#ifndef LINT
/* derived from: zoo.c 2.24 88/01/29 00:55:09 */
static char sccsid[]="$Id: zoo.c,v 1.21 91/07/09 02:36:40 dhesi Exp $";
#endif /* LINT */

#if 0
#define TRACEI(item)	printf("line %d: %s= %d\n", __LINE__, #item, item)
#define TRACES(item)	printf("line %d: %s= [%s]\n", __LINE__, #item, item)
#endif

extern char version[];

/*
Copyright (C) 1986, 1987 Rahul Dhesi -- All rights reserved
(C) Copyright 1988 Rahul Dhesi -- All rights reserved
(C) Copyright 1991 Rahul Dhesi -- All rights reserved
*/
#include "options.h"
#include "zooio.h"
#include "various.h"

#include "zoo.h"
#include "zoofns.h"

#include "errors.i"
#include "zoomem.h"

static void ms_help();
static void wait_return();

#ifdef TRACE_IO
int verbose = 0;
#endif

int instr PARMS ((char *, char *));

char *out_buf_adr;      /* points to memory allocated for output buffer(s) */
char *in_buf_adr;       /* points to memory allocated for input buffer */

/* static declarations */
int quiet = 0;             /* whether to be quiet */
int next_arg = FIRST_ARG; /* filenames start at this position */
int arg_count;          /* count of arguments supplied to program */
char **arg_vector;      /* vector of arguments supplied to program */

main(argc,argv)
register int argc;
register char **argv;
{
   char *zooname;          /* synonym for argv[2] -- to make life easier */
#ifndef OOZ
   static char incorrect_args[] = "Incorrect number of arguments.\n";
   int filecount;          /* how many filespecs supplied */
#endif /* OOZ */

#ifdef OOZ
#else
/* else not OOZ */
      static char usage[] = "Usage: zoo {acDeglLPTuUvx}[aAcCdEfInmMNoOpPqu1:/.@n] archive file\n(\"zoo h\" for help, \"zoo H\" for extended help)\n";
      static char nov_usage[] =
          "\nNovice usage:  zoo -cmd archive[.zoo] file...  where -cmd is one of these:\n";
      char *option;

      static char nov_cmds[] =
         /* ADD=0EXT=5    MOV=14TES=20PRI=26 DEL=33  LIS=41UPD=47  FRE=55   COMMENT=64 */
           "-add -extract -move -test -print -delete -list -update -freshen -comment\n";

#ifdef NOENUM
#define NONE   -1
#define ADD    0
#define EXTRACT 5
#define MOVE   14
#define TEST   20
#define PRINT  26
#define DELETE 33
#define LIST   41
#define UPDATE 47
#define FRESHEN   55
#define COMMENT   64

int cmd = NONE;

#else
   enum choice {
      NONE = -1, ADD = 0, EXTRACT = 5, MOVE = 14, TEST = 20, PRINT = 26,
      DELETE = 33, LIST = 41, UPDATE = 47, FRESHEN = 55, COMMENT = 64
   };
   enum choice cmd = NONE;          /* assume no Novice command */
#endif

#endif /* end of not OOZ */

#ifdef SPECINIT
	void spec_init PARMS ((void));
	spec_init();							/* system-specific startup code */
#endif

	/* make sure T_UINT16 is an unsigned 16-bit type, exactly.  This
		code is included only if T_UINT16 was defined by default at the
		end of options.h. */
#ifdef CHECK_TUINT
	{
		T_UINT16 i;
		int status = 0;
		i = ((unsigned) 1) << 15;
		if (i < 0)
			status = 1;
		if (i != ((unsigned) 1) << 15)
			status = 1;
		i *= 2;
		if (i != 0)
			status = 1;
		if (status != 0)
			prterror('w', "Configuration problem: T_UINT16 is not 16 bits\n");
	}
#endif

   arg_count = argc;
   arg_vector = argv;
   zooname = argv[FIRST_ARG-1];     /* points to name or archive */

#ifdef OOZ
   if (argc < 2) {
      putstr (usage1);
      putstr (usage2);
      zooexit (1);
   }
#else
/* else not OOZ */
   if (argc < 2)
      goto show_usage;
   filecount = argc - 3;
   option = str_dup(argv[1]);

#ifdef TRACE_IO
   if (*option == ':') {         /* for debugging output */
      verbose++;
      option++;                  /* hide the : from other functions */
   }
#endif

#ifdef WAIT_PROMPT
   if (*option == 'w') {
		option++;						/* hide w from other functions */
		wait_return();
	}
#endif /* WAIT_PROMPT */

   if (*option == 'H') ms_help(option);
   if (*option == 'h' || *option == 'H')
      goto bigusage;
	if (strchr("-acDegflLPTuUvVx", *option) == NULL)
		goto give_list;

   if (*option == '-') {

#ifdef NOENUM
      cmd = instr (nov_cmds, str_lwr(option));
#else
      cmd = (enum choice) instr (nov_cmds, str_lwr(option));
#endif

      if (strlen(option) < 2 || cmd == NONE)
         goto show_usage;
      if (  ((cmd == ADD || cmd == MOVE || cmd == FRESHEN ||
                  cmd == UPDATE || cmd == DELETE) && argc < 4) ||
            ((cmd == EXTRACT || cmd == TEST || cmd == LIST ||
                     cmd == PRINT || cmd == COMMENT) && argc < 3)) {
         fprintf (stderr, incorrect_args);
         goto show_usage;
      }
   } else {
		char *wheresI;		/* will be null if I option not supplied */
		if	(
				(
					strchr("au",*option) &&
					(
						(((wheresI = strchr(option,'I')) != 0) &&
							argc != 3) ||
						wheresI==NULL && argc < 4
					)
				) ||
				 strchr("DU",*option) && argc < 4 ||
             strchr("cexlvVL",*option) && argc < 3 ||
             strchr("TP",*option)   && argc != 3 ||
				 (*option == 'f' && argc != 2) ||
				 (*option == 'g' &&
					(strchr(option,'A') == NULL && argc < 4 ||
					 strchr(option,'A') != NULL && argc != 3
					)
				 )
			) {
         fprintf (stderr, incorrect_args);
         goto show_usage;
      }
   }
#endif /* end of not OOZ */

#ifndef OOZ
   /* if not doing a list and no extension in archive name, add default
   extension */
   if (*option != 'f' && cmd != LIST && strchr("lvVL", *option) == NULL &&
         strchr(nameptr (zooname), EXT_CH) == NULL)
      zooname = newcat (zooname, EXT_DFLT);
#endif

/*
Here we allocate a large block of memory for the duration of the program.
lzc() and lzd() will use half of it each.  Routine getfile() will use all
of it.  Routine decode() will use the first 8192 bytes of it.  Routine
encode() will use all of it. */

/*                          fudge/2           fudge/2
**             [______________||________________|]
**               output buffer    input buffer
*/
   out_buf_adr = ealloc (MEM_BLOCK_SIZE);
   in_buf_adr = out_buf_adr + OUT_BUF_SIZE + (FUDGE/2);

#ifdef OOZ
zooext(zooname, "\0");     /* just extract -- no fancy stuff   */
zooexit (0);                  /* and exit normally                */
#else
/* else not OOZ -- parse command line and invoke a routine */
   if (cmd != NONE) {
      switch (cmd) {

         case ADD:      zooadd (zooname, filecount, &argv[3], "aP:"); break;
         case FRESHEN:  zooadd (zooname, filecount, &argv[3], "auP:"); break;
         case UPDATE:   zooadd (zooname, filecount, &argv[3], "aunP:"); break;
         case MOVE:     zooadd (zooname, filecount, &argv[3], "aMP:"); break;

         case EXTRACT:  zooext (zooname, "x"); break;
         case TEST:     zooext (zooname, "xNd"); break;
         case PRINT:    zooext (zooname, "xp"); break;

         case DELETE:   zoodel (zooname, "DP",1); break;
         case LIST:     zoolist (&argv[2], "VC", argc-2); break;
         case COMMENT:  comment (zooname, "c"); break;
         default: goto show_usage;
      }
   } else
      switch (*option) {

         case 'a':
         case 'u':
         case 'T':   
            zooadd (zooname, filecount, &argv[3], option); break;
#ifdef FILTER
			case 'f':
				zoofilt (option);  break;
#endif /* FILTER */
         case 'D':
            zoodel (zooname, option, 1); break;
         case 'U':
            zoodel (zooname, option, 0); break;
			case 'g':
				zoodel (zooname, option, 2); break;
         case 'v':
			case 'V':
         case 'l': 
            zoolist(&argv[2], option, 1); break;
         case 'L': 
            zoolist(&argv[2], option, argc-2); break;
         case 'e':
         case 'x': 
            zooext(zooname, option); break;
         case 'P':
            zoopack (zooname, option); break;
         case 'c':
            comment (zooname, option); break;
         default:
            goto give_list;
      }
zooexit (0);      /* don't fall through */

/* usage list including Novice commands */
show_usage:
   fprintf (stderr, "%s\n\n%s%s%s", version, usage, nov_usage, nov_cmds);
	zooexit (1);

/* brief usage list */
give_list:
	fprintf (stderr, usage); zooexit (1);

/* help screen */
bigusage:
printf("\n\n\n\n\n\n\n\n");
printf ("Zoo archiver, %s\n", version);
printf("(C) Copyright 1991 Rahul Dhesi -- Noncommercial use permitted\n");

printf (usage);
printf ("\nChoose a command from within {} and zero or more modifiers from within [].\n");

printf ("E.g.:  `zoo a save /bin/*' will archive all files in /bin into save.zoo.\n");
printf ("(Please see the user manual for a complete description of commands.)\n\n");
printf (nov_usage);
printf (nov_cmds);
printf ("\n\n\n\n");
wait_return();	/* print msg & wait for RETURN */

printf ("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
printf (usage);

printf (" Commands in {} mean:         |Modifiers in [] mean:\n");

printf ("  a     add files             | a     show archive name(s) in listing\n");
printf ("  c     update comments       | A     apply g or c to archive\n");
printf ("  D     delete stored files   | c     add/list comments\n");
printf ("  e,x   extract files         | d     extract/list deleted files too\n");
printf ("  g     adj. gen. limit/count | dd    extract/list only deleted files\n");
printf ("  l,L,v,V list filenames      | E     erase backup after packing\n");
printf ("  P     pack archive          | f     fast add (no compression) or list\n");
printf ("  T     fix archive datestamp | M     move when adding (erase original)\n");
printf ("  u     add only newer files  | n     add only files not already in archive\n");
printf ("  U     undelete stored files | N     send extracted data to Nowhere\n");
#ifdef FILTER
printf ("  f     act as filter         | c/u   compress/uncompress as filter\n");
#endif /* FILTER */
printf (" -----------------------------  O     don't ask \"Overwrite?\"\n");
printf ("  q     be quiet                p     pipe extracted data to standard output\n");
printf ("  :     don't store dir names   /,//  extract full pathnames\n");
printf ("  .     pack to current dir     I     add filenames read from stdin\n");
printf ("  C     show file CRC value     +/-   enable/disable generations\n");
printf ("  S     overwrite newer files   g     list generation limits\n");
printf ("  P     pack after adding       @n    start extract/list at position n\n");

#ifdef FATTR
printf ("  m     list file modes         OO    overwrite read-only files\n");
#endif /* FATTR */
printf ("  C     change archive cmnt     h     use high-compression method\n");
#endif /* end of not OOZ */

/* NOTE:  if allowed to fall through and return without an exit() statement,
   it was printing garbage--corrupted stack?  Why--bug in Microsoft C? */
zooexit (1);
return 1;	/* keep lint & compilers happy */
}

/* multi-screen help facility thanks to Bill Davidsen */

/* help screens */
static char *scrn1[] = {
   "",
	"command line format:",
	"  zoo {command}[options] archive files(s)",
	"",
	"Commands:",
	" a  add files",
	"    u - update, replace only if file is newer than saved version",
	"    n - new, add if file is not in archive",
	"    f - fast, don't compress at all",
	"    h - high performance compressor, slower than default",
	"    M - move files to archive, delete after saving",
	"    c - add a comment to each file added",
	"    C - add a comment to the archive as a whole",
	"    : - strip directory names, save filenames only",
	"    q - quiet (qq suppresses warnings, qqq suppresses nonfatal errors too)",
	"    P - pack after adding, remove overwritten or deleted files",
	"        (leaves a .bak file, use PP to overwrite it)",
	"    I - read filenames from standard input",
	"    + - enable generations",
	(char *)NULL
};

static char *scrn2[] = {
   "",
	" e  extract files",
	" x  extract files",
	"    : - extract to current directory (ignore pathnames)",
   "    . - make absolute pathnames relative to current directory",
	"        (name /etc/hosts becomes ./etc/hosts)",
	"    / - extract to subdirs, // create subdirs as needed - default",
	"        (the sequence :/ may be used to use but not create subdirs)",
	"    q - quiet",
	"    d - extract deleted files, too. dd extract *only* deleted files",
	"    N - extract to nowhere. Used to test the archive with xN or xNq",
	"    p - extract for pipe to standard output. Use q to avoid header",
	"",
#ifdef FATTR
	"    O - overwrite without asking, OO overwrites readonly files",
#else
	"    O - overwrite without asking",
#endif
	"    S - overwrite superceded (newer) files",
	(char *)NULL
};

static char *scrn3[] = {
   "",
	" l  list archive info",
	" L  list info for multiple archives",
	" v  list verbose file info and archive comment",
	" V  list verbose file info, archive and file comments",
	"    v - verbose (same as v command, used with L for multiple files",
	"    V - verbose with file comments",
	"    C - show CRC",
	"    a - show archive name in file listing (useful with L)",
#ifdef FATTR
	"    m - mode, show file modes in octal",
#endif
	"    d - show deleted files",
	"    q - quiet, shows only file info, no comments or headers",
	"    f - fast, lists only filename, no pathname, multiple columns",
	"    1 - one column output (for the f option)",
	"",
	" c  comment changes, change or add comments to listed files",
	"    (changes all file comments if no files given)",
	"    A - only change archive comment",
	(char *)NULL
};

static char *scrn4[] = {
   "",
	" P  pack archive, remove deleted or overwritten files",
	"    E - erase the .bak file when done",
	"",
	" D  delete files by name",
	"    P - pack after deletion, use PP if .bak file exists",
	"    q - quiet",
	"",
	" T  timestamp adjust, make archive age of newest file",
	"",
	" g  generation commands",
	"    l - set generation limit on files",
	"    A - apply limit to archive rather than a file (with gl)",
	"",
	" f  filter, copy stdin to stdout with [de]compression",
	"    c - compress",
	"    u - uncompress",
	"    h - use the high compression method",
	(char *)NULL
};

static char *scrn5[] = {
   "",
	"Examples:",
	"",
	"# just add a few files",
	"    zoo a arch file1 files",
	"# add C source files in subdirectories",
	"    zoo a test part1/*.c part2/*.c",
	"# add documentation files with high compression",
	"    zoo ah test *.doc",
	"",
	"# extract all files",
	"    zoo x test",
	"# extract files into the current directory",
	"    zoo x: test",
	"# extract a single file and sort before listing",
	"    zoo xp test users.lst | sort",
	"",
	"# list the contents and archive comments",
	"    zoo v arch",
	"# list all files in all archives",
	"    zoo L xxx.zoo /doc/*.zoo ../*.zoo",
	(char *)NULL
};

static char **screens[] = {
	scrn1,		/* intro and add */
	scrn2,		/* extract */
	scrn3,		/* list commands */
	scrn4,		/* other commands */
	scrn5,		/* add and extract examples */
	(char **)NULL
};

/* multi-screen help routine */
static void ms_help(options)
char *options;
{
#ifndef SZ_SCREEN			/* screen size can be overridden in options.h */
# define SZ_SCREEN 24
#endif
	int scrnlen = SZ_SCREEN;
	char ***curscreen, **curline;
	int linecount;

	/* if "Hnn" output in nn line format */
	if (++options) sscanf(options, "%d", &scrnlen);
	if (scrnlen < 2)
		scrnlen = SZ_SCREEN;

	/* loop thru screens */
	for (curscreen = screens; *curscreen != NULL; ++curscreen) {
		printf("\n\n\n\n");
		linecount = scrnlen;
		curline = *curscreen;
		while (*curline != NULL) {
			printf("%s\n", *(curline++));
			--linecount;
		}

		/* slew page */
		while (--linecount != 0) putchar('\n');
		wait_return();	/* print msg & wait for RETURN */
	}

	exit(0);
}

/* wait_return prints a message, then waits until user hits RETURN key,
then returns.  Special cases:  (a) if not interactive (as tested with
isatty() if available), it returns immediately; (b) while waiting for
RETURN, if EOF occurs, it causes zooexit(0) */

static void wait_return() 
{
#ifdef HAVE_ISATTY
	if (!isatty(fileno(stdout)) || !isatty(fileno(stdin)))
		return;
#endif
	(void) printf("Hit RETURN (or ENTER) key to continue...");
	for ( ; ;) {
		int key; 
		key = getchar();
		if (key == EOF)
			zooexit(0);
		if (key == '\n' || key == '\r')
			return;
	}
}