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