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 /* For ssize_t */
  24 #include <unistd.h>
  25 /* For FILE */
  26 #include <stdio.h>
  27
  28 /* Adjusts the verbosity level for msg() */
  29 void adjust_verbosity(int adj);
  30
  31 /* Verbosity levels using stdout */
  32 #define MSG_NORMAL    0
  33 #define MSG_DEBUG     1
  34 #define MSG_QUIET    -1
  35 /* Verbosity levels using stderr */
  36 #define MSG_ERROR    -2
  37 #define MSG_CRITICAL -3
  38
  39 /* Prints messages to console according to the current verbosity */
  40 int msg(int level, const char *fmt, ...);
  41
  42 /* Malloc which either succeeds or exits */
  43 void *xmalloc(size_t size);
  44
  45 /* Ditto for strdup */
  46 char *xstrdup(const char *s);
  47
  48 /* Human-readable printout of binary data */
  49 void binary_print(const char *s, ssize_t len);
  50
  51 /* Writes data to a file or exits on failure */
  52 void xfwrite(const void *ptr, size_t size, FILE *stream);
  53
  54 /* Writes an int to a file, using len bytes, in bigendian order */
  55 void write_int(uint64_t value, size_t len, FILE *to);
  56
  57 /* Writes a binary string to a file */
  58 void write_binary_string(const char *string, size_t len, FILE *to);
  59
  60 /* Writes a normal C string to a file */
  61 void write_string(const char *string, FILE *to);
  62
  63 /* Reads an int from a file, using len bytes, in bigendian order */
  64 uint64_t read_int(char **from, size_t len, const char *max);
  65
  66 /* Reads a binary string from a file */
  67 char *read_binary_string(char **from, size_t len, const char *max);
  68
  69 /* Reads a normal C string from a file */
  70 char *read_string(char **from, const char *max);
  71