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 *p = '\0';
83 return(buf);
84 }
85
86 PR_IMPLEMENT(const char *)
PR_ErrorToString(PRErrorCode code,PRLanguageCode language)87 PR_ErrorToString(PRErrorCode code, PRLanguageCode language)
88 {
89 /* static buffer only used if code is using inconsistent error message
90 * numbers, so just ignore the possible thread contention
91 */
92 static char buffer[25];
93
94 const char *msg;
95 int offset;
96 PRErrorCode table_num;
97 struct PRErrorTableList *et;
98 int started = 0;
99 char *cp;
100
101 for (et = Table_List; et; et = et->next) {
102 if (et->table->base <= code &&
103 et->table->base + et->table->n_msgs > code) {
104 /* This is the right table */
105 if (callback_lookup) {
106 msg = callback_lookup(code, language, et->table,
107 callback_private, et->table_private);
108 if (msg) return msg;
109 }
110
111 return(et->table->msgs[code - et->table->base].en_text);
112 }
113 }
114
115 if (code >= 0 && code < 256) {
116 return strerror(code);
117 }
118
119 offset = (int) (code & ((1<<ERRCODE_RANGE)-1));
120 table_num = code - offset;
121 strcpy (buffer, "Unknown code ");
122 if (table_num) {
123 strcat(buffer, error_table_name (table_num));
124 strcat(buffer, " ");
125 }
126 for (cp = buffer; *cp; cp++)
127 ;
128 if (offset >= 100) {
129 *cp++ = (char)('0' + offset / 100);
130 offset %= 100;
131 started++;
132 }
133 if (started || offset >= 10) {
134 *cp++ = (char)('0' + offset / 10);
135 offset %= 10;
136 }
137 *cp++ = (char)('0' + offset);
138 *cp = '\0';
139 return(buffer);
140 }
141
142 PR_IMPLEMENT(const char *)
PR_ErrorToName(PRErrorCode code)143 PR_ErrorToName(PRErrorCode code)
144 {
145 struct PRErrorTableList *et;
146
147 for (et = Table_List; et; et = et->next) {
148 if (et->table->base <= code &&
149 et->table->base + et->table->n_msgs > code) {
150 /* This is the right table */
151 return(et->table->msgs[code - et->table->base].name);
152 }
153 }
154
155 return 0;
156 }
157
158 PR_IMPLEMENT(const char * const *)
PR_ErrorLanguages(void)159 PR_ErrorLanguages(void)
160 {
161 return callback_languages;
162 }
163
164 PR_IMPLEMENT(PRErrorCode)
PR_ErrorInstallTable(const struct PRErrorTable * table)165 PR_ErrorInstallTable(const struct PRErrorTable *table)
166 {
167 struct PRErrorTableList * new_et;
168
169 new_et = (struct PRErrorTableList *)
170 PR_Malloc(sizeof(struct PRErrorTableList));
171 if (!new_et)
172 return errno; /* oops */
173 new_et->table = table;
174 if (callback_newtable) {
175 new_et->table_private = callback_newtable(table, callback_private);
176 } else {
177 new_et->table_private = 0;
178 }
179 new_et->next = Table_List;
180 Table_List = new_et;
181 return 0;
182 }
183
184 PR_IMPLEMENT(void)
PR_ErrorInstallCallback(const char * const * languages,PRErrorCallbackLookupFn * lookup,PRErrorCallbackNewTableFn * newtable,struct PRErrorCallbackPrivate * cb_private)185 PR_ErrorInstallCallback(const char * const * languages,
186 PRErrorCallbackLookupFn *lookup,
187 PRErrorCallbackNewTableFn *newtable,
188 struct PRErrorCallbackPrivate *cb_private)
189 {
190 struct PRErrorTableList *et;
191
192 assert(strcmp(languages[0], "i-default") == 0);
193 assert(strcmp(languages[1], "en") == 0);
194
195 callback_languages = languages;
196 callback_lookup = lookup;
197 callback_newtable = newtable;
198 callback_private = cb_private;
199
200 if (callback_newtable) {
201 for (et = Table_List; et; et = et->next) {
202 et->table_private = callback_newtable(et->table, callback_private);
203 }
204 }
205 }
206