/* Copyright Massachusetts Institute of Technology 1985, 1986, 1987 */ /* $XConsortium: XParseGeom.c,v 11.18 91/02/21 17:23:05 rws Exp $ */ /* 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, and that the name of M.I.T. not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. M.I.T. makes no representations about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty. */ #include "Xlibint.h" #include "Xutil.h" #ifdef notdef /* *Returns pointer to first char ins search which is also in what, else NULL. */ static char *strscan (search, what) char *search, *what; { int i, len = strlen (what); char c; while ((c = *(search++)) != NULL) for (i = 0; i < len; i++) if (c == what [i]) return (--search); return (NULL); } #endif /* * 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(string, NextString) register 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); } #if NeedFunctionPrototypes int XParseGeometry ( _Xconst char *string, int *x, int *y, unsigned int *width, /* RETURN */ unsigned int *height) /* RETURN */ #else int XParseGeometry (string, x, y, width, height) char *string; int *x, *y; unsigned int *width, *height; /* RETURN */ #endif { int mask = NoValue; register char *strind; unsigned int tempWidth, tempHeight; int tempX, tempY; 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); }