mirror of
https://github.com/wrog/lambdamoo
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0e0d6bf8e1
Time to impose some discipline on #include header ordering:
(1) We need to be absolutely certain everybody is seeing
the SAME #define settings from config.h and options.h
(so many of the my_foo.h depend on config.h settings
and yet config.h was being listed later. how did this happen?)
(2) It REALLY helps for documentation and code comprehension
to have .c files clearly point to the .h files that
export their interfaces (usually it's the like-named .h
but sometimes it is not and this can be confusing to
the newbie maintainer)
So... new rules:
For .h files:
config.h if referenced, goes FIRST.
options.h if referenced, goes SECOND.
For .c files the ordering of #includes shall be:
(1) The .h file(s) defining the exported interfaces
that this .c file is implementing
(typically this will be just one file, foo.h
if this is foo.c, but exceptions exist)
(2) config.h, then options.h, in a stanza by themselves
if referenced and not already included by (1)
For both .c and .h files we then have two more stanzas:
(3) system headers,
including the "my-foo.h" corrective headers.
(4) own headers, other than the ones that go in (1)
Except for special cases like net_proto.c and net_mplex.c
where the whole purpose of the file is to BE an #include festival,
there should be no further #includes after the initial block.
All includes should appear at the top of the file where we can see them.
... ok, I'm done.
298 lines
7 KiB
C
298 lines
7 KiB
C
/******************************************************************************
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Copyright (c) 1992, 1995, 1996 Xerox Corporation. All rights reserved.
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Portions of this code were written by Stephen White, aka ghond.
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Use and copying of this software and preparation of derivative works based
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upon this software are permitted. Any distribution of this software or
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derivative works must comply with all applicable United States export
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control laws. This software is made available AS IS, and Xerox Corporation
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makes no warranty about the software, its performance or its conformity to
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any specification. Any person obtaining a copy of this software is requested
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to send their name and post office or electronic mail address to:
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Pavel Curtis
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Xerox PARC
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3333 Coyote Hill Rd.
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Palo Alto, CA 94304
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Pavel@Xerox.Com
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*****************************************************************************/
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#include "parse_cmd.h"
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#include "my-ctype.h"
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#include "my-stdio.h"
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#include "my-stdlib.h"
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#include "my-string.h"
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#include "my-time.h"
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#include "db.h"
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#include "list.h"
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#include "match.h"
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#include "storage.h"
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#include "structures.h"
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#include "utils.h"
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char **
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parse_into_words(char *input, int *nwords)
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{
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static char **words = 0;
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static int max_words = 0;
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int in_quotes = 0;
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char *ptr = input;
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if (!words) {
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max_words = 50;
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words = mymalloc(max_words * sizeof(char *), M_STRING_PTRS);
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}
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while (*input == ' ')
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input++;
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for (*nwords = 0; *input != '\0'; (*nwords)++) {
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if (*nwords == max_words) {
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int new_max = max_words * 2;
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char **new = mymalloc(new_max * sizeof(char *), M_STRING_PTRS);
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int i;
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for (i = 0; i < max_words; i++)
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new[i] = words[i];
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myfree(words, M_STRING_PTRS);
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words = new;
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max_words = new_max;
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}
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words[*nwords] = ptr;
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while (*input != '\0' && (in_quotes || *input != ' ')) {
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char c = *(input++);
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if (c == '"')
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in_quotes = !in_quotes;
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else if (c == '\\') {
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if (*input != '\0')
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*(ptr++) = *(input++);
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} else
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*(ptr++) = c;
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}
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while (*input == ' ')
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input++;
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*(ptr++) = '\0';
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}
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return words;
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}
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static char *
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build_string(int argc, char *argv[])
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{
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int i, len = 0;
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char *str;
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if (!argc)
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return str_dup("");
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len = strlen(argv[0]);
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for (i = 1; i < argc; i++)
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len += 1 + strlen(argv[i]);
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str = (char *) mymalloc(len + 1, M_STRING);
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strcpy(str, argv[0]);
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for (i = 1; i < argc; i++) {
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strcat(str, " ");
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strcat(str, argv[i]);
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}
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return str;
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}
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#define MAXWORDS 500 /* maximum number of words in a line */
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/* This limit should be removed... */
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Var
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parse_into_wordlist(const char *command)
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{
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int argc, i;
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char **argv;
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Var args;
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char *s = str_dup(command);
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argv = parse_into_words(s, &argc);
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args = new_list(argc);
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for (i = 1; i <= argc; i++) {
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args.v.list[i].type = TYPE_STR;
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args.v.list[i].v.str = str_dup(argv[i - 1]);
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}
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free_str(s);
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return args;
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}
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Parsed_Command *
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parse_command(const char *command, Objid user)
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{
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static Parsed_Command pc;
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const char *argstr;
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char *buf;
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const char *verb;
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int argc;
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char **argv;
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int pstart, pend, dlen;
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int i;
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while (*command == ' ')
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command++;
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switch (*command) {
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case '"':
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verb = "say";
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goto finish_specials;
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case ':':
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verb = "emote";
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goto finish_specials;
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case ';':
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verb = "eval";
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goto finish_specials;
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finish_specials:
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argstr = command + 1;
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buf = (char *) mymalloc(strlen(argstr) + strlen(verb) + 2,
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M_STRING);
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strcpy(buf, verb);
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strcat(buf, " ");
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strcat(buf, argstr);
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break;
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default:
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buf = str_dup(command);
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{ /* Skip past even complexly-quoted verbs */
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int in_quotes = 0;
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argstr = command;
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while (*argstr && (in_quotes || *argstr != ' ')) {
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char c = *(argstr++);
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if (c == '"')
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in_quotes = !in_quotes;
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else if (c == '\\' && *argstr)
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argstr++;
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}
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}
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while (*argstr == ' ')
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argstr++;
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break;
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}
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argv = parse_into_words(buf, &argc);
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if (argc == 0) {
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free_str(buf);
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return 0;
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}
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pc.verb = str_dup(argv[0]);
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pc.argstr = str_dup(argstr);
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pc.args = new_list(argc - 1);
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for (i = 1; i < argc; i++) {
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pc.args.v.list[i].type = TYPE_STR;
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pc.args.v.list[i].v.str = str_dup(argv[i]);
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}
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/*
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* look for a preposition
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*/
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if (argc > 1) {
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pc.prep = db_find_prep(argc - 1, argv + 1, &pstart, &pend);
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if (pc.prep == PREP_NONE) {
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pstart = argc;
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pend = argc;
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} else {
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pstart++;
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pend++;
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}
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} else {
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pc.prep = PREP_NONE;
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pstart = argc;
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pend = argc;
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}
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/*
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* if there's a preposition,
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* find the iobj & dobj around it, if any
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*/
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if (pc.prep != PREP_NONE) {
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pc.prepstr = build_string(pend - pstart + 1, argv + pstart);
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pc.iobjstr = build_string(argc - (pend + 1), argv + (pend + 1));
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pc.iobj = match_object(user, pc.iobjstr);
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} else {
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pc.prepstr = str_dup("");
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pc.iobjstr = str_dup("");
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pc.iobj = NOTHING;
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}
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dlen = pstart - 1;
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if (dlen == 0) {
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pc.dobjstr = str_dup("");
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pc.dobj = NOTHING;
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} else {
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pc.dobjstr = build_string(dlen, argv + 1);
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pc.dobj = match_object(user, pc.dobjstr);
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}
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free_str(buf);
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return &pc;
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}
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void
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free_parsed_command(Parsed_Command * pc)
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{
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free_str(pc->verb);
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free_str(pc->argstr);
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free_var(pc->args);
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free_str(pc->dobjstr);
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free_str(pc->prepstr);
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free_str(pc->iobjstr);
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}
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/*
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* $Log$
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* Revision 2.2 1996/02/08 06:55:06 pavel
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* Updated copyright notice for 1996. Release 1.8.0beta1.
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*
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* Revision 2.1 1995/12/28 00:40:37 pavel
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* Fixed memory leak in freeing Parsed_Command structures.
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* Release 1.8.0alpha3.
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*
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* Revision 2.0 1995/11/30 04:29:31 pavel
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* New baseline version, corresponding to release 1.8.0alpha1.
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*
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* Revision 1.10 1992/10/23 23:03:47 pavel
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* Added copyright notice.
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*
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* Revision 1.9 1992/10/21 03:02:35 pavel
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* Converted to use new automatic configuration system.
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*
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* Revision 1.8 1992/10/17 20:49:22 pavel
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* Global rename of strdup->str_dup, strref->str_ref, vardup->var_dup, and
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* varref->var_ref.
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*
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* Revision 1.7 1992/09/14 17:30:26 pjames
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* Moved db_modification code to db modules.
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*
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* Revision 1.6 1992/08/31 22:32:16 pjames
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* Changed some `char *'s to `const char *' and fixed code accordingly.
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*
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* Revision 1.5 1992/08/28 16:15:47 pjames
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* Changed myfree(*, M_STRING) to free_str(*).
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* Changed some strref's to strdup.
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*
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* Revision 1.4 1992/08/20 23:49:12 pavel
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* Moved #define MAXARGS from config.h to here, renamed to MAXWORDS. Also
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* changed the file name from `parse_command.c' to `parse_cmd.c', to make it
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* easier to use on 14-character-file-name systems.
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*
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* Revision 1.3 1992/08/10 17:35:34 pjames
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* Added find_verb() which doesn't fill in a Parse_Info, just returns
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* information about the verb.
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*
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* Revision 1.2 1992/07/21 00:04:53 pavel
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* Added rcsid_<filename-root> declaration to hold the RCS ident. string.
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*
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* Revision 1.1 1992/07/20 23:23:12 pavel
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* Initial RCS-controlled version.
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*/
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