1 /* Miscellaneous declarations.
2 Copyright (C) 1996-2005 Free Software Foundation, Inc.
4 This file is part of GNU Wget.
6 GNU Wget is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 GNU Wget is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with Wget; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 In addition, as a special exception, the Free Software Foundation
21 gives permission to link the code of its release of Wget with the
22 OpenSSL project's "OpenSSL" library (or with modified versions of it
23 that use the same license as the "OpenSSL" library), and distribute
24 the linked executables. You must obey the GNU General Public License
25 in all respects for all of the code used other than "OpenSSL". If you
26 modify this file, you may extend this exception to your version of the
27 file, but you are not obligated to do so. If you do not wish to do
28 so, delete this exception statement from your version. */
30 /* This file contains declarations that are universally useful and
31 those that don't fit elsewhere. It also includes sysdep.h which
32 includes some often-needed system includes, like the obnoxious
33 <time.h> inclusion. */
38 /* Disable assertions when debug support is not compiled in. */
43 /* Is OpenSSL or GNUTLS available? */
44 #if defined HAVE_LIBSSL || defined HAVE_LIBGNUTLS
48 /* `gettext (FOO)' is long to write, so we use `_(FOO)'. If NLS is
49 unavailable, _(STRING) simply returns STRING. */
51 # define _(string) gettext (string)
52 # ifdef HAVE_LIBINTL_H
54 # else /* not HAVE_LIBINTL_H */
55 const char *gettext ();
56 # endif /* not HAVE_LIBINTL_H */
57 #else /* not HAVE_NLS */
58 # define _(string) (string)
59 #endif /* not HAVE_NLS */
61 /* A pseudo function call that serves as a marker for the automated
62 extraction of messages, but does not call gettext(). The run-time
63 translation is done at a different place in the code. The purpose
64 of the N_("...") call is to make the message snarfer aware that the
65 "..." string needs to be translated. STRING should be a string
66 literal. Concatenated strings and other string expressions won't
67 work. The macro's expansion is not parenthesized, so that it is
68 suitable as initializer for static 'char[]' or 'const char[]'
69 variables. -- explanation partly taken from GNU make. */
70 #define N_(string) string
72 /* I18N NOTE: You will notice that none of the DEBUGP messages are
73 marked as translatable. This is intentional, for a few reasons:
75 1) The debug messages are not meant for the users to look at, but
76 for the developers; as such, they should be considered more like
77 source comments than real program output.
79 2) The messages are numerous, and yet they are random and frivolous
80 ("double yuck!" and such). There would be a lot of work with no
83 3) Finally, the debug messages are meant to be a clue for me to
84 debug problems with Wget. If I get them in a language I don't
85 understand, debugging will become a new challenge of its own! */
88 /* Include these, so random files need not include them. */
90 /* locale independent replacement for ctype.h */
91 #include "safe-ctype.h"
93 /* Conditionalize the use of GCC's __attribute__((format)) and
94 __builtin_expect features using macros. */
96 #if defined(__GNUC__) && __GNUC__ >= 3
97 # define GCC_FORMAT_ATTR(a, b) __attribute__ ((format (printf, a, b)))
98 # define LIKELY(exp) __builtin_expect (!!(exp), 1)
99 # define UNLIKELY(exp) __builtin_expect ((exp), 0)
101 # define GCC_FORMAT_ATTR(a, b)
102 # define LIKELY(exp) (exp)
103 # define UNLIKELY(exp) (exp)
106 /* Execute the following statement if debugging is both enabled at
107 compile-time and requested at run-time; a no-op otherwise. */
110 # define IF_DEBUG if (UNLIKELY (opt.debug))
112 # define IF_DEBUG if (0)
115 /* Print ARGS if debugging is enabled and requested, otherwise do
116 nothing. This must be called with an extra level of parentheses
117 because it's not possible to pass a variable number of arguments to
118 a macro (in portable C89). ARGS are like arguments to printf. */
120 #define DEBUGP(args) do { IF_DEBUG { debug_logprintf args; } } while (0)
122 /* Define an integer type that works for file sizes, content lengths,
123 and such. Normally we could just use off_t, but off_t is always
124 32-bit on Windows. */
128 # define SIZEOF_WGINT SIZEOF_OFF_T
130 /* Pick the strtol-like function that will work with wgint. */
131 # if SIZEOF_WGINT == SIZEOF_LONG
132 # define str_to_wgint strtol
133 # define WGINT_MAX LONG_MAX
135 # define WGINT_MAX LLONG_MAX
137 # define str_to_wgint strtoll
138 # elif defined HAVE_STRTOIMAX /* HPUX 11.0 has strtoimax, but no strtoll */
139 # define str_to_wgint strtoimax
141 # define str_to_wgint strtoll
142 # define NEED_STRTOLL
143 # define strtoll_type long long
146 #endif /* not WINDOWS */
148 /* Declare our strtoll replacement. */
150 strtoll_type strtoll (const char *, char **, int);
153 /* Now define a large numeric type useful for storing sizes of *sums*
154 of downloads, such as the value of the --quota option. This should
155 be a type able to hold 2G+ values even on systems without large
156 file support. (It is useful to limit Wget's download quota to say
157 10G even if a single file cannot be that large.)
159 To make sure we get the largest size possible, we use `double' on
160 systems without a 64-bit integral type. (Since it is used in very
161 few places in Wget, this is acceptable.) */
163 #if SIZEOF_WGINT >= 8
165 typedef wgint SUM_SIZE_INT;
167 /* On systems without LFS, use double, which buys us integers up to 2^53. */
168 typedef double SUM_SIZE_INT;
173 /* Everything uses this, so include them here directly. */
176 /* Likewise for logging functions. */
179 /* Useful macros used across the code: */
181 /* The number of elements in an array. For example:
182 static char a[] = "foo"; -- countof(a) == 4 (note terminating \0)
183 int a[5] = {1, 2}; -- countof(a) == 5
184 char *a[] = { -- countof(a) == 3
187 #define countof(array) (sizeof (array) / sizeof ((array)[0]))
189 /* Zero out a value. */
190 #define xzero(x) memset (&(x), '\0', sizeof (x))
192 /* Convert an ASCII hex digit to the corresponding number between 0
193 and 15. H should be a hexadecimal digit that satisfies isxdigit;
194 otherwise, the result is undefined. */
195 #define XDIGIT_TO_NUM(h) ((h) < 'A' ? (h) - '0' : TOUPPER (h) - 'A' + 10)
196 #define X2DIGITS_TO_NUM(h1, h2) ((XDIGIT_TO_NUM (h1) << 4) + XDIGIT_TO_NUM (h2))
198 /* The reverse of the above: convert a number in the [0, 16) range to
199 the ASCII representation of the corresponding hexadecimal digit.
200 `+ 0' is there so you can't accidentally use it as an lvalue. */
201 #define XNUM_TO_DIGIT(x) ("0123456789ABCDEF"[x] + 0)
202 #define XNUM_TO_digit(x) ("0123456789abcdef"[x] + 0)
204 /* Copy the data delimited with BEG and END to alloca-allocated
205 storage, and zero-terminate it. Arguments are evaluated only once,
206 in the order BEG, END, PLACE. */
207 #define BOUNDED_TO_ALLOCA(beg, end, place) do { \
208 const char *BTA_beg = (beg); \
209 int BTA_len = (end) - BTA_beg; \
210 char **BTA_dest = &(place); \
211 *BTA_dest = alloca (BTA_len + 1); \
212 memcpy (*BTA_dest, BTA_beg, BTA_len); \
213 (*BTA_dest)[BTA_len] = '\0'; \
216 /* Return non-zero if string bounded between BEG and END is equal to
217 STRING_LITERAL. The comparison is case-sensitive. */
218 #define BOUNDED_EQUAL(beg, end, string_literal) \
219 ((end) - (beg) == sizeof (string_literal) - 1 \
220 && !memcmp (beg, string_literal, sizeof (string_literal) - 1))
222 /* The same as above, except the comparison is case-insensitive. */
223 #define BOUNDED_EQUAL_NO_CASE(beg, end, string_literal) \
224 ((end) - (beg) == sizeof (string_literal) - 1 \
225 && !strncasecmp (beg, string_literal, sizeof (string_literal) - 1))
227 /* Like ptr=strdup(str), but allocates the space for PTR on the stack.
228 This cannot be an expression because this is not portable:
229 #define STRDUP_ALLOCA(str) (strcpy (alloca (strlen (str) + 1), str))
230 The problem is that some compilers can't handle alloca() being an
231 argument to a function. */
233 #define STRDUP_ALLOCA(ptr, str) do { \
234 char **SA_dest = &(ptr); \
235 const char *SA_src = (str); \
236 *SA_dest = (char *)alloca (strlen (SA_src) + 1); \
237 strcpy (*SA_dest, SA_src); \
240 /* Generally useful if you want to avoid arbitrary size limits but
241 don't need a full dynamic array. Assumes that BASEVAR points to a
242 malloced array of TYPE objects (or possibly a NULL pointer, if
243 SIZEVAR is 0), with the total size stored in SIZEVAR. This macro
244 will realloc BASEVAR as necessary so that it can hold at least
245 NEEDED_SIZE objects. The reallocing is done by doubling, which
246 ensures constant amortized time per element. */
248 #define DO_REALLOC(basevar, sizevar, needed_size, type) do { \
249 long DR_needed_size = (needed_size); \
250 long DR_newsize = 0; \
251 while ((sizevar) < (DR_needed_size)) { \
252 DR_newsize = sizevar << 1; \
253 if (DR_newsize < 16) \
255 (sizevar) = DR_newsize; \
258 basevar = xrealloc (basevar, DR_newsize * sizeof (type)); \
261 /* Used to print pointers (usually for debugging). Print pointers
262 using printf ("0x%0*lx", PTR_FORMAT (p)). (%p is too unpredictable;
263 some implementations prepend 0x, while some don't, and most don't
264 0-pad the address.) */
265 #define PTR_FORMAT(p) (int) (2 * sizeof (void *)), (unsigned long) (p)
267 extern const char *exec_name;
269 /* Document type ("dt") flags */
272 TEXTHTML = 0x0001, /* document is of type text/html
273 or application/xhtml+xml */
274 RETROKF = 0x0002, /* retrieval was OK */
275 HEAD_ONLY = 0x0004, /* only send the HEAD request */
276 SEND_NOCACHE = 0x0008, /* send Pragma: no-cache directive */
277 ACCEPTRANGES = 0x0010, /* Accept-ranges header was found */
278 ADDED_HTML_EXTENSION = 0x0020 /* added ".html" extension due to -E */
281 /* Universal error type -- used almost everywhere. Error reporting of
282 this detail is not generally used or needed and should be
287 NOCONERROR, HOSTERR, CONSOCKERR, CONERROR, CONSSLERR,
288 CONIMPOSSIBLE, NEWLOCATION, NOTENOUGHMEM, CONPORTERR, CONCLOSED,
290 FTPOK, FTPLOGINC, FTPLOGREFUSED, FTPPORTERR, FTPSYSERR,
291 FTPNSFOD, FTPRETROK, FTPUNKNOWNTYPE, FTPRERR, FTPREXC,
293 FTPSRVERR, FTPRETRINT, FTPRESTFAIL, URLERROR, FOPENERR,
294 FOPEN_EXCL_ERR, FWRITEERR, HOK, HLEXC, HEOF,
296 HERR, RETROK, RECLEVELEXC, FTPACCDENIED, WRONGCODE,
297 FTPINVPASV, FTPNOPASV, CONTNOTSUPPORTED, RETRUNNEEDED, RETRFINISHED,
299 READERR, TRYLIMEXC, URLBADPATTERN, FILEBADFILE, RANGEERR,
300 RETRBADPATTERN, RETNOTSUP, ROBOTSOK, NOROBOTS, PROXERR,
302 AUTHFAILED, QUOTEXC, WRITEFAILED, SSLINITFAILED