tour - touring some programming systems

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Commits per author per week (path 'js/games/nluqo.github.io/~bh/61a-pages/Volume1')

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/pre>bc0fa578 ^ 844a1701 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ bc0fa578 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ bc0fa578 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ bc0fa578 ^ bc0fa578 ^ e294ae26 ^ bc0fa578 ^ bc0fa578 ^ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 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1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 /* * $LynxId: HTFormat.c,v 1.85 2016/11/24 15:29:50 tom Exp $ * * Manage different file formats HTFormat.c * ============================= * * Bugs: * Not reentrant. * * Assumes the incoming stream is ASCII, rather than a local file * format, and so ALWAYS converts from ASCII on non-ASCII machines. * Therefore, non-ASCII machines can't read local files. * */ #define HTSTREAM_INTERNAL 1 #include <HTUtils.h> /* Implements: */ #include <HTFormat.h> static float HTMaxSecs = 1e10; /* No effective limit */ #ifdef UNIX #ifdef NeXT #define PRESENT_POSTSCRIPT "open %s; /bin/rm -f %s\n" #else #define PRESENT_POSTSCRIPT "(ghostview %s ; /bin/rm -f %s)&\n" /* Full pathname would be better! */ #endif /* NeXT */ #endif /* UNIX */ #include <HTML.h> #include <HTMLDTD.h> #include <HText.h> #include <HTAlert.h> #include <HTList.h> #include <HTInit.h> #include <HTTCP.h> #include <HTTP.h> /* Streams and structured streams which we use: */ #include <HTFWriter.h> #include <HTPlain.h> #include <SGML.h> #include <HTMLGen.h> #include <LYexit.h> #include <LYUtils.h> #include <GridText.h> #include <LYGlobalDefs.h> #include <LYLeaks.h> #ifdef DISP_PARTIAL #include <LYMainLoop.h> #endif BOOL HTOutputSource = NO; /* Flag: shortcut parser to stdout */ /* this version used by the NetToText stream */ struct _HTStream { const HTStreamClass *isa; BOOL had_cr; HTStream *sink; }; /* Presentation methods * -------------------- */ HTList *HTPresentations = NULL; HTPresentation *default_presentation = NULL; /* * To free off the presentation list. */ #ifdef LY_FIND_LEAKS static void HTFreePresentations(void); #endif /* Define a presentation system command for a content-type * ------------------------------------------------------- */ void HTSetPresentation(const char *representation, const char *command, const char *testcommand, double quality, double secs, double secs_per_byte, long int maxbytes, AcceptMedia media) { HTPresentation *pres = typecalloc(HTPresentation); if (pres == NULL) outofmem(__FILE__, "HTSetPresentation"); assert(representation != NULL); CTRACE2(TRACE_CFG, (tfp, "HTSetPresentation rep=%s, command=%s, test=%s, qual=%f\n", NonNull(representation), NonNull(command), NonNull(testcommand), quality)); pres->rep = HTAtom_for(representation); pres->rep_out = WWW_PRESENT; /* Fixed for now ... :-) */ pres->converter = HTSaveAndExecute; /* Fixed for now ... */ pres->quality = (float) quality; pres->secs = (float) secs; pres->secs_per_byte = (float) secs_per_byte; pres->maxbytes = maxbytes; pres->get_accept = 0; pres->accept_opt = media; pres->command = NULL; StrAllocCopy(pres->command, command); pres->testcommand = NULL; StrAllocCopy(pres->testcommand, testcommand); /* * Memory leak fixed. * 05-28-94 Lynx 2-3-1 Garrett Arch Blythe */ if (!HTPresentations) { HTPresentations = HTList_new(); #ifdef LY_FIND_LEAKS atexit(HTFreePresentations); #endif } if (strcmp(representation, "*") == 0) { FREE(default_presentation); default_presentation = pres; } else { HTList_addObject(HTPresentations, pres); } } /* Define a built-in function for a content-type * --------------------------------------------- */ void HTSetConversion(const char *representation_in, const char *representation_out, HTConverter *converter, double quality, double secs, double secs_per_byte, long int maxbytes, AcceptMedia media) { HTPresentation *pres = typecalloc(HTPresentation); if (pres == NULL) outofmem(__FILE__, "HTSetConversion"); CTRACE2(TRACE_CFG, (tfp, "HTSetConversion rep_in=%s, rep_out=%s, qual=%f\n", NonNull(representation_in), NonNull(representation_out), quality)); pres->rep = HTAtom_for(representation_in); pres->rep_out = HTAtom_for(representation_out); pres->converter = converter; pres->command = NULL; pres->testcommand = NULL; pres->quality = (float) quality; pres->secs = (float) secs; pres->secs_per_byte = (float) secs_per_byte; pres->maxbytes = maxbytes; pres->get_accept = TRUE; pres->accept_opt = media; /* * Memory Leak fixed. * 05-28-94 Lynx 2-3-1 Garrett Arch Blythe */ if (!HTPresentations) { HTPresentations = HTList_new(); #ifdef LY_FIND_LEAKS atexit(HTFreePresentations); #endif } HTList_addObject(HTPresentations, pres); } #ifdef LY_FIND_LEAKS /* * Purpose: Free the presentation list. * Arguments: void * Return Value: void * Remarks/Portability/Dependencies/Restrictions: * Made to clean up Lynx's bad leakage. * Revision History: * 05-28-94 created Lynx 2-3-1 Garrett Arch Blythe */ static void HTFreePresentations(void) { HTPresentation *pres = NULL; /* * Loop through the list. */ while (!HTList_isEmpty(HTPresentations)) { /* * Free off each item. May also need to free off it's items, but not * sure as of yet. */ pres = (HTPresentation *) HTList_removeLastObject(HTPresentations); FREE(pres->command); FREE(pres->testcommand); FREE(pres); } /* * Free the list itself. */ HTList_delete(HTPresentations); HTPresentations = NULL; } #endif /* LY_FIND_LEAKS */ /* File buffering * -------------- * * The input file is read using the macro which can read from * a socket or a file. * The input buffer size, if large will give greater efficiency and * release the server faster, and if small will save space on PCs etc. */ #define INPUT_BUFFER_SIZE 4096 /* Tradeoff */ static char input_buffer[INPUT_BUFFER_SIZE]; static char *input_pointer; static char *input_limit; static int input_file_number; /* Set up the buffering * * These routines are public because they are in fact needed by * many parsers, and on PCs and Macs we should not duplicate * the static buffer area. */ void HTInitInput(int file_number) { input_file_number = file_number; input_pointer = input_limit = input_buffer; } int interrupted_in_htgetcharacter = 0; int HTGetCharacter(void) { char ch; interrupted_in_htgetcharacter = 0; do { if (input_pointer >= input_limit) { int status = NETREAD(input_file_number, input_buffer, INPUT_BUFFER_SIZE); if (status <= 0) { if (status == 0) return EOF; if (status == HT_INTERRUPTED) { CTRACE((tfp, "HTFormat: Interrupted in HTGetCharacter\n")); interrupted_in_htgetcharacter = 1; return EOF; } CTRACE((tfp, "HTFormat: File read error %d\n", status)); return EOF; /* -1 is returned by UCX at end of HTTP link */ } input_pointer = input_buffer; input_limit = input_buffer + status; } ch = *input_pointer++; } while (ch == (char) 13); /* Ignore ASCII carriage return */ return FROMASCII(UCH(ch)); } #ifdef USE_SSL int HTGetSSLCharacter(void *handle) { char ch; interrupted_in_htgetcharacter = 0; if (!handle) return (char) EOF; do { if (input_pointer >= input_limit) { int status = SSL_read((SSL *) handle, input_buffer, INPUT_BUFFER_SIZE); if (status <= 0) { if (status == 0) return (char) EOF; if (status == HT_INTERRUPTED) { CTRACE((tfp, "HTFormat: Interrupted in HTGetSSLCharacter\n")); interrupted_in_htgetcharacter = 1; return (char) EOF; } CTRACE((tfp, "HTFormat: SSL_read error %d\n", status)); return (char) EOF; /* -1 is returned by UCX at end of HTTP link */ } input_pointer = input_buffer; input_limit = input_buffer + status; } ch = *input_pointer++; } while (ch == (char) 13); /* Ignore ASCII carriage return */ return FROMASCII(ch); } #endif /* USE_SSL */ /* Match maintype to any MIME type starting with maintype, for example: * image/gif should match image */ static int half_match(char *trial_type, char *target) { char *cp = StrChr(trial_type, '/'); /* if no '/' or no '*' */ if (!cp || *(cp + 1) != '*') return 0; CTRACE((tfp, "HTFormat: comparing %s and %s for half match\n", trial_type, target)); /* main type matches */ if (!StrNCmp(trial_type, target, ((cp - trial_type) - 1))) return 1; return 0; } /* * Evaluate a deferred mailcap test command, i.e.,. one that substitutes the * document's charset or other values in %{name} format. */ static BOOL failsMailcap(HTPresentation *pres, HTParentAnchor *anchor) { if (pres->testcommand != 0) { if (LYTestMailcapCommand(pres->testcommand, anchor->content_type_params) != 0) return TRUE; } return FALSE; } #define WWW_WILDCARD_REP_OUT HTAtom_for("*") /* Look up a presentation * ---------------------- * * If fill_in is NULL, only look for an exact match. * If a wildcard match is made, *fill_in is used to store * a possibly modified presentation, and a pointer to it is * returned. For an exact match, a pointer to the presentation * in the HTPresentations list is returned. Returns NULL if * nothing found. - kw * */ static HTPresentation *HTFindPresentation(HTFormat rep_in, HTFormat rep_out, HTPresentation *fill_in, HTParentAnchor *anchor) { HTAtom *wildcard = NULL; /* = HTAtom_for("*"); lookup when needed - kw */ int n; int i; HTPresentation *pres; HTPresentation *match; HTPresentation *strong_wildcard_match = 0; HTPresentation *weak_wildcard_match = 0; HTPresentation *last_default_match = 0; HTPresentation *strong_subtype_wildcard_match = 0; CTRACE((tfp, "HTFormat: Looking up presentation for %s to %s\n", HTAtom_name(rep_in), HTAtom_name(rep_out))); n = HTList_count(HTPresentations); for (i = 0; i < n; i++) { pres = (HTPresentation *) HTList_objectAt(HTPresentations, i); if (pres->rep == rep_in) { if (pres->rep_out == rep_out) { if (failsMailcap(pres, anchor)) continue; CTRACE((tfp, "FindPresentation: found exact match: %s -> %s\n", HTAtom_name(pres->rep), HTAtom_name(pres->rep_out))); return pres; } else if (!fill_in) { continue; } else { if (!wildcard) wildcard = WWW_WILDCARD_REP_OUT; if (pres->rep_out == wildcard) { if (failsMailcap(pres, anchor)) continue; if (!strong_wildcard_match) strong_wildcard_match = pres; /* otherwise use the first one */ CTRACE((tfp, "StreamStack: found strong wildcard match: %s -> %s\n", HTAtom_name(pres->rep), HTAtom_name(pres->rep_out))); } } } else if (!fill_in) { continue; } else if (half_match(HTAtom_name(pres->rep), HTAtom_name(rep_in))) { if (pres->rep_out == rep_out) { if (failsMailcap(pres, anchor)) continue; if (!strong_subtype_wildcard_match) strong_subtype_wildcard_match = pres; /* otherwise use the first one */ CTRACE((tfp, "StreamStack: found strong subtype wildcard match: %s -> %s\n", HTAtom_name(pres->rep), HTAtom_name(pres->rep_out))); } } if (pres->rep == WWW_SOURCE) { if (pres->rep_out == rep_out) { if (failsMailcap(pres, anchor)) continue; if (!weak_wildcard_match) weak_wildcard_match = pres; /* otherwise use the first one */ CTRACE((tfp, "StreamStack: found weak wildcard match: %s\n", HTAtom_name(pres->rep_out))); } else if (!last_default_match) { if (!wildcard) wildcard = WWW_WILDCARD_REP_OUT; if (pres->rep_out == wildcard) { if (failsMailcap(pres, anchor)) continue; last_default_match = pres; /* otherwise use the first one */ } } } } match = (strong_subtype_wildcard_match ? strong_subtype_wildcard_match : (strong_wildcard_match ? strong_wildcard_match : (weak_wildcard_match ? weak_wildcard_match : last_default_match))); if (match) { *fill_in = *match; /* Specific instance */ fill_in->rep = rep_in; /* yuk */ fill_in->rep_out = rep_out; /* yuk */ return fill_in; } return NULL; } /* Create a filter stack * --------------------- * * If a wildcard match is made, a temporary HTPresentation * structure is made to hold the destination format while the * new stack is generated. This is just to pass the out format to * MIME so far. Storing the format of a stream in the stream might * be a lot neater. * */ HTStream *HTStreamStack(HTFormat rep_in, HTFormat rep_out, HTStream *sink, HTParentAnchor *anchor) { HTPresentation temp; HTPresentation *match; HTStream *result; CTRACE((tfp, "StreamStack: Constructing stream stack for %s to %s (%s)\n", HTAtom_name(rep_in), HTAtom_name(rep_out), NONNULL(anchor->content_type_params))); if (rep_out == rep_in) { result = sink; } else if ((match = HTFindPresentation(rep_in, rep_out, &temp, anchor))) { if (match == &temp) { CTRACE((tfp, "StreamStack: Using %s\n", HTAtom_name(temp.rep_out))); } else { CTRACE((tfp, "StreamStack: found exact match: %s -> %s\n", HTAtom_name(match->rep), HTAtom_name(match->rep_out))); } result = (*match->converter) (match, anchor, sink); } else { result = NULL; } if (TRACE) { if (result && result->isa && result->isa->name) { CTRACE((tfp, "StreamStack: Returning \"%s\"\n", result->isa->name)); } else if (result) { CTRACE((tfp, "StreamStack: Returning *unknown* stream!\n")); } else { CTRACE((tfp, "StreamStack: Returning NULL!\n")); CTRACE_FLUSH(tfp); /* a crash may be imminent... - kw */ } } return result; } /* Put a presentation near start of list * ------------------------------------- * * Look up a presentation (exact match only) and, if found, reorder * it to the start of the HTPresentations list. - kw */ void HTReorderPresentation(HTFormat rep_in, HTFormat rep_out) { HTPresentation *match; if ((match = HTFindPresentation(rep_in, rep_out, NULL, NULL))) { HTList_removeObject(HTPresentations, match); HTList_addObject(HTPresentations, match); } } /* * Setup 'get_accept' flag to denote presentations that are not redundant, * and will be listed in "Accept:" header. */ void HTFilterPresentations(void) { int i, j; int n = HTList_count(HTPresentations); HTPresentation *p, *q; BOOL matched; char *s, *t; CTRACE((tfp, "HTFilterPresentations (AcceptMedia %#x)\n", LYAcceptMedia)); for (i = 0; i < n; i++) { p = (HTPresentation *) HTList_objectAt(HTPresentations, i); s = HTAtom_name(p->rep); p->get_accept = FALSE; if ((LYAcceptMedia & p->accept_opt) != 0 && p->rep_out == WWW_PRESENT && p->rep != WWW_SOURCE && strcasecomp(s, "www/mime") && strcasecomp(s, "www/compressed") && p->quality <= 1.0 && p->quality >= 0.0) { matched = TRUE; for (j = 0; j < i; j++) { q = (HTPresentation *) HTList_objectAt(HTPresentations, j); t = HTAtom_name(q->rep); if (!strcasecomp(s, t)) { matched = FALSE; CTRACE((tfp, " match %s %s\n", s, t)); break; } } p->get_accept = matched; } } } /* Find the cost of a filter stack * ------------------------------- * * Must return the cost of the same stack which StreamStack would set up. * * On entry, * length The size of the data to be converted */ float HTStackValue(HTFormat rep_in, HTFormat rep_out, double initial_value, long int length) { HTAtom *wildcard = WWW_WILDCARD_REP_OUT; CTRACE((tfp, "HTFormat: Evaluating stream stack for %s worth %.3f to %s\n", HTAtom_name(rep_in), initial_value, HTAtom_name(rep_out))); if (rep_out == WWW_SOURCE || rep_out == rep_in) return 0.0; { int n = HTList_count(HTPresentations); int i; HTPresentation *pres; for (i = 0; i < n; i++) { pres = (HTPresentation *) HTList_objectAt(HTPresentations, i); if (pres->rep == rep_in && (pres->rep_out == rep_out || pres->rep_out == wildcard)) { float value = (float) (initial_value * pres->quality); if (HTMaxSecs > 0.0) value = (value - ((float) length * pres->secs_per_byte + pres->secs) / HTMaxSecs); return value; } } } return (float) -1e30; /* Really bad */ } /* Display the page while transfer in progress * ------------------------------------------- * * Repaint the page only when necessary. * This is a traverse call for HText_pageDisplay() - it works!. * */ void HTDisplayPartial(void) { #ifdef DISP_PARTIAL if (display_partial) { /* * HText_getNumOfLines() = "current" number of complete lines received * NumOfLines_partial = number of lines at the moment of last repaint. * (we update NumOfLines_partial only when we repaint the display.) * * display_partial could only be enabled in HText_new() so a new * HTMainText object available - all HText_ functions use it, lines * counter HText_getNumOfLines() in particular. * * Otherwise HTMainText holds info from the previous document and we * may repaint it instead of the new one: prev doc scrolled to the * first line (=Newline_partial) is not good looking :-) 23 Aug 1998 * Leonid Pauzner * * So repaint the page only when necessary: */ int Newline_partial = LYGetNewline(); if (((Newline_partial + display_lines) - 1 > NumOfLines_partial) /* current page not complete... */ && (partial_threshold > 0 ? ((Newline_partial + partial_threshold) - 1 <= HText_getNumOfLines()) : ((Newline_partial + display_lines) - 1 <= HText_getNumOfLines())) /* * Originally we rendered by increments of 2 lines, * but that got annoying on slow network connections. * Then we switched to full-pages. Now it's configurable. * If partial_threshold <= 0, then it's a full page */ ) { if (LYMainLoop_pageDisplay(Newline_partial)) NumOfLines_partial = HText_getNumOfLines(); } } #else /* nothing */ #endif /* DISP_PARTIAL */ } /* Put this as early as possible, OK just after HTDisplayPartial() */ void HTFinishDisplayPartial(void) { #ifdef DISP_PARTIAL /* * End of incremental rendering stage here. */ display_partial = FALSE; #endif /* DISP_PARTIAL */ } /* Push data from a socket down a stream * ------------------------------------- * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. * * The file number given is assumed to be a TELNET stream, i.e., containing * CRLF at the end of lines which need to be stripped to LF for unix * when the format is textual. * * State of socket and target stream on entry: * socket (file_number) assumed open, * target (sink) assumed valid. * * Return values: * HT_INTERRUPTED Interruption or error after some data received. * -2 Unexpected disconnect before any data received. * -1 Interruption or error before any data received, or * (UNIX) other read error before any data received, or * download cancelled. * HT_LOADED Normal close of socket (end of file indication * received), or * unexpected disconnect after some data received, or * other read error after some data received, or * (not UNIX) other read error before any data received. * * State of socket and target stream on return depends on return value: * HT_INTERRUPTED socket still open, target aborted. * -2 socket still open, target stream still valid. * -1 socket still open, target aborted. * otherwise socket closed, target stream still valid. */ int HTCopy(HTParentAnchor *anchor, int file_number, void *handle GCC_UNUSED, HTStream *sink) { HTStreamClass targetClass; BOOL suppress_readprogress = NO; off_t limit = anchor ? anchor->content_length : 0; off_t bytes = anchor ? anchor->actual_length : 0; off_t total; int rv = 0; /* Push the data down the stream */ targetClass = *(sink->isa); /* Copy pointers to procedures */ /* * Push binary from socket down sink * * This operation could be put into a main event loop */ HTReadProgress(bytes, (off_t) 0); for (;;) { int status; if (LYCancelDownload) { LYCancelDownload = FALSE; (*targetClass._abort) (sink, NULL); rv = -1; goto finished; } if (HTCheckForInterrupt()) { _HTProgress(TRANSFER_INTERRUPTED); (*targetClass._abort) (sink, NULL); if (bytes) rv = HT_INTERRUPTED; else rv = -1; goto finished; } #ifdef USE_SSL if (handle) status = SSL_read((SSL *) handle, input_buffer, INPUT_BUFFER_SIZE); else status = NETREAD(file_number, input_buffer, INPUT_BUFFER_SIZE); #else status = NETREAD(file_number, input_buffer, INPUT_BUFFER_SIZE); #endif /* USE_SSL */ if (status <= 0) { if (status == 0) { break; } else if (status == HT_INTERRUPTED) { _HTProgress(TRANSFER_INTERRUPTED); (*targetClass._abort) (sink, NULL); if (bytes) rv = HT_INTERRUPTED; else rv = -1; goto finished; } else if (SOCKET_ERRNO == ENOTCONN || #ifdef _WINDOWS /* 1997/11/10 (Mon) 16:57:18 */ SOCKET_ERRNO == ETIMEDOUT || #endif SOCKET_ERRNO == ECONNRESET || SOCKET_ERRNO == EPIPE) { /* * Arrrrgh, HTTP 0/1 compatibility problem, maybe. */ if (bytes <= 0) { /* * Don't have any data, so let the calling function decide * what to do about it. - FM */ rv = -2; goto finished; } else { #ifdef UNIX /* * Treat what we've received already as the complete * transmission, but not without giving the user an alert. * I don't know about all the different TCP stacks for VMS * etc., so this is currently only for UNIX. - kw */ HTInetStatus("NETREAD"); HTAlert("Unexpected server disconnect."); CTRACE((tfp, "HTCopy: Unexpected server disconnect. Treating as completed.\n")); #else /* !UNIX */ /* * Treat what we've gotten already as the complete * transmission. - FM */ CTRACE((tfp, "HTCopy: Unexpected server disconnect. Treating as completed.\n")); status = 0; #endif /* UNIX */ } #ifdef UNIX } else { /* status < 0 and other errno */ /* * Treat what we've received already as the complete * transmission, but not without giving the user an alert. I * don't know about all the different TCP stacks for VMS etc., * so this is currently only for UNIX. - kw */ HTInetStatus("NETREAD"); HTAlert("Unexpected read error."); if (bytes) { (void) NETCLOSE(file_number); rv = HT_LOADED; } else { (*targetClass._abort) (sink, NULL); rv = -1; } goto finished; #endif } break; } /* * Suppress ReadProgress messages when collecting a redirection * message, at least initially (unless/until anchor->content_type gets * changed, probably by the MIME message parser). That way messages * put up by the HTTP module or elsewhere can linger in the statusline * for a while. - kw */ suppress_readprogress = (BOOL) (anchor && anchor->content_type && !strcmp(anchor->content_type, "message/x-http-redirection")); #ifdef NOT_ASCII { char *p; for (p = input_buffer; p < input_buffer + status; p++) { *p = FROMASCII(*p); } } #endif /* NOT_ASCII */ total = bytes + status; if (limit == 0 || bytes == 0 || (total < limit)) { (*targetClass.put_block) (sink, input_buffer, status); } else if (bytes < limit) { (*targetClass.put_block) (sink, input_buffer, (int) (limit - bytes)); } bytes = total; if (!suppress_readprogress) HTReadProgress(bytes, limit); HTDisplayPartial(); /* a few buggy implementations do not close the connection properly * and will hang if we try to read past the declared content-length. */ if (limit > 0 && bytes == limit) break; } /* next bufferload */ if (anchor != 0) { CTRACE((tfp, "HTCopy copied %" PRI_off_t " actual, %" PRI_off_t " limit\n", CAST_off_t (bytes), CAST_off_t (limit))); anchor->actual_length = bytes; } _HTProgress(TRANSFER_COMPLETE); (void) NETCLOSE(file_number); rv = HT_LOADED; finished: HTFinishDisplayPartial(); return (rv); } /* Push data from a file pointer down a stream * ------------------------------------- * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. * * * State of file and target stream on entry: * FILE* (fp) assumed open, * target (sink) assumed valid. * * Return values: * HT_INTERRUPTED Interruption after some data read. * HT_PARTIAL_CONTENT Error after some data read. * -1 Error before any data read. * HT_LOADED Normal end of file indication on reading. * * State of file and target stream on return: * always fp still open, target stream still valid. */ int HTFileCopy(FILE *fp, HTStream *sink) { HTStreamClass targetClass; int status; off_t bytes; int rv = HT_OK; /* Push the data down the stream */ targetClass = *(sink->isa); /* Copy pointers to procedures */ /* Push binary from socket down sink */ HTReadProgress(bytes = 0, (off_t) 0); for (;;) { status = (int) fread(input_buffer, (size_t) 1, (size_t) INPUT_BUFFER_SIZE, fp); if (status == 0) { /* EOF or error */ if (ferror(fp) == 0) { rv = HT_LOADED; break; } CTRACE((tfp, "HTFormat: Read error, read returns %d\n", ferror(fp))); if (bytes) { rv = HT_PARTIAL_CONTENT; } else { rv = -1; } break; } (*targetClass.put_block) (sink, input_buffer, status); bytes += status; HTReadProgress(bytes, (off_t) 0); /* Suppress last screen update in partial mode - a regular update under * control of mainloop() should follow anyway. - kw */ #ifdef DISP_PARTIAL if (display_partial && bytes != HTMainAnchor->content_length) HTDisplayPartial(); #endif if (HTCheckForInterrupt()) { _HTProgress(TRANSFER_INTERRUPTED); if (bytes) { rv = HT_INTERRUPTED; } else { rv = -1; } break; } } /* next bufferload */ HTFinishDisplayPartial(); return rv; } #ifdef USE_SOURCE_CACHE /* Push data from an HTChunk down a stream * --------------------------------------- * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. * * State of memory and target stream on entry: * HTChunk* (chunk) and target (sink) assumed valid. * * Return values: * HT_LOADED All data sent. * HT_INTERRUPTED Interruption after some data read. * * State of memory and target stream on return: * always chunk unchanged, target stream still valid. */ int HTMemCopy(HTChunk *chunk, HTStream *sink) { HTStreamClass targetClass; off_t bytes; int rv = HT_OK; targetClass = *(sink->isa); HTReadProgress(bytes = 0, (off_t) 0); for (; chunk != NULL; chunk = chunk->next) { /* Push the data down the stream a piece at a time, in case we're * running a large document on a slow machine. */ (*targetClass.put_block) (sink, chunk->data, chunk->size); bytes += chunk->size; HTReadProgress(bytes, (off_t) 0); HTDisplayPartial(); if (HTCheckForInterrupt()) { _HTProgress(TRANSFER_INTERRUPTED); if (bytes) { rv = HT_INTERRUPTED; } else { rv = -1; } break; } } HTFinishDisplayPartial(); return rv; } #endif #ifdef USE_ZLIB /* Push data from a gzip file pointer down a stream * ------------------------------------- * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. * * * State of file and target stream on entry: * gzFile (gzfp) assumed open (should have gzipped content), * target (sink) assumed valid. * * Return values: * HT_INTERRUPTED Interruption after some data read. * HT_PARTIAL_CONTENT Error after some data read. * -1 Error before any data read. * HT_LOADED Normal end of file indication on reading. * * State of file and target stream on return: * always gzfp still open, target stream still valid. */ static int HTGzFileCopy(gzFile gzfp, HTStream *sink) { HTStreamClass targetClass; int status; off_t bytes; int gzerrnum; int rv = HT_OK; /* Push the data down the stream */ targetClass = *(sink->isa); /* Copy pointers to procedures */ /* read and inflate gzip'd file, and push binary down sink */ HTReadProgress(bytes = 0, (off_t) 0); for (;;) { status = gzread(gzfp, input_buffer, INPUT_BUFFER_SIZE); if (status <= 0) { /* EOF or error */ if (status == 0) { rv = HT_LOADED; break; } CTRACE((tfp, "HTGzFileCopy: Read error, gzread returns %d\n", status)); CTRACE((tfp, "gzerror : %s\n", gzerror(gzfp, &gzerrnum))); if (TRACE) { if (gzerrnum == Z_ERRNO) perror("gzerror "); } if (bytes) { rv = HT_PARTIAL_CONTENT; } else { rv = -1; } break; } (*targetClass.put_block) (sink, input_buffer, status); bytes += status; HTReadProgress(bytes, (off_t) -1); HTDisplayPartial(); if (HTCheckForInterrupt()) { _HTProgress(TRANSFER_INTERRUPTED); rv = HT_INTERRUPTED; break; } } /* next bufferload */ HTFinishDisplayPartial(); return rv; } #ifndef HAVE_ZERROR #define zError(s) LynxZError(s) static const char *zError(int status) { static char result[80]; sprintf(result, "zlib error %d", status); return result; } #endif /* Push data from a deflate file pointer down a stream * ------------------------------------- * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. The code is * loosely based on the inflate.c file from w3m. * * * State of file and target stream on entry: * FILE (zzfp) assumed open (should have deflated content), * target (sink) assumed valid. * * Return values: * HT_INTERRUPTED Interruption after some data read. * HT_PARTIAL_CONTENT Error after some data read. * -1 Error before any data read. * HT_LOADED Normal end of file indication on reading. * * State of file and target stream on return: * always zzfp still open, target stream still valid. */ static int HTZzFileCopy(FILE *zzfp, HTStream *sink) { static char dummy_head[1 + 1] = { 0x8 + 0x7 * 0x10, (((0x8 + 0x7 * 0x10) * 0x100 + 30) / 31 * 31) & 0xFF, }; z_stream s; HTStreamClass targetClass; off_t bytes; int rv = HT_OK; char output_buffer[INPUT_BUFFER_SIZE]; int status; int flush; int retry = 0; int len = 0; /* Push the data down the stream */ targetClass = *(sink->isa); /* Copy pointers to procedures */ s.zalloc = Z_NULL; s.zfree = Z_NULL; s.opaque = Z_NULL; status = inflateInit(&s); if (status != Z_OK) { CTRACE((tfp, "HTZzFileCopy inflateInit() %s\n", zError(status))); exit_immediately(EXIT_FAILURE); } s.avail_in = 0; s.next_out = (Bytef *) output_buffer; s.avail_out = sizeof(output_buffer); flush = Z_NO_FLUSH; /* read and inflate deflate'd file, and push binary down sink */ HTReadProgress(bytes = 0, (off_t) 0); for (;;) { if (s.avail_in == 0) { s.next_in = (Bytef *) input_buffer; s.avail_in = (uInt) fread(input_buffer, (size_t) 1, (size_t) INPUT_BUFFER_SIZE, zzfp); len = (int) s.avail_in; } status = inflate(&s, flush); if (status == Z_STREAM_END || status == Z_BUF_ERROR) { len = (int) sizeof(output_buffer) - (int) s.avail_out; if (len > 0) { (*targetClass.put_block) (sink, output_buffer, len); bytes += len; HTReadProgress(bytes, (off_t) -1); HTDisplayPartial(); } rv = HT_LOADED; break; } else if (status == Z_DATA_ERROR && !retry++) { status = inflateReset(&s); if (status != Z_OK) { CTRACE((tfp, "HTZzFileCopy inflateReset() %s\n", zError(status))); rv = -1; break; } s.next_in = (Bytef *) dummy_head; s.avail_in = sizeof(dummy_head); (void) inflate(&s, flush); s.next_in = (Bytef *) input_buffer; s.avail_in = (unsigned) len; continue; } else if (status != Z_OK) { CTRACE((tfp, "HTZzFileCopy inflate() %s\n", zError(status))); rv = bytes ? HT_PARTIAL_CONTENT : -1; break; } else if (s.avail_out == 0) { len = sizeof(output_buffer); s.next_out = (Bytef *) output_buffer; s.avail_out = sizeof(output_buffer); (*targetClass.put_block) (sink, output_buffer, len); bytes += len; HTReadProgress(bytes, (off_t) -1); HTDisplayPartial(); if (HTCheckForInterrupt()) { _HTProgress(TRANSFER_INTERRUPTED); rv = bytes ? HT_INTERRUPTED : -1; break; } } retry = 1; } /* next bufferload */ inflateEnd(&s); HTFinishDisplayPartial(); return rv; } #endif /* USE_ZLIB */ #ifdef USE_BZLIB /* Push data from a bzip file pointer down a stream * ------------------------------------- * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. * * * State of file and target stream on entry: * BZFILE (bzfp) assumed open (should have bzipped content), * target (sink) assumed valid. * * Return values: * HT_INTERRUPTED Interruption after some data read. * HT_PARTIAL_CONTENT Error after some data read. * -1 Error before any data read. * HT_LOADED Normal end of file indication on reading. * * State of file and target stream on return: * always bzfp still open, target stream still valid. */ static int HTBzFileCopy(BZFILE * bzfp, HTStream *sink) { HTStreamClass targetClass; int status; off_t bytes; int bzerrnum; int rv = HT_OK; /* Push the data down the stream */ targetClass = *(sink->isa); /* Copy pointers to procedures */ /* read and inflate bzip'd file, and push binary down sink */ HTReadProgress(bytes = 0, (off_t) 0); for (;;) { status = BZ2_bzread(bzfp, input_buffer, INPUT_BUFFER_SIZE); if (status <= 0) { /* EOF or error */ if (status == 0) { rv = HT_LOADED; break; } CTRACE((tfp, "HTBzFileCopy: Read error, bzread returns %d\n", status)); CTRACE((tfp, "bzerror : %s\n", BZ2_bzerror(bzfp, &bzerrnum))); if (bytes) { rv = HT_PARTIAL_CONTENT; } else { rv = -1; } break; } (*targetClass.put_block) (sink, input_buffer, status); bytes += status; HTReadProgress(bytes, (off_t) -1); HTDisplayPartial(); if (HTCheckForInterrupt()) { _HTProgress(TRANSFER_INTERRUPTED); rv = HT_INTERRUPTED; break; } } /* next bufferload */ HTFinishDisplayPartial(); return rv; } #endif /* USE_BZLIB */ /* Push data from a socket down a stream STRIPPING CR * -------------------------------------------------- * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the socket. * * The file number given is assumed to be a TELNET stream ie containing * CRLF at the end of lines which need to be stripped to LF for unix * when the format is textual. * */ void HTCopyNoCR(HTParentAnchor *anchor GCC_UNUSED, int file_number, HTStream *sink) { HTStreamClass targetClass; int character; /* Push the data, ignoring CRLF, down the stream */ targetClass = *(sink->isa); /* Copy pointers to procedures */ /* * Push text from telnet socket down sink * * @@@@@ To push strings could be faster? (especially is we cheat and * don't ignore CR! :-} */ HTInitInput(file_number); for (;;) { character = HTGetCharacter(); if (character == EOF) break; (*targetClass.put_character) (sink, (char) character); } } /* Parse a socket given format and file number * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. * * The file number given is assumed to be a TELNET stream ie containing * CRLF at the end of lines which need to be stripped to LF for unix * when the format is textual. * * State of socket and target stream on entry: * socket (file_number) assumed open, * target (sink) usually NULL (will call stream stack). * * Return values: * HT_INTERRUPTED Interruption or error after some data received. * -501 Stream stack failed (cannot present or convert). * -2 Unexpected disconnect before any data received. * -1 Stream stack failed (cannot present or convert), or * Interruption or error before any data received, or * (UNIX) other read error before any data received, or * download cancelled. * HT_LOADED Normal close of socket (end of file indication * received), or * unexpected disconnect after some data received, or * other read error after some data received, or * (not UNIX) other read error before any data received. * * State of socket and target stream on return depends on return value: * HT_INTERRUPTED socket still open, target aborted. * -501 socket still open, target stream NULL. * -2 socket still open, target freed. * -1 socket still open, target stream aborted or NULL. * otherwise socket closed, target stream freed. */ int HTParseSocket(HTFormat rep_in, HTFormat format_out, HTParentAnchor *anchor, int file_number, HTStream *sink) { HTStream *stream; HTStreamClass targetClass; int rv; stream = HTStreamStack(rep_in, format_out, sink, anchor); if (!stream) { char *buffer = 0; if (LYCancelDownload) { LYCancelDownload = FALSE; return -1; } HTSprintf0(&buffer, CANNOT_CONVERT_I_TO_O, HTAtom_name(rep_in), HTAtom_name(format_out)); CTRACE((tfp, "HTFormat: %s\n", buffer)); rv = HTLoadError(sink, 501, buffer); /* returns -501 */ FREE(buffer); } else { /* * Push the data, don't worry about CRLF we can strip them later. */ targetClass = *(stream->isa); /* Copy pointers to procedures */ rv = HTCopy(anchor, file_number, NULL, stream); if (rv != -1 && rv != HT_INTERRUPTED) (*targetClass._free) (stream); } return rv; /* Originally: full: HT_LOADED; partial: HT_INTERRUPTED; no bytes: -1 */ } /* Parse a file given format and file pointer * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. * * The file number given is assumed to be a TELNET stream ie containing * CRLF at the end of lines which need to be stripped to \n for unix * when the format is textual. * * State of file and target stream on entry: * FILE* (fp) assumed open, * target (sink) usually NULL (will call stream stack). * * Return values: * -501 Stream stack failed (cannot present or convert). * -1 Download cancelled. * HT_NO_DATA Error before any data read. * HT_PARTIAL_CONTENT Interruption or error after some data read. * HT_LOADED Normal end of file indication on reading. * * State of file and target stream on return: * always fp still open; target freed, aborted, or NULL. */ int HTParseFile(HTFormat rep_in, HTFormat format_out, HTParentAnchor *anchor, FILE *fp, HTStream *sink) { HTStream *stream; HTStreamClass targetClass; int rv; int result; if (fp == NULL) { result = HT_LOADED; } else { stream = HTStreamStack(rep_in, format_out, sink, anchor); if (!stream || !stream->isa) { char *buffer = 0; if (LYCancelDownload) { LYCancelDownload = FALSE; result = -1; } else { HTSprintf0(&buffer, CANNOT_CONVERT_I_TO_O, HTAtom_name(rep_in), HTAtom_name(format_out)); CTRACE((tfp, "HTFormat(in HTParseFile): %s\n", buffer)); rv = HTLoadError(sink, 501, buffer); FREE(buffer); result = rv; } } else { /* * Push the data down the stream * * @@ Bug: This decision ought to be made based on "encoding" * rather than on content-type. @@@ When we handle encoding. The * current method smells anyway. */ targetClass = *(stream->isa); /* Copy pointers to procedures */ rv = HTFileCopy(fp, stream); if (rv == -1 || rv == HT_INTERRUPTED) { (*targetClass._abort) (stream, NULL); } else { (*targetClass._free) (stream); } if (rv == -1) { result = HT_NO_DATA; } else if (rv == HT_INTERRUPTED || (rv > 0 && rv != HT_LOADED)) { result = HT_PARTIAL_CONTENT; } else { result = HT_LOADED; } } } return result; } #ifdef USE_SOURCE_CACHE /* Parse a document in memory given format and memory block pointer * * This routine is responsible for creating and PRESENTING any * graphic (or other) objects described by the file. * * State of memory and target stream on entry: * HTChunk* (chunk) assumed valid, * target (sink) usually NULL (will call stream stack). * * Return values: * -501 Stream stack failed (cannot present or convert). * HT_LOADED All data sent. * * State of memory and target stream on return: * always chunk unchanged; target freed, aborted, or NULL. */ int HTParseMem(HTFormat rep_in, HTFormat format_out, HTParentAnchor *anchor, HTChunk *chunk, HTStream *sink) { HTStream *stream; HTStreamClass targetClass; int rv; int result; stream = HTStreamStack(rep_in, format_out, sink, anchor); if (!stream || !stream->isa) { char *buffer = 0; HTSprintf0(&buffer, CANNOT_CONVERT_I_TO_O, HTAtom_name(rep_in), HTAtom_name(format_out)); CTRACE((tfp, "HTFormat(in HTParseMem): %s\n", buffer)); rv = HTLoadError(sink, 501, buffer); FREE(buffer); result = rv; } else { /* Push the data down the stream */ targetClass = *(stream->isa); (void) HTMemCopy(chunk, stream); (*targetClass._free) (stream); result = HT_LOADED; } return result; } #endif #ifdef USE_ZLIB static int HTCloseGzFile(gzFile gzfp) { int gzres; if (gzfp == NULL) return 0; gzres = gzclose(gzfp); if (TRACE) { if (gzres == Z_ERRNO) { perror("gzclose "); } else if (gzres != Z_OK) { CTRACE((tfp, "gzclose : error number %d\n", gzres)); } } return (gzres); } /* HTParseGzFile * * State of file and target stream on entry: * gzFile (gzfp) assumed open, * target (sink) usually NULL (will call stream stack). * * Return values: * -501 Stream stack failed (cannot present or convert). * -1 Download cancelled. * HT_NO_DATA Error before any data read. * HT_PARTIAL_CONTENT Interruption or error after some data read. * HT_LOADED Normal end of file indication on reading. * * State of file and target stream on return: * always gzfp closed; target freed, aborted, or NULL. */ int HTParseGzFile(HTFormat rep_in, HTFormat format_out, HTParentAnchor *anchor, gzFile gzfp, HTStream *sink) { HTStream *stream; HTStreamClass targetClass; int rv; int result; stream = HTStreamStack(rep_in, format_out, sink, anchor); if (!stream || !stream->isa) { char *buffer = 0; HTCloseGzFile(gzfp); if (LYCancelDownload) { LYCancelDownload = FALSE; result = -1; } else { HTSprintf0(&buffer, CANNOT_CONVERT_I_TO_O, HTAtom_name(rep_in), HTAtom_name(format_out)); CTRACE((tfp, "HTFormat(in HTParseGzFile): %s\n", buffer)); rv = HTLoadError(sink, 501, buffer); FREE(buffer); result = rv; } } else { /* * Push the data down the stream * * @@ Bug: This decision ought to be made based on "encoding" rather than * on content-type. @@@ When we handle encoding. The current method * smells anyway. */ targetClass = *(stream->isa); /* Copy pointers to procedures */ rv = HTGzFileCopy(gzfp, stream); if (rv == -1 || rv == HT_INTERRUPTED) { (*targetClass._abort) (stream, NULL); } else { (*targetClass._free) (stream); } HTCloseGzFile(gzfp); if (rv == -1) { result = HT_NO_DATA; } else if (rv == HT_INTERRUPTED || (rv > 0 && rv != HT_LOADED)) { result = HT_PARTIAL_CONTENT; } else { result = HT_LOADED; } } return result; } /* HTParseZzFile * * State of file and target stream on entry: * FILE (zzfp) assumed open, * target (sink) usually NULL (will call stream stack). * * Return values: * -501 Stream stack failed (cannot present or convert). * -1 Download cancelled. * HT_NO_DATA Error before any data read. * HT_PARTIAL_CONTENT Interruption or error after some data read. * HT_LOADED Normal end of file indication on reading. * * State of file and target stream on return: * always zzfp closed; target freed, aborted, or NULL. */ int HTParseZzFile(HTFormat rep_in, HTFormat format_out, HTParentAnchor *anchor, FILE *zzfp, HTStream *sink) { HTStream *stream; HTStreamClass targetClass; int rv; int result; stream = HTStreamStack(rep_in, format_out, sink, anchor); if (!stream || !stream->isa) { char *buffer = 0; fclose(zzfp); if (LYCancelDownload) { LYCancelDownload = FALSE; result = -1; } else { HTSprintf0(&buffer, CANNOT_CONVERT_I_TO_O, HTAtom_name(rep_in), HTAtom_name(format_out)); CTRACE((tfp, "HTFormat(in HTParseGzFile): %s\n", buffer)); rv = HTLoadError(sink, 501, buffer); FREE(buffer); result = rv; } } else { /* * Push the data down the stream * * @@ Bug: This decision ought to be made based on "encoding" rather than * on content-type. @@@ When we handle encoding. The current method * smells anyway. */ targetClass = *(stream->isa); /* Copy pointers to procedures */ rv = HTZzFileCopy(zzfp, stream); if (rv == -1 || rv == HT_INTERRUPTED) { (*targetClass._abort) (stream, NULL); } else { (*targetClass._free) (stream); } fclose(zzfp); if (rv == -1) { result = HT_NO_DATA; } else if (rv == HT_INTERRUPTED || (rv > 0 && rv != HT_LOADED)) { result = HT_PARTIAL_CONTENT; } else { result = HT_LOADED; } } return result; } #endif /* USE_ZLIB */ #ifdef USE_BZLIB static void HTCloseBzFile(BZFILE * bzfp) { if (bzfp) BZ2_bzclose(bzfp); } /* HTParseBzFile * * State of file and target stream on entry: * bzFile (bzfp) assumed open, * target (sink) usually NULL (will call stream stack). * * Return values: * -501 Stream stack failed (cannot present or convert). * -1 Download cancelled. * HT_NO_DATA Error before any data read. * HT_PARTIAL_CONTENT Interruption or error after some data read. * HT_LOADED Normal end of file indication on reading. * * State of file and target stream on return: * always bzfp closed; target freed, aborted, or NULL. */ int HTParseBzFile(HTFormat rep_in, HTFormat format_out, HTParentAnchor *anchor, BZFILE * bzfp, HTStream *sink) { HTStream *stream; HTStreamClass targetClass; int rv; int result; stream = HTStreamStack(rep_in, format_out, sink, anchor); if (!stream || !stream->isa) { char *buffer = 0; HTCloseBzFile(bzfp); if (LYCancelDownload) { LYCancelDownload = FALSE; result = -1; } else { HTSprintf0(&buffer, CANNOT_CONVERT_I_TO_O, HTAtom_name(rep_in), HTAtom_name(format_out)); CTRACE((tfp, "HTFormat(in HTParseBzFile): %s\n", buffer)); rv = HTLoadError(sink, 501, buffer); FREE(buffer); result = rv; } } else { /* * Push the data down the stream * * @@ Bug: This decision ought to be made based on "encoding" rather than * on content-type. @@@ When we handle encoding. The current method * smells anyway. */ targetClass = *(stream->isa); /* Copy pointers to procedures */ rv = HTBzFileCopy(bzfp, stream); if (rv == -1 || rv == HT_INTERRUPTED) { (*targetClass._abort) (stream, NULL); } else { (*targetClass._free) (stream); } HTCloseBzFile(bzfp); if (rv == -1) { result = HT_NO_DATA; } else if (rv == HT_INTERRUPTED || (rv > 0 && rv != HT_LOADED)) { result = HT_PARTIAL_CONTENT; } else { result = HT_LOADED; } } return result; } #endif /* USE_BZLIB */ /* Converter stream: Network Telnet to internal character text * ----------------------------------------------------------- * * The input is assumed to be in ASCII, with lines delimited * by (13,10) pairs, These pairs are converted into (CR,LF) * pairs in the local representation. The (CR,LF) sequence * when found is changed to a '\n' character, the internal * C representation of a new line. */ static void NetToText_put_character(HTStream *me, int net_char) { char c = (char) FROMASCII(net_char); if (me->had_cr) { if (c == LF) { me->sink->isa->put_character(me->sink, '\n'); /* Newline */ me->had_cr = NO; return; } else { me->sink->isa->put_character(me->sink, CR); /* leftover */ } } me->had_cr = (BOOL) (c == CR); if (!me->had_cr) me->sink->isa->put_character(me->sink, c); /* normal */ } static void NetToText_put_string(HTStream *me, const char *s) { const char *p; for (p = s; *p; p++) NetToText_put_character(me, *p); } static void NetToText_put_block(HTStream *me, const char *s, int l) { const char *p; for (p = s; p < (s + l); p++) NetToText_put_character(me, *p); } static void NetToText_free(HTStream *me) { (me->sink->isa->_free) (me->sink); /* Close rest of pipe */ FREE(me); } static void NetToText_abort(HTStream *me, HTError e) { me->sink->isa->_abort(me->sink, e); /* Abort rest of pipe */ FREE(me); } /* The class structure */ static HTStreamClass NetToTextClass = { "NetToText", NetToText_free, NetToText_abort, NetToText_put_character, NetToText_put_string, NetToText_put_block }; /* The creation method */ HTStream *HTNetToText(HTStream *sink) { HTStream *me = typecalloc(HTStream); if (me == NULL) outofmem(__FILE__, "NetToText"); me->isa = &NetToTextClass; me->had_cr = NO; me->sink = sink; return me; } static HTStream HTBaseStreamInstance; /* Made static */ /* * ERROR STREAM * ------------ * There is only one error stream shared by anyone who wants a * generic error returned from all stream methods. */ static void HTErrorStream_put_character(HTStream *me GCC_UNUSED, int c GCC_UNUSED) { LYCancelDownload = TRUE; } static void HTErrorStream_put_string(HTStream *me GCC_UNUSED, const char *s) { if (s && *s) LYCancelDownload = TRUE; } static void HTErrorStream_write(HTStream *me GCC_UNUSED, const char *s, int l) { if (l && s) LYCancelDownload = TRUE; } static void HTErrorStream_free(HTStream *me GCC_UNUSED) { return; } static void HTErrorStream_abort(HTStream *me GCC_UNUSED, HTError e GCC_UNUSED) { return; } static const HTStreamClass HTErrorStreamClass = { "ErrorStream", HTErrorStream_free, HTErrorStream_abort, HTErrorStream_put_character, HTErrorStream_put_string, HTErrorStream_write }; HTStream *HTErrorStream(void) { CTRACE((tfp, "ErrorStream. Created\n")); HTBaseStreamInstance.isa = &HTErrorStreamClass; /* The rest is random */ return &HTBaseStreamInstance; } generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2025-06-01 04:21:20 +0000


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