/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/*
Copyright 2013-2021 The Libfossil Authors, see LICENSES/BSD-2-Clause.txt
SPDX-License-Identifier: BSD-2-Clause-FreeBSD
SPDX-FileCopyrightText: 2021 The Libfossil Authors
SPDX-ArtifactOfProjectName: Libfossil
SPDX-FileType: Code
Heavily indebted to the Fossil SCM project (https://fossil-scm.org).
*****************************************************************************
This file houses an application for creating Fossil-format deltas
from, and applying them to, files.
*/
#include "fossil-scm/fossil-cli.h" /* Fossil App mini-framework */
#include "fossil-scm/fossil-internal.h"
#include <string.h>
static void fcli_local_help(){
puts("Usages:\n");
printf("\t%s file1 file2\n", fcli.appName);
printf("\t%s -a|--apply delta_file fileVersion1\n\n", fcli.appName);
puts("The first form outputs a fossil-format "
"delta of two files.");
puts("The second form applies a delta (the first file) "
"to the second file.");
puts("\nAll output goes to stdout.");
}
int main(int argc, char const * const * argv ){
int rc = 0;
const char * f1 = NULL;
const char * f2 = NULL;
bool doApply = false;
fsl_error err = fsl_error_empty;
fsl_buffer b1 = fsl_buffer_empty,
b2 = fsl_buffer_empty,
d12 = fsl_buffer_empty
;
fcli_cliflag FCliFlags[] = {
FCLI_FLAG_BOOL("a","apply",&doApply,
"Applies the first file as a delta to the second."),
fcli_cliflag_empty_m
};
fcli_help_info FCliHelp = {
"Creates or applies fossil-format deltas.",
"file1 file2\nOR\n--apply delta-file source-file",
fcli_local_help
};
fcli.cliFlags = FCliFlags;
fcli.appHelp = &FCliHelp;
rc = fcli_setup(argc, argv);
if(rc) goto end;
doApply = fcli_flag2("a", "apply", NULL);
if(fcli_has_unused_flags(0)) goto end;
f1 = fcli_next_arg(1);
f2 = fcli_next_arg(1);
if(!f2){
rc = fcli_err_set(FSL_RC_MISUSE,
"Invalid arguments. Try --help.");
goto end;
}
rc = fsl_buffer_fill_from_filename(&b1, f1);
if(rc){
rc = fcli_err_set(rc, "Could not open file: %s\n", f1);
goto end;
}
rc = fsl_buffer_fill_from_filename(&b2, f2);
if(rc){
rc = fcli_err_set(rc, "Could not open file: %s\n", f2);
goto end;
}
if(doApply){
rc = fsl_buffer_delta_apply2(&b2, &b1, &b2, &err);
if(err.code){
f_out("DELTA ERROR: #%d (%s): %b\n", err.code,
fsl_rc_cstr(err.code), &err.msg);
}
if(rc) goto end;
f_out("%b", &b2);
}else{
rc = fsl_buffer_delta_create(&b1, &b2, &d12);
if(rc) goto end;
assert(!rc);
if(1){
/* extra verification */
rc = fsl_buffer_delta_apply(&b1, &d12, &b1);
assert(0==fsl_buffer_compare(&b1, &b2));
if(rc) goto end;
}
f_out("%b\n", &d12);
}
end:
fsl_error_clear(&err);
fsl_buffer_clear(&b1);
fsl_buffer_clear(&b2);
fsl_buffer_clear(&d12);
return fcli_end_of_main(rc);
}