utils.h

   1 /*
   2  * Main functions of the program.
   3  *
   4  * Copyright (C) 2007 David Härdeman <david@hardeman.nu>
   5  *
   6  *      This program is free software; you can redistribute it and/or modify it
   7  *      under the terms of the GNU General Public License as published by the
   8  *      Free Software Foundation version 2 of the License.
   9  *
  10  *      This program is distributed in the hope that it will be useful, but
  11  *      WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *      General Public License for more details.
  14  *
  15  *      You should have received a copy of the GNU General Public License along
  16  *      with this program; if not, write to the Free Software Foundation, Inc.,
  17  *      51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  */
  20
  21 /* For uint64_t */
  22 #include <stdint.h>
  23
  24 /* Controls the verbosity level for msg() */
  25 extern int verbosity;
  26
  27 /* Verbosity levels using stdout */
  28 #define MSG_NORMAL    0
  29 #define MSG_DEBUG     1
  30 #define MSG_QUIET    -1
  31 /* Verbosity levels using stderr */
  32 #define MSG_ERROR    -2
  33 #define MSG_CRITICAL -3
  34
  35 /* Prints messages to console according to the current verbosity */
  36 int msg(int level, const char *fmt, ...);
  37
  38 /* Malloc which either succeeds or exits */
  39 void *xmalloc(size_t size);
  40
  41 /* Ditto for strdup */
  42 char *xstrdup(const char *s);
  43
  44 /* Human-readable printout of binary data */
  45 void binary_print(const char *s, ssize_t len);
  46
  47 /* Writes data to a file or exits on failure */
  48 void xfwrite(const void *ptr, size_t size, FILE *stream);
  49
  50 /* Writes an int to a file, using len bytes, in bigendian order */
  51 void write_int(uint64_t value, size_t len, FILE *to);
  52
  53 /* Writes a binary string to a file */
  54 void write_binary_string(const char *string, size_t len, FILE *to);
  55
  56 /* Writes a normal C string to a file */
  57 void write_string(const char *string, FILE *to);
  58
  59 /* Reads an int from a file, using len bytes, in bigendian order */
  60 uint64_t read_int(char **from, size_t len, const char *max);
  61
  62 /* Reads a binary string from a file */
  63 char *read_binary_string(char **from, size_t len, const char *max);
  64
  65 /* Reads a normal C string from a file */
  66 char *read_string(char **from, const char *max);
  67