diff options
Diffstat (limited to 'utils.c')
| -rw-r--r-- | utils.c | 41 |
1 files changed, 39 insertions, 2 deletions
@@ -1,3 +1,23 @@ +/* + * Main functions of the program. + * + * Copyright (C) 2007 David Härdeman <david@hardeman.nu> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + #include <stdlib.h> #include <stdio.h> #include <ctype.h> @@ -7,8 +27,13 @@ #include "utils.h" +/* Controls the verbosity level for msg() */ int verbosity = 0; +/* + * Prints messages to console according to the current verbosity + * - see utils.h for level defines + */ int msg(int level, const char *fmt, ...) { @@ -29,6 +54,7 @@ msg(int level, const char *fmt, ...) return ret; } +/* Malloc which either succeeds or exits */ void * xmalloc(size_t size) { @@ -40,6 +66,7 @@ xmalloc(size_t size) return result; } +/* Ditto for strdup */ char * xstrdup(const char *s) { @@ -51,6 +78,7 @@ xstrdup(const char *s) return result; } +/* Human-readable printout of binary data */ void binary_print(const char *s, ssize_t len) { @@ -64,6 +92,7 @@ binary_print(const char *s, ssize_t len) } } +/* Writes data to a file or exits on failure */ void xfwrite(const void *ptr, size_t size, FILE *stream) { @@ -73,6 +102,7 @@ xfwrite(const void *ptr, size_t size, FILE *stream) } } +/* Writes an int to a file, using len bytes, in bigendian order */ void write_int(uint64_t value, size_t len, FILE *to) { @@ -84,18 +114,21 @@ write_int(uint64_t value, size_t len, FILE *to) xfwrite(buf, len, to); } +/* Writes a binary string to a file */ void write_binary_string(const char *string, size_t len, FILE *to) { xfwrite(string, len, to); } +/* Writes a normal C string to a file */ void write_string(const char *string, FILE *to) { xfwrite(string, strlen(string) + 1, to); } +/* Reads an int from a file, using len bytes, in bigendian order */ uint64_t read_int(char **from, size_t len, const char *max) { @@ -103,7 +136,8 @@ read_int(char **from, size_t len, const char *max) int i; if (*from + len > max) { - msg(MSG_CRITICAL, "Attempt to read beyond end of file, corrupt file?\n"); + msg(MSG_CRITICAL, + "Attempt to read beyond end of file, corrupt file?\n"); exit(EXIT_FAILURE); } @@ -113,13 +147,15 @@ read_int(char **from, size_t len, const char *max) return result; } +/* Reads a binary string from a file */ char * read_binary_string(char **from, size_t len, const char *max) { char *result; if (*from + len > max) { - msg(MSG_CRITICAL, "Attempt to read beyond end of file, corrupt file?\n"); + msg(MSG_CRITICAL, + "Attempt to read beyond end of file, corrupt file?\n"); exit(EXIT_FAILURE); } @@ -129,6 +165,7 @@ read_binary_string(char **from, size_t len, const char *max) return result; } +/* Reads a normal C string from a file */ char * read_string(char **from, const char *max) { |