mkentry.c

1984-1993模糊 C 源代码竞赛.zip 非常的好,不过这是DOS格式,要用UE去打开.

/* @(#)mkentry.c	1.20 3/1/92 16:13:00 */
/*
 * mkentry - make an International Obfuscated C Code Contest entry
 *
 * usage:
 *	mkentry -r remarks -b build -p prog.c -o ioccc.entry
 *
 *	-r remarks		file with remarks about the entry
 *	-b build		file containing how prog.c should be built
 *	-p prog.c		the obfuscated program source file
 *	-o ioccc.entry		ioccc entry output file
 *
 * compile by:
 *	cc mkentry.c -o mkentry
 */
/*
 * Copyright (c) 1992, Landon Curt Noll & Larry Bassel.
 * All Rights Reserved.  Permission for personal, education or non-profit use 
 * is granted provided this this copyright and notice are included in its 
 * entirety and remains unaltered.  All other uses must receive prior 
 * permission in writing from both Landon Curt Noll and Larry Bassel.
 */
/*
 * Placed in the public domain by Landon Curt Noll, 1992.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */
/*
 * WARNING:
 *
 * This program attempts to implement the IOCCC rules.  Every attempt
 * has been made to make sure that this program produces an entry that
 * conforms to the contest rules.  In all cases, where this program
 * differs from the contest rules, the contest rules will be used.  Be
 * sure to check with the contest rules before submitting an entry.
 *
 * Send questions or comments (but not entries) about the contest, to:
 *
 *	...!{sun,pacbell,uunet,pyramid}!hoptoad!judges
 *	[e-mail]
 *
 * The rules and the guidelines may (and often do) change from year to
 * year.  You should be sure you have the current rules and guidelines
 * prior to submitting entries.  The IOCCC rules, guidelines and mkentry
 * program may be obtained from the judges using the Email address above.
 * Please use the following subject when sending in your request:
 *
 *	send rules
 *
 * Because contest rules change from year to year, one should only use this
 * program for the year that it was intended.  Be sure that the RULE_YEAR
 * define below matches this current year.
 */

#include <stdio.h>
#include <ctype.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>

/* logic */
#ifndef TRUE
# define TRUE 1
#endif /* TRUE */
#ifndef FALSE
# define FALSE 0
#endif /* FALSE */
#define EOF_OK TRUE
#define EOF_NOT_OK FALSE

/* global limits */
#define RULE_YEAR 1992		/* NOTE: should match the current year */
#define START_DATE "1Mar92 0:00 UTC"	/* first confirmation received */
#define MAX_COL 79		/* max column a line should hit */
#define MAX_BUILD_SIZE 256	/* max how to build size */
#define MAX_PROGRAM_SIZE 3217	/* max program source size */
#define MAX_PROGRAM_SIZE2 1536	/* max program source size not counting
				   whitespace and {}; not followed by
				   whitespace or EOF */
#define MAX_TITLE_LEN 10	/* max chars in the title */
#define MAX_ENTRY_LEN 1		/* max length in the entry input line */
#define MAX_ENTRY 8		/* max number of entries per person per year */
#define MAX_FILE_LEN 1024	/* max filename length for a info file */

/* where to send entries */
#define ENTRY_ADDR1 "...!{apple,pyramid,sun,uunet}!hoptoad!obfuscate"
#define ENTRY_ADDR2 "[e-mail]"

/* uuencode process - assumes ASCII */
#define UUENCODE(c) (((c)=='\0') ? '`' : (((c)&0x3f)+' '))
#define UUENCODE_LEN 45		/* max uuencode chunk size */
#define UUINFO_MODE 0444	/* mode of an info file's uuencode file */
#define UUBUILD_MODE 0444	/* mode of the build file's uuencode file */
#define UUBUILD_NAME "build"	/* name for the build file's uuencode file */
#define UUPROG_MODE 0444	/* mode of the program's uuencode file */
#define UUPROG_NAME "prog.c"	/* name for the program's uuencode file */

/* global declarations */
char *program;		/* our name */
long start_time;		/* the startup time */

/* forward declarations */
void parse_args();
void usage();
FILE *open_remark();
FILE *open_build();
FILE *open_program();
FILE *open_output();
void output_entry();
void output_remark();
void output_author();
void output_info();
void output_build();
void output_program();
void output_end();
int get_line();
void output_till_dot();
int col_len();
void check_io();
void uuencode();

main(argc, argv)
    int argc;		/* arg count */
    char **argv;	/* the args */
{
    FILE *remark=NULL;	/* open remarks stream */
    FILE *build=NULL;	/* open build file stream */
    FILE *prog=NULL;	/* open program stream */
    FILE *output=NULL;	/* open output stream */
    char *rname=NULL;	/* file with remarks about the entry */
    char *bname=NULL;	/* file containing how prog.c should be built */
    char *pname=NULL;	/* the obfuscated program source file */
    char *oname=NULL;	/* ioccc entry output file */
    struct tm *tm;	/* startup time structure */

    /*
     * check on the year
     */
    start_time = time((long *)0);
    tm = gmtime(&start_time);
    if (tm->tm_year != RULE_YEAR-1900) {
	fprintf(stderr,
	    "%s: WARNING: this program applies to %d, which differ from %d\n\n",
	    argv[0], RULE_YEAR, 1900+tm->tm_year);
    }

    /*
     * parse the command line args
     */
    parse_args(argc, argv, &rname, &bname, &pname, &oname);

    /*
     * open/check the input and output files
     *
     * We open and truncate the output file first, in case it is the same
     * as one of the input files.
     */
    output = open_output(oname);
    remark = open_remark(rname);
    build = open_build(bname);
    prog = open_program(pname);
    if (output==NULL || remark==NULL || build==NULL || prog==NULL) {
	exit(1);
    }

    /*
     * output each section
     */
    output_entry(output, oname);
    output_remark(output, oname, remark, rname);
    output_author(output, oname);
    output_info(output, oname);
    output_build(output, oname, build, bname);
    output_program(output, oname, prog, pname);
    output_end(output, oname);

    /* 
     * flush the output 
     */
    if (fflush(output) == EOF) {
	fprintf(stderr, "%s: flush error in %s: ", program, oname);
	perror("");
	exit(2);
    }

    /*
     * final words
     */
    printf("\nYour entry can be found in %s.  You should check this file\n", 
	oname);
    printf("correct any problems and verify that the uudecode utility will\n");
    printf("correctly decode your build file and program.\n\n");
    printf("This program has been provided as a guide for submitters.  In\n");
    printf("cases where it conflicts with the rules, the rules shall apply.\n");
    printf("It is your responsibility to ensure that your entry conforms to\n");
    printf("the current rules.\n\n");
    printf("Email your entries to:\n");
    printf("\t%s\n", ENTRY_ADDR1);
    printf("\t%s\n\n", ENTRY_ADDR2);
    printf("Please use the following subject when you Email your entry:\n");
    printf("\tioccc entry\n\n");
    /* all done */
    exit(0);
}

/*
 * parse_args - parse the command line args
 *
 * Given the command line args, this function parses them and sets the
 * required name flags.  This function will return only if the command
 * line syntax is correct.
 */
void
parse_args(argc, argv, rname, bname, pname, oname)
    int argc;		/* arg count */
    char **argv;	/* the args */
    char **rname;	/* file with remarks about the entry */
    char **bname;	/* file containing how prog.c should be built */
    char **pname;	/* the obfuscated program source file */
    char **oname;	/* ioccc entry output file */
{
    char *optarg;	/* -flag option operand */
    int flagname;	/* the name of the -flag */
    int i;

    /*
     * Not everyone has getopt, so we must parse args by hand.
     */
    program = argv[0];
    for (i=1; i < argc; ++i) {

	/* determine the flagname */
	if (argv[i][0] != '-') {
	    usage(1);
	    /*NOTREACHED*/
	}
	flagname = (int)argv[i][1];

	/* determine the flag's operand */
	if (flagname != '\0' && argv[i][2] != '\0') {
	    optarg = &argv[i][2];
	} else {
	    if (i+1 >= argc) {
		usage(2);
		/*NOTREACHED*/
	    } else {
		optarg = argv[++i];
	    }
	}

	/* save the flag's operand in the correct global variable */
	switch (flagname) {
	case 'r':
	    *rname = optarg;
	    break;
	case 'b':
	    *bname = optarg;
	    break;
	case 'p':
	    *pname = optarg;
	    break;
	case 'o':
	    *oname = optarg;
	    break;
	default:
	    usage(3);
	    /*NOTREACHED*/
	}
    }

    /*
     * verify that we have all of the required flags
     */
    if (*rname == NULL || *bname == NULL || *pname == NULL || *oname == NULL) {
	usage(4);
	/*NOTREACHED*/
    }
    return;
}

/*
 * usage - print a usage message and exit
 *
 * This function does not return.
 */
void
usage(exitval)
    int exitval;		/* exit with this value */
{
    fprintf(stderr,
	"usage: %s -r remarks -b build -p prog.c -o ioccc.entry\n\n", program);
    fprintf(stderr, "\t-r remarks\tfile with remarks about the entry\n");
    fprintf(stderr, "\t-b build\tfile containing how prog.c should be built\n");
    fprintf(stderr, "\t-p prog.c\tthe obfuscated program source file\n");
    fprintf(stderr, "\t-o ioccc.entry\tioccc entry output file\n");
    exit(exitval);
}

/*
 * open_remark - open/check the remark file
 *
 * The remark file should be indented by 4 spaces, and should not extend 
 * beyond column MAX_COL.  These are not requirements, so we only warn.
 *
 * This function returns NULL on I/O or format error.
 */
FILE *
open_remark(filename)
    char *filename;
{
    FILE *stream;		/* the opened file stream */
    char buf[BUFSIZ+1];		/* input buffer */
    int toolong=0;		/* number of lines that are too long */
    int non_indent=0;		/* number of lines not indented by 4 spaces */

    /*
     * open the remark input file
     */
    stream = fopen(filename, "r");
    if (stream == NULL) {
	fprintf(stderr, "%s: cannot open remark file: %s: ",
	    program, filename);
	perror("");
	return(NULL);
    }

    /*
     * look at each line
     */
    while (fgets(buf, BUFSIZ, stream) != NULL) {

	/* count lines that do not start with 4 spaces */
	if (buf[0] != '\n' && strncmp(buf, "    ", 4) != 0) {
	    ++non_indent;
	}

	/* count long lines */
	if (col_len(buf) > MAX_COL) {
	    /* found a line that is too long */
	    ++toolong;
	}
    }

    /* watch for I/O errors */
    check_io(stream, filename, EOF_OK);

    /* note long lines if needed */
    if (toolong > 0) {
	fprintf(stderr,
	    "%s: WARNING: %d line(s) from %s extend beyond the 80th column\n",
	    program, toolong, filename);
	fprintf(stderr,
	    "%s:          This is ok, but it would be nice to avoid\n\n",
	    program);
    }

    /* note non-indented lines, if needed */
    if (non_indent > 0) {
	fprintf(stderr,
	    "%s: WARNING: %d line(s) from %s are not indented by 4 spaces\n",
	    program, non_indent, filename);
	fprintf(stderr,
	    "%s:          This is ok, but it would be nice to avoid\n\n",
	    program);
    }

    /* return the open file */
    rewind(stream);
    return(stream);
}

/*
 * open_build - open/check the build file
 *
 * The how to build file must not be longer than MAX_BUILD_SIZE bytes.
 *
 * This function returns NULL on I/O or size error.
 */
FILE *
open_build(filename)
    char *filename;
{
    FILE *stream;		/* the opened file stream */
    struct stat statbuf;	/* the status of the open file */

    /*
     * open the how to build input file
     */
    stream = fopen(filename, "r");
    if (stream == NULL) {
	fprintf(stderr, "%s: cannot open how to build file: %s: ",
	    program, filename);
	perror("");
	return(NULL);
    }