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comparison mupdf-source/thirdparty/freeglut/src/util/xparsegeometry_repl.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 #include <stdlib.h>
2
3 /*
4 * Everything down to the end of the next two functions is copied from the X sources.
5 */
6
7 /*
8
9 Copyright 1985, 1986, 1987,1998 The Open Group
10
11 Permission to use, copy, modify, distribute, and sell this software and its
12 documentation for any purpose is hereby granted without fee, provided that
13 the above copyright notice appear in all copies and that both that
14 copyright notice and this permission notice appear in supporting
15 documentation.
16
17 The above copyright notice and this permission notice shall be included
18 in all copies or substantial portions of the Software.
19
20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
23 IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 OTHER DEALINGS IN THE SOFTWARE.
27
28 Except as contained in this notice, the name of The Open Group shall
29 not be used in advertising or otherwise to promote the sale, use or
30 other dealings in this Software without prior written authorization
31 from The Open Group.
32
33 */
34
35 #include "xparsegeometry_repl.h"
36
37 /*
38 * XParseGeometry parses strings of the form
39 * "=<width>x<height>{+-}<xoffset>{+-}<yoffset>", where
40 * width, height, xoffset, and yoffset are unsigned integers.
41 * Example: "=80x24+300-49"
42 * The equal sign is optional.
43 * It returns a bitmask that indicates which of the four values
44 * were actually found in the string. For each value found,
45 * the corresponding argument is updated; for each value
46 * not found, the corresponding argument is left unchanged.
47 */
48
49 static int
50 ReadInteger(char *string, char **NextString)
51 {
52 register int Result = 0;
53 int Sign = 1;
54
55 if (*string == '+')
56 string++;
57 else if (*string == '-')
58 {
59 string++;
60 Sign = -1;
61 }
62 for (; (*string >= '0') && (*string <= '9'); string++)
63 {
64 Result = (Result * 10) + (*string - '0');
65 }
66 *NextString = string;
67 if (Sign >= 0)
68 return Result;
69 else
70 return -Result;
71 }
72
73 int XParseGeometry (
74 const char *string,
75 int *x,
76 int *y,
77 unsigned int *width, /* RETURN */
78 unsigned int *height) /* RETURN */
79 {
80 int mask = NoValue;
81 register char *strind;
82 unsigned int tempWidth = 0, tempHeight = 0;
83 int tempX = 0, tempY = 0;
84 char *nextCharacter;
85
86 if ( (string == NULL) || (*string == '\0'))
87 return mask;
88 if (*string == '=')
89 string++; /* ignore possible '=' at beg of geometry spec */
90
91 strind = (char *)string;
92 if (*strind != '+' && *strind != '-' && *strind != 'x') {
93 tempWidth = ReadInteger(strind, &nextCharacter);
94 if (strind == nextCharacter)
95 return 0;
96 strind = nextCharacter;
97 mask |= WidthValue;
98 }
99
100 if (*strind == 'x' || *strind == 'X') {
101 strind++;
102 tempHeight = ReadInteger(strind, &nextCharacter);
103 if (strind == nextCharacter)
104 return 0;
105 strind = nextCharacter;
106 mask |= HeightValue;
107 }
108
109 if ((*strind == '+') || (*strind == '-')) {
110 if (*strind == '-') {
111 strind++;
112 tempX = -ReadInteger(strind, &nextCharacter);
113 if (strind == nextCharacter)
114 return 0;
115 strind = nextCharacter;
116 mask |= XNegative;
117 }
118 else
119 {
120 strind++;
121 tempX = ReadInteger(strind, &nextCharacter);
122 if (strind == nextCharacter)
123 return 0;
124 strind = nextCharacter;
125 }
126 mask |= XValue;
127 if ((*strind == '+') || (*strind == '-')) {
128 if (*strind == '-') {
129 strind++;
130 tempY = -ReadInteger(strind, &nextCharacter);
131 if (strind == nextCharacter)
132 return 0;
133 strind = nextCharacter;
134 mask |= YNegative;
135 }
136 else
137 {
138 strind++;
139 tempY = ReadInteger(strind, &nextCharacter);
140 if (strind == nextCharacter)
141 return 0;
142 strind = nextCharacter;
143 }
144 mask |= YValue;
145 }
146 }
147
148 /* If strind isn't at the end of the string the it's an invalid
149 geometry specification. */
150
151 if (*strind != '\0') return 0;
152
153 if (mask & XValue)
154 *x = tempX;
155 if (mask & YValue)
156 *y = tempY;
157 if (mask & WidthValue)
158 *width = tempWidth;
159 if (mask & HeightValue)
160 *height = tempHeight;
161 return mask;
162 }