1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
4
5
6
7
8 /*
9
10 Copyright 1987, 1988 by the Student Information Processing Board
11 of the Massachusetts Institute of Technology
12
13 Permission to use, copy, modify, and distribute this software
14 and its documentation for any purpose and without fee is
15 hereby granted, provided that the above copyright notice
16 appear in all copies and that both that copyright notice and
17 this permission notice appear in supporting documentation,
18 and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
19 used in advertising or publicity pertaining to distribution
20 of the software without specific, written prior permission.
21 M.I.T. and the M.I.T. S.I.P.B. make no representations about
22 the suitability of this software for any purpose. It is
23 provided "as is" without express or implied warranty.
24
25 */
26
27 #include <string.h>
28 #include <assert.h>
29 #include <errno.h>
30 #include "prmem.h"
31 #include "prerror.h"
32
33 #define ERRCODE_RANGE 8 /* # of bits to shift table number */
34 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */
35
36 #ifdef NEED_SYS_ERRLIST
37 extern char const * const sys_errlist[];
38 extern const int sys_nerr;
39 #endif
40
41 /* List of error tables */
42 struct PRErrorTableList {
43 struct PRErrorTableList *next;
44 const struct PRErrorTable *table;
45 struct PRErrorCallbackTablePrivate *table_private;
46 };
47 static struct PRErrorTableList * Table_List = (struct PRErrorTableList *) NULL;
48
49 /* Supported languages */
50 static const char * default_languages[] = { "i-default", "en", 0 };
51 static const char * const * callback_languages = default_languages;
52
53 /* Callback info */
54 static struct PRErrorCallbackPrivate *callback_private = 0;
55 static PRErrorCallbackLookupFn *callback_lookup = 0;
56 static PRErrorCallbackNewTableFn *callback_newtable = 0;
57
58
59 static const char char_set[] =
60 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
61
62 static const char *
error_table_name(PRErrorCode num)63 error_table_name (PRErrorCode num)
64 {
65 static char buf[6]; /* only used if internal code problems exist */
66
67 long ch;
68 int i;
69 char *p;
70
71 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
72 p = buf;
73 num >>= ERRCODE_RANGE;
74 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
75 num &= 077777777;
76 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
77 for (i = 4; i >= 0; i--) {
78 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
79 if (ch != 0) {
80 *p++ = char_set[ch-1];
81 }
82 }
83 *p = '\0';
84 return(buf);
85 }
86
87 PR_IMPLEMENT(const char *)
PR_ErrorToString(PRErrorCode code,PRLanguageCode language)88 PR_ErrorToString(PRErrorCode code, PRLanguageCode language)
89 {
90 /* static buffer only used if code is using inconsistent error message
91 * numbers, so just ignore the possible thread contention
92 */
93 static char buffer[25];
94
95 const char *msg;
96 int offset;
97 PRErrorCode table_num;
98 struct PRErrorTableList *et;
99 int started = 0;
100 char *cp;
101
102 for (et = Table_List; et; et = et->next) {
103 if (et->table->base <= code &&
104 et->table->base + et->table->n_msgs > code) {
105 /* This is the right table */
106 if (callback_lookup) {
107 msg = callback_lookup(code, language, et->table,
108 callback_private, et->table_private);
109 if (msg) {
110 return msg;
111 }
112 }
113
114 return(et->table->msgs[code - et->table->base].en_text);
115 }
116 }
117
118 if (code >= 0 && code < 256) {
119 return strerror(code);
120 }
121
122 offset = (int) (code & ((1<<ERRCODE_RANGE)-1));
123 table_num = code - offset;
124 strcpy (buffer, "Unknown code ");
125 if (table_num) {
126 strcat(buffer, error_table_name (table_num));
127 strcat(buffer, " ");
128 }
129 for (cp = buffer; *cp; cp++)
130 ;
131 if (offset >= 100) {
132 *cp++ = (char)('0' + offset / 100);
133 offset %= 100;
134 started++;
135 }
136 if (started || offset >= 10) {
137 *cp++ = (char)('0' + offset / 10);
138 offset %= 10;
139 }
140 *cp++ = (char)('0' + offset);
141 *cp = '\0';
142 return(buffer);
143 }
144
145 PR_IMPLEMENT(const char *)
PR_ErrorToName(PRErrorCode code)146 PR_ErrorToName(PRErrorCode code)
147 {
148 struct PRErrorTableList *et;
149
150 for (et = Table_List; et; et = et->next) {
151 if (et->table->base <= code &&
152 et->table->base + et->table->n_msgs > code) {
153 /* This is the right table */
154 return(et->table->msgs[code - et->table->base].name);
155 }
156 }
157
158 return 0;
159 }
160
161 PR_IMPLEMENT(const char * const *)
PR_ErrorLanguages(void)162 PR_ErrorLanguages(void)
163 {
164 return callback_languages;
165 }
166
167 PR_IMPLEMENT(PRErrorCode)
PR_ErrorInstallTable(const struct PRErrorTable * table)168 PR_ErrorInstallTable(const struct PRErrorTable *table)
169 {
170 struct PRErrorTableList * new_et;
171
172 new_et = (struct PRErrorTableList *)
173 PR_Malloc(sizeof(struct PRErrorTableList));
174 if (!new_et) {
175 return errno; /* oops */
176 }
177 new_et->table = table;
178 if (callback_newtable) {
179 new_et->table_private = callback_newtable(table, callback_private);
180 } else {
181 new_et->table_private = 0;
182 }
183 new_et->next = Table_List;
184 Table_List = new_et;
185 return 0;
186 }
187
188 PR_IMPLEMENT(void)
PR_ErrorInstallCallback(const char * const * languages,PRErrorCallbackLookupFn * lookup,PRErrorCallbackNewTableFn * newtable,struct PRErrorCallbackPrivate * cb_private)189 PR_ErrorInstallCallback(const char * const * languages,
190 PRErrorCallbackLookupFn *lookup,
191 PRErrorCallbackNewTableFn *newtable,
192 struct PRErrorCallbackPrivate *cb_private)
193 {
194 struct PRErrorTableList *et;
195
196 assert(strcmp(languages[0], "i-default") == 0);
197 assert(strcmp(languages[1], "en") == 0);
198
199 callback_languages = languages;
200 callback_lookup = lookup;
201 callback_newtable = newtable;
202 callback_private = cb_private;
203
204 if (callback_newtable) {
205 for (et = Table_List; et; et = et->next) {
206 et->table_private = callback_newtable(et->table, callback_private);
207 }
208 }
209 }
210