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doc/yat2m.c
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NIIBE Yutaka
Fix use of noreturn.
16 сен 2022, 08:39
Не верифицирован
16 сен 2022, 08:39
000c50e
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/* yat2m.c - Yet Another Texi 2 Man converter * Copyright (C) 2005, 2013, 2015, 2016, 2017 g10 Code GmbH * Copyright (C) 2006, 2008, 2011 Free Software Foundation, Inc. * * This program 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. * * This program 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 this program; if not, see <https://www.gnu.org/licenses/>. */ /* This is a simple texinfo to man page converter. It needs some special markup in th e texinfo and tries best to get a create man page. It has been designed for the GnuPG man pages and thus only a few texinfo commands are supported. To use this you need to add the following macros into your texinfo source: @macro manpage {a} @end macro @macro mansect {a} @end macro @macro manpause @end macro @macro mancont @end macro They are used by yat2m to select parts of the Texinfo which should go into the man page. These macros need to be used without leading left space. Processing starts after a "manpage" macro has been seen. "mansect" identifies the section and yat2m make sure to emit the sections in the proper order. Note that @mansect skips the next input line if that line begins with @section, @subsection or @chapheading. To insert verbatim troff markup, the following texinfo code may be used: @ifset manverb .B whateever you want @end ifset alternatively a special comment may be used: @c man:.B whatever you want This is useful in case you need just one line. If you want to include parts only in the man page but keep the texinfo translation you may use: @ifset isman stuff to be rendered only on man pages @end ifset or to exclude stuff from man pages: @ifclear isman stuff not to be rendered on man pages @end ifclear the keyword @section is ignored, however @subsection gets rendered as ".SS". @menu is completely skipped. Several man pages may be extracted from one file, either using the --store or the --select option. If you want to indent tables in the source use this style: @table foo @item @item @table @item @end @end Don't change the indentation within a table and keep the same number of white space at the start of the line. yat2m simply detects the number of white spaces in front of an @item and remove this number of spaces from all following lines until a new @item is found or there are less spaces than for the last @item. Note that @* does only work correctly if used at the end of an input line. */ #include <stdio.h> #include <stdlib.h> #include <stddef.h> #include <string.h> #include <errno.h> #include <stdarg.h> #include <assert.h> #include <ctype.h> #include <time.h> #if __GNUC__ # define MY_GCC_VERSION (__GNUC__ * 10000 \ + __GNUC_MINOR__ * 100 \ + __GNUC_PATCHLEVEL__) #else # define MY_GCC_VERSION 0 #endif #if MY_GCC_VERSION >= 20500 # define ATTR_PRINTF(f, a) __attribute__ ((format(printf,f,a))) # define ATTR_NR_PRINTF(f, a) __attribute__ ((__noreturn__, format(printf,f,a))) #else # define ATTR_PRINTF(f, a) # define ATTR_NR_PRINTF(f, a) #endif #if MY_GCC_VERSION >= 30200 # define ATTR_MALLOC __attribute__ ((__malloc__)) #else # define ATTR_MALLOC #endif #define PGM "yat2m" #ifdef PACKAGE_VERSION # define VERSION PACKAGE_VERSION #else # define VERSION "1.0" #endif /* The maximum length of a line including the linefeed and one extra character. */ #define LINESIZE 1024 /* Number of allowed condition nestings. */ #define MAX_CONDITION_NESTING 10 static char const default_css[] = "<style type=\"text/css\">\n" " .y2m {\n" " font-family: monospace;\n" " }\n" " .y2m u {\n" " text-decoration: underline;\n" " }\n" " .y2m-sc {\n" " font-variant: small-caps;\n" " }\n" " .y2m li {\n" " margin-top: 1em;\n" " }\n" " .y2m-item {\n" " display: block;\n" " font-weight: bold;\n" " }\n" " .y2m-args {\n" " font-weight: normal;\n" " }\n" "</style>\n"; /* Option flags. */ static int verbose; static int quiet; static int debug; static int htmlmode; static const char *opt_source; static const char *opt_release; static const char *opt_date; static const char *opt_select; static const char *opt_include; static int opt_store; /* Flag to keep track whether any error occurred. */ static int any_error; /* Object to keep macro definitions. */ struct macro_s { struct macro_s *next; char *value; /* Malloced value. */ char name[1]; }; typedef struct macro_s *macro_t; /* List of all defined macros. */ static macro_t macrolist; /* List of variables set by @set. */ static macro_t variablelist; /* List of global macro names. The value part is not used. */ static macro_t predefinedmacrolist; /* Object to keep track of @isset and @ifclear. */ struct condition_s { int manverb; /* "manverb" needs special treatment. */ int isset; /* This is an @isset condition. */ char name[1]; /* Name of the condition macro. */ }; typedef struct condition_s *condition_t; /* The stack used to evaluate conditions. And the current states. */ static condition_t condition_stack[MAX_CONDITION_NESTING]; static int condition_stack_idx; static int cond_is_active; /* State of ifset/ifclear */ static int cond_in_verbatim; /* State of "manverb". */ /* Object to store one line of content. */ struct line_buffer_s { struct line_buffer_s *next; int verbatim; /* True if LINE contains verbatim data. The default is Texinfo source. */ char *line; }; typedef struct line_buffer_s *line_buffer_t; /* Object to collect the data of a section. */ struct section_buffer_s { char *name; /* Malloced name of the section. This may be NULL to indicate this slot is not used. */ line_buffer_t lines; /* Linked list with the lines of the section. */ line_buffer_t *lines_tail; /* Helper for faster appending to the linked list. */ line_buffer_t last_line; /* Points to the last line appended. */ }; typedef struct section_buffer_s *section_buffer_t; /* Variable to keep info about the current page together. */ static struct { /* Filename of the current page or NULL if no page is active. Malloced. */ char *name; /* Number of allocated elements in SECTIONS below. */ size_t n_sections; /* Array with the data of the sections. */ section_buffer_t sections; } thepage; /* The list of standard section names. COMMANDS and ASSUAN are GnuPG specific. */ static const char * const standard_sections[] = { "NAME", "SYNOPSIS", "DESCRIPTION", "RETURN VALUE", "EXIT STATUS", "ERROR HANDLING", "ERRORS", "COMMANDS", "OPTIONS", "USAGE", "EXAMPLES", "FILES", "ENVIRONMENT", "DIAGNOSTICS", "SECURITY", "CONFORMING TO", "ASSUAN", "NOTES", "BUGS", "AUTHOR", "SEE ALSO", NULL }; /*-- Local prototypes. --*/ static void proc_texi_buffer (FILE *fp, const char *line, size_t len, int *table_level, int *eol_action); static void die (const char *format, ...) ATTR_NR_PRINTF(1,2); static void err (const char *format, ...) ATTR_PRINTF(1,2); static void inf (const char *format, ...) ATTR_PRINTF(1,2); static void *xmalloc (size_t n) ATTR_MALLOC; static void *xcalloc (size_t n, size_t m) ATTR_MALLOC; /*-- Functions --*/ /* Print diagnostic message and exit with failure. */ static void die (const char *format, ...) { va_list arg_ptr; fflush (stdout); fprintf (stderr, "%s: ", PGM); va_start (arg_ptr, format); vfprintf (stderr, format, arg_ptr); va_end (arg_ptr); putc ('\n', stderr); exit (1); } /* Print diagnostic message. */ static void err (const char *format, ...) { va_list arg_ptr; fflush (stdout); if (strncmp (format, "%s:%d:", 6)) fprintf (stderr, "%s: ", PGM); va_start (arg_ptr, format); vfprintf (stderr, format, arg_ptr); va_end (arg_ptr); putc ('\n', stderr); any_error = 1; } /* Print diagnostic message. */ static void inf (const char *format, ...) { va_list arg_ptr; fflush (stdout); fprintf (stderr, "%s: ", PGM); va_start (arg_ptr, format); vfprintf (stderr, format, arg_ptr); va_end (arg_ptr); putc ('\n', stderr); } static void * xmalloc (size_t n) { void *p = malloc (n); if (!p) die ("out of core: %s", strerror (errno)); return p; } static void * xcalloc (size_t n, size_t m) { void *p = calloc (n, m); if (!p) die ("out of core: %s", strerror (errno)); return p; } static void * xrealloc (void *old, size_t n) { void *p = realloc (old, n); if (!p) die ("out of core: %s", strerror (errno)); return p; } static char * xstrdup (const char *string) { void *p = malloc (strlen (string)+1); if (!p) die ("out of core: %s", strerror (errno)); strcpy (p, string); return p; } /* Uppercase the ascii characters in STRING. */ static char * ascii_strupr (char *string) { char *p; for (p = string; *p; p++) if (!(*p & 0x80)) *p = toupper (*p); return string; } /* Return the current date as an ISO string. */ const char * isodatestring (void) { static char buffer[36]; struct tm *tp; time_t atime; if (opt_date && *opt_date) atime = strtoul (opt_date, NULL, 10); else atime = time (NULL); if (atime < 0) strcpy (buffer, "????" "-??" "-??"); else { tp = gmtime (&atime); sprintf (buffer,"%04d-%02d-%02d", 1900+tp->tm_year, tp->tm_mon+1, tp->tm_mday ); } return buffer; } /* Add NAME to the list of predefined macros which are global for all files. */ static void add_predefined_macro (const char *name) { macro_t m; for (m=predefinedmacrolist; m; m = m->next) if (!strcmp (m->name, name)) break; if (!m) { m = xcalloc (1, sizeof *m + strlen (name)); strcpy (m->name, name); m->next = predefinedmacrolist; predefinedmacrolist = m; } } /* Create or update a macro with name MACRONAME and set its values TO MACROVALUE. Note that ownership of the macro value is transferred to this function. */ static void set_macro (const char *macroname, char *macrovalue) { macro_t m; for (m=macrolist; m; m = m->next) if (!strcmp (m->name, macroname)) break; if (m) free (m->value); else { m = xcalloc (1, sizeof *m + strlen (macroname)); strcpy (m->name, macroname); m->next = macrolist; macrolist = m; } m->value = macrovalue; macrovalue = NULL; } /* Create or update a variable with name and value given in NAMEANDVALUE. */ static void set_variable (char *nameandvalue) { macro_t m; const char *value; char *p; for (p = nameandvalue; *p && *p != ' ' && *p != '\t'; p++) ; if (!*p) value = ""; else { *p++ = 0; while (*p == ' ' || *p == '\t') p++; value = p; } for (m=variablelist; m; m = m->next) if (!strcmp (m->name, nameandvalue)) break; if (m) free (m->value); else { m = xcalloc (1, sizeof *m + strlen (nameandvalue)); strcpy (m->name, nameandvalue); m->next = variablelist; variablelist = m; } m->value = xstrdup (value); } /* Return true if the macro or variable NAME is set, i.e. not the empty string and not evaluating to 0. */ static int macro_set_p (const char *name) { macro_t m; for (m = macrolist; m ; m = m->next) if (!strcmp (m->name, name)) break; if (!m) for (m = variablelist; m ; m = m->next) if (!strcmp (m->name, name)) break; if (!m || !m->value || !*m->value) return 0; if ((*m->value & 0x80) || !isdigit (*m->value)) return 1; /* Not a digit but some other string. */ return !!atoi (m->value); } /* Evaluate the current conditions. */ static void evaluate_conditions (const char *fname, int lnr) { int i; (void)fname; (void)lnr; /* for (i=0; i < condition_stack_idx; i++) */ /* inf ("%s:%d: stack[%d] %s %s %c", */ /* fname, lnr, i, condition_stack[i]->isset? "set":"clr", */ /* condition_stack[i]->name, */ /* (macro_set_p (condition_stack[i]->name) */ /* ^ !condition_stack[i]->isset)? 't':'f'); */ cond_is_active = 1; cond_in_verbatim = 0; if (condition_stack_idx) { for (i=0; i < condition_stack_idx; i++) { if (condition_stack[i]->manverb) cond_in_verbatim = (macro_set_p (condition_stack[i]->name) ^ !condition_stack[i]->isset); else if (!(macro_set_p (condition_stack[i]->name) ^ !condition_stack[i]->isset)) { cond_is_active = 0; break; } } } /* inf ("%s:%d: active=%d verbatim=%d", */ /* fname, lnr, cond_is_active, cond_in_verbatim); */ } /* Push a condition with condition macro NAME onto the stack. If ISSET is true, a @isset condition is pushed. */ static void push_condition (const char *name, int isset, const char *fname, int lnr) { condition_t cond; int manverb = 0; if (condition_stack_idx >= MAX_CONDITION_NESTING) { err ("%s:%d: condition nested too deep", fname, lnr); return; } if (!strcmp (name, "manverb")) { if (!isset) { err ("%s:%d: using \"@ifclear manverb\" is not allowed", fname, lnr); return; } manverb = 1; } cond = xcalloc (1, sizeof *cond + strlen (name)); cond->manverb = manverb; cond->isset = isset; strcpy (cond->name, name); condition_stack[condition_stack_idx++] = cond; evaluate_conditions (fname, lnr); } /* Remove the last condition from the stack. ISSET is used for error reporting. */ static void pop_condition (int isset, const char *fname, int lnr) { if (!condition_stack_idx) { err ("%s:%d: unbalanced \"@end %s\"", fname, lnr, isset?"isset":"isclear"); return; } condition_stack_idx--; free (condition_stack[condition_stack_idx]); condition_stack[condition_stack_idx] = NULL; evaluate_conditions (fname, lnr); } /* Return a section buffer for the section NAME. Allocate a new buffer if this is a new section. Keep track of the sections in THEPAGE. This function may reallocate the section array in THEPAGE. */ static section_buffer_t get_section_buffer (const char *name) { int i; section_buffer_t sect; /* If there is no section we put everything into the required NAME section. Given that this is the first one listed it is likely that error are easily visible. */ if (!name) name = "NAME"; for (i=0; i < thepage.n_sections; i++) { sect = thepage.sections + i; if (sect->name && !strcmp (name, sect->name)) return sect; } for (i=0; i < thepage.n_sections; i++) if (!thepage.sections[i].name) break; if (thepage.n_sections && i < thepage.n_sections) sect = thepage.sections + i; else { /* We need to allocate or reallocate the section array. */ size_t old_n = thepage.n_sections; size_t new_n = 20; if (!old_n) thepage.sections = xcalloc (new_n, sizeof *thepage.sections); else { thepage.sections = xrealloc (thepage.sections, ((old_n + new_n) * sizeof *thepage.sections)); memset (thepage.sections + old_n, 0, new_n * sizeof *thepage.sections); } thepage.n_sections += new_n; /* Setup the tail pointers. */ for (i=old_n; i < thepage.n_sections; i++) { sect = thepage.sections + i; sect->lines_tail = §->lines; } sect = thepage.sections + old_n; } /* Store the name. */ assert (!sect->name); sect->name = xstrdup (name); return sect; } /* Add the content of LINE to the section named SECTNAME. */ static void add_content (const char *sectname, char *line, int verbatim) { section_buffer_t sect; line_buffer_t lb; sect = get_section_buffer (sectname); if (sect->last_line && !sect->last_line->verbatim == !verbatim) { /* Lets append that line to the last one. We do this to keep all lines of the same kind (i.e.verbatim or not) together in one large buffer. */ size_t n1, n; lb = sect->last_line; n1 = strlen (lb->line); n = n1 + 1 + strlen (line) + 1; lb->line = xrealloc (lb->line, n); strcpy (lb->line+n1, "\n"); strcpy (lb->line+n1+1, line); } else { lb = xcalloc (1, sizeof *lb); lb->verbatim = verbatim; lb->line = xstrdup (line); sect->last_line = lb; *sect->lines_tail = lb; sect->lines_tail = &lb->next; } } /* Prepare for a new man page using the filename NAME. */ static void start_page (char *name) { if (verbose) inf ("starting page '%s'", name); assert (!thepage.name); thepage.name = xstrdup (name); thepage.n_sections = 0; } /* Write a character to FP. */ static void writechr (int c, FILE *fp) { putc (c, fp); } /* Write depending on HTMLMODE either ROFF or HTML to FP. */ static void writestr (const char *roff, const char *html, FILE *fp) { const char *s = htmlmode? html : roff; if (s) fputs (s, fp); } /* Write the .TH entry of the current page. Return -1 if there is a problem with the page. */ static int write_th (FILE *fp) { char *name, *p; writestr (".\\\" Created from Texinfo source by yat2m " VERSION "\n", "<!-- Created from Texinfo source by yat2m " VERSION " -->\n", fp); name = ascii_strupr (xstrdup (thepage.name)); p = strrchr (name, '.'); if (!p || !p[1]) { err ("no section name in man page '%s'", thepage.name); free (name); return -1; } *p++ = 0; if (htmlmode) { fputs ("<html>\n" "<head>\n", fp); fprintf (fp, " <title>%s(%s)</title>\n", name, p); fputs (default_css, fp); fputs ("</head>\n" "<body>\n", fp); fputs ("<div class=\"y2m\">\n", fp); } /* This roff source * .TH GPG 1 2016-12-20 "GnuPG 2.1.17" "GNU Privacy Guard 2.1" * is rendered by man like this: * GPG(1) GNU Privacy Guard 2.1 GPG(1) * [...] * GnuPG 2.1.17 2016-12-20 GPG(1) */ if (htmlmode) { fprintf (fp, "<p class=\"y2m y2m-top\">" "<span class=\"y2m-left\">%s(%s)</span> " "<span class=\"y2m-center\">%s</span> " "<span class=\"y2m-right\">%s(%s)</span>" "</p>\n", name, p, opt_source, name, p); /* Note that the HTML footer is written by write_bottom(). */ } else fprintf (fp, ".TH %s %s %s \"%s\" \"%s\"\n", name, p, isodatestring (), opt_release, opt_source); free (name); return 0; } /* In HTML mode we need to render a footer. */ static int write_bottom (FILE *fp) { char *name, *p; if (!htmlmode) return 0; name = ascii_strupr (xstrdup (thepage.name)); p = strrchr (name, '.'); if (!p || !p[1]) { err ("no section name in man page '%s'", thepage.name); free (name); return -1; } *p++ = 0; /* This roff source * .TH GPG 1 2016-12-20 "GnuPG 2.1.17" "GNU Privacy Guard 2.1" * is rendered by man to this footer: * GnuPG 2.1.17 2016-12-20 GPG(1) */ fprintf (fp, "<p class=\"y2m y2m-footer\">" "<span class=\"y2m-left\">%s</span> " "<span class=\"y2m-center\">%s</span> " "<span class=\"y2m-right\">%s(%s)</span>" "</p>\n", opt_release, isodatestring (), name, p); fputs ("</div><!-- class y2m -->\n", fp); fputs ("</body>\n" "</html>\n", fp); free (name); return 0; } /* Write the .SH header. With NULL passed for NAME just close a * section in html mode if there is an open section. */ static void write_sh (FILE *fp, const char *name) { static int in_section; if (htmlmode && in_section) fprintf (fp, "</div>\n"); in_section = 0; if (name) { if (htmlmode) fprintf (fp, "<div class=\"y2m-section\">\n" "<p class=\"y2m-sh\">%s</p>\n", name); else fprintf (fp, ".SH %s\n", name); in_section = 1; } } /* Render a @item line to HTML. (LINE,LEN) gives the arguments of * @item. Use NULL for LINE to close a possible open <li>. ITEMX * flags a @itemx line. */ static void write_html_item (FILE *fp, const char *line, size_t len, int itemx) { static int in_li; const char *rest; size_t n, n0; int eol_action = 0; int table_level = 0; if (!itemx && in_li) { fprintf (fp, "</li>\n"); in_li = 0; } if (line) { /* Trim the LF and skip leading spaces. */ if (len && line[len-1] == '\n') len--; for (; len && (*line == ' ' || *line == '\t'); len--, line++) ; if (len) { rest = line; for (n=0; n < len && !(*rest == ' ' || *rest == '\t'); n++, rest++) ; n0 = n; for (; n < len && (*rest == ' ' || *rest == '\t'); n++, rest++) ; len -= n; /* Now the first word is (LINE,N0) and the args are (REST,LEN) */ fprintf (fp, "%s<span class=\"y2m-item\">%.*s", itemx? " ":"<li>", (int)n0, line); if (len) { fputs (" <span class=\"y2m-args\">", fp); proc_texi_buffer (fp, rest, len, &table_level, &eol_action); fputs ("</span>", fp); } fputs ("</span>\n", fp); in_li = 1; } } } /* Process the texinfo command COMMAND (without the leading @) and write output if needed to FP. REST is the remainder of the line which should either point to an opening brace or to a white space. The function returns the number of characters already processed from REST. LEN is the usable length of REST. TABLE_LEVEL is used to control the indentation of tables. */ static size_t proc_texi_cmd (FILE *fp, const char *command, const char *rest, size_t len, int *table_level, int *eol_action) { static struct { const char *name; /* Name of the command. */ int what; /* What to do with this command. */ const char *lead_in; /* String to print with a opening brace. */ const char *lead_out;/* String to print with the closing brace. */ const char *html_in; /* Same as LEAD_IN but for HTML. */ const char *html_out;/* Same as LEAD_OUT but for HTML. */ } cmdtbl[] = { { "command", 0, "\\fB", "\\fR", "<i>", "</i>" }, { "code", 0, "\\fB", "\\fR", "<samp>", "</samp>" }, { "url", 0, "\\fB", "\\fR", "<strong>", "</strong>" }, { "sc", 0, "\\fB", "\\fR", "<span class=\"y2m-sc\">", "</span>" }, { "var", 0, "\\fI", "\\fR", "<u>", "</u>" }, { "samp", 0, "\\(oq", "\\(cq" }, { "kbd", 0, "\\(oq", "\\(cq" }, { "file", 0, "\\(oq\\fI","\\fR\\(cq" }, { "env", 0, "\\(oq\\fI","\\fR\\(cq" }, { "acronym", 0 }, { "dfn", 0 }, { "option", 0, "\\fB", "\\fR", "<samp>", "</samp>" }, { "example", 1, ".RS 2\n.nf\n", NULL, "\n<pre>\n", "\n</pre>\n" }, { "smallexample", 1, ".RS 2\n.nf\n", NULL, "\n<pre>\n", "\n</pre>\n" }, { "asis", 7 }, { "anchor", 7 }, { "cartouche", 1 }, { "ref", 0, "[", "]" }, { "xref", 0, "See: [", "]" }, { "pxref", 0, "see: [", "]" }, { "uref", 0, "(\\fB", "\\fR)" }, { "footnote",0, " ([", "])" }, { "emph", 0, "\\fI", "\\fR", "<em>", "</em>" }, { "w", 1 }, { "c", 5 }, { "efindex", 1 }, { "opindex", 1 }, { "cpindex", 1 }, { "cindex", 1 }, { "noindent", 0 }, { "section", 1 }, { "chapter", 1 }, { "subsection", 6, "\n.SS " }, { "chapheading", 0}, { "item", 2, ".TP\n.B " }, { "itemx", 2, ".TQ\n.B " }, { "table", 3, NULL, NULL, "<ul>\n", "</ul>\n" }, { "itemize", 3 }, { "bullet", 0, "* " }, { "*", 0, "\n.br"}, { "/", 0 }, { "end", 4 }, { "quotation",1, ".RS\n\\fB" }, { "value", 8 }, { NULL } }; size_t n; int i; const char *s; const char *lead_out = NULL; const char *html_out = NULL; int ignore_args = 0; for (i=0; cmdtbl[i].name && strcmp (cmdtbl[i].name, command); i++) ; if (cmdtbl[i].name) { writestr (cmdtbl[i].lead_in, cmdtbl[i].html_in, fp); lead_out = cmdtbl[i].lead_out; html_out = cmdtbl[i].html_out; switch (cmdtbl[i].what) { case 1: /* Throw away the entire line. */ s = memchr (rest, '\n', len); return s? (s-rest)+1 : len; case 2: /* Handle @item. */ if (htmlmode) { s = memchr (rest, '\n', len); n = s? (s-rest)+1 : len; write_html_item (fp, rest, n, !strcmp(cmdtbl[i].name, "itemx")); return n; } break; case 3: /* Handle table. */ if (++(*table_level) > 1) { write_html_item (fp, NULL, 0, 0); writestr (".RS\n", "<ul>\n", fp); } /* Now throw away the entire line. */ s = memchr (rest, '\n', len); return s? (s-rest)+1 : len; break; case 4: /* Handle end. */ for (s=rest, n=len; n && (*s == ' ' || *s == '\t'); s++, n--) ; if (n >= 5 && !memcmp (s, "table", 5) && (!n || s[5] == ' ' || s[5] == '\t' || s[5] == '\n')) { if (htmlmode) write_html_item (fp, NULL, 0, 0); if ((*table_level)-- > 1) writestr (".RE\n", "</ul>\n", fp); else writestr (".P\n", "</ul>\n", fp); } else if (n >= 7 && !memcmp (s, "example", 7) && (!n || s[7] == ' ' || s[7] == '\t' || s[7] == '\n')) { writestr (".fi\n.RE\n", "</pre>\n", fp); } else if (n >= 12 && !memcmp (s, "smallexample", 12) && (!n || s[12] == ' ' || s[12] == '\t' || s[12] == '\n')) { writestr (".fi\n.RE\n", "</pre>\n", fp); } else if (n >= 9 && !memcmp (s, "quotation", 9) && (!n || s[9] == ' ' || s[9] == '\t' || s[9] == '\n')) { writestr ("\\fR\n.RE\n", "xx", fp); } /* Now throw away the entire line. */ s = memchr (rest, '\n', len); return s? (s-rest)+1 : len; case 5: /* Handle special comments. */ for (s=rest, n=len; n && (*s == ' ' || *s == '\t'); s++, n--) ; if (n >= 4 && !memcmp (s, "man:", 4)) { s += 4; n -= 4; if (htmlmode) { if (!strncmp (s, ".RE\n", 4) || !strncmp (s, ".RS\n", 4)) ; else inf ("unknown special comment \"man:\""); } else { for (; n && *s != '\n'; n--, s++) writechr (*s, fp); writechr ('\n', fp); } } /* Now throw away the entire line. */ s = memchr (rest, '\n', len); return s? (s-rest)+1 : len; case 6: *eol_action = 1; break; case 7: ignore_args = 1; break; case 8: ignore_args = 1; if (*rest != '{') { err ("opening brace for command '%s' missing", command); return len; } else { /* Find closing brace. */ for (s=rest+1, n=1; *s && n < len; s++, n++) if (*s == '}') break; if (*s != '}') { err ("closing brace for command '%s' not found", command); return len; } else { size_t rlen = s - (rest + 1); macro_t m; for (m = variablelist; m; m = m->next) { if (strlen (m->name) == rlen && !strncmp (m->name, rest+1, rlen)) break; } if (m) writestr (m->value, m->value, fp); else inf ("texinfo variable '%.*s' is not set", (int)rlen, rest+1); } } break; default: break; } } else /* macro */ { macro_t m; for (m = macrolist; m ; m = m->next) if (!strcmp (m->name, command)) break; if (m) { proc_texi_buffer (fp, m->value, strlen (m->value), table_level, eol_action); ignore_args = 1; /* Parameterized macros are not yet supported. */ } else inf ("texinfo command '%s' not supported (%.*s)", command, (int)((s = memchr (rest, '\n', len)), (s? (s-rest) : len)), rest); } if (*rest == '{') { /* Find matching closing brace. */ for (s=rest+1, n=1, i=1; i && *s && n < len; s++, n++) if (*s == '{') i++; else if (*s == '}') i--; if (i) { err ("closing brace for command '%s' not found", command); return len; } if (n > 2 && !ignore_args) proc_texi_buffer (fp, rest+1, n-2, table_level, eol_action); } else n = 0; writestr (lead_out, html_out, fp); return n; } /* Process the string LINE with LEN bytes of Texinfo content. */ static void proc_texi_buffer (FILE *fp, const char *line, size_t len, int *table_level, int *eol_action) { const char *s; char cmdbuf[256]; int cmdidx = 0; int in_cmd = 0; size_t n; for (s=line; *s && len; s++, len--) { if (in_cmd) { if (in_cmd == 1) { switch (*s) { case '@': case '{': case '}': writechr (*s, fp); in_cmd = 0; break; case ':': /* Not ending a sentence flag. */ in_cmd = 0; break; case '.': case '!': case '?': /* Ending a sentence. */ writechr (*s, fp); in_cmd = 0; break; case ' ': case '\t': case '\n': /* Non collapsing spaces. */ writechr (*s, fp); in_cmd = 0; break; default: cmdidx = 0; cmdbuf[cmdidx++] = *s; in_cmd++; break; } } else if (*s == '{' || *s == ' ' || *s == '\t' || *s == '\n') { cmdbuf[cmdidx] = 0; n = proc_texi_cmd (fp, cmdbuf, s, len, table_level, eol_action); assert (n <= len); s += n; len -= n; s--; len++; in_cmd = 0; } else if (cmdidx < sizeof cmdbuf -1) cmdbuf[cmdidx++] = *s; else { err ("texinfo command too long - ignored"); in_cmd = 0; } } else if (*s == '@') in_cmd = 1; else if (*s == '\n') { switch (*eol_action) { case 1: /* Create a dummy paragraph. */ writestr ("\n\\ \n", "\n<-- dummy par -->\n", fp); break; default: writechr (*s, fp); } *eol_action = 0; } else if (*s == '\\') writestr ("\\\\", "\\\\", fp); else writechr (*s, fp); } if (in_cmd > 1) { cmdbuf[cmdidx] = 0; n = proc_texi_cmd (fp, cmdbuf, s, len, table_level, eol_action); assert (n <= len); s += n; len -= n; s--; len++; /* in_cmd = 0; -- doc only */ } } /* Do something with the Texinfo line LINE. */ static void parse_texi_line (FILE *fp, const char *line, int *table_level) { int eol_action = 0; /* A quick test whether there are any texinfo commands. */ if (!strchr (line, '@')) { /* FIXME: In html mode escape HTML stuff. */ writestr (line, line, fp); writechr ('\n', fp); return; } proc_texi_buffer (fp, line, strlen (line), table_level, &eol_action); writechr ('\n', fp); } /* Write all the lines LINES to FP. */ static void write_content (FILE *fp, line_buffer_t lines) { line_buffer_t line; int table_level = 0; for (line = lines; line; line = line->next) { if (line->verbatim) { /* FIXME: IN HTML mode we need to employ a parser for roff * markup. */ writestr (line->line, line->line, fp); writechr ('\n', fp); } else { /* fputs ("TEXI---", fp); */ /* fputs (line->line, fp); */ /* fputs ("---\n", fp); */ parse_texi_line (fp, line->line, &table_level); } } } static int is_standard_section (const char *name) { int i; const char *s; for (i=0; (s=standard_sections[i]); i++) if (!strcmp (s, name)) return 1; return 0; } /* Finish a page; that is sort the data and write it out to the file. */ static void finish_page (void) { FILE *fp; section_buffer_t sect = NULL; int idx; const char *s; int i; if (!thepage.name) return; /* No page active. */ if (verbose) inf ("finishing page '%s'", thepage.name); if (opt_select) { if (!strcmp (opt_select, thepage.name)) { inf ("selected '%s'", thepage.name ); fp = stdout; } else { fp = fopen ( "/dev/null", "w" ); if (!fp) die ("failed to open /dev/null: %s\n", strerror (errno)); } } else if (opt_store) { if (verbose) inf ("writing '%s'", thepage.name ); fp = fopen ( thepage.name, "w" ); if (!fp) die ("failed to create '%s': %s\n", thepage.name, strerror (errno)); } else fp = stdout; if (write_th (fp)) goto leave; for (idx=0; (s=standard_sections[idx]); idx++) { for (i=0; i < thepage.n_sections; i++) { sect = thepage.sections + i; if (sect->name && !strcmp (s, sect->name)) break; } if (i == thepage.n_sections) sect = NULL; if (sect) { write_sh (fp, sect->name); write_content (fp, sect->lines); /* Now continue with all non standard sections directly following this one. */ for (i++; i < thepage.n_sections; i++) { sect = thepage.sections + i; if (sect->name && is_standard_section (sect->name)) break; if (sect->name) { write_sh (fp, sect->name); write_content (fp, sect->lines); } } } } write_sh (fp, NULL); if (write_bottom (fp)) goto leave; leave: if (fp != stdout) fclose (fp); free (thepage.name); thepage.name = NULL; /* FIXME: Cleanup the content. */ } /* Parse one Texinfo file and create manpages according to the embedded instructions. */ static void parse_file (const char *fname, FILE *fp, char **section_name, int in_pause) { char *line; int lnr = 0; /* Fixme: The following state variables don't carry over to include files. */ int skip_to_end = 0; /* Used to skip over menu entries. */ int skip_sect_line = 0; /* Skip after @mansect. */ int item_indent = 0; /* How far is the current @item indented. */ /* Helper to define a macro. */ char *macroname = NULL; char *macrovalue = NULL; size_t macrovaluesize = 0; size_t macrovalueused = 0; line = xmalloc (LINESIZE); while (fgets (line, LINESIZE, fp)) { size_t n = strlen (line); int got_line = 0; char *p, *pend; lnr++; if (!n || line[n-1] != '\n') { err ("%s:%d: trailing linefeed missing, line too long or " "embedded Nul character", fname, lnr); break; } line[--n] = 0; /* Kludge to allow indentation of tables. */ for (p=line; *p == ' ' || *p == '\t'; p++) ; if (*p) { if (*p == '@' && !strncmp (p+1, "item", 4)) item_indent = p - line; /* Set a new indent level. */ else if (p - line < item_indent) item_indent = 0; /* Switch off indention. */ if (item_indent) { memmove (line, line+item_indent, n - item_indent + 1); n -= item_indent; } } if (*line == '@') { for (p=line+1, n=1; *p && *p != ' ' && *p != '\t'; p++) n++; while (*p == ' ' || *p == '\t') p++; } else p = line; /* Take action on macro. */ if (macroname) { if (n == 4 && !memcmp (line, "@end", 4) && (line[4]==' '||line[4]=='\t'||!line[4]) && !strncmp (p, "macro", 5) && (p[5]==' '||p[5]=='\t'||!p[5])) { if (macrovalueused) macrovalue[--macrovalueused] = 0; /* Kill the last LF. */ macrovalue[macrovalueused] = 0; /* Terminate macro. */ macrovalue = xrealloc (macrovalue, macrovalueused+1); set_macro (macroname, macrovalue); macrovalue = NULL; free (macroname); macroname = NULL; } else { if (macrovalueused + strlen (line) + 2 >= macrovaluesize) { macrovaluesize += strlen (line) + 256; macrovalue = xrealloc (macrovalue, macrovaluesize); } strcpy (macrovalue+macrovalueused, line); macrovalueused += strlen (line); macrovalue[macrovalueused++] = '\n'; } continue; } if (n >= 5 && !memcmp (line, "@node", 5) && (line[5]==' '||line[5]=='\t'||!line[5])) { /* Completey ignore @node lines. */ continue; } if (skip_sect_line) { skip_sect_line = 0; if (!strncmp (line, "@section", 8) || !strncmp (line, "@subsection", 11) || !strncmp (line, "@chapheading", 12)) continue; } /* We only parse lines we need and ignore the rest. There are a few macros used to control this as well as one @ifset command. Parts we know about are saved away into containers separate for each section. */ /* First process ifset/ifclear commands. */ if (*line == '@') { if (n == 6 && !memcmp (line, "@ifset", 6) && (line[6]==' '||line[6]=='\t')) { for (p=line+7; *p == ' ' || *p == '\t'; p++) ; if (!*p) { err ("%s:%d: name missing after \"@ifset\"", fname, lnr); continue; } for (pend=p; *pend && *pend != ' ' && *pend != '\t'; pend++) ; *pend = 0; /* Ignore rest of the line. */ push_condition (p, 1, fname, lnr); continue; } else if (n == 8 && !memcmp (line, "@ifclear", 8) && (line[8]==' '||line[8]=='\t')) { for (p=line+9; *p == ' ' || *p == '\t'; p++) ; if (!*p) { err ("%s:%d: name missing after \"@ifsclear\"", fname, lnr); continue; } for (pend=p; *pend && *pend != ' ' && *pend != '\t'; pend++) ; *pend = 0; /* Ignore rest of the line. */ push_condition (p, 0, fname, lnr); continue; } else if (n == 4 && !memcmp (line, "@end", 4) && (line[4]==' '||line[4]=='\t') && !strncmp (p, "ifset", 5) && (p[5]==' '||p[5]=='\t'||!p[5])) { pop_condition (1, fname, lnr); continue; } else if (n == 4 && !memcmp (line, "@end", 4) && (line[4]==' '||line[4]=='\t') && !strncmp (p, "ifclear", 7) && (p[7]==' '||p[7]=='\t'||!p[7])) { pop_condition (0, fname, lnr); continue; } } /* Take action on ifset/ifclear. */ if (!cond_is_active) continue; /* Process commands. */ if (*line == '@') { if (skip_to_end && n == 4 && !memcmp (line, "@end", 4) && (line[4]==' '||line[4]=='\t'||!line[4])) { skip_to_end = 0; } else if (cond_in_verbatim) { got_line = 1; } else if (n == 6 && !memcmp (line, "@macro", 6)) { macroname = xstrdup (p); macrovalue = xmalloc ((macrovaluesize = 1024)); macrovalueused = 0; } else if (n == 4 && !memcmp (line, "@set", 4)) { set_variable (p); } else if (n == 8 && !memcmp (line, "@manpage", 8)) { free (*section_name); *section_name = NULL; finish_page (); start_page (p); in_pause = 0; } else if (n == 8 && !memcmp (line, "@mansect", 8)) { if (!thepage.name) err ("%s:%d: section outside of a man page", fname, lnr); else { free (*section_name); *section_name = ascii_strupr (xstrdup (p)); in_pause = 0; skip_sect_line = 1; } } else if (n == 9 && !memcmp (line, "@manpause", 9)) { if (!*section_name) err ("%s:%d: pausing outside of a man section", fname, lnr); else if (in_pause) err ("%s:%d: already pausing", fname, lnr); else in_pause = 1; } else if (n == 8 && !memcmp (line, "@mancont", 8)) { if (!*section_name) err ("%s:%d: continue outside of a man section", fname, lnr); else if (!in_pause) err ("%s:%d: continue while not pausing", fname, lnr); else in_pause = 0; } else if (n == 5 && !memcmp (line, "@menu", 5) && (line[5]==' '||line[5]=='\t'||!line[5])) { skip_to_end = 1; } else if (n == 8 && !memcmp (line, "@include", 8) && (line[8]==' '||line[8]=='\t'||!line[8])) { char *incname = xstrdup (p); FILE *incfp = fopen (incname, "r"); if (!incfp && opt_include && *opt_include && *p != '/') { free (incname); incname = xmalloc (strlen (opt_include) + 1 + strlen (p) + 1); strcpy (incname, opt_include); if ( incname[strlen (incname)-1] != '/' ) strcat (incname, "/"); strcat (incname, p); incfp = fopen (incname, "r"); } if (!incfp) err ("can't open include file '%s': %s", incname, strerror (errno)); else { parse_file (incname, incfp, section_name, in_pause); fclose (incfp); } free (incname); } else if (n == 4 && !memcmp (line, "@bye", 4) && (line[4]==' '||line[4]=='\t'||!line[4])) { break; } else if (!skip_to_end) got_line = 1; } else if (!skip_to_end) got_line = 1; if (got_line && cond_in_verbatim) add_content (*section_name, line, 1); else if (got_line && thepage.name && *section_name && !in_pause) add_content (*section_name, line, 0); } if (ferror (fp)) err ("%s:%d: read error: %s", fname, lnr, strerror (errno)); free (macroname); free (macrovalue); free (line); } static void top_parse_file (const char *fname, FILE *fp) { char *section_name = NULL; /* Name of the current section or NULL if not in a section. */ macro_t m; while (macrolist) { macro_t next = macrolist->next; free (macrolist->value); free (macrolist); macrolist = next; } while (variablelist) { macro_t next = variablelist->next; free (variablelist->value); free (variablelist); variablelist = next; } for (m=predefinedmacrolist; m; m = m->next) set_macro (m->name, xstrdup ("1")); cond_is_active = 1; cond_in_verbatim = 0; parse_file (fname, fp, §ion_name, 0); free (section_name); finish_page (); } int main (int argc, char **argv) { int last_argc = -1; const char *s; opt_source = "GNU"; opt_release = ""; /* Define default macros. The trick is that these macros are not defined when using the actual texinfo renderer. */ add_predefined_macro ("isman"); add_predefined_macro ("manverb"); /* Option parsing. */ if (argc) { argc--; argv++; } while (argc && last_argc != argc ) { last_argc = argc; if (!strcmp (*argv, "--")) { argc--; argv++; break; } else if (!strcmp (*argv, "--help")) { puts ( "Usage: " PGM " [OPTION] [FILE]\n" "Extract man pages from a Texinfo source.\n\n" " --html render output as HTML\n" " --source NAME use NAME as source field\n" " --release STRING use STRING as the release field\n" " --date EPOCH use EPOCH as publication date\n" " --store write output using @manpage name\n" " --select NAME only output pages with @manpage NAME\n" " --verbose enable extra informational output\n" " --debug enable additional debug output\n" " --help display this help and exit\n" " -I DIR also search in include DIR\n" " -D MACRO define MACRO to 1\n\n" "With no FILE, or when FILE is -, read standard input.\n\n" "Report bugs to <https://bugs.gnupg.org>."); exit (0); } else if (!strcmp (*argv, "--version")) { puts (PGM " " VERSION "\n" "Copyright (C) 2005, 2017 g10 Code GmbH\n" "This program comes with ABSOLUTELY NO WARRANTY.\n" "This is free software, and you are welcome to redistribute it\n" "under certain conditions. See the file COPYING for details."); exit (0); } else if (!strcmp (*argv, "--html")) { htmlmode = 1; argc--; argv++; } else if (!strcmp (*argv, "--verbose")) { verbose = 1; argc--; argv++; } else if (!strcmp (*argv, "--quiet")) { quiet = 1; argc--; argv++; } else if (!strcmp (*argv, "--debug")) { verbose = debug = 1; argc--; argv++; } else if (!strcmp (*argv, "--source")) { argc--; argv++; if (argc) { opt_source = *argv; argc--; argv++; } } else if (!strcmp (*argv, "--release")) { argc--; argv++; if (argc) { opt_release = *argv; argc--; argv++; } } else if (!strcmp (*argv, "--date")) { argc--; argv++; if (argc) { opt_date = *argv; argc--; argv++; } } else if (!strcmp (*argv, "--store")) { opt_store = 1; argc--; argv++; } else if (!strcmp (*argv, "--select")) { argc--; argv++; if (argc) { opt_select = strrchr (*argv, '/'); if (opt_select) opt_select++; else opt_select = *argv; argc--; argv++; } } else if (!strcmp (*argv, "-I")) { argc--; argv++; if (argc) { opt_include = *argv; argc--; argv++; } } else if (!strcmp (*argv, "-D")) { argc--; argv++; if (argc) { add_predefined_macro (*argv); argc--; argv++; } } } if (argc > 1) die ("usage: " PGM " [OPTION] [FILE] (try --help for more information)\n"); /* Take care of supplied timestamp for reproducible builds. See * https://reproducible-builds.org/specs/source-date-epoch/ */ if (!opt_date && (s = getenv ("SOURCE_DATE_EPOCH")) && *s) opt_date = s; /* Start processing. */ if (argc && strcmp (*argv, "-")) { FILE *fp = fopen (*argv, "rb"); if (!fp) die ("%s:0: can't open file: %s", *argv, strerror (errno)); top_parse_file (*argv, fp); fclose (fp); } else top_parse_file ("-", stdin); return !!any_error; } /* Local Variables: compile-command: "gcc -Wall -g -Wall -o yat2m yat2m.c" End: */