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| -rw-r--r-- | src/wget.h | 412 |
1 files changed, 412 insertions, 0 deletions
diff --git a/src/wget.h b/src/wget.h new file mode 100644 index 0000000..0210659 --- /dev/null +++ b/src/wget.h @@ -0,0 +1,412 @@ +/* Miscellaneous declarations. + Copyright (C) 1996-2011, 2015, 2018 Free Software Foundation, Inc. + +This file is part of GNU Wget. + +GNU Wget is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3 of the License, or +(at your option) any later version. + +GNU Wget is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with Wget. If not, see <http://www.gnu.org/licenses/>. + +Additional permission under GNU GPL version 3 section 7 + +If you modify this program, or any covered work, by linking or +combining it with the OpenSSL project's OpenSSL library (or a +modified version of that library), containing parts covered by the +terms of the OpenSSL or SSLeay licenses, the Free Software Foundation +grants you additional permission to convey the resulting work. +Corresponding Source for a non-source form of such a combination +shall include the source code for the parts of OpenSSL used as well +as that of the covered work. */ + +/* This file contains declarations that are universally useful and + those that don't fit elsewhere. It also includes sysdep.h which + includes some often-needed system includes, like the obnoxious + <time.h> inclusion. */ + +#ifndef WGET_H +#define WGET_H + +#include "config.h" + +#if ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) +# define WINDOWS +#endif + +/* Include these, so random files need not include them. */ +#include "sysdep.h" + +/* Disable assertions when debug support is not compiled in. */ +#ifndef ENABLE_DEBUG +#ifndef NDEBUG +# define NDEBUG +#endif +#endif + +/* Is OpenSSL or GNUTLS available? */ +#if defined HAVE_LIBSSL || defined HAVE_LIBSSL32 || defined HAVE_LIBGNUTLS +# define HAVE_SSL +# define HAVE_HSTS /* There's no sense in enabling HSTS without SSL */ +#endif + +/* `gettext (FOO)' is long to write, so we use `_(FOO)'. If NLS is + unavailable, _(STRING) simply returns STRING. */ +#include "gettext.h" +#define _(STRING) gettext(STRING) + +/* A pseudo function call that serves as a marker for the automated + extraction of messages, but does not call gettext(). The run-time + translation is done at a different place in the code. The purpose + of the N_("...") call is to make the message snarfer aware that the + "..." string needs to be translated. STRING should be a string + literal. Concatenated strings and other string expressions won't + work. The macro's expansion is not parenthesized, so that it is + suitable as initializer for static 'char[]' or 'const char[]' + variables. -- explanation partly taken from GNU make. */ +#define N_(string) string + +#if HAVE_WCWIDTH && HAVE_MBTOWC +# define USE_NLS_PROGRESS_BAR 1 +#else +/* Just to be a little paranoid about it. */ +# undef USE_NLS_PROGRESS_BAR +#endif + +/* I18N NOTE: You will notice that none of the DEBUGP messages are + marked as translatable. This is intentional, for a few reasons: + + 1) The debug messages are not meant for the users to look at, but + for the developers; as such, they should be considered more like + source comments than real program output. + + 2) The messages are numerous, and yet they are random and frivolous + ("double yuck!" and such). There would be a lot of work with no + gain. + + 3) Finally, the debug messages are meant to be a clue for me to + debug problems with Wget. If I get them in a language I don't + understand, debugging will become a new challenge of its own! */ + +/* locale independent replacement for ctype.h */ +#include "c-ctype.h" + +/* Conditionalize the use of GCC's __attribute__((format)) and + __builtin_expect features using macros. */ + +#if defined(__GNUC__) && __GNUC__ >= 3 +# define GCC_FORMAT_ATTR(a, b) __attribute__ ((format (printf, a, b))) +# define LIKELY(exp) __builtin_expect (!!(exp), 1) +# define UNLIKELY(exp) __builtin_expect ((exp), 0) +#else +# define GCC_FORMAT_ATTR(a, b) +# define LIKELY(exp) (exp) +# define UNLIKELY(exp) (exp) +#endif + +/* Execute the following statement if debugging is both enabled at + compile-time and requested at run-time; a no-op otherwise. */ + +#ifdef ENABLE_DEBUG +# define IF_DEBUG if (UNLIKELY (opt.debug)) +#else +# define IF_DEBUG if (0) +#endif + +/* Print ARGS if debugging is enabled and requested, otherwise do + nothing. This must be called with an extra level of parentheses + because it's not possible to pass a variable number of arguments to + a macro (in portable C89). ARGS are like arguments to printf. */ + +#define DEBUGP(args) do { IF_DEBUG { debug_logprintf args; } } while (0) + +/* Pick an integer type large enough for file sizes, content lengths, + and such. Because today's files can be very large, it should be a + signed integer at least 64 bits wide. This can't be typedeffed to + off_t because: a) off_t is always 32-bit on Windows, and b) we + don't necessarily want to tie having a 64-bit type for internal + calculations to having LFS support. */ + +#ifdef WINDOWS + /* nothing to do, see mswindows.h */ +#elif SIZEOF_LONG >= 8 + /* long is large enough, so use it. */ + typedef long wgint; +# define SIZEOF_WGINT SIZEOF_LONG +#elif SIZEOF_LONG_LONG >= 8 + /* long long is large enough and available, use that */ + typedef long long wgint; +# define SIZEOF_WGINT SIZEOF_LONG_LONG +#elif HAVE_INT64_T + typedef int64_t wgint; +# define SIZEOF_WGINT 8 +#elif SIZEOF_OFF_T >= 8 + /* In case off_t is typedeffed to a large non-standard type that our + tests don't find. */ + typedef off_t wgint; +# define SIZEOF_WGINT SIZEOF_OFF_T +#else + /* Fall back to using long, which is always available and in most + cases large enough. */ + typedef long wgint; +# define SIZEOF_WGINT SIZEOF_LONG +#endif + +/* Pick a strtol-compatible function that will work with wgint. The + choices are strtol, strtoll, or our own implementation of strtoll + in cmpt.c, activated with NEED_STRTOLL. */ + +#ifdef WINDOWS + /* nothing to do, see mswindows.h */ +#elif SIZEOF_WGINT == SIZEOF_LONG +# define str_to_wgint strtol +#elif SIZEOF_WGINT == SIZEOF_LONG_LONG +# define str_to_wgint strtoll +# ifndef HAVE_STRTOLL +# define NEED_STRTOLL +# define strtoll_type long long +# endif +#else + /* wgint has a strange size; synthesize strtoll and use it. */ +# define str_to_wgint strtoll +# define NEED_STRTOLL +# define strtoll_type wgint +#endif + +#define WGINT_MAX TYPE_MAXIMUM (wgint) + +/* Declare our strtoll replacement. */ +#ifdef NEED_STRTOLL +strtoll_type strtoll (const char *, char **, int); +#endif + +/* Now define a large numeric type useful for storing sizes of *sums* + of downloads, such as the value of the --quota option. This should + be a type able to hold 2G+ values even on systems without large + file support. (It is useful to limit Wget's download quota to say + 10G even if a single file cannot be that large.) + + To make sure we get the largest size possible, we use `double' on + systems without a 64-bit integral type. (Since it is used in very + few places in Wget, this is acceptable.) */ + +#if SIZEOF_WGINT >= 8 +/* just use wgint */ +typedef wgint SUM_SIZE_INT; +#else +/* On systems without LFS, use double, which buys us integers up to 2^53. */ +typedef double SUM_SIZE_INT; +#endif + +#include "options.h" + +/* Everything uses this, so include them here directly. */ +#include <alloca.h> +#include "xalloc.h" + +/* Likewise for logging functions. */ +#include "log.h" + +/* Likewise for quoting functions. */ +#include "quote.h" +#include "quotearg.h" + +/* Likewise for struct iri definition */ +#include "iri.h" + +/* Useful macros used across the code: */ + +/* The number of elements in an array. For example: + static char a[] = "foo"; -- countof(a) == 4 (note terminating \0) + int a[5] = {1, 2}; -- countof(a) == 5 + char *a[] = { -- countof(a) == 3 + "foo", "bar", "baz" + }; */ +#define countof(array) (sizeof (array) / sizeof ((array)[0])) + +/* Zero out a value. */ +#define xzero(x) memset (&(x), '\0', sizeof (x)) + +/* Convert an ASCII hex digit to the corresponding number between 0 + and 15. H should be a hexadecimal digit that satisfies isxdigit; + otherwise, the result is undefined. */ +#define XDIGIT_TO_NUM(h) ((h) < 'A' ? (h) - '0' : c_toupper (h) - 'A' + 10) +#define X2DIGITS_TO_NUM(h1, h2) ((XDIGIT_TO_NUM (h1) << 4) + XDIGIT_TO_NUM (h2)) + +/* The reverse of the above: convert a number in the [0, 16) range to + the ASCII representation of the corresponding hexadecimal digit. + `+ 0' is there so you can't accidentally use it as an lvalue. */ +#define XNUM_TO_DIGIT(x) ("0123456789ABCDEF"[x] + 0) +#define XNUM_TO_digit(x) ("0123456789abcdef"[x] + 0) + +/* Copy the data delimited with BEG and END to alloca-allocated + storage, and zero-terminate it. Arguments are evaluated only once, + in the order BEG, END, PLACE. */ +#define BOUNDED_TO_ALLOCA(beg, end, place) do { \ + const char *BTA_beg = (beg); \ + int BTA_len = (end) - BTA_beg; \ + char **BTA_dest = &(place); \ + *BTA_dest = alloca (BTA_len + 1); \ + memcpy (*BTA_dest, BTA_beg, BTA_len); \ + (*BTA_dest)[BTA_len] = '\0'; \ +} while (0) + +/* Return non-zero if string bounded between BEG and END is equal to + STRING_LITERAL. The comparison is case-sensitive. */ +#define BOUNDED_EQUAL(beg, end, string_literal) \ + ((end) - (beg) == sizeof (string_literal) - 1 \ + && !memcmp (beg, string_literal, sizeof (string_literal) - 1)) + +/* The same as above, except the comparison is case-insensitive. */ +#define BOUNDED_EQUAL_NO_CASE(beg, end, string_literal) \ + ((end) - (beg) == sizeof (string_literal) - 1 \ + && !c_strncasecmp (beg, string_literal, sizeof (string_literal) - 1)) + +/* Like ptr=strdup(str), but allocates the space for PTR on the stack. + This cannot be an expression because this is not portable: + #define STRDUP_ALLOCA(str) (strcpy (alloca (strlen (str) + 1), str)) + The problem is that some compilers can't handle alloca() being an + argument to a function. */ + +#define STRDUP_ALLOCA(ptr, str) do { \ + char **SA_dest = &(ptr); \ + const char *SA_src = (str); \ + *SA_dest = (char *)alloca (strlen (SA_src) + 1); \ + strcpy (*SA_dest, SA_src); \ +} while (0) + +/* Generally useful if you want to avoid arbitrary size limits but + don't need a full dynamic array. Assumes that BASEVAR points to a + malloced array of TYPE objects (or possibly a NULL pointer, if + SIZEVAR is 0), with the total size stored in SIZEVAR. This macro + will realloc BASEVAR as necessary so that it can hold at least + NEEDED_SIZE objects. The reallocing is done by doubling, which + ensures constant amortized time per element. */ + +#define DO_REALLOC(basevar, sizevar, needed_size, type) do { \ + long DR_needed_size = (needed_size); \ + long DR_newsize = 0; \ + while ((sizevar) < (DR_needed_size)) { \ + DR_newsize = sizevar << 1; \ + if (DR_newsize < 16) \ + DR_newsize = 16; \ + (sizevar) = DR_newsize; \ + } \ + if (DR_newsize) \ + basevar = xrealloc (basevar, DR_newsize * sizeof (type)); \ +} while (0) + +/* Used to print pointers (usually for debugging). Print pointers + using printf ("0x%0*lx", PTR_FORMAT (p)). (%p is too unpredictable; + some implementations prepend 0x, while some don't, and most don't + 0-pad the address.) */ +#define PTR_FORMAT(p) (int) (2 * sizeof (void *)), (unsigned long) (p) + +/* Find the maximum buffer length needed to print an integer of type `x' + in base 10. 24082 / 10000 = 8*log_{10}(2). */ +#define MAX_INT_TO_STRING_LEN(x) ((sizeof(x) * 24082 / 10000) + 2) + +/* Find the minimum or maximum of two provided values */ +# define MIN(i, j) ((i) <= (j) ? (i) : (j)) +# define MAX(i, j) ((i) >= (j) ? (i) : (j)) + + +extern const char *exec_name; +extern const char *program_name; +extern const char *program_argstring; + +/* Document type ("dt") flags */ +enum +{ + TEXTHTML = 0x0001, /* document is of type text/html + or application/xhtml+xml */ + RETROKF = 0x0002, /* retrieval was OK */ + HEAD_ONLY = 0x0004, /* only send the HEAD request */ + SEND_NOCACHE = 0x0008, /* send Pragma: no-cache directive */ + ACCEPTRANGES = 0x0010, /* Accept-ranges header was found */ + ADDED_HTML_EXTENSION = 0x0020, /* added ".html" extension due to -E */ + TEXTCSS = 0x0040, /* document is of type text/css */ + IF_MODIFIED_SINCE = 0x0080, /* use if-modified-since header */ + METALINK_METADATA = 0x0100 /* use HTTP response for Metalink metadata */ +}; + +/* Universal error type -- used almost everywhere. Error reporting of + this detail is not generally used or needed and should be + simplified. */ +typedef enum +{ + NOCONERROR, HOSTERR, CONSOCKERR, CONERROR, CONSSLERR, + CONIMPOSSIBLE, NEWLOCATION, + FTPOK, FTPLOGINC, FTPLOGREFUSED, FTPPORTERR, FTPSYSERR, + FTPNSFOD, FTPUNKNOWNTYPE, FTPRERR, + FTPSRVERR, FTPRETRINT, FTPRESTFAIL, URLERROR, FOPENERR, + FOPEN_EXCL_ERR, FWRITEERR, HEOF, GATEWAYTIMEOUT, + HERR, RETROK, RECLEVELEXC, WRONGCODE, + FTPINVPASV, FTPNOPASV, FTPNOPBSZ, FTPNOPROT, FTPNOAUTH, + CONTNOTSUPPORTED, RETRUNNEEDED, RETRFINISHED, + READERR, TRYLIMEXC, FILEBADFILE, RANGEERR, + RETRBADPATTERN, PROXERR, + AUTHFAILED, QUOTEXC, WRITEFAILED, SSLINITFAILED, VERIFCERTERR, + UNLINKERR, NEWLOCATION_KEEP_POST, CLOSEFAILED, ATTRMISSING, UNKNOWNATTR, + WARC_ERR, WARC_TMP_FOPENERR, WARC_TMP_FWRITEERR, + TIMECONV_ERR, + METALINK_PARSE_ERROR, METALINK_RETR_ERROR, + METALINK_CHKSUM_ERROR, METALINK_SIG_ERROR, METALINK_MISSING_RESOURCE, + RETR_WITH_METALINK, + METALINK_SIZE_ERROR +} uerr_t; + +/* 2005-02-19 SMS. + Select an appropriate "orig" suffix and a separator character for + adding a unique suffix to a file name. + + A VMS ODS2 file system can't tolerate multiple dots. An ODS5 file + system can, but even there not all dots are equal, and heroic effort + would be needed to get ".html^.orig" rather than (the less desirable) + "^.html.orig". It's more satisfactory always to use "_orig" on VMS + (rather than including "vms.h", testing "ods5_dest", and acting + accordingly). + + Note that code in various places assumes that this string is five + characters long. +*/ +# ifdef __VMS +# define ORIG_SFX "_orig" +# else /* def __VMS */ +# define ORIG_SFX ".orig" +# endif /* def __VMS [else] */ + +/* ".NNN" unique-ifying suffix separator character for unique_name() in + url.c (and anywhere else). Note that on VMS, the file system's + version numbers solve the problem that unique_name() is designed to + handle, obviating this whole exercise. Other systems may specify a + character different from "." here, if desired. +*/ +# ifndef __VMS +# define UNIQ_SEP '.' +# endif /* ndef __VMS */ + +#if defined FUZZING && defined TESTING +/* Rename fopen so we can have our own version in fuzz/main.c to + not create random files. */ +# define fopen(fp, mode) fopen_wget(fp, mode) +# define exit(status) exit_wget(status) + +/* In run_wgetrc() we call fopen_wgetrc() instead of fopen, so we can catch + the call in our fuzzers. */ +FILE *fopen_wget(const char *pathname, const char *mode); +FILE *fopen_wgetrc(const char *pathname, const char *mode); +void exit_wget(int status); +#else +/* When not fuzzing, we want to call fopen() instead of fopen_wgetrc() */ +# define fopen_wgetrc(fp, mode) fopen(fp, mode) +#endif /* FUZZING && TESTING */ + +#endif /* WGET_H */ |