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1d5ef583 | 1 | /* |
2 | * "$Id$" | |
3 | * | |
4 | * Mini-daemon utility functions for the Common UNIX Printing System (CUPS). | |
5 | * | |
4e8d321f | 6 | * Copyright 2007 by Apple Inc. |
1d5ef583 | 7 | * Copyright 1997-2005 by Easy Software Products. |
8 | * | |
9 | * These coded instructions, statements, and computer programs are the | |
4e8d321f | 10 | * property of Apple Inc. and are protected by Federal copyright |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
1d5ef583 | 14 | * |
15 | * Contents: | |
16 | * | |
f3e786fc | 17 | * cupsdCompareNames() - Compare two names. |
1d5ef583 | 18 | * cupsdSendIPPGroup() - Send a group tag. |
19 | * cupsdSendIPPHeader() - Send the IPP response header. | |
20 | * cupsdSendIPPInteger() - Send an integer attribute. | |
21 | * cupsdSendIPPString() - Send a string attribute. | |
22 | * cupsdSendIPPTrailer() - Send the end-of-message tag. | |
23 | */ | |
24 | ||
25 | /* | |
26 | * Include necessary headers... | |
27 | */ | |
28 | ||
29 | #include "util.h" | |
30 | ||
31 | ||
32 | /* | |
33 | * 'cupsdCompareNames()' - Compare two names. | |
34 | * | |
35 | * This function basically does a strcasecmp() of the two strings, | |
36 | * but is also aware of numbers so that "a2" < "a100". | |
37 | */ | |
38 | ||
39 | int /* O - Result of comparison */ | |
40 | cupsdCompareNames(const char *s, /* I - First string */ | |
41 | const char *t) /* I - Second string */ | |
42 | { | |
43 | int diff, /* Difference between digits */ | |
44 | digits; /* Number of digits */ | |
45 | ||
46 | ||
47 | /* | |
48 | * Loop through both names, returning only when a difference is | |
49 | * seen. Also, compare whole numbers rather than just characters, too! | |
50 | */ | |
51 | ||
52 | while (*s && *t) | |
53 | { | |
54 | if (isdigit(*s & 255) && isdigit(*t & 255)) | |
55 | { | |
56 | /* | |
57 | * Got a number; start by skipping leading 0's... | |
58 | */ | |
59 | ||
60 | while (*s == '0') | |
61 | s ++; | |
62 | while (*t == '0') | |
63 | t ++; | |
64 | ||
65 | /* | |
66 | * Skip equal digits... | |
67 | */ | |
68 | ||
69 | while (isdigit(*s & 255) && *s == *t) | |
70 | { | |
71 | s ++; | |
72 | t ++; | |
73 | } | |
74 | ||
75 | /* | |
76 | * Bounce out if *s and *t aren't both digits... | |
77 | */ | |
78 | ||
79 | if (isdigit(*s & 255) && !isdigit(*t & 255)) | |
80 | return (1); | |
81 | else if (!isdigit(*s & 255) && isdigit(*t & 255)) | |
82 | return (-1); | |
83 | else if (!isdigit(*s & 255) || !isdigit(*t & 255)) | |
84 | continue; | |
85 | ||
86 | if (*s < *t) | |
87 | diff = -1; | |
88 | else | |
89 | diff = 1; | |
90 | ||
91 | /* | |
92 | * Figure out how many more digits there are... | |
93 | */ | |
94 | ||
95 | digits = 0; | |
96 | s ++; | |
97 | t ++; | |
98 | ||
99 | while (isdigit(*s & 255)) | |
100 | { | |
101 | digits ++; | |
102 | s ++; | |
103 | } | |
104 | ||
105 | while (isdigit(*t & 255)) | |
106 | { | |
107 | digits --; | |
108 | t ++; | |
109 | } | |
110 | ||
111 | /* | |
112 | * Return if the number or value of the digits is different... | |
113 | */ | |
114 | ||
115 | if (digits < 0) | |
116 | return (-1); | |
117 | else if (digits > 0) | |
118 | return (1); | |
119 | else if (diff) | |
120 | return (diff); | |
121 | } | |
122 | else if (tolower(*s) < tolower(*t)) | |
123 | return (-1); | |
124 | else if (tolower(*s) > tolower(*t)) | |
125 | return (1); | |
126 | else | |
127 | { | |
128 | s ++; | |
129 | t ++; | |
130 | } | |
131 | } | |
132 | ||
133 | /* | |
134 | * Return the results of the final comparison... | |
135 | */ | |
136 | ||
137 | if (*s) | |
138 | return (1); | |
139 | else if (*t) | |
140 | return (-1); | |
141 | else | |
142 | return (0); | |
143 | } | |
144 | ||
145 | ||
146 | /* | |
147 | * 'cupsdSendIPPGroup()' - Send a group tag. | |
148 | */ | |
149 | ||
150 | void | |
151 | cupsdSendIPPGroup(ipp_tag_t group_tag) /* I - Group tag */ | |
152 | { | |
153 | /* | |
154 | * Send IPP group tag (1 byte)... | |
155 | */ | |
156 | ||
157 | putchar(group_tag); | |
158 | } | |
159 | ||
160 | ||
161 | /* | |
162 | * 'cupsdSendIPPHeader()' - Send the IPP response header. | |
163 | */ | |
164 | ||
165 | void | |
166 | cupsdSendIPPHeader( | |
167 | ipp_status_t status_code, /* I - Status code */ | |
168 | int request_id) /* I - Request ID */ | |
169 | { | |
170 | /* | |
171 | * Send IPP/1.1 response header: version number (2 bytes), status code | |
9d0c9f28 | 172 | * (2 bytes), and request ID (4 bytes)... |
1d5ef583 | 173 | */ |
174 | ||
175 | putchar(1); | |
176 | putchar(1); | |
177 | ||
1d5ef583 | 178 | putchar(status_code >> 8); |
179 | putchar(status_code); | |
180 | ||
181 | putchar(request_id >> 24); | |
182 | putchar(request_id >> 16); | |
183 | putchar(request_id >> 8); | |
184 | putchar(request_id); | |
185 | } | |
186 | ||
187 | ||
188 | /* | |
189 | * 'cupsdSendIPPInteger()' - Send an integer attribute. | |
190 | */ | |
191 | ||
192 | void | |
193 | cupsdSendIPPInteger( | |
194 | ipp_tag_t value_tag, /* I - Value tag */ | |
195 | const char *name, /* I - Attribute name */ | |
196 | int value) /* I - Attribute value */ | |
197 | { | |
198 | size_t len; /* Length of attribute name */ | |
199 | ||
200 | ||
201 | /* | |
202 | * Send IPP integer value: value tag (1 byte), name length (2 bytes), | |
b94db558 | 203 | * name string (without nul), value length (2 bytes), and value (4 bytes)... |
1d5ef583 | 204 | */ |
205 | ||
206 | putchar(value_tag); | |
207 | ||
208 | len = strlen(name); | |
209 | putchar(len >> 8); | |
210 | putchar(len); | |
211 | ||
212 | fputs(name, stdout); | |
213 | ||
b94db558 | 214 | putchar(0); |
215 | putchar(4); | |
216 | ||
1d5ef583 | 217 | putchar(value >> 24); |
218 | putchar(value >> 16); | |
219 | putchar(value >> 8); | |
220 | putchar(value); | |
221 | } | |
222 | ||
223 | ||
224 | /* | |
225 | * 'cupsdSendIPPString()' - Send a string attribute. | |
226 | */ | |
227 | ||
228 | void | |
229 | cupsdSendIPPString( | |
230 | ipp_tag_t value_tag, /* I - Value tag */ | |
231 | const char *name, /* I - Attribute name */ | |
232 | const char *value) /* I - Attribute value */ | |
233 | { | |
234 | size_t len; /* Length of attribute name */ | |
235 | ||
236 | ||
237 | /* | |
238 | * Send IPP string value: value tag (1 byte), name length (2 bytes), | |
239 | * name string (without nul), value length (2 bytes), and value string | |
240 | * (without nul)... | |
241 | */ | |
242 | ||
243 | putchar(value_tag); | |
244 | ||
245 | len = strlen(name); | |
246 | putchar(len >> 8); | |
247 | putchar(len); | |
248 | ||
249 | fputs(name, stdout); | |
250 | ||
251 | len = strlen(value); | |
252 | putchar(len >> 8); | |
253 | putchar(len); | |
254 | ||
255 | fputs(value, stdout); | |
256 | } | |
257 | ||
258 | ||
259 | /* | |
260 | * 'cupsdSendIPPTrailer()' - Send the end-of-message tag. | |
261 | */ | |
262 | ||
263 | void | |
264 | cupsdSendIPPTrailer(void) | |
265 | { | |
266 | putchar(IPP_TAG_END); | |
267 | fflush(stdout); | |
268 | } | |
269 | ||
270 | ||
271 | /* | |
272 | * End of "$Id$". | |
273 | */ |