| 0,0 → 1,77 |
|---|
| /* |
| * This file is part of FDNPKG |
| * Copyright (C) 2013-2016 Mateusz Viste, All rights reserved. |
| */ |
| |
| #include <stdio.h> /* fopen, fclose... */ |
| #include <string.h> /* strcasecmp() */ |
| |
| #include "lsm.h" /* include self for control */ |
| #include "rtrim.h" |
| #include "version.h" |
| |
| /* reads a line from a file descriptor, and writes it to *line, the *line array is filled no more than maxlen bytes. returns the number of byte read on success, or a negative value on failure (reaching EOF is considered an error condition) */ |
| static int readline_fromfile(FILE *fd, char *line, int maxlen) { |
| int bytebuff, linelen = 0; |
| for (;;) { |
| bytebuff = fgetc(fd); |
| if (bytebuff == EOF) { |
| line[linelen] = 0; |
| if (linelen == 0) return(-1); |
| return(linelen); |
| } |
| if (bytebuff < 0) return(-1); |
| if (bytebuff == '\r') continue; /* ignore CR */ |
| if (bytebuff == '\n') { |
| line[linelen] = 0; |
| return(linelen); |
| } |
| if (linelen < maxlen) line[linelen++] = bytebuff; |
| } |
| } |
| |
| |
| /* Loads metadata from an LSM file. Returns 0 on success, non-zero on error. */ |
| int readlsm(char *filename, char *version, int version_maxlen) { |
| char linebuff[128]; |
| char *valuestr; |
| int x; |
| FILE *fd; |
| /* reset fields to be read to empty values */ |
| version[0] = 0; |
| /* open the file */ |
| fd = fopen(filename, "rb"); |
| if (fd == NULL) return(-1); |
| /* check the file's header */ |
| if (readline_fromfile(fd, linebuff, 64) < 0) { |
| fclose(fd); |
| return(-1); |
| } |
| if (strcasecmp(linebuff, "begin3") != 0) { |
| fclose(fd); |
| return(-1); |
| } |
| /* read the LSM file line by line */ |
| while (readline_fromfile(fd, linebuff, 127) >= 0) { |
| for (x = 0;; x++) { |
| if (linebuff[x] == 0) { |
| x = -1; |
| break; |
| } else if (linebuff[x] == ':') { |
| break; |
| } |
| } |
| if (x > 0) { |
| linebuff[x] = 0; |
| valuestr = linebuff + x + 1; |
| trim(linebuff); |
| trim(valuestr); |
| if (strcasecmp(linebuff, "version") == 0) { |
| snprintf(version, version_maxlen, "%s", valuestr); |
| version[version_maxlen] = 0; /* snprintf is supposed to terminate string itself, but the DJGPP doesn't */ |
| } |
| } |
| } |
| fclose(fd); |
| return(0); |
| } |