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/*
* Copyright (c) 2001-2006 Motoyuki Kasahara
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "build-pre.h"
#include "eb.h"
#include "build-post.h"
#include <stdarg.h>
/*
* Mutex.
*/
#ifdef ENABLE_PTHREAD
static pthread_mutex_t log_mutex = PTHREAD_MUTEX_INITIALIZER;
#endif
/*
* Initialization flag.
*/
int eb_log_initialized = 0;
/*
* Debug log flag.
*/
int eb_log_flag = 0;
/*
* Pointer to log function.
*/
static void (*eb_log_function)(const char *message, va_list) = eb_log_stderr;
/*
* Initialize logging sub-system.
*/
void
eb_initialize_log(void)
{
if (eb_log_initialized)
return;
eb_log_flag = (getenv(EB_DEBUG_ENVIRONMENT_VARIABLE) != NULL);
eb_log_function = eb_log_stderr;
eb_log_initialized = 1;
}
/*
* Set log function.
*/
void
eb_set_log_function(void (*function)(const char *message, va_list ap))
{
if (!eb_log_initialized)
eb_initialize_log();
eb_log_function = function;
}
/*
* Enable logging.
*/
void
eb_enable_log(void)
{
if (!eb_log_initialized)
eb_initialize_log();
eb_log_flag = 1;
}
/*
* Disable logging.
*/
void
eb_disable_log(void)
{
if (!eb_log_initialized)
eb_initialize_log();
eb_log_flag = 0;
}
/*
* Log a message.
*/
void
eb_log(const char *message, ...)
{
va_list ap;
va_start(ap, message);
if (eb_log_flag && eb_log_function != NULL)
eb_log_function(message, ap);
va_end(ap);
}
/*
* Output a log message to standard error.
* This is the default log handler.
*
* Currently, this function doesn't work if the system lacks vprintf()
* and dopront().
*/
void
eb_log_stderr(const char *message, va_list ap)
{
pthread_mutex_lock(&log_mutex);
fputs("[EB] ", stderr);
vfprintf(stderr, message, ap);
fputc('\n', stderr);
fflush(stderr);
pthread_mutex_unlock(&log_mutex);
}
#define MAX_QUOTED_STREAM_LENGTH 100
/*
* Return Quoted printable string of `stream'.
*/
const char *
eb_quoted_stream(const char *stream, size_t stream_length)
{
static char quoted_streams[EB_MAX_KEYWORDS][MAX_QUOTED_STREAM_LENGTH + 3];
static int current_index = 0;
unsigned char *quoted_p;
const unsigned char *stream_p;
size_t quoted_length = 0;
int i;
current_index = (current_index + 1) % EB_MAX_KEYWORDS;
quoted_p = (unsigned char *)quoted_streams[current_index];
stream_p = (const unsigned char *)stream;
if (stream == NULL)
return "";
for (i = 0; i < stream_length && *stream_p != '\0'; i++) {
if (0x20 <= *stream_p && *stream_p <= 0x7f && *stream_p != '=') {
if (MAX_QUOTED_STREAM_LENGTH < quoted_length + 1) {
*quoted_p++ = '.';
*quoted_p++ = '.';
break;
}
*quoted_p++ = *stream_p;
quoted_length++;
} else {
if (MAX_QUOTED_STREAM_LENGTH < quoted_length + 3) {
*quoted_p++ = '.';
*quoted_p++ = '.';
break;
}
*quoted_p++ = '=';
*quoted_p++ = "0123456789ABCDEF" [*stream_p / 0x10];
*quoted_p++ = "0123456789ABCDEF" [*stream_p % 0x10];
quoted_length += 3;
}
stream_p++;
}
*quoted_p = '\0';
return quoted_streams[current_index];
}
/*
* Return Quoted printable string.
*/
const char *
eb_quoted_string(const char *string)
{
return eb_quoted_stream(string, strlen(string));
}
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