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/*
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/*
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 * This file is part of FDNPKG
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 * This file is part of pkginst
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 * Copyright (C) 2013-2016 Mateusz Viste, All rights reserved.
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 * Copyright (C) 2013-2021 Mateusz Viste, All rights reserved.
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 */
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 */
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#include <stdio.h>   /* fopen, fclose... */
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#include <stdio.h>   /* fopen, fclose... */
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#include <string.h>  /* strcasecmp() */
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#include <string.h>  /* strcasecmp() */
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#include "lsm.h"     /* include self for control */
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#include "rtrim.h"
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#include "version.h"
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#include "helpers.h"
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/* 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) */
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static int readline_fromfile(FILE *fd, char *line, int maxlen) {
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  int bytebuff, linelen = 0;
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  for (;;) {
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    bytebuff = fgetc(fd);
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    if (bytebuff == EOF) {
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      line[linelen] = 0;
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      if (linelen == 0) return(-1);
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      return(linelen);
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    }
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    if (bytebuff < 0) return(-1);
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    if (bytebuff == '\r') continue; /* ignore CR */
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#include "lsm.h"     /* include self for control */
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    if (bytebuff == '\n') {
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      line[linelen] = 0;
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      return(linelen);
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    }
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    if (linelen < maxlen) line[linelen++] = bytebuff;
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  }
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}
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/* Loads metadata from an LSM file. Returns 0 on success, non-zero on error. */
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/* Loads metadata from an LSM file. Returns 0 on success, non-zero on error. */
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int readlsm(const char *filename, char *version, int version_maxlen) {
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int readlsm(const char *filename, char *version, size_t version_maxlen) {
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  char linebuff[128];
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  char linebuff[128];
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  char *valuestr;
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  char *valuestr;
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  int x;
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  FILE *fd;
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  FILE *fd;
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  /* reset fields to be read to empty values */
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  /* reset fields to be read to empty values */
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  version[0] = 0;
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  version[0] = 0;
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  /* open the file */
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  /* open the file */
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  fd = fopen(filename, "rb");
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  fd = fopen(filename, "rb");
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  if (fd == NULL) return(-1);
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  if (fd == NULL) return(-1);
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  /* read the LSM file line by line */
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  /* read the LSM file line by line */
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  while (readline_fromfile(fd, linebuff, sizeof(linebuff) - 1) >= 0) {
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  while (freadtokval(fd, linebuff, sizeof(linebuff), &valuestr, ':') == 0) {
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    for (x = 0;; x++) {
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      if (linebuff[x] == 0) {
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    if (valuestr != NULL) {
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        x = -1;
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        break;
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      } else if (linebuff[x] == ':') {
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        break;
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      }
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    }
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    if (x > 0) {
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      linebuff[x] = 0;
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      valuestr = linebuff + x + 1;
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      trim(linebuff);
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      trim(valuestr);
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      if (strcasecmp(linebuff, "version") == 0) snprintf(version, version_maxlen, "%s", valuestr);
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      if (strcasecmp(linebuff, "version") == 0) snprintf(version, version_maxlen, "%s", valuestr);
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    }
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    }
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  }
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  }
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  fclose(fd);
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  fclose(fd);
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  return(0);
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  return(0);