordon <icculus@icculus.org>
parents: 1016
diff changeset
   339
    if (len == 0) return; \
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   340
    len--;  \
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   341
    while (len) \
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   342
    { \
998
974b90b56c43 Fixed latin1 to UTF-8 conversion (sign conversion was broken).
Ryan C. Gordon <icculus@icculus.org>
parents: 986
diff changeset
   343
        const PHYSFS_uint32 cp = (PHYSFS_uint32) ((typ) (*(src++))); \
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   344
        if (cp == 0) break; \
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   345
        utf8fromcodepoint(cp, &dst, &len); \
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   346
    } \
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   347
    *dst = '\0'; \
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   348
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   349
void PHYSFS_utf8FromUcs4(const PHYSFS_uint32 *src, char *dst, PHYSFS_uint64 len)
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   350
{
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   351
    UTF8FROMTYPE(PHYSFS_uint32, src, dst, len);
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   352
} /* PHYSFS_utf8FromUcs4 */
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   353
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   354
void PHYSFS_utf8FromUcs2(const PHYSFS_uint16 *src, char *dst, PHYSFS_uint64 len)
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   355
{
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   356
    UTF8FROMTYPE(PHYSFS_uint64, src, dst, len);
1093
738b2ee912b9 Fixed incorrect comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 1092
diff changeset
   357
} /* PHYSFS_utf8FromUcs2 */
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   358
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   359
/* latin1 maps to unicode codepoints directly, we just utf-8 encode it. */
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   360
void PHYSFS_utf8FromLatin1(const char *src, char *dst, PHYSFS_uint64 len)
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   361
{
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   362
    UTF8FROMTYPE(PHYSFS_uint8, src, dst, len);
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   363
} /* PHYSFS_utf8FromLatin1 */
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   364
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   365
#undef UTF8FROMTYPE
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   366
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   367
1094
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   368
void PHYSFS_utf8FromUtf16(const PHYSFS_uint16 *src, char *dst, PHYSFS_uint64 len)
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   369
{
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   370
    if (len == 0)
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   371
        return;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   372
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   373
    len--;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   374
    while (len)
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   375
    {
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   376
        PHYSFS_uint32 cp = (PHYSFS_uint32) *(src++);
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   377
        if (cp == 0)
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   378
            break;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   379
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   380
        /* Orphaned second half of surrogate pair? */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   381
        if ((cp >= 0xDC00) && (cp <= 0xDFFF))
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   382
            cp = UNICODE_BOGUS_CHAR_CODEPOINT;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   383
        else if ((cp >= 0xD800) && (cp <= 0xDBFF))  /* start surrogate pair! */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   384
        {
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   385
            const PHYSFS_uint32 pair = (PHYSFS_uint32) *src;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   386
            if ((pair < 0xDC00) || (pair > 0xDFFF))
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   387
                cp = UNICODE_BOGUS_CHAR_CODEPOINT;
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   388
            else
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   389
            {
1114
db75213cb4b5 Fixed some single-line comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 1094
diff changeset
   390
                src++;  /* eat the other surrogate. */
1094
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   391
                cp = (((cp - 0xD800) << 10) | (pair - 0xDC00));
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   392
            } /* else */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   393
        } /* else if */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   394
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   395
        utf8fromcodepoint(cp, &dst, &len);
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   396
    } /* while */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   397
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   398
    *dst = '\0';
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   399
} /* PHYSFS_utf8FromUtf16 */
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   400
aa12a958cc47 Added UTF-16 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 1093
diff changeset
   401
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   402
typedef struct CaseFoldMapping
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   403
{
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   404
    PHYSFS_uint32 from;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   405
    PHYSFS_uint32 to0;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   406
    PHYSFS_uint32 to1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   407
    PHYSFS_uint32 to2;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   408
} CaseFoldMapping;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   409
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   410
typedef struct CaseFoldHashBucket
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   411
{
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   412
    const PHYSFS_uint8 count;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   413
    const CaseFoldMapping *list;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   414
} CaseFoldHashBucket;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   415
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   416
#include "physfs_casefolding.h"
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   417
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   418
static void locate_case_fold_mapping(const PHYSFS_uint32 from,
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   419
                                     PHYSFS_uint32 *to)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   420
{
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   421
    PHYSFS_uint32 i;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   422
    const PHYSFS_uint8 hashed = ((from ^ (from >> 8)) & 0xFF);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   423
    const CaseFoldHashBucket *bucket = &case_fold_hash[hashed];
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   424
    const CaseFoldMapping *mapping = bucket->list;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   425
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   426
    for (i = 0; i < bucket->count; i++, mapping++)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   427
    {
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   428
        if (mapping->from == from)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   429
        {
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   430
            to[0] = mapping->to0;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   431
            to[1] = mapping->to1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   432
            to[2] = mapping->to2;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   433
            return;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   434
        } /* if */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   435
    } /* for */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   436
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   437
    /* Not found...there's no remapping for this codepoint. */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   438
    to[0] = from;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   439
    to[1] = 0;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   440
    to[2] = 0;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   441
} /* locate_case_fold_mapping */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   442
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   443
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   444
static int utf8codepointcmp(const PHYSFS_uint32 cp1, const PHYSFS_uint32 cp2)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   445
{
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   446
    PHYSFS_uint32 folded1[3], folded2[3];
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   447
    locate_case_fold_mapping(cp1, folded1);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   448
    locate_case_fold_mapping(cp2, folded2);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   449
    return ( (folded1[0] == folded2[0]) &&
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   450
             (folded1[1] == folded2[1]) &&
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   451
             (folded1[2] == folded2[2]) );
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   452
} /* utf8codepointcmp */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   453
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   454
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   455
int __PHYSFS_utf8strcasecmp(const char *str1, const char *str2)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   456
{
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   457
    while (1)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   458
    {
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   459
        const PHYSFS_uint32 cp1 = utf8codepoint(&str1);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   460
        const PHYSFS_uint32 cp2 = utf8codepoint(&str2);
986
e69d37f80ce2 Fixed some Sun Studio warnings about unreachable code.
Ryan C. Gordon <icculus@icculus.org>
parents: 972
diff changeset
   461
        if (!utf8codepointcmp(cp1, cp2)) break;
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   462
        if (cp1 == 0) return 1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   463
    } /* while */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   464
986
e69d37f80ce2 Fixed some Sun Studio warnings about unreachable code.
Ryan C. Gordon <icculus@icculus.org>
parents: 972
diff changeset
   465
    return 0;
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   466
} /* __PHYSFS_utf8strcasecmp */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   467
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   468
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   469
int __PHYSFS_utf8strnicmp(const char *str1, const char *str2, PHYSFS_uint32 n)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   470
{
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   471
    while (n > 0)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   472
    {
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   473
        const PHYSFS_uint32 cp1 = utf8codepoint(&str1);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   474
        const PHYSFS_uint32 cp2 = utf8codepoint(&str2);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   475
        if (!utf8codepointcmp(cp1, cp2)) return 0;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   476
        if (cp1 == 0) return 1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   477
        n--;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   478
    } /* while */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   479
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   480
    return 1;  /* matched to n chars. */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   481
} /* __PHYSFS_utf8strnicmp */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   482
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   483
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   484
int __PHYSFS_stricmpASCII(const char *str1, const char *str2)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   485
{
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   486
    while (1)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   487
    {
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   488
        const char ch1 = *(str1++);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   489
        const char ch2 = *(str2++);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   490
        const char cp1 = ((ch1 >= 'A') && (ch1 <= 'Z')) ? (ch1+32) : ch1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   491
        const char cp2 = ((ch2 >= 'A') && (ch2 <= 'Z')) ? (ch2+32) : ch2;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   492
        if (cp1 < cp2)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   493
            return -1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   494
        else if (cp1 > cp2)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   495
            return 1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   496
        else if (cp1 == 0)  /* they're both null chars? */
986
e69d37f80ce2 Fixed some Sun Studio warnings about unreachable code.
Ryan C. Gordon <icculus@icculus.org>
parents: 972
diff changeset
   497
            break;
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   498
    } /* while */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   499
986
e69d37f80ce2 Fixed some Sun Studio warnings about unreachable code.
Ryan C. Gordon <icculus@icculus.org>
parents: 972
diff changeset
   500
    return 0;
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   501
} /* __PHYSFS_stricmpASCII */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   502
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   503
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   504
int __PHYSFS_strnicmpASCII(const char *str1, const char *str2, PHYSFS_uint32 n)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   505
{
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   506
    while (n-- > 0)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   507
    {
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   508
        const char ch1 = *(str1++);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   509
        const char ch2 = *(str2++);
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   510
        const char cp1 = ((ch1 >= 'A') && (ch1 <= 'Z')) ? (ch1+32) : ch1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   511
        const char cp2 = ((ch2 >= 'A') && (ch2 <= 'Z')) ? (ch2+32) : ch2;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   512
        if (cp1 < cp2)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   513
            return -1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   514
        else if (cp1 > cp2)
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   515
            return 1;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   516
        else if (cp1 == 0)  /* they're both null chars? */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   517
            return 0;
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   518
    } /* while */
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   519
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   520
    return 0;
1093
738b2ee912b9 Fixed incorrect comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 1092
diff changeset
   521
} /* __PHYSFS_strnicmpASCII */
828
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   522
ee871d51510d Bunch of work on Unicode...added case-folding stricmp, removed
Ryan C. Gordon <icculus@icculus.org>
parents: 808
diff changeset
   523
787
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   524
/* end of physfs_unicode.c ... */
81da113b878f Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   525