Subversion Repositories SvarDOS

Rev

Rev 219 | Rev 249 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
219 mateuszvis 1 
/*
2 
 * This file is part of FDNPKG
3 
 * Copyright (C) 2013-2016 Mateusz Viste, All rights reserved.
4 
 */
5 
 
6 
#include <stdio.h>   /* fopen, fclose... */
7 
#include <string.h>  /* strcasecmp() */
8 
 
9 
#include "lsm.h"     /* include self for control */
10 
#include "rtrim.h"
11 
#include "version.h"
12 
 
13 
/* 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) */
14 
static int readline_fromfile(FILE *fd, char *line, int maxlen) {
15 
  int bytebuff, linelen = 0;
16 
  for (;;) {
17 
    bytebuff = fgetc(fd);
18 
    if (bytebuff == EOF) {
19 
      line[linelen] = 0;
20 
      if (linelen == 0) return(-1);
21 
      return(linelen);
22 
    }
23 
    if (bytebuff < 0) return(-1);
24 
    if (bytebuff == '\r') continue; /* ignore CR */
25 
    if (bytebuff == '\n') {
26 
      line[linelen] = 0;
27 
      return(linelen);
28 
    }
29 
    if (linelen < maxlen) line[linelen++] = bytebuff;
30 
  }
31 
}
32 
 
33 
 
34 
/* Loads metadata from an LSM file. Returns 0 on success, non-zero on error. */
245 mateuszvis 35 
int readlsm(const char *filename, char *version, int version_maxlen) {
219 mateuszvis 36 
  char linebuff[128];
37 
  char *valuestr;
38 
  int x;
39 
  FILE *fd;
40 
  /* reset fields to be read to empty values */
41 
  version[0] = 0;
42 
  /* open the file */
43 
  fd = fopen(filename, "rb");
44 
  if (fd == NULL) return(-1);
45 
  /* read the LSM file line by line */
245 mateuszvis 46 
  while (readline_fromfile(fd, linebuff, sizeof(linebuff) - 1) >= 0) {
219 mateuszvis 47 
    for (x = 0;; x++) {
48 
      if (linebuff[x] == 0) {
49 
        x = -1;
50 
        break;
51 
      } else if (linebuff[x] == ':') {
52 
        break;
53 
      }
54 
    }
55 
    if (x > 0) {
56 
      linebuff[x] = 0;
57 
      valuestr = linebuff + x + 1;
58 
      trim(linebuff);
59 
      trim(valuestr);
245 mateuszvis 60 
      if (strcasecmp(linebuff, "version") == 0) snprintf(version, version_maxlen, "%s", valuestr);
219 mateuszvis 61 
    }
62 
  }
63 
  fclose(fd);
64 
  return(0);
65 
}