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

Branch : - branch - master - tag -

• Show log

  Commit

• Author : matthieu
  Date : 2010-05-18 19:37:28
  Hash : aa3c9f93
  Message : Update to libX11 1.3.3. Tested on a bulk ports build by naddy@.

• lib/libX11/src/ParseGeom.c

• /*
  
  Copyright 1985, 1986, 1987,1998  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 "Xlibint.h"
  #include "Xutil.h"
  
  /*
   *    XParseGeometry parses strings of the form
   *   "=<width>x<height>{+-}<xoffset>{+-}<yoffset>", where
   *   width, height, xoffset, and yoffset are unsigned integers.
   *   Example:  "=80x24+300-49"
   *   The equal sign is optional.
   *   It returns a bitmask that indicates which of the four values
   *   were actually found in the string.  For each value found,
   *   the corresponding argument is updated;  for each value
   *   not found, the corresponding argument is left unchanged.
   */
  
  static int
  ReadInteger(char *string, char **NextString)
  {
      register int Result = 0;
      int Sign = 1;
  
      if (*string == '+')
  	string++;
      else if (*string == '-')
      {
  	string++;
  	Sign = -1;
      }
      for (; (*string >= '0') && (*string <= '9'); string++)
      {
  	Result = (Result * 10) + (*string - '0');
      }
      *NextString = string;
      if (Sign >= 0)
  	return (Result);
      else
  	return (-Result);
  }
  
  int
  XParseGeometry (
  _Xconst char *string,
  int *x,
  int *y,
  unsigned int *width,    /* RETURN */
  unsigned int *height)    /* RETURN */
  {
  	int mask = NoValue;
  	register char *strind;
  	unsigned int tempWidth = 0, tempHeight = 0;
  	int tempX = 0, tempY = 0;
  	char *nextCharacter;
  
  	if ( (string == NULL) || (*string == '\0')) return(mask);
  	if (*string == '=')
  		string++;  /* ignore possible '=' at beg of geometry spec */
  
  	strind = (char *)string;
  	if (*strind != '+' && *strind != '-' && *strind != 'x') {
  		tempWidth = ReadInteger(strind, &nextCharacter);
  		if (strind == nextCharacter)
  		    return (0);
  		strind = nextCharacter;
  		mask |= WidthValue;
  	}
  
  	if (*strind == 'x' || *strind == 'X') {
  		strind++;
  		tempHeight = ReadInteger(strind, &nextCharacter);
  		if (strind == nextCharacter)
  		    return (0);
  		strind = nextCharacter;
  		mask |= HeightValue;
  	}
  
  	if ((*strind == '+') || (*strind == '-')) {
  		if (*strind == '-') {
    			strind++;
  			tempX = -ReadInteger(strind, &nextCharacter);
  			if (strind == nextCharacter)
  			    return (0);
  			strind = nextCharacter;
  			mask |= XNegative;
  
  		}
  		else
  		{	strind++;
  			tempX = ReadInteger(strind, &nextCharacter);
  			if (strind == nextCharacter)
  			    return(0);
  			strind = nextCharacter;
  		}
  		mask |= XValue;
  		if ((*strind == '+') || (*strind == '-')) {
  			if (*strind == '-') {
  				strind++;
  				tempY = -ReadInteger(strind, &nextCharacter);
  				if (strind == nextCharacter)
  			    	    return(0);
  				strind = nextCharacter;
  				mask |= YNegative;
  
  			}
  			else
  			{
  				strind++;
  				tempY = ReadInteger(strind, &nextCharacter);
  				if (strind == nextCharacter)
  			    	    return(0);
  				strind = nextCharacter;
  			}
  			mask |= YValue;
  		}
  	}
  
  	/* If strind isn't at the end of the string the it's an invalid
  		geometry specification. */
  
  	if (*strind != '\0') return (0);
  
  	if (mask & XValue)
  	    *x = tempX;
   	if (mask & YValue)
  	    *y = tempY;
  	if (mask & WidthValue)
              *width = tempWidth;
  	if (mask & HeightValue)
              *height = tempHeight;
  	return (mask);
  }