1 /* Miscellaneous declarations.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
5 This file is part of GNU Wget.
7 GNU Wget is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 GNU Wget is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Wget. If not, see <http://www.gnu.org/licenses/>.
20 Additional permission under GNU GPL version 3 section 7
22 If you modify this program, or any covered work, by linking or
23 combining it with the OpenSSL project's OpenSSL library (or a
24 modified version of that library), containing parts covered by the
25 terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
26 grants you additional permission to convey the resulting work.
27 Corresponding Source for a non-source form of such a combination
28 shall include the source code for the parts of OpenSSL used as well
29 as that of the covered work. */
31 /* This file contains declarations that are universally useful and
32 those that don't fit elsewhere. It also includes sysdep.h which
33 includes some often-needed system includes, like the obnoxious
34 <time.h> inclusion. */
41 /* Include these, so random files need not include them. */
44 /* Disable assertions when debug support is not compiled in. */
49 /* Is OpenSSL or GNUTLS available? */
50 #if defined HAVE_LIBSSL || defined HAVE_LIBGNUTLS
54 /* `gettext (FOO)' is long to write, so we use `_(FOO)'. If NLS is
55 unavailable, _(STRING) simply returns STRING. */
57 #define _(string) gettext (string)
59 /* A pseudo function call that serves as a marker for the automated
60 extraction of messages, but does not call gettext(). The run-time
61 translation is done at a different place in the code. The purpose
62 of the N_("...") call is to make the message snarfer aware that the
63 "..." string needs to be translated. STRING should be a string
64 literal. Concatenated strings and other string expressions won't
65 work. The macro's expansion is not parenthesized, so that it is
66 suitable as initializer for static 'char[]' or 'const char[]'
67 variables. -- explanation partly taken from GNU make. */
68 #define N_(string) string
70 /* I18N NOTE: You will notice that none of the DEBUGP messages are
71 marked as translatable. This is intentional, for a few reasons:
73 1) The debug messages are not meant for the users to look at, but
74 for the developers; as such, they should be considered more like
75 source comments than real program output.
77 2) The messages are numerous, and yet they are random and frivolous
78 ("double yuck!" and such). There would be a lot of work with no
81 3) Finally, the debug messages are meant to be a clue for me to
82 debug problems with Wget. If I get them in a language I don't
83 understand, debugging will become a new challenge of its own! */
85 /* locale independent replacement for ctype.h */
88 /* Conditionalize the use of GCC's __attribute__((format)) and
89 __builtin_expect features using macros. */
91 #if defined(__GNUC__) && __GNUC__ >= 3
92 # define GCC_FORMAT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
93 # define LIKELY(exp) __builtin_expect (!!(exp), 1)
94 # define UNLIKELY(exp) __builtin_expect ((exp), 0)
96 # define GCC_FORMAT_ATTR(a, b)
97 # define LIKELY(exp) (exp)
98 # define UNLIKELY(exp) (exp)
101 /* Execute the following statement if debugging is both enabled at
102 compile-time and requested at run-time; a no-op otherwise. */
105 # define IF_DEBUG if (UNLIKELY (opt.debug))
107 # define IF_DEBUG if (0)
110 /* Print ARGS if debugging is enabled and requested, otherwise do
111 nothing. This must be called with an extra level of parentheses
112 because it's not possible to pass a variable number of arguments to
113 a macro (in portable C89). ARGS are like arguments to printf. */
115 #define DEBUGP(args) do { IF_DEBUG { debug_logprintf args; } } while (0)
117 /* Pick an integer type large enough for file sizes, content lengths,
118 and such. Because today's files can be very large, it should be a
119 signed integer at least 64 bits wide. This can't be typedeffed to
120 off_t because: a) off_t is always 32-bit on Windows, and b) we
121 don't necessarily want to tie having a 64-bit type for internal
122 calculations to having LFS support. */
125 /* nothing to do, see mswindows.h */
126 #elif SIZEOF_LONG >= 8
127 /* long is large enough, so use it. */
129 # define SIZEOF_WGINT SIZEOF_LONG
130 #elif SIZEOF_LONG_LONG >= 8
131 /* long long is large enough and available, use that */
132 typedef long long wgint;
133 # define SIZEOF_WGINT SIZEOF_LONG_LONG
135 typedef int64_t wgint;
136 # define SIZEOF_WGINT 8
137 #elif SIZEOF_OFF_T >= 8
138 /* In case off_t is typedeffed to a large non-standard type that our
141 # define SIZEOF_WGINT SIZEOF_OFF_T
143 /* Fall back to using long, which is always available and in most
144 cases large enough. */
146 # define SIZEOF_WGINT SIZEOF_LONG
149 /* Pick a strtol-compatible function that will work with wgint. The
150 choices are strtol, strtoll, or our own implementation of strtoll
151 in cmpt.c, activated with NEED_STRTOLL. */
154 /* nothing to do, see mswindows.h */
155 #elif SIZEOF_WGINT == SIZEOF_LONG
156 # define str_to_wgint strtol
157 #elif SIZEOF_WGINT == SIZEOF_LONG_LONG
158 # define str_to_wgint strtoll
159 # ifndef HAVE_STRTOLL
160 # define NEED_STRTOLL
161 # define strtoll_type long long
164 /* wgint has a strange size; synthesize strtoll and use it. */
165 # define str_to_wgint strtoll
166 # define NEED_STRTOLL
167 # define strtoll_type wgint
170 #define WGINT_MAX TYPE_MAXIMUM (wgint)
172 /* Declare our strtoll replacement. */
174 strtoll_type strtoll (const char *, char **, int);
177 /* Now define a large numeric type useful for storing sizes of *sums*
178 of downloads, such as the value of the --quota option. This should
179 be a type able to hold 2G+ values even on systems without large
180 file support. (It is useful to limit Wget's download quota to say
181 10G even if a single file cannot be that large.)
183 To make sure we get the largest size possible, we use `double' on
184 systems without a 64-bit integral type. (Since it is used in very
185 few places in Wget, this is acceptable.) */
187 #if SIZEOF_WGINT >= 8
189 typedef wgint SUM_SIZE_INT;
191 /* On systems without LFS, use double, which buys us integers up to 2^53. */
192 typedef double SUM_SIZE_INT;
197 /* Everything uses this, so include them here directly. */
200 /* Likewise for logging functions. */
203 /* Useful macros used across the code: */
205 /* The number of elements in an array. For example:
206 static char a[] = "foo"; -- countof(a) == 4 (note terminating \0)
207 int a[5] = {1, 2}; -- countof(a) == 5
208 char *a[] = { -- countof(a) == 3
211 #define countof(array) (sizeof (array) / sizeof ((array)[0]))
213 /* Zero out a value. */
214 #define xzero(x) memset (&(x), '\0', sizeof (x))
216 /* Convert an ASCII hex digit to the corresponding number between 0
217 and 15. H should be a hexadecimal digit that satisfies isxdigit;
218 otherwise, the result is undefined. */
219 #define XDIGIT_TO_NUM(h) ((h) < 'A' ? (h) - '0' : c_toupper (h) - 'A' + 10)
220 #define X2DIGITS_TO_NUM(h1, h2) ((XDIGIT_TO_NUM (h1) << 4) + XDIGIT_TO_NUM (h2))
222 /* The reverse of the above: convert a number in the [0, 16) range to
223 the ASCII representation of the corresponding hexadecimal digit.
224 `+ 0' is there so you can't accidentally use it as an lvalue. */
225 #define XNUM_TO_DIGIT(x) ("0123456789ABCDEF"[x] + 0)
226 #define XNUM_TO_digit(x) ("0123456789abcdef"[x] + 0)
228 /* Copy the data delimited with BEG and END to alloca-allocated
229 storage, and zero-terminate it. Arguments are evaluated only once,
230 in the order BEG, END, PLACE. */
231 #define BOUNDED_TO_ALLOCA(beg, end, place) do { \
232 const char *BTA_beg = (beg); \
233 int BTA_len = (end) - BTA_beg; \
234 char **BTA_dest = &(place); \
235 *BTA_dest = alloca (BTA_len + 1); \
236 memcpy (*BTA_dest, BTA_beg, BTA_len); \
237 (*BTA_dest)[BTA_len] = '\0'; \
240 /* Return non-zero if string bounded between BEG and END is equal to
241 STRING_LITERAL. The comparison is case-sensitive. */
242 #define BOUNDED_EQUAL(beg, end, string_literal) \
243 ((end) - (beg) == sizeof (string_literal) - 1 \
244 && !memcmp (beg, string_literal, sizeof (string_literal) - 1))
246 /* The same as above, except the comparison is case-insensitive. */
247 #define BOUNDED_EQUAL_NO_CASE(beg, end, string_literal) \
248 ((end) - (beg) == sizeof (string_literal) - 1 \
249 && !strncasecmp (beg, string_literal, sizeof (string_literal) - 1))
251 /* Like ptr=strdup(str), but allocates the space for PTR on the stack.
252 This cannot be an expression because this is not portable:
253 #define STRDUP_ALLOCA(str) (strcpy (alloca (strlen (str) + 1), str))
254 The problem is that some compilers can't handle alloca() being an
255 argument to a function. */
257 #define STRDUP_ALLOCA(ptr, str) do { \
258 char **SA_dest = &(ptr); \
259 const char *SA_src = (str); \
260 *SA_dest = (char *)alloca (strlen (SA_src) + 1); \
261 strcpy (*SA_dest, SA_src); \
264 /* Generally useful if you want to avoid arbitrary size limits but
265 don't need a full dynamic array. Assumes that BASEVAR points to a
266 malloced array of TYPE objects (or possibly a NULL pointer, if
267 SIZEVAR is 0), with the total size stored in SIZEVAR. This macro
268 will realloc BASEVAR as necessary so that it can hold at least
269 NEEDED_SIZE objects. The reallocing is done by doubling, which
270 ensures constant amortized time per element. */
272 #define DO_REALLOC(basevar, sizevar, needed_size, type) do { \
273 long DR_needed_size = (needed_size); \
274 long DR_newsize = 0; \
275 while ((sizevar) < (DR_needed_size)) { \
276 DR_newsize = sizevar << 1; \
277 if (DR_newsize < 16) \
279 (sizevar) = DR_newsize; \
282 basevar = xrealloc (basevar, DR_newsize * sizeof (type)); \
285 /* Used to print pointers (usually for debugging). Print pointers
286 using printf ("0x%0*lx", PTR_FORMAT (p)). (%p is too unpredictable;
287 some implementations prepend 0x, while some don't, and most don't
288 0-pad the address.) */
289 #define PTR_FORMAT(p) (int) (2 * sizeof (void *)), (unsigned long) (p)
291 extern const char *exec_name;
293 /* Document type ("dt") flags */
296 TEXTHTML = 0x0001, /* document is of type text/html
297 or application/xhtml+xml */
298 RETROKF = 0x0002, /* retrieval was OK */
299 HEAD_ONLY = 0x0004, /* only send the HEAD request */
300 SEND_NOCACHE = 0x0008, /* send Pragma: no-cache directive */
301 ACCEPTRANGES = 0x0010, /* Accept-ranges header was found */
302 ADDED_HTML_EXTENSION = 0x0020 /* added ".html" extension due to -E */
305 /* Universal error type -- used almost everywhere. Error reporting of
306 this detail is not generally used or needed and should be
311 NOCONERROR, HOSTERR, CONSOCKERR, CONERROR, CONSSLERR,
312 CONIMPOSSIBLE, NEWLOCATION, NOTENOUGHMEM, CONPORTERR, CONCLOSED,
314 FTPOK, FTPLOGINC, FTPLOGREFUSED, FTPPORTERR, FTPSYSERR,
315 FTPNSFOD, FTPRETROK, FTPUNKNOWNTYPE, FTPRERR, FTPREXC,
317 FTPSRVERR, FTPRETRINT, FTPRESTFAIL, URLERROR, FOPENERR,
318 FOPEN_EXCL_ERR, FWRITEERR, HOK, HLEXC, HEOF,
320 HERR, RETROK, RECLEVELEXC, FTPACCDENIED, WRONGCODE,
321 FTPINVPASV, FTPNOPASV, CONTNOTSUPPORTED, RETRUNNEEDED, RETRFINISHED,
323 READERR, TRYLIMEXC, URLBADPATTERN, FILEBADFILE, RANGEERR,
324 RETRBADPATTERN, RETNOTSUP, ROBOTSOK, NOROBOTS, PROXERR,
326 AUTHFAILED, QUOTEXC, WRITEFAILED, SSLINITFAILED