be04d3a4f9
Remove artificial length limit on input. Enable multi-line display of input.
469 lines
11 KiB
C++
469 lines
11 KiB
C++
/*
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* This file is part of the DXX-Rebirth project <http://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*
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*/
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/*
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*
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* Command parsing and processing
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*
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*/
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#include <cstdarg>
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#include <map>
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#include <forward_list>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "dxxerror.h"
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#include "u_mem.h"
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#include "strutil.h"
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#include "inferno.h"
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#include "console.h"
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#include "cvar.h"
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#include "physfsx.h"
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#include "compiler-make_unique.h"
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#include "compiler-range_for.h"
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namespace {
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struct cmd_t
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{
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const char *name;
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cmd_handler_t function;
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const char *help_text;
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};
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/* The list of cmds */
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static std::map<const char *, std::unique_ptr<cmd_t>> cmd_list;
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#define ALIAS_NAME_MAX 32
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struct cmd_alias_t
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{
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char name[ALIAS_NAME_MAX];
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RAIIdmem<char[]> value;
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};
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}
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#define CMD_MAX_ALIASES 1024
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/* The list of aliases */
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static std::map<std::string, std::unique_ptr<cmd_alias_t>> cmd_alias_list;
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static cmd_t *cmd_findcommand(const char *cmd_name)
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{
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const auto i = cmd_list.find(cmd_name);
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return i == cmd_list.end() ? nullptr : i->second.get();
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}
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static cmd_alias_t *cmd_findalias(const char *alias_name )
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{
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const auto i = cmd_alias_list.find(alias_name);
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return i == cmd_alias_list.end() ? nullptr : i->second.get();
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}
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/* add a new console command */
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void cmd_addcommand(const char *cmd_name, cmd_handler_t cmd_func, const char *cmd_help_text)
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{
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const auto i = cmd_list.insert(std::make_pair(cmd_name, std::unique_ptr<cmd_t>{}));
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if (!i.second)
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{
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Int3();
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con_printf(CON_NORMAL, "command %s already exists, not adding", cmd_name);
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return;
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}
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auto cmd = (i.first->second = make_unique<cmd_t>()).get();
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/* create command, insert to hashtable */
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cmd->name = cmd_name;
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cmd->function = cmd_func;
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cmd->help_text = cmd_help_text;
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con_printf(CON_DEBUG, "cmd_addcommand: added %s", cmd->name);
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}
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namespace {
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struct cmd_queue_t
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{
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RAIIdmem<char[]> command_line;
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explicit cmd_queue_t(char *p) :
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command_line(p)
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{
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}
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};
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}
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/* The list of commands to be executed */
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static std::forward_list<cmd_queue_t> cmd_queue;
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/* execute a parsed command */
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static void cmd_execute(unsigned long argc, const char *const *const argv)
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{
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cmd_t *cmd;
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cmd_alias_t *alias;
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if ( (cmd = cmd_findcommand(argv[0])) )
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{
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con_printf(CON_DEBUG, "cmd_execute: executing %s", argv[0]);
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cmd->function(argc, argv);
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return;
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}
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if ( (alias = cmd_findalias(argv[0])) && alias->value )
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{
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con_printf(CON_DEBUG, "cmd_execute: pushing alias \"%s\": %s", alias->name, alias->value.get());
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cmd_insert(alias->value.get());
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return;
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}
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/* Otherwise */
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if (argc < 31)
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{ // set value of cvar
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const char *new_argv[32];
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int i;
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new_argv[0] = "set";
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for (i = 0; i < argc; i++)
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new_argv[i+1] = argv[i];
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cvar_cmd_set(argc + 1, new_argv);
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}
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}
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/* Parse an input string */
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static void cmd_parse(char *input)
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{
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char buffer[CMD_MAX_LENGTH];
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char *tokens[CMD_MAX_TOKENS];
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int num_tokens;
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uint_fast32_t i, l;
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Assert(input != NULL);
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/* Strip leading spaces */
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while( isspace(*input) ) { ++input; }
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strncpy( buffer, input, sizeof(buffer) );
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//printf("lead strip \"%s\"\n",buffer);
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l = strlen(buffer);
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/* If command is empty, give up */
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if (l==0) return;
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/* Strip trailing spaces */
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for (i=l-1; i>0 && isspace(buffer[i]); i--) ;
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buffer[i+1] = 0;
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//printf("trail strip \"%s\"\n",buffer);
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/* Split into tokens */
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l = strlen(buffer);
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num_tokens = 1;
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tokens[0] = buffer;
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for (i=1; i<l; i++) {
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if (buffer[i] == '"') {
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tokens[num_tokens - 1] = &buffer[++i];
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while (i < l && buffer[i] != '"')
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i++;
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buffer[i] = 0;
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continue;
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}
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if (isspace(buffer[i]) || buffer[i] == '=') {
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buffer[i] = 0;
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while (isspace(buffer[i+1]) && (i+1 < l)) i++;
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tokens[num_tokens++] = &buffer[i+1];
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}
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}
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/* Check for matching commands */
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cmd_execute(num_tokens, tokens);
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}
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static int cmd_queue_wait;
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int cmd_queue_process(void)
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{
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for (;;)
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{
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if (cmd_queue_wait)
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break;
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auto cmd = cmd_queue.begin();
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if (cmd == cmd_queue.end())
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break;
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auto command_line = std::move(cmd->command_line);
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cmd_queue.pop_front();
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con_printf(CON_DEBUG, "cmd_queue_process: processing %s", command_line.get());
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cmd_parse(command_line.get()); // Note, this may change the queue
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}
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if (cmd_queue_wait > 0) {
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cmd_queue_wait--;
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con_printf(CON_DEBUG, "cmd_queue_process: waiting");
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return 1;
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}
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return 0;
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}
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/* execute until there are no commands left */
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void cmd_queue_flush(void)
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{
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while (cmd_queue_process()) {
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}
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}
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/* Add some commands to the queue to be executed */
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void cmd_enqueue(int insert, const char *input)
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{
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std::forward_list<cmd_queue_t> l;
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char output[CMD_MAX_LENGTH];
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char *optr;
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auto before_end = [](std::forward_list<cmd_queue_t> &f) {
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for (auto i = f.before_begin();;)
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{
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auto j = i;
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if (++ i == f.end())
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return j;
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}
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};
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auto iter = before_end(l);
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while (*input) {
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optr = output;
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int quoted = 0;
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/* Strip leading spaces */
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while(isspace(*input) || *input == ';')
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input++;
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/* If command is empty, give up */
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if (! *input)
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continue;
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/* Find the end of this line (\n, ;, or nul) */
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do {
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if (!*input)
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break;
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if (*input == '"') {
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quoted = 1 - quoted;
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continue;
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} else if ( *input == '\n' || (!quoted && *input == ';') ) {
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input++;
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break;
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}
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} while ((*optr++ = *input++));
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*optr = 0;
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/* make a new queue item, add it to list */
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iter = l.emplace_after(iter, cmd_queue_t{d_strdup(output)});
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con_printf(CON_DEBUG, "cmd_enqueue: adding %s", output);
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}
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auto after = insert
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/* add our list to the head of the main list */
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? (con_printf(CON_DEBUG, "cmd_enqueue: added to front of list"), cmd_queue.before_begin())
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/* add our list to the tail of the main list */
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: (con_printf(CON_DEBUG, "cmd_enqueue: added to back of list"), before_end(cmd_queue))
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;
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cmd_queue.splice_after(after, std::move(l));
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}
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void cmd_enqueuef(int insert, const char *fmt, ...)
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{
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va_list arglist;
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char buf[CMD_MAX_LENGTH];
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va_start (arglist, fmt);
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vsnprintf(buf, sizeof(buf), fmt, arglist);
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va_end (arglist);
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cmd_enqueue(insert, buf);
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}
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/* Attempt to autocomplete an input string */
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const char *cmd_complete(const char *input)
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{
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uint_fast32_t len = strlen(input);
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if (!len)
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return NULL;
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range_for (const auto &i, cmd_list)
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if (!d_strnicmp(input, i.first, len))
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return i.first;
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range_for (const auto &i, cmd_alias_list)
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if (!d_strnicmp(input, i.first.c_str(), len))
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return i.first.c_str();
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return cvar_complete(input);
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}
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/* alias */
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static void cmd_alias(unsigned long argc, const char *const *const argv)
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{
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char buf[CMD_MAX_LENGTH] = "";
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if (argc < 2) {
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con_printf(CON_NORMAL, "aliases:");
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range_for (const auto &i, cmd_alias_list)
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con_printf(CON_NORMAL, "%s: %s", i.first.c_str(), i.second->value.get());
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return;
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}
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if (argc == 2) {
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cmd_alias_t *alias;
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if ( (alias = cmd_findalias(argv[1])) && alias->value )
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{
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con_printf(CON_NORMAL, "%s: %s", alias->name, alias->value.get());
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return;
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}
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con_printf(CON_NORMAL, "alias: %s not found", argv[1]);
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return;
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}
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for (int i = 2; i < argc; i++) {
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if (i > 2)
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strncat(buf, " ", sizeof(buf) - strlen(buf) - 1);
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strncat(buf, argv[i], sizeof(buf) - strlen(buf) - 1);
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}
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const auto i = cmd_alias_list.insert(std::make_pair(argv[1], std::unique_ptr<cmd_alias_t>{}));
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auto alias = i.first->second.get();
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if (i.second)
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{
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alias = (i.first->second = make_unique<cmd_alias_t>()).get();
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strncpy(alias->name, argv[1], sizeof(alias->name));
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}
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alias->value.reset(d_strdup(buf));
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}
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/* unalias */
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static void cmd_unalias(unsigned long argc, const char *const *const argv)
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{
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if (argc < 2 || argc > 2) {
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cmd_insertf("help %s", argv[0]);
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return;
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}
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const char *alias_name = argv[1];
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const auto alias = cmd_alias_list.find(alias_name);
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if (alias == cmd_alias_list.end())
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{
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con_printf(CON_NORMAL, "unalias: %s not found", alias_name);
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return;
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}
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cmd_alias_list.erase(alias);
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}
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/* echo to console */
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static void cmd_echo(unsigned long argc, const char *const *const argv)
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{
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char buf[CMD_MAX_LENGTH] = "";
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int i;
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for (i = 1; i < argc; i++) {
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if (i > 1)
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strncat(buf, " ", sizeof(buf) - strlen(buf) - 1);
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strncat(buf, argv[i], sizeof(buf) - strlen(buf) - 1);
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}
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con_puts(CON_NORMAL, buf);
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}
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/* execute script */
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static void cmd_exec(unsigned long argc, const char *const *const argv)
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{
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PHYSFSX_gets_line_t<CMD_MAX_LENGTH> line;
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if (argc < 2 || argc > 2) {
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cmd_insertf("help %s", argv[0]);
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return;
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}
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auto f = PHYSFSX_openReadBuffered(argv[1]);
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if (!f) {
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con_printf(CON_CRITICAL, "exec: %s not found", argv[1]);
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return;
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}
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std::forward_list<cmd_queue_t> l;
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auto i = l.before_begin();
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while (PHYSFSX_fgets(line, f)) {
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/* make a new queue item, add it to list */
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i = l.emplace_after(i, cmd_queue_t{d_strdup(line)});
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con_printf(CON_DEBUG, "cmd_exec: adding %s", static_cast<const char *>(line));
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}
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/* add our list to the head of the main list */
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con_printf(CON_DEBUG, "cmd_exec: added to front of list");
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cmd_queue.splice_after(cmd_queue.before_begin(), std::move(l));
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}
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/* get help */
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static void cmd_help(unsigned long argc, const char *const *const argv)
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{
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cmd_t *cmd;
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if (argc > 2) {
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cmd_insertf("help %s", argv[0]);
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return;
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}
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if (argc < 2) {
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con_printf(CON_NORMAL, "Available commands:");
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range_for (const auto &i, cmd_list)
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con_printf(CON_NORMAL, " %s", i.first);
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return;
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}
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cmd = cmd_findcommand(argv[1]);
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if (!cmd) {
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con_printf(CON_URGENT, "Command %s not found", argv[1]);
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return;
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}
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if (!cmd->help_text) {
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con_printf(CON_NORMAL, "%s: no help found", argv[1]);
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return;
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}
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con_puts(CON_NORMAL, cmd->help_text);
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}
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/* execute script */
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static void cmd_wait(unsigned long argc, const char *const *const argv)
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{
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if (argc > 2) {
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cmd_insertf("help %s", argv[0]);
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return;
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}
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if (argc < 2)
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cmd_queue_wait = 1;
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else
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cmd_queue_wait = atoi(argv[1]);
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}
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void cmd_init(void)
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{
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cmd_addcommand("alias", cmd_alias, "alias <name> <commands>\n" " define <name> as an alias for <commands>\n"
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"alias <name>\n" " show the current definition of <name>\n"
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"alias\n" " show all defined aliases");
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cmd_addcommand("unalias", cmd_unalias, "unalias <name>\n" " undefine the alias <name>");
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cmd_addcommand("echo", cmd_echo, "echo [text]\n" " write <text> to the console");
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cmd_addcommand("exec", cmd_exec, "exec <file>\n" " execute <file>");
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cmd_addcommand("help", cmd_help, "help [command]\n" " get help for <command>, or list all commands if not specified.");
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cmd_addcommand("wait", cmd_wait, "usage: wait [n]\n" " stop processing commands, resume in <n> cycles (default 1)");
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}
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