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Diffstat (limited to 'contrib/texinfo/makeinfo/defun.c')
| -rw-r--r-- | contrib/texinfo/makeinfo/defun.c | 663 |
1 files changed, 663 insertions, 0 deletions
diff --git a/contrib/texinfo/makeinfo/defun.c b/contrib/texinfo/makeinfo/defun.c new file mode 100644 index 0000000..c62aba7 --- /dev/null +++ b/contrib/texinfo/makeinfo/defun.c @@ -0,0 +1,663 @@ +/* defun.c -- @defun and friends. + $Id: defun.c,v 1.11 1999/07/11 16:50:19 karl Exp $ + + Copyright (C) 1998, 99 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 2, 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, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "system.h" +#include "defun.h" +#include "insertion.h" +#include "makeinfo.h" + + +#define DEFUN_SELF_DELIMITING(c) \ + ((c) == '(' || (c) == ')' || (c) == '[' || (c) == ']') + +struct token_accumulator +{ + unsigned int length; + unsigned int index; + char **tokens; +}; + +static void +initialize_token_accumulator (accumulator) + struct token_accumulator *accumulator; +{ + accumulator->length = 0; + accumulator->index = 0; + accumulator->tokens = NULL; +} + +static void +accumulate_token (accumulator, token) + struct token_accumulator *accumulator; + char *token; +{ + if (accumulator->index >= accumulator->length) + { + accumulator->length += 10; + accumulator->tokens = xrealloc (accumulator->tokens, + (accumulator->length * sizeof (char *))); + } + accumulator->tokens[accumulator->index] = token; + accumulator->index += 1; +} + +/* Given STRING_POINTER pointing at an open brace, skip forward and return a + pointer to just past the matching close brace. */ +static int +scan_group_in_string (string_pointer) + char **string_pointer; +{ + char *scan_string = (*string_pointer) + 1; + unsigned int level = 1; + + for (;;) + { + int c; + if (level == 0) + { + *string_pointer = scan_string; + return 1; + } + c = *scan_string++; + if (c == 0) + { + /* Tweak line_number to compensate for fact that + we gobbled the whole line before coming here. */ + line_number -= 1; + line_error (_("Missing `}' in @def arg")); + line_number += 1; + *string_pointer = scan_string - 1; + return 0; + } + + if (c == '{') + level += 1; + if (c == '}') + level -= 1; + } +} + +/* Return a list of tokens from the contents of STRING. + Commands and brace-delimited groups count as single tokens. + Contiguous whitespace characters are converted to a token + consisting of a single space. */ +static char ** +args_from_string (string) + char *string; +{ + struct token_accumulator accumulator; + char *token_start, *token_end; + char *scan_string = string; + + initialize_token_accumulator (&accumulator); + + while (*scan_string) + { /* Replace arbitrary whitespace by a single space. */ + if (whitespace (*scan_string)) + { + scan_string += 1; + while (whitespace (*scan_string)) + scan_string += 1; + accumulate_token ((&accumulator), (xstrdup (" "))); + continue; + } + + /* Commands count as single tokens. */ + if (*scan_string == COMMAND_PREFIX) + { + token_start = scan_string; + scan_string += 1; + if (self_delimiting (*scan_string)) + scan_string += 1; + else + { + int c; + while (1) + { + c = *scan_string++; + + if ((c == 0) || (c == '{') || (whitespace (c))) + { + scan_string -= 1; + break; + } + } + + if (*scan_string == '{') + { + char *s = scan_string; + (void) scan_group_in_string (&s); + scan_string = s; + } + } + token_end = scan_string; + } + + /* Parentheses and brackets are self-delimiting. */ + else if (DEFUN_SELF_DELIMITING (*scan_string)) + { + token_start = scan_string; + scan_string += 1; + token_end = scan_string; + } + + /* Open brace introduces a group that is a single token. */ + else if (*scan_string == '{') + { + char *s = scan_string; + int balanced = scan_group_in_string (&s); + + token_start = scan_string + 1; + scan_string = s; + token_end = balanced ? (scan_string - 1) : scan_string; + } + + /* Otherwise a token is delimited by whitespace, parentheses, + brackets, or braces. A token is also ended by a command. */ + else + { + token_start = scan_string; + + for (;;) + { + int c; + + c = *scan_string++; + + /* Do not back up if we're looking at a }; since the only + valid }'s are those matched with {'s, we want to give + an error. If we back up, we go into an infinite loop. */ + if (!c || whitespace (c) || DEFUN_SELF_DELIMITING (c) + || c == '{') + { + scan_string--; + break; + } + + /* If we encounter a command embedded within a token, + then end the token. */ + if (c == COMMAND_PREFIX) + { + scan_string--; + break; + } + } + token_end = scan_string; + } + + accumulate_token (&accumulator, substring (token_start, token_end)); + } + accumulate_token (&accumulator, NULL); + return accumulator.tokens; +} + +static void +process_defun_args (defun_args, auto_var_p) + char **defun_args; + int auto_var_p; +{ + int pending_space = 0; + + for (;;) + { + char *defun_arg = *defun_args++; + + if (defun_arg == NULL) + break; + + if (defun_arg[0] == ' ') + { + pending_space = 1; + continue; + } + + if (pending_space) + { + add_char (' '); + pending_space = 0; + } + + if (DEFUN_SELF_DELIMITING (defun_arg[0])) + add_char (defun_arg[0]); + else if (defun_arg[0] == '&') + if (html) + { + defun_arg = escape_string (xstrdup (defun_arg)); + add_word (defun_arg); + free (defun_arg); + } + else + add_word (defun_arg); + else if (defun_arg[0] == COMMAND_PREFIX) + execute_string ("%s", defun_arg); + else if (auto_var_p) + if (html) + { + defun_arg = escape_string (xstrdup (defun_arg)); + add_word (defun_arg); + free (defun_arg); + } + else + add_word (defun_arg); + else + add_word (defun_arg); + } +} + +static char * +next_nonwhite_defun_arg (arg_pointer) + char ***arg_pointer; +{ + char **scan = (*arg_pointer); + char *arg = (*scan++); + + if ((arg != 0) && (*arg == ' ')) + arg = *scan++; + + if (arg == 0) + scan -= 1; + + *arg_pointer = scan; + + return (arg == 0) ? "" : arg; +} + + +/* This is needed also in insertion.c. */ + +enum insertion_type +get_base_type (type) + enum insertion_type type; +{ + enum insertion_type base_type; + switch (type) + { + case defivar: base_type = defcv; break; + case defmac: base_type = deffn; break; + case defmethod: base_type = defop; break; + case defopt: base_type = defvr; break; + case defspec: base_type = deffn; break; + case deftypefun: base_type = deftypefn; break; + case deftypeivar: base_type = deftypeivar; break; + case deftypemethod: base_type = deftypemethod; break; + case deftypeop: base_type = deftypeop; break; + case deftypevar: base_type = deftypevr; break; + case defun: base_type = deffn; break; + case defvar: base_type = defvr; break; + default: + base_type = type; + break; + } + + return base_type; +} + +/* Make the defun type insertion. + TYPE says which insertion this is. + X_P, if nonzero, says not to start a new insertion. */ +static void +defun_internal (type, x_p) + enum insertion_type type; + int x_p; +{ + enum insertion_type base_type; + char **defun_args, **scan_args; + char *category, *defined_name, *type_name, *type_name2; + + { + char *line; + + /* The @def.. line is the only place in Texinfo where you are + allowed to use unquoted braces that don't delimit arguments of + a command or a macro; in any other place it will trigger an + error message from the reader loop. The special handling of + this case inside `args_from_string' is an extra special hack + which allows this. The side effect is that if we try to expand + the rest of the line below, the recursive reader loop will + signal an error if there are brace-delimited arguments on that line. + + The best solution to this would be to change the syntax of + @def.. commands so that it doesn't violate Texinfo's own rules. + But it's probably too late for this now, as it will break a lot + of existing manuals. + + Unfortunately, this means that you can't call macros, use @value, etc. + inside @def.. commands, sigh. */ + get_rest_of_line (0, &line); + defun_args = (args_from_string (line)); + free (line); + } + + scan_args = defun_args; + + /* Get base type and category string. */ + base_type = get_base_type (type); + + /* xx all these const strings should be determined upon + documentlanguage argument and NOT via gettext (kama). */ + switch (type) + { + case defun: + case deftypefun: + category = _("Function"); + break; + case defmac: + category = _("Macro"); + break; + case defspec: + category = _("Special Form"); + break; + case defvar: + case deftypevar: + category = _("Variable"); + break; + case defopt: + category = _("User Option"); + break; + case defivar: + case deftypeivar: + category = _("Instance Variable"); + break; + case defmethod: + case deftypemethod: + category = _("Method"); + break; + default: + category = next_nonwhite_defun_arg (&scan_args); + break; + } + + /* The class name. */ + if ((base_type == deftypefn) + || (base_type == deftypevr) + || (base_type == defcv) + || (base_type == defop) + || (base_type == deftypeivar) + || (base_type == deftypemethod) + || (base_type == deftypeop) + ) + type_name = next_nonwhite_defun_arg (&scan_args); + + /* The type name for typed languages. */ + if (base_type == deftypemethod + || base_type == deftypeivar + || base_type == deftypeop + ) + type_name2 = next_nonwhite_defun_arg (&scan_args); + + /* The function or whatever that's actually being defined. */ + defined_name = next_nonwhite_defun_arg (&scan_args); + + /* This hack exists solely for the purposes of formatting the Texinfo + manual. I couldn't think of a better way. The token might be a + simple @@ followed immediately by more text. If this is the case, + then the next defun arg is part of this one, and we should + concatenate them. */ + if (*scan_args && **scan_args && !whitespace (**scan_args) + && STREQ (defined_name, "@@")) + { + char *tem = xmalloc (3 + strlen (scan_args[0])); + + sprintf (tem, "@@%s", scan_args[0]); + + free (scan_args[0]); + scan_args[0] = tem; + scan_args++; + defined_name = tem; + } + + if (!x_p) + begin_insertion (type); + + /* Write the definition header line. + This should start at the normal indentation. */ + current_indent -= default_indentation_increment; + start_paragraph (); + + if (html && !x_p) + /* Start the definition on new paragraph. */ + add_word ("<p>\n"); + + if (!html) + switch (base_type) + { + case deffn: + case defvr: + case deftp: + execute_string (" -- %s: %s", category, defined_name); + break; + case deftypefn: + case deftypevr: + execute_string (" -- %s: %s %s", category, type_name, defined_name); + break; + case defcv: + execute_string (" -- %s %s %s: %s", category, _("of"), type_name, + defined_name); + break; + case deftypeivar: + execute_string (" -- %s %s %s: %s %s", category, _("of"), type_name, + type_name2, defined_name); + break; + case defop: + execute_string (" -- %s %s %s: %s", category, _("on"), type_name, + defined_name); + break; + case deftypeop: + execute_string (" -- %s %s %s: %s %s", category, _("on"), type_name, + type_name2, defined_name); + break; + case deftypemethod: + execute_string (" -- %s %s %s: %s %s", category, _("on"), type_name, + type_name2, defined_name); + break; + } + + if (html) + { + /* If this is not a @def...x version, it could only + be a normal version @def.... So start the table here. */ + if (!x_p) + add_word ("<table width=\"100%\">\n"); + + /* If this is an @def...x there has to be an other @def... before + it, so this is only a new row within an existing table. With + two complete standalone tables the gap between them is too big. */ + add_word ("<tr>\n"); + add_word ("<td align=\"left\">"); + + switch (base_type) + { + case deffn: + case defvr: + case deftp: + /* <i> is for the following function arguments. */ + add_word_args ("<b>%s</b><i>", defined_name); + break; + case deftypefn: + case deftypevr: + add_word_args ("%s <b>%s</b><i>", type_name, defined_name); + break; + case defcv: + case defop: + add_word_args ("<b>%s</b><i>", defined_name); + break; + case deftypemethod: + case deftypeop: + case deftypeivar: + add_word_args ("%s <b>%s</b><i>", type_name2, defined_name); + break; + } + } /* if (html)... */ + + current_indent += default_indentation_increment; + + /* Now process the function arguments, if any. If these carry onto + the next line, they should be indented by two increments to + distinguish them from the body of the definition, which is indented + by one increment. */ + current_indent += default_indentation_increment; + + switch (base_type) + { + case deffn: + case defop: + process_defun_args (scan_args, 1); + break; + + /* Through Makeinfo 1.67 we processed remaining args only for deftp, + deftypefn, and deftypemethod. But the libc manual, for example, + needs to say: + @deftypevar {char *} tzname[2] + And simply allowing the extra text seems far simpler than trying + to invent yet more defn commands. In any case, we should either + output it or give an error, not silently ignore it. */ + default: + process_defun_args (scan_args, 0); + break; + } + + current_indent -= default_indentation_increment; + close_single_paragraph (); + + if (html) + { + /* xx The single words (on, off) used here, should depend on + documentlanguage and NOT on gettext --kama. */ + switch (base_type) + { + case deffn: + case defvr: + case deftp: + case deftypefn: + case deftypevr: + add_word ("</i>"); /* close italic area for arguments */ + /* put the rest into the second column */ + add_word_args ("</td>\n<td align=\"right\">%s", category); + break; + + case defcv: + add_word ("</td>\n<td align=\"right\">"); + add_word_args ("%s %s %s", category, _("of"), type_name); + break; + + case defop: + case deftypemethod: + case deftypeop: + add_word ("</i>"); + add_word ("</td>\n<td align=\"right\">"); + add_word_args ("%s %s %s", category, _("on"), type_name); + break; + + case deftypeivar: + add_word ("</i>"); + add_word ("</td>\n<td align=\"right\">"); + add_word_args ("%s %s %s", category, _("of"), type_name); + break; + } /* switch (base_type)... */ + + add_word ("</td>\n"); /* close second column */ + add_word ("</tr>\n"); /* close row */ + + /* This is needed because I have to know if the next line is + normal text or another @def..x. If text follows, create a new + table to get the indentation for the following text. + + This construction would fail if someone uses: + @deffn + @sp 2 + @deffnx + . + @end deffn + But we don't care. */ + if (!looking_at ("@def")) + { + add_word ("</table>\n"); + add_word ("<table width=\"95%\" align=\"center\">\n"); + add_word ("<tr><td>\n"); + } + + } /* if (html)... */ + + /* Make an entry in the appropriate index. */ + switch (base_type) + { + case deffn: + case deftypefn: + execute_string ("@findex %s\n", defined_name); + break; + case defvr: + case deftypevr: + case defcv: + execute_string ("@vindex %s\n", defined_name); + break; + case deftypeivar: + execute_string ("@vindex %s %s %s\n", defined_name, _("of"), type_name); + break; + case defop: + case deftypeop: + case deftypemethod: + execute_string ("@findex %s %s %s\n", defined_name, _("on"), type_name); + break; + case deftp: + execute_string ("@tindex %s\n", defined_name); + break; + } + + /* Deallocate the token list. */ + scan_args = defun_args; + while (1) + { + char * arg = (*scan_args++); + if (arg == NULL) + break; + free (arg); + } + free (defun_args); +} + +/* Add an entry for a function, macro, special form, variable, or option. + If the name of the calling command ends in `x', then this is an extra + entry included in the body of an insertion of the same type. */ +void +cm_defun () +{ + int x_p; + enum insertion_type type; + char *temp = xstrdup (command); + + x_p = (command[strlen (command) - 1] == 'x'); + + if (x_p) + temp[strlen (temp) - 1] = 0; + + type = find_type_from_name (temp); + free (temp); + + /* If we are adding to an already existing insertion, then make sure + that we are already in an insertion of type TYPE. */ + if (x_p && (!insertion_level || insertion_stack->insertion != type)) + { + line_error (_("Must be in `%s' insertion to use `%sx'"), + command, command); + discard_until ("\n"); + return; + } + + defun_internal (type, x_p); +} |
