Comms refactor (prerequisite of libproxmark work) (#371)

[proxmark3-svn] / client / cmdparser.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Command parser
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ui.h"
#include "cmdparser.h"
#include "proxmark3.h"
#include "comms.h"


void CmdsHelp(const command_t Commands[])
{
  if (Commands[0].Name == NULL)
    return;
  int i = 0;
  while (Commands[i].Name)
  {
    if (!IsOffline() || Commands[i].Offline)
       PrintAndLog("%-16s %s", Commands[i].Name, Commands[i].Help);
    ++i;
  }
}


int CmdsParse(const command_t Commands[], const char *Cmd)
{
	if(strcmp( Cmd, "XX_internal_command_dump_XX") == 0)
	{// Help dump children
		dumpCommandsRecursive(Commands, 0);
		return 0;
	}
	if(strcmp( Cmd, "XX_internal_command_dump_markdown_XX") == 0)
	{// Markdown help dump children
		dumpCommandsRecursive(Commands, 1);
		return 0;
	}
	char cmd_name[32];
	int len = 0;
	memset(cmd_name, 0, 32);
	sscanf(Cmd, "%31s%n", cmd_name, &len);
	int i = 0;
	while (Commands[i].Name && strcmp(Commands[i].Name, cmd_name))
		++i;

	/* try to find exactly one prefix-match */
	if(!Commands[i].Name) {
		int last_match = 0;
		int matches = 0;

		for(i=0;Commands[i].Name;i++) {
			if( !strncmp(Commands[i].Name, cmd_name, strlen(cmd_name)) ) {
				last_match = i;
				matches++;
			}
		}
		if(matches == 1) i=last_match;
	}

	if (Commands[i].Name) {
		while (Cmd[len] == ' ')
			++len;
	return Commands[i].Parse(Cmd + len);
	} else {
		// show help for selected hierarchy or if command not recognised
		CmdsHelp(Commands);
	}

	return 0;
}

char pparent[512] = {0};
char *parent = pparent;

void dumpCommandsRecursive(const command_t cmds[], int markdown)
{
  if (cmds[0].Name == NULL)
    return;

  int i = 0;
  int w_cmd=25;
  int w_off=8;
  // First, dump all single commands, which are not a container for 
  // other commands
  if (markdown) {
    printf("|%-*s|%-*s|%s\n",w_cmd,"command",w_off,"offline","description");
    printf("|%-*s|%-*s|%s\n",w_cmd,"-------",w_off,"-------","-----------");
  } else {
    printf("%-*s|%-*s|%s\n",w_cmd,"command",w_off,"offline","description");
    printf("%-*s|%-*s|%s\n",w_cmd,"-------",w_off,"-------","-----------");
  }

  while (cmds[i].Name)
  {
    char* cmd_offline = "N";
    if(cmds[i].Help[0] == '{' && ++i) continue;

    if ( cmds[i].Offline) cmd_offline = "Y";
    if (markdown)
      printf("|`%s%-*s`|%-*s|`%s`\n", parent, w_cmd-(int)strlen(parent)-2, cmds[i].Name, w_off, cmd_offline, cmds[i].Help);
    else
      printf("%s%-*s|%-*s|%s\n", parent, w_cmd-(int)strlen(parent), cmds[i].Name, w_off, cmd_offline, cmds[i].Help);
    ++i;
  }
  printf("\n\n");
  i=0;
  // Then, print the categories. These will go into subsections with their own tables

  while (cmds[i].Name)
  {
    if(cmds[i].Help[0] != '{' && ++i)  continue;

    printf("### %s%s\n\n %s\n\n", parent, cmds[i].Name, cmds[i].Help);

    char currentparent[512] = {0};
    snprintf(currentparent, sizeof currentparent, "%s%s ", parent, cmds[i].Name);
    char *old_parent = parent;
    parent = currentparent;
    // This is what causes the recursion, since commands Parse-implementation
    // in turn calls the CmdsParse above. 
    if (markdown)
      cmds[i].Parse("XX_internal_command_dump_markdown_XX");
    else
      cmds[i].Parse("XX_internal_command_dump_XX");
    parent = old_parent;
    ++i;
  }

}