IABSD.fr/xenocara/lib/libX11/src/StrKeysym.c

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• Author : matthieu
  Date : 2010-10-05 19:50:57
  Hash : 502b62f9
  Message : Update to libX11 1.3.6. Tested by ajacoutot@, jasper@ and krw@.

• lib/libX11/src/StrKeysym.c

• /*
  
  Copyright 1985, 1987, 1990, 1998  The Open Group
  
  Permission to use, copy, modify, distribute, and sell this software and its
  documentation for any purpose is hereby granted without fee, provided that
  the above copyright notice appear in all copies and that both that
  copyright notice and this permission notice appear in supporting
  documentation.
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  Except as contained in this notice, the name of The Open Group shall not be
  used in advertising or otherwise to promote the sale, use or other dealings
  in this Software without prior written authorization from The Open Group.
  
  */
  
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  #include <limits.h>
  #include "Xlibint.h"
  #include <X11/Xresource.h>
  #include <X11/keysymdef.h>
  #include "Xresinternal.h"
  
  #define NEEDKTABLE
  #include "ks_tables.h"
  #include "Key.h"
  
  #ifndef KEYSYMDB
  #ifndef XKEYSYMDB
  #define KEYSYMDB "/usr/lib/X11/XKeysymDB"
  #else
  #define KEYSYMDB XKEYSYMDB
  #endif
  #endif
  
  static Bool initialized;
  static XrmDatabase keysymdb;
  static XrmQuark Qkeysym[2];
  
  XrmDatabase
  _XInitKeysymDB(void)
  {
      if (!initialized)
      {
  	const char *dbname;
  
  	XrmInitialize();
  	/* use and name of this env var is not part of the standard */
  	/* implementation-dependent feature */
  	dbname = getenv("XKEYSYMDB");
  	if (!dbname)
  	    dbname = KEYSYMDB;
  	keysymdb = XrmGetFileDatabase(dbname);
  	if (keysymdb)
  	    Qkeysym[0] = XrmStringToQuark("Keysym");
  	initialized = True;
      }
      return keysymdb;
  }
  
  KeySym
  XStringToKeysym(_Xconst char *s)
  {
      register int i, n;
      int h;
      register Signature sig = 0;
      register const char *p = s;
      register int c;
      register int idx;
      const unsigned char *entry;
      unsigned char sig1, sig2;
      KeySym val;
  
      while ((c = *p++))
  	sig = (sig << 1) + c;
      i = sig % KTABLESIZE;
      h = i + 1;
      sig1 = (sig >> 8) & 0xff;
      sig2 = sig & 0xff;
      n = KMAXHASH;
      while ((idx = hashString[i]))
      {
  	entry = &_XkeyTable[idx];
  	if ((entry[0] == sig1) && (entry[1] == sig2) &&
  	    !strcmp(s, (char *)entry + 6))
  	{
  	    val = (entry[2] << 24) | (entry[3] << 16) |
  	          (entry[4] << 8)  | entry[5];
  	    if (!val)
  		val = XK_VoidSymbol;
  	    return val;
  	}
  	if (!--n)
  	    break;
  	i += h;
  	if (i >= KTABLESIZE)
  	    i -= KTABLESIZE;
      }
  
      if (!initialized)
  	(void)_XInitKeysymDB();
      if (keysymdb)
      {
  	XrmValue result;
  	XrmRepresentation from_type;
  	char c;
  	XrmQuark names[2];
  
  	names[0] = _XrmInternalStringToQuark(s, p - s - 1, sig, False);
  	names[1] = NULLQUARK;
  	(void)XrmQGetResource(keysymdb, names, Qkeysym, &from_type, &result);
  	if (result.addr && (result.size > 1))
  	{
  	    val = 0;
  	    for (i = 0; i < result.size - 1; i++)
  	    {
  		c = ((char *)result.addr)[i];
  		if ('0' <= c && c <= '9') val = (val<<4)+c-'0';
  		else if ('a' <= c && c <= 'f') val = (val<<4)+c-'a'+10;
  		else if ('A' <= c && c <= 'F') val = (val<<4)+c-'A'+10;
  		else return NoSymbol;
  	    }
  	    return val;
  	}
      }
  
      if (*s == 'U') {
      	val = 0;
          for (p = &s[1]; *p; p++) {
              c = *p;
  	    if ('0' <= c && c <= '9') val = (val<<4)+c-'0';
  	    else if ('a' <= c && c <= 'f') val = (val<<4)+c-'a'+10;
  	    else if ('A' <= c && c <= 'F') val = (val<<4)+c-'A'+10;
  	    else return NoSymbol;
  	    if (val > 0x10ffff)
  		return NoSymbol;
  	}
  	if (val < 0x20 || (val > 0x7e && val < 0xa0))
  	    return NoSymbol;
  	if (val < 0x100)
  	    return val;
          return val | 0x01000000;
      }
  
      if (strlen(s) > 2 && s[0] == '0' && s[1] == 'x') {
          char *tmp = NULL;
          val = strtoul(s, &tmp, 16);
          if (val == ULONG_MAX || (tmp && *tmp != '\0'))
              return NoSymbol;
          else
              return val;
      }
  
      /* Stupid inconsistency between the headers and XKeysymDB: the former has
       * no separating underscore, while some XF86* syms in the latter did.
       * As a last ditch effort, try without. */
      if (strncmp(s, "XF86_", 5) == 0) {
          KeySym ret;
          char *tmp = strdup(s);
          if (!tmp)
              return NoSymbol;
          memmove(&tmp[4], &tmp[5], strlen(s) - 5 + 1);
          ret = XStringToKeysym(tmp);
          free(tmp);
          return ret;
      }
  
      return NoSymbol;
  }