/*************************************************************************
 * (C) 2010 AITNET - Sofia/Bulgaria - <office@aitbg.com>
 *  by Michael Pounov <misho@aitbg.com>
 *
 * $Author: misho $
 * $Id: dpatch.c,v 1.2 2011/06/08 12:45:41 misho Exp $
 *
 *************************************************************************/
#include "global.h"


int Verbose, Mode;
extern char compiled[], compiledby[], compilehost[];


static void Usage()
{
	printf("-= DELTA PATCH =- Delta patch binaries tool\n"
		"=== %s === %s@%s ===\n\n"
		"Syntax: dpatch [option] <mode> <input_file | ->\n\n"
		"\tMode:: S|sig|signature\t\tCreate Siganture\n"
		"\tMode:: D|del|delta\t\tCreate Delta patch\n"
		"\tMode:: P|pat|patch\t\tPatch file from delta\n"
		"\t-v\t\t\tVerbose (more -v more verbosity)\n"
		"\t-s <signature_file>\tSignature file (default - stdout)\n"
		"\t-d <delta_file>\t\tDelta patch file (default - stdout)\n"
		"\t-p <patch_file>\t\tPatch local binary file (default - stdout)\n"
		"\n", compiled, compiledby, compilehost);
}


int main(int argc, char **argv)
{
	char ch, szDltName[MAXPATHLEN] = "-", szSigName[MAXPATHLEN] = "-", 
	     szPName[MAXPATHLEN] = "-", szInName[MAXPATHLEN] = "-", Mode = 0;

	while ((ch = getopt(argc, argv, "hs:d:p:v")) != -1)
		switch (ch) {
			case 'v':
				Verbose++;
				break;
			case 's':
				Mode |= 1;
				strlcpy(szSigName, optarg, MAXPATHLEN);
				break;
			case 'd':
				Mode |= 2;
				strlcpy(szDltName, optarg, MAXPATHLEN);
				break;
			case 'p':
				Mode |= 4;
				strlcpy(szPName, optarg, MAXPATHLEN);
				break;
			case 'h':
			default:
				Usage();
				return 1;
		}
	argc -= optind;
	argv += optind;
	if (2 > argc) {
		printf("Error:: not enough parameters ...\n");
		Usage();
		return 1;
	} else
		strlcpy(szInName, argv[1], MAXPATHLEN);

	if ('S' == *argv[0] || !strncmp(argv[0], "sig", 3)) {
		VERB(1) printf(">>> Signature mode: signature file=%s to_file=%s\n", 
				szSigName, szInName);
		if (syncSignature(szInName, szSigName, 2)) {
			printf("Error:: in create signature #%d - %s\n", 
					sync_GetErrno(), sync_GetError());
			return 1;
		}
		VERB(1) printf(" Done.\n");
		return 0;
	}
	if ('D' == *argv[0] || !strncmp(argv[0], "del", 3)) {
		if (!*szSigName || '-' == *szSigName) {
			printf("Error:: missing signature file!\n");
			return 1;
		}

		VERB(1) printf(">>> Delta mode: signature file=%s delta file=%s from_file=%s\n", 
				szSigName, szDltName, szInName);
		switch (syncDelta(szInName, szSigName, szDltName, 3)) {
			case -1:
				printf("Error:: in create delta patch #%d - %s\n", 
						sync_GetErrno(), sync_GetError());
				return 1;
			case 1:
				VERB(1) printf("Info:: Not found differences in file %s\n", szInName);
				break;
			case 0:
				VERB(1) printf("Info:: Create Delta patch file %s\n", szDltName);
				break;
			default:
				printf("Error:: Unknown return code in delta patch!\n");
				return 2;
		}
		VERB(1) printf(" Done.\n");
		return 0;
	}
	if ('P' == *argv[0] || !strncmp(argv[0], "pat", 3)) {
		if (!*szDltName || '-' == *szDltName) {
			printf("Error:: missing delta file!\n");
			return 1;
		}
		if (2 > argc)
			*szInName = 0;

		VERB(1) printf(">>> Patch mode: to_file=%s delta file=%s *differnt patch file=%s\n", 
				szPName, szDltName, szInName);
		if (syncPatch(szInName, szDltName, szPName, 1) == -1) {
			printf("Error:: can`t apply patch #%d - %s\n", 
					sync_GetErrno(), sync_GetError());
			return 1;
		}

		VERB(1) printf(" Done.\n");
		return 0;
	}

	printf("Error:: unknown mode ... %s\n", argv[0]);
	return 1;
}