/* $Xorg: ParseGeom.c,v 1.4 2001/02/09 02:03:35 xorgcvs Exp $ */ /* 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. */ /* $XFree86: xc/lib/X11/ParseGeom.c,v 1.3 2001/12/14 19:54:03 dawes Exp $ */ #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); }