mirror of
https://github.com/tmux/tmux.git
synced 2025-09-27 13:38:34 +00:00
Sync OpenBSD patchset 829:
Clean up and simplify tmux command argument parsing. Originally, tmux commands were parsed in the client process into a struct with the command data which was then serialised and sent to the server to be executed. The parsing was later moved into the server (an argv was sent from the client), but the parse step and intermediate struct was kept. This change removes that struct and the separate parse step. Argument parsing and printing is now common to all commands (in arguments.c) with each command left with just an optional check function (to validate the arguments at parse time), the exec function and a function to set up any key bindings (renamed from the old init function). This is overall more simple and consistent. There should be no changes to any commands behaviour or syntax although as this touches every command please watch for any unexpected changes.
This commit is contained in:
Tiago Cunha
414
cmd-generic.c
414
cmd-generic.c
@@ -1,414 +0,0 @@
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/* $Id: cmd-generic.c,v 1.39 2010-12-30 22:39:49 tcunha Exp $ */
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/*
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* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include "tmux.h"
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int cmd_getopt(int, char **, const char *, const char *);
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int cmd_parse_flags(int, const char *, uint64_t *);
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size_t cmd_print_flags(char *, size_t, size_t, uint64_t);
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int cmd_fill_argument(int, char **, char **, int, char **);
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size_t
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cmd_prarg(char *buf, size_t len, const char *prefix, char *arg)
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{
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if (strchr(arg, ' ') != NULL)
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return (xsnprintf(buf, len, "%s\"%s\"", prefix, arg));
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return (xsnprintf(buf, len, "%s%s", prefix, arg));
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}
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/* Append two flag strings together and call getopt. */
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int
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cmd_getopt(int argc, char **argv, const char *flagstr, const char *chflagstr)
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{
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char tmp[BUFSIZ];
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if (strlcpy(tmp, flagstr, sizeof tmp) >= sizeof tmp)
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fatalx("strlcpy overflow");
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if (strlcat(tmp, chflagstr, sizeof tmp) >= sizeof tmp)
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fatalx("strlcat overflow");
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return (getopt(argc, argv, tmp));
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}
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/* Return if flag character is set. */
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int
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cmd_check_flag(uint64_t chflags, int flag)
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{
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if (flag >= 'A' && flag <= 'Z')
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flag = 26 + flag - 'A';
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else if (flag >= 'a' && flag <= 'z')
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flag = flag - 'a';
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else
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return (0);
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return ((chflags & (1ULL << flag)) != 0);
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}
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/* Set flag character. */
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void
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cmd_set_flag(uint64_t *chflags, int flag)
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{
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if (flag >= 'A' && flag <= 'Z')
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flag = 26 + flag - 'A';
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else if (flag >= 'a' && flag <= 'z')
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flag = flag - 'a';
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else
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return;
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(*chflags) |= (1ULL << flag);
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}
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/* If this option is expected, set it in chflags, otherwise return -1. */
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int
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cmd_parse_flags(int opt, const char *chflagstr, uint64_t *chflags)
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{
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if (strchr(chflagstr, opt) == NULL)
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return (-1);
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cmd_set_flag(chflags, opt);
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return (0);
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}
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/* Print the flags present in chflags. */
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size_t
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cmd_print_flags(char *buf, size_t len, size_t off, uint64_t chflags)
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{
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u_char ch;
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size_t boff = off;
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if (chflags == 0)
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return (0);
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off += xsnprintf(buf + off, len - off, " -");
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for (ch = 0; ch < 26; ch++) {
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if (cmd_check_flag(chflags, 'a' + ch))
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off += xsnprintf(buf + off, len - off, "%c", 'a' + ch);
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if (cmd_check_flag(chflags, 'A' + ch))
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off += xsnprintf(buf + off, len - off, "%c", 'A' + ch);
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}
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return (off - boff);
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}
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int
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cmd_fill_argument(int flags, char **arg, char **arg2, int argc, char **argv)
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{
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*arg = NULL;
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*arg2 = NULL;
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if (flags & CMD_ARG1) {
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if (argc != 1)
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return (-1);
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*arg = xstrdup(argv[0]);
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return (0);
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}
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if (flags & CMD_ARG01) {
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if (argc != 0 && argc != 1)
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return (-1);
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if (argc == 1)
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*arg = xstrdup(argv[0]);
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return (0);
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}
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if (flags & CMD_ARG2) {
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if (argc != 2)
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return (-1);
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*arg = xstrdup(argv[0]);
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*arg2 = xstrdup(argv[1]);
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return (0);
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}
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if (flags & CMD_ARG12) {
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if (argc != 1 && argc != 2)
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return (-1);
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*arg = xstrdup(argv[0]);
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if (argc == 2)
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*arg2 = xstrdup(argv[1]);
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return (0);
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}
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if (argc != 0)
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return (-1);
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return (0);
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}
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/* ARGSUSED */
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void
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cmd_target_init(struct cmd *self, unused int key)
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{
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struct cmd_target_data *data;
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self->data = data = xmalloc(sizeof *data);
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data->chflags = 0;
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data->target = NULL;
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data->arg = NULL;
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data->arg2 = NULL;
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}
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int
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cmd_target_parse(struct cmd *self, int argc, char **argv, char **cause)
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{
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struct cmd_target_data *data;
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const struct cmd_entry *entry = self->entry;
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int opt;
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/* Don't use the entry version since it may be dependent on key. */
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cmd_target_init(self, 0);
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data = self->data;
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while ((opt = cmd_getopt(argc, argv, "t:", entry->chflags)) != -1) {
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if (cmd_parse_flags(opt, entry->chflags, &data->chflags) == 0)
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continue;
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switch (opt) {
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case 't':
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if (data->target == NULL)
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data->target = xstrdup(optarg);
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break;
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default:
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goto usage;
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}
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}
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argc -= optind;
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argv += optind;
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if (cmd_fill_argument(
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self->entry->flags, &data->arg, &data->arg2, argc, argv) != 0)
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goto usage;
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return (0);
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usage:
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xasprintf(cause, "usage: %s %s", self->entry->name, self->entry->usage);
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self->entry->free(self);
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return (-1);
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}
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void
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cmd_target_free(struct cmd *self)
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{
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struct cmd_target_data *data = self->data;
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if (data->target != NULL)
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xfree(data->target);
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if (data->arg != NULL)
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xfree(data->arg);
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if (data->arg2 != NULL)
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xfree(data->arg2);
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xfree(data);
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}
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size_t
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cmd_target_print(struct cmd *self, char *buf, size_t len)
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{
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struct cmd_target_data *data = self->data;
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size_t off = 0;
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off += xsnprintf(buf, len, "%s", self->entry->name);
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if (data == NULL)
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return (off);
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off += cmd_print_flags(buf, len, off, data->chflags);
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if (off < len && data->target != NULL)
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off += cmd_prarg(buf + off, len - off, " -t ", data->target);
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if (off < len && data->arg != NULL)
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off += cmd_prarg(buf + off, len - off, " ", data->arg);
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if (off < len && data->arg2 != NULL)
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off += cmd_prarg(buf + off, len - off, " ", data->arg2);
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return (off);
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}
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/* ARGSUSED */
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void
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cmd_srcdst_init(struct cmd *self, unused int key)
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{
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struct cmd_srcdst_data *data;
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self->data = data = xmalloc(sizeof *data);
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data->chflags = 0;
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data->src = NULL;
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data->dst = NULL;
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data->arg = NULL;
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data->arg2 = NULL;
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}
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int
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cmd_srcdst_parse(struct cmd *self, int argc, char **argv, char **cause)
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{
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struct cmd_srcdst_data *data;
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const struct cmd_entry *entry = self->entry;
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int opt;
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cmd_srcdst_init(self, 0);
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data = self->data;
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while ((opt = cmd_getopt(argc, argv, "s:t:", entry->chflags)) != -1) {
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if (cmd_parse_flags(opt, entry->chflags, &data->chflags) == 0)
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continue;
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switch (opt) {
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case 's':
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if (data->src == NULL)
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data->src = xstrdup(optarg);
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break;
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case 't':
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if (data->dst == NULL)
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data->dst = xstrdup(optarg);
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break;
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default:
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goto usage;
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}
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}
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argc -= optind;
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argv += optind;
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if (cmd_fill_argument(
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self->entry->flags, &data->arg, &data->arg2, argc, argv) != 0)
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goto usage;
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return (0);
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usage:
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xasprintf(cause, "usage: %s %s", self->entry->name, self->entry->usage);
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self->entry->free(self);
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return (-1);
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}
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void
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cmd_srcdst_free(struct cmd *self)
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{
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struct cmd_srcdst_data *data = self->data;
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if (data->src != NULL)
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xfree(data->src);
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if (data->dst != NULL)
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xfree(data->dst);
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if (data->arg != NULL)
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xfree(data->arg);
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if (data->arg2 != NULL)
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xfree(data->arg2);
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xfree(data);
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}
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size_t
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cmd_srcdst_print(struct cmd *self, char *buf, size_t len)
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{
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struct cmd_srcdst_data *data = self->data;
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size_t off = 0;
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off += xsnprintf(buf, len, "%s", self->entry->name);
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if (data == NULL)
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return (off);
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off += cmd_print_flags(buf, len, off, data->chflags);
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if (off < len && data->src != NULL)
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off += xsnprintf(buf + off, len - off, " -s %s", data->src);
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if (off < len && data->dst != NULL)
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off += xsnprintf(buf + off, len - off, " -t %s", data->dst);
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if (off < len && data->arg != NULL)
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off += cmd_prarg(buf + off, len - off, " ", data->arg);
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if (off < len && data->arg2 != NULL)
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off += cmd_prarg(buf + off, len - off, " ", data->arg2);
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return (off);
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}
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/* ARGSUSED */
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void
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cmd_buffer_init(struct cmd *self, unused int key)
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{
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struct cmd_buffer_data *data;
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self->data = data = xmalloc(sizeof *data);
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data->chflags = 0;
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data->buffer = -1;
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data->arg = NULL;
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data->arg2 = NULL;
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}
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int
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cmd_buffer_parse(struct cmd *self, int argc, char **argv, char **cause)
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{
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struct cmd_buffer_data *data;
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const struct cmd_entry *entry = self->entry;
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int opt, n;
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const char *errstr;
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cmd_buffer_init(self, 0);
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data = self->data;
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while ((opt = cmd_getopt(argc, argv, "b:", entry->chflags)) != -1) {
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if (cmd_parse_flags(opt, entry->chflags, &data->chflags) == 0)
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continue;
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switch (opt) {
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case 'b':
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if (data->buffer == -1) {
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n = strtonum(optarg, 0, INT_MAX, &errstr);
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if (errstr != NULL) {
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xasprintf(cause, "buffer %s", errstr);
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goto error;
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}
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data->buffer = n;
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}
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break;
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default:
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goto usage;
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}
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}
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argc -= optind;
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argv += optind;
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if (cmd_fill_argument(
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self->entry->flags, &data->arg, &data->arg2, argc, argv) != 0)
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goto usage;
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return (0);
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usage:
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xasprintf(cause, "usage: %s %s", self->entry->name, self->entry->usage);
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error:
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self->entry->free(self);
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return (-1);
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}
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void
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cmd_buffer_free(struct cmd *self)
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{
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struct cmd_buffer_data *data = self->data;
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if (data->arg != NULL)
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xfree(data->arg);
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if (data->arg2 != NULL)
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xfree(data->arg2);
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xfree(data);
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}
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size_t
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cmd_buffer_print(struct cmd *self, char *buf, size_t len)
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{
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struct cmd_buffer_data *data = self->data;
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size_t off = 0;
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off += xsnprintf(buf, len, "%s", self->entry->name);
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if (data == NULL)
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return (off);
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off += cmd_print_flags(buf, len, off, data->chflags);
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if (off < len && data->buffer != -1)
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off += xsnprintf(buf + off, len - off, " -b %d", data->buffer);
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if (off < len && data->arg != NULL)
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off += cmd_prarg(buf + off, len - off, " ", data->arg);
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if (off < len && data->arg2 != NULL)
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off += cmd_prarg(buf + off, len - off, " ", data->arg2);
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return (off);
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}
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