95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
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// /bin/dev/_diff.c
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// Finds the difference between two files.
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// This file is a part of the TMI distribution mudlib.
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// Please retain this header if you use this code.
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// Devised & Written by Douglas Reay (Pallando @ TMI, Ephemeral Dale, etc)
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// Version 1.0 92-11-28
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//
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// Watcher@TMI (93-04-10) changed it so the output is put through the
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// user's more pager system, and made the headlines stand out a bit better.
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// Pallando (93-05-28) Added this command to Dead Souls's mudlib.
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// Changed its name from "compare" to "diff"
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*/
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#include <lib.h>
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#include <message_class.h>
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inherit LIB_DAEMON;
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int sort( string mem, mixed arr )
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{
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return -1 == member_array( mem, arr );
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}
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mixed get_lines( string file_name )
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{
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string file;
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file_name = absolute_path( "cwd", file_name );
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switch( file_size( file_name ) )
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{
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case -2: { write( file_name + " is a directory.\n" ); return 0; }
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case -1: { write( file_name + " is not a file.\n" ); return 0; }
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}
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if( !master()-> valid_read( file_name,
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previous_object(), "diff" ) )
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{
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write( file_name + " : Permission denied.\n" );
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return 0;
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}
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file = read_file( file_name );
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if( !file )
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{
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write( file_name + " is empty.\n" );
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return 0;
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}
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return explode( file, "\n" );
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}
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int cmd( string a )
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{
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string output, file_name1, file_name2;
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string *lines1, *lines2;
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string *ONEnotTWO, *TWOnotONE;
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if( !a || 2 != sscanf( a, "%s %s", file_name1, file_name2 ) )
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{
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notify_fail( "Syntax: diff <file1> <file2>\n" );
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return 0;
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}
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lines1 = get_lines( file_name1 );
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lines2 = get_lines( file_name2 );
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if( !pointerp( lines1 ) || !pointerp( lines2 ) )
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{
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notify_fail( "No comparison made.\n" );
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return 0;
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}
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if( lines1 == lines2 )
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{
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write( file_name1 + " and " + file_name2 + " are the same file.\n" );
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return 1;
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}
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ONEnotTWO = filter( lines1, "sort", this_object(), lines2 );
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TWOnotONE = filter( lines2, "sort", this_object(), lines1 );
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if( ONEnotTWO == TWOnotONE )
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{
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write( file_name1 + " and " + file_name2 + " have the same lines.\n" );
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return 1;
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}
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output = "[In " + file_name1 + " but not in " + file_name2 + ":]\n" +
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implode( ONEnotTWO, "\n" ) + "\n" +
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"\n[In " + file_name2 + " but not in " + file_name1 + ":]\n" +
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implode( TWOnotONE, "\n" ) + "\n";
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this_player()->eventPage( explode(output, "\n"), MSG_SYSTEM | MSG_NOCOLOUR);
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return 1;
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}
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string GetHelp(){
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return ("Syntax: diff <file1> <file2>\n\n"
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"Reports the differences between two files.");
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}
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