mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-24 07:20:37 +00:00
699 lines
16 KiB
C
699 lines
16 KiB
C
/* Generate doc-string file for GNU Emacs from source files.
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Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* The arguments given to this program are all the C and Lisp source files
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of GNU Emacs. .elc and .el and .c files are allowed.
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A .o file can also be specified; the .c file it was made from is used.
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This helps the makefile pass the correct list of files.
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The results, which go to standard output or to a file
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specified with -a or -o (-a to append, -o to start from nothing),
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are entries containing function or variable names and their documentation.
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Each entry starts with a ^_ character.
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Then comes F for a function or V for a variable.
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Then comes the function or variable name, terminated with a newline.
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Then comes the documentation for that function or variable.
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*/
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#include <stdio.h>
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FILE *outfile;
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main (argc, argv)
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int argc;
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char **argv;
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{
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int i;
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int err_count = 0;
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outfile = stdout;
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/* If first two args are -o FILE, output to FILE. */
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i = 1;
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if (argc > i + 1 && !strcmp (argv[i], "-o"))
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{
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outfile = fopen (argv[i + 1], "w");
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i += 2;
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}
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if (argc > i + 1 && !strcmp (argv[i], "-a"))
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{
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outfile = fopen (argv[i + 1], "a");
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i += 2;
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}
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for (; i < argc; i++)
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err_count += scan_file (argv[i]); /* err_count seems to be {mis,un}used */
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#ifndef VMS
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exit (err_count); /* see below - shane */
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#endif VMS
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}
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/* Read file FILENAME and output its doc strings to outfile. */
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/* Return 1 if file is not found, 0 if it is found. */
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scan_file (filename)
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char *filename;
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{
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int len = strlen (filename);
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if (!strcmp (filename + len - 4, ".elc"))
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return scan_lisp_file (filename);
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else if (!strcmp (filename + len - 3, ".el"))
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return scan_lisp_file (filename);
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else
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return scan_c_file (filename);
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}
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char buf[128];
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/* Skip a C string from INFILE,
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and return the character that follows the closing ".
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If printflag is positive, output string contents to outfile.
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If it is negative, store contents in buf.
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Convert escape sequences \n and \t to newline and tab;
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discard \ followed by newline. */
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read_c_string (infile, printflag)
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FILE *infile;
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int printflag;
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{
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register int c;
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char *p = buf;
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c = getc (infile);
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while (c != EOF)
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{
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while (c != '"' && c != EOF)
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{
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if (c == '\\')
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{
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c = getc (infile);
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if (c == '\n')
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{
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c = getc (infile);
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continue;
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}
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if (c == 'n')
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c = '\n';
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if (c == 't')
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c = '\t';
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}
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if (printflag > 0)
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putc (c, outfile);
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else if (printflag < 0)
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*p++ = c;
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c = getc (infile);
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}
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c = getc (infile);
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if (c != '"')
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break;
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if (printflag > 0)
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putc (c, outfile);
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else if (printflag < 0)
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*p++ = c;
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c = getc (infile);
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}
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if (printflag < 0)
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*p = 0;
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return c;
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}
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/* Write to file OUT the argument names of the function whose text is in BUF.
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MINARGS and MAXARGS are the minimum and maximum number of arguments. */
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write_c_args (out, buf, minargs, maxargs)
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FILE *out;
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char *buf;
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int minargs, maxargs;
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{
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register char *p;
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int in_ident = 0;
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int just_spaced = 0;
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fprintf (out, "arguments: ");
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for (p = buf; *p; p++)
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{
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char c = *p;
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int ident_start = 0;
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/* Notice when we start printing a new identifier. */
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if ((('A' <= c && c <= 'Z')
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|| ('a' <= c && c <= 'z')
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|| ('0' <= c && c <= '9')
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|| c == '_')
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!= in_ident)
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{
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if (!in_ident)
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{
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in_ident = 1;
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ident_start = 1;
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if (minargs == 0 && maxargs > 0)
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fprintf (out, "&optional ");
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just_spaced = 1;
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minargs--;
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maxargs--;
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}
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else
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in_ident = 0;
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}
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/* Print the C argument list as it would appear in lisp:
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print underscores as hyphens, and print commas as spaces.
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Collapse adjacent spaces into one. */
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if (c == '_') c = '-';
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if (c == ',') c = ' ';
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/* In C code, `default' is a reserved word, so we spell it
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`defalt'; unmangle that here. */
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if (ident_start
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&& strncmp (p, "defalt", 6) == 0
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&& ! (('A' <= p[6] && p[6] <= 'Z')
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|| ('a' <= p[6] && p[6] <= 'z')
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|| ('0' <= p[6] && p[6] <= '9')
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|| p[6] == '_'))
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{
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fprintf (out, "default");
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p += 5;
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in_ident = 0;
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just_spaced = 0;
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}
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else if (c != ' ' || ! just_spaced)
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putc (c, out);
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just_spaced = (c == ' ');
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}
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}
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/* Read through a c file. If a .o file is named,
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the corresponding .c file is read instead.
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Looks for DEFUN constructs such as are defined in ../src/lisp.h.
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Accepts any word starting DEF... so it finds DEFSIMPLE and DEFPRED. */
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scan_c_file (filename)
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char *filename;
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{
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FILE *infile;
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register int c;
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register int commas;
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register int defunflag;
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register int defvarperbufferflag;
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register int defvarflag;
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int minargs, maxargs;
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if (filename[strlen (filename) - 1] == 'o')
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filename[strlen (filename) - 1] = 'c';
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infile = fopen (filename, "r");
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/* No error if non-ex input file */
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if (infile == NULL)
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{
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perror (filename);
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return 0;
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}
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c = '\n';
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while (!feof (infile))
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{
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if (c != '\n')
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{
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c = getc (infile);
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continue;
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}
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c = getc (infile);
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if (c == ' ')
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{
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while (c == ' ')
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c = getc (infile);
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if (c != 'D')
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continue;
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c = getc (infile);
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if (c != 'E')
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continue;
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c = getc (infile);
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if (c != 'F')
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continue;
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c = getc (infile);
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if (c != 'V')
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continue;
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c = getc (infile);
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if (c != 'A')
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continue;
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c = getc (infile);
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if (c != 'R')
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continue;
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c = getc (infile);
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if (c != '_')
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continue;
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defvarflag = 1;
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defunflag = 0;
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c = getc (infile);
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defvarperbufferflag = (c == 'P');
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c = getc (infile);
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}
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else if (c == 'D')
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{
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c = getc (infile);
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if (c != 'E')
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continue;
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c = getc (infile);
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if (c != 'F')
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continue;
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c = getc (infile);
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defunflag = c == 'U';
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defvarflag = 0;
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}
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else continue;
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while (c != '(')
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{
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if (c < 0)
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goto eof;
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c = getc (infile);
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}
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c = getc (infile);
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if (c != '"')
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continue;
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c = read_c_string (infile, -1);
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if (defunflag)
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commas = 5;
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else if (defvarperbufferflag)
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commas = 2;
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else if (defvarflag)
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commas = 1;
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else /* For DEFSIMPLE and DEFPRED */
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commas = 2;
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while (commas)
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{
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if (c == ',')
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{
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commas--;
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if (defunflag && (commas == 1 || commas == 2))
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{
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do
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c = getc (infile);
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while (c == ' ' || c == '\n' || c == '\t');
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if (c < 0)
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goto eof;
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ungetc (c, infile);
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if (commas == 2) /* pick up minargs */
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fscanf (infile, "%d", &minargs);
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else /* pick up maxargs */
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if (c == 'M' || c == 'U') /* MANY || UNEVALLED */
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maxargs = -1;
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else
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fscanf (infile, "%d", &maxargs);
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}
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}
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if (c < 0)
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goto eof;
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c = getc (infile);
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}
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while (c == ' ' || c == '\n' || c == '\t')
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c = getc (infile);
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if (c == '"')
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c = read_c_string (infile, 0);
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while (c != ',')
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c = getc (infile);
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c = getc (infile);
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while (c == ' ' || c == '\n' || c == '\t')
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c = getc (infile);
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if (c == '"')
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{
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putc (037, outfile);
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putc (defvarflag ? 'V' : 'F', outfile);
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fprintf (outfile, "%s\n", buf);
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c = read_c_string (infile, 1);
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/* If this is a defun, find the arguments and print them. If
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this function takes MANY or UNEVALLED args, then the C source
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won't give the names of the arguments, so we shouldn't bother
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trying to find them. */
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if (defunflag && maxargs != -1)
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{
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char argbuf[1024], *p = argbuf;
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while (c != ')')
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{
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if (c < 0)
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goto eof;
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c = getc (infile);
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}
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/* Skip into arguments. */
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while (c != '(')
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{
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if (c < 0)
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goto eof;
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c = getc (infile);
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}
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/* Copy arguments into ARGBUF. */
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*p++ = c;
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do
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*p++ = c = getc (infile);
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while (c != ')');
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*p = '\0';
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/* Output them. */
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fprintf (outfile, "\n\n");
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write_c_args (outfile, argbuf, minargs, maxargs);
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}
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}
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}
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eof:
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fclose (infile);
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return 0;
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}
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/* Read a file of Lisp code, compiled or interpreted.
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Looks for
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(defun NAME ARGS DOCSTRING ...)
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(defmacro NAME ARGS DOCSTRING ...)
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(autoload (quote NAME) FILE DOCSTRING ...)
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(defvar NAME VALUE DOCSTRING)
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(defconst NAME VALUE DOCSTRING)
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(fset (quote NAME) (make-byte-code ... DOCSTRING ...))
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(fset (quote NAME) #[... DOCSTRING ...])
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starting in column zero.
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(quote NAME) may appear as 'NAME as well.
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For defun, defmacro, and autoload, we know how to skip over the arglist.
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For defvar, defconst, and fset we skip to the docstring with a klugey
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formatting convention: all docstrings must appear on the same line as the
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initial open-paren (the one in column zero) and must contain a backslash
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and a double-quote immediately after the initial double-quote. No newlines
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must appear between the beginning of the form and the first double-quote.
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The only source file that must follow this convention is loaddefs.el; aside
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from that, it is always the .elc file that we look at, and they are no
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problem because byte-compiler output follows this convention.
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The NAME and DOCSTRING are output.
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NAME is preceded by `F' for a function or `V' for a variable.
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An entry is output only if DOCSTRING has \ newline just after the opening "
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*/
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void
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skip_white (infile)
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FILE *infile;
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{
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char c = ' ';
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while (c == ' ' || c == '\t' || c == '\n')
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c = getc (infile);
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ungetc (c, infile);
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}
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void
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read_lisp_symbol (infile, buffer)
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FILE *infile;
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char *buffer;
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{
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char c;
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char *fillp = buffer;
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skip_white (infile);
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while (1)
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{
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c = getc (infile);
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if (c == '\\')
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*(++fillp) = getc (infile);
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else if (c == ' ' || c == '\t' || c == '\n' || c == '(' || c == ')')
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{
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ungetc (c, infile);
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*fillp = 0;
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break;
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}
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else
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*fillp++ = c;
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}
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if (! buffer[0])
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fprintf (stderr, "## expected a symbol, got '%c'\n", c);
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skip_white (infile);
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}
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scan_lisp_file (filename)
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char *filename;
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{
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FILE *infile;
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register int c;
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infile = fopen (filename, "r");
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if (infile == NULL)
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{
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perror (filename);
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return 0; /* No error */
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}
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c = '\n';
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while (!feof (infile))
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{
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char buffer [BUFSIZ];
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char *fillp = buffer;
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char type;
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if (c != '\n')
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{
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c = getc (infile);
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continue;
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}
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c = getc (infile);
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if (c != '(')
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continue;
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read_lisp_symbol (infile, buffer);
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if (! strcmp (buffer, "defun") ||
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! strcmp (buffer, "defmacro"))
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{
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type = 'F';
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read_lisp_symbol (infile, buffer);
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/* Skip the arguments: either "nil" or a list in parens */
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c = getc (infile);
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if (c == 'n') /* nil */
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{
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if ((c = getc (infile)) != 'i' ||
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(c = getc (infile)) != 'l')
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{
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fprintf (stderr, "## unparsable arglist in %s (%s)\n",
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buffer, filename);
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continue;
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}
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}
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else if (c != '(')
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{
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fprintf (stderr, "## unparsable arglist in %s (%s)\n",
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buffer, filename);
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continue;
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}
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else
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while (c != ')')
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c = getc (infile);
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skip_white (infile);
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/* If the next three characters aren't `dquote bslash newline'
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then we're not reading a docstring.
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*/
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if ((c = getc (infile)) != '"' ||
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(c = getc (infile)) != '\\' ||
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(c = getc (infile)) != '\n')
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{
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#ifdef DEBUG
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fprintf (stderr, "## non-docstring in %s (%s)\n",
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buffer, filename);
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#endif
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continue;
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}
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}
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else if (! strcmp (buffer, "defvar") ||
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! strcmp (buffer, "defconst"))
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{
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char c1 = 0, c2 = 0;
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type = 'V';
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read_lisp_symbol (infile, buffer);
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/* Skip until the first newline; remember the two previous chars. */
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while (c != '\n' && c >= 0)
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{
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c2 = c1;
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c1 = c;
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c = getc (infile);
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}
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/* If two previous characters were " and \,
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this is a doc string. Otherwise, there is none. */
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if (c2 != '"' || c1 != '\\')
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{
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#ifdef DEBUG
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fprintf (stderr, "## non-docstring in %s (%s)\n",
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buffer, filename);
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#endif
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continue;
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}
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}
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else if (! strcmp (buffer, "fset"))
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{
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char c1 = 0, c2 = 0;
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type = 'F';
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c = getc (infile);
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if (c == '\'')
|
||
read_lisp_symbol (infile, buffer);
|
||
else
|
||
{
|
||
if (c != '(')
|
||
{
|
||
fprintf (stderr, "## unparsable name in fset in %s\n",
|
||
filename);
|
||
continue;
|
||
}
|
||
read_lisp_symbol (infile, buffer);
|
||
if (strcmp (buffer, "quote"))
|
||
{
|
||
fprintf (stderr, "## unparsable name in fset in %s\n",
|
||
filename);
|
||
continue;
|
||
}
|
||
read_lisp_symbol (infile, buffer);
|
||
c = getc (infile);
|
||
if (c != ')')
|
||
{
|
||
fprintf (stderr,
|
||
"## unparsable quoted name in fset in %s\n",
|
||
filename);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
/* Skip until the first newline; remember the two previous chars. */
|
||
while (c != '\n' && c >= 0)
|
||
{
|
||
c2 = c1;
|
||
c1 = c;
|
||
c = getc (infile);
|
||
}
|
||
|
||
/* If two previous characters were " and \,
|
||
this is a doc string. Otherwise, there is none. */
|
||
if (c2 != '"' || c1 != '\\')
|
||
{
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "## non-docstring in %s (%s)\n",
|
||
buffer, filename);
|
||
#endif
|
||
continue;
|
||
}
|
||
}
|
||
|
||
else if (! strcmp (buffer, "autoload"))
|
||
{
|
||
type = 'F';
|
||
c = getc (infile);
|
||
if (c == '\'')
|
||
read_lisp_symbol (infile, buffer);
|
||
else
|
||
{
|
||
if (c != '(')
|
||
{
|
||
fprintf (stderr, "## unparsable name in autoload in %s\n",
|
||
filename);
|
||
continue;
|
||
}
|
||
read_lisp_symbol (infile, buffer);
|
||
if (strcmp (buffer, "quote"))
|
||
{
|
||
fprintf (stderr, "## unparsable name in autoload in %s\n",
|
||
filename);
|
||
continue;
|
||
}
|
||
read_lisp_symbol (infile, buffer);
|
||
c = getc (infile);
|
||
if (c != ')')
|
||
{
|
||
fprintf (stderr,
|
||
"## unparsable quoted name in autoload in %s\n",
|
||
filename);
|
||
continue;
|
||
}
|
||
}
|
||
skip_white (infile);
|
||
if ((c = getc (infile)) != '\"')
|
||
{
|
||
fprintf (stderr, "## autoload of %s unparsable (%s)\n",
|
||
buffer, filename);
|
||
continue;
|
||
}
|
||
read_c_string (infile, 0);
|
||
skip_white (infile);
|
||
|
||
/* If the next three characters aren't `dquote bslash newline'
|
||
then we're not reading a docstring.
|
||
*/
|
||
if ((c = getc (infile)) != '"' ||
|
||
(c = getc (infile)) != '\\' ||
|
||
(c = getc (infile)) != '\n')
|
||
{
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "## non-docstring in %s (%s)\n",
|
||
buffer, filename);
|
||
#endif
|
||
continue;
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
else if (! strcmp (buffer, "if") ||
|
||
! strcmp (buffer, "byte-code"))
|
||
;
|
||
#endif
|
||
|
||
else
|
||
{
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "## unrecognised top-level form, %s (%s)\n",
|
||
buffer, filename);
|
||
#endif
|
||
continue;
|
||
}
|
||
|
||
/* At this point, there is a docstring that we should gobble.
|
||
The opening quote (and leading backslash-newline) have already
|
||
been read.
|
||
*/
|
||
putc ('\n', outfile);
|
||
putc (037, outfile);
|
||
putc (type, outfile);
|
||
fprintf (outfile, "%s\n", buffer);
|
||
read_c_string (infile, 1);
|
||
}
|
||
fclose (infile);
|
||
return 0;
|
||
}
|