1 /* 2 checkTag.c - Version validation tool for LZ4 3 Copyright (C) Yann Collet 2018 - present 4 5 GPL v2 License 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License along 18 with this program; if not, write to the Free Software Foundation, Inc., 19 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 20 21 You can contact the author at : 22 - LZ4 homepage : http://www.lz4.org 23 - LZ4 source repo : https://github.com/lz4/lz4 24 */ 25 26 /* checkTag command : 27 * $ ./checkTag tag 28 * checkTag validates tags of following format : v[0-9].[0-9].[0-9]{any} 29 * The tag is then compared to LZ4 version number. 30 * They are compatible if first 3 digits are identical. 31 * Anything beyond that is free, and doesn't impact validation. 32 * Example : tag v1.8.1.2 is compatible with version 1.8.1 33 * When tag and version are not compatible, program exits with error code 1. 34 * When they are compatible, it exists with a code 0. 35 * checkTag is intended to be used in automated testing environment. 36 */ 37 38 #include <stdio.h> /* printf */ 39 #include <string.h> /* strlen, strncmp */ 40 #include "lz4.h" /* LZ4_VERSION_STRING */ 41 42 43 /* validate() : 44 * @return 1 if tag is compatible, 0 if not. 45 */ 46 static int validate(const char* const tag) 47 { 48 size_t const tagLength = strlen(tag); 49 size_t const verLength = strlen(LZ4_VERSION_STRING); 50 51 if (tagLength < 2) return 0; 52 if (tag[0] != 'v') return 0; 53 if (tagLength <= verLength) return 0; 54 55 if (strncmp(LZ4_VERSION_STRING, tag+1, verLength)) return 0; 56 57 return 1; 58 } 59 60 int main(int argc, const char** argv) 61 { 62 const char* const exeName = argv[0]; 63 const char* const tag = argv[1]; 64 if (argc!=2) { 65 printf("incorrect usage : %s tag \n", exeName); 66 return 2; 67 } 68 69 printf("Version : %s \n", LZ4_VERSION_STRING); 70 printf("Tag : %s \n", tag); 71 72 if (validate(tag)) { 73 printf("OK : tag is compatible with lz4 version \n"); 74 return 0; 75 } 76 77 printf("!! error : tag and versions are not compatible !! \n"); 78 return 1; 79 } 80
