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|
/*(LGPL)
---------------------------------------------------------------------------
logger.c - Simple logger with redirection
---------------------------------------------------------------------------
* Copyright (C) 2003, David Olofson
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
#include "config.h"
#include "logger.h"
#include "glSDL.h"
#define LOG_BUFFER 1024
static int i__last;
#define for_one_or_all(iterator, index, items) \
if(index < LOG_TARGETS) \
{ \
if(index >= 0) \
iterator = i__last = index; \
else \
{ \
iterator = 0; \
i__last = items - 1; \
} \
} \
else \
{ \
iterator = 0; \
i__last = -10; \
} \
--iterator; \
while(++iterator <= i__last)
typedef struct
{
/* Stream output */
int use_stream;
FILE *stream;
/* Callback output */
int handle;
int (*callback)(int handle, const char *data);
/* Formatting control */
unsigned flags;
int written;
} LOG_target;
typedef struct
{
/* Output */
int target;
/* Atributes */
unsigned attr;
} LOG_level;
static LOG_level *l_levels = NULL;
static LOG_target *l_targets = NULL;
static char *l_buffer = NULL;
Uint32 start_time;
/*--------------------------------------------------------------------
Low level internal stuff
--------------------------------------------------------------------*/
/* Write stuff without any translation */
static inline int log_write_raw(int target, const char *text)
{
if(l_targets[target].use_stream)
return fputs(text, l_targets[target].stream);
else if(l_targets[target].callback)
return l_targets[target].callback(
l_targets[target].handle, text);
else
{
/* We should never get here. */
assert(0);
}
}
/* Write log file header if applicable. */
static inline void check_header(int target)
{
if(l_targets[target].written)
return;
if(l_targets[target].flags & LOG_HTML)
{
log_write_raw(target, "<!DOCTYPE HTML PUBLIC "
"\"-//W3C//DTD HTML 4.01 Transitional//EN\" "
"\"http://www.w3.org/TR/REC-html40/loose.dtd\">\n");
log_write_raw(target, "<HTML>\n\t<HEAD>\n");
log_write_raw(target, "\t\t<TITLE>Log File</TITLE>\n");
log_write_raw(target, "\t\t<meta http-equiv=\"Content-Type\" "
"content=\"text/html; charset=ISO-8859-1\">\n");
log_write_raw(target, "\t</HEAD>\n");
log_write_raw(target, "\t<BODY BGCOLOR=#000000 TEXT=#999999>\n");
}
l_targets[target].written = 1;
}
/* Write log file footer if applicable. */
static inline void check_footer(int target)
{
if(!l_targets[target].written)
return;
if(l_targets[target].flags & LOG_HTML)
log_write_raw(target, "\t</BODY>\n</HTML>\n");
}
/* Write converting/escaping any reserved characters as needed */
static inline int log_write(int target, const char *text)
{
int i;
if(l_targets[target].flags & LOG_HTML)
{
/*
FIXME: Optimize this a little, maybe. :-)
*/
char buf[2] = "\0\0";
int last = -1;
for(i = 0; text[i]; ++i)
{
buf[0] = text[i];
switch(text[i])
{
case '\n':
log_write_raw(target, "<br>\n");
break;
case ' ':
if(' ' == last)
log_write_raw(target, " ");
else
log_write_raw(target, " ");
break;
case '<':
log_write_raw(target, "<");
break;
case '>':
log_write_raw(target, ">");
break;
case '&':
log_write_raw(target, "&");
break;
default:
log_write_raw(target, buf);
break;
}
last = text[i];
}
return i;
}
else
return log_write_raw(target, text);
}
static inline void put_timestamp(int level)
{
if(l_targets[l_levels[level].target].flags & LOG_TIMESTAMP)
{
char buf[16];
snprintf(buf, sizeof(buf)-1, "[%d] ", SDL_GetTicks() - start_time);
log_write_raw(l_levels[level].target, buf);
}
}
#define ANSI_SUPPORTED_FLAGS (LOG_COLORS | LOG_BRIGHT | LOG_STRONG | LOG_BLINK)
#define HTML_SUPPORTED_FLAGS (LOG_COLORS | LOG_BRIGHT | LOG_STRONG | LOG_BLINK)
static inline void set_attr(int level)
{
unsigned a = l_levels[level].attr;
if(l_targets[l_levels[level].target].flags & LOG_ANSI)
{
#define SEP if('[' != buf[pos - 1]) buf[pos++] = ';'
int pos = 0;
char buf[24];
if(!(a & ANSI_SUPPORTED_FLAGS))
return;
buf[pos++] = '\033';
buf[pos++] = '[';
if(a & LOG_COLORS)
{
buf[pos++] = '3';
buf[pos++] = '0' + (a & LOG_COLORS) - 1;
}
if(a & LOG_BRIGHT)
{
SEP;
buf[pos++] = '1';
}
if(a & LOG_STRONG)
{
SEP;
buf[pos++] = '4';
}
if(a & LOG_BLINK)
{
SEP;
buf[pos++] = '5';
}
buf[pos++] = 'm';
buf[pos++] = '\0';
log_write_raw(l_levels[level].target, buf);
#undef SEP
}
else if(l_targets[l_levels[level].target].flags & LOG_HTML)
{
if(a & LOG_COLORS)
{
const char *sel;
if(a & LOG_BRIGHT)
switch( (a & LOG_COLORS) - 1)
{
case 0: sel = "<FONT COLOR=#333333>"; break;
case 1: sel = "<FONT COLOR=#990000>"; break;
case 2: sel = "<FONT COLOR=#009900>"; break;
case 3: sel = "<FONT COLOR=#999900>"; break;
case 4: sel = "<FONT COLOR=#000099>"; break;
case 5: sel = "<FONT COLOR=#990099>"; break;
case 6: sel = "<FONT COLOR=#009999>"; break;
case 7:
default:
sel = "<FONT COLOR=#999999>"; break;
}
else
switch( (a & LOG_COLORS) - 1)
{
case 0: sel = "<FONT COLOR=#666666>"; break;
case 1: sel = "<FONT COLOR=#ff0000>"; break;
case 2: sel = "<FONT COLOR=#00ff00>"; break;
case 3: sel = "<FONT COLOR=#ffff00>"; break;
case 4: sel = "<FONT COLOR=#0000ff>"; break;
case 5: sel = "<FONT COLOR=#ff00ff>"; break;
case 6: sel = "<FONT COLOR=#00ffff>"; break;
case 7:
default:
sel = "<FONT COLOR=#ffffff>"; break;
}
log_write_raw(l_levels[level].target, sel);
}
if(a & LOG_STRONG)
log_write_raw(l_levels[level].target, "<STRONG>");
if(a & LOG_BLINK)
log_write_raw(l_levels[level].target, "<BLINK>");
}
}
static inline void reset_attr(int level)
{
unsigned a = l_levels[level].attr;
if(l_targets[l_levels[level].target].flags & LOG_ANSI)
{
if(!(a & ANSI_SUPPORTED_FLAGS))
return;
log_write_raw(l_levels[level].target, "\033[0m");
}
else if(l_targets[l_levels[level].target].flags & LOG_HTML)
{
if(a & LOG_BLINK)
log_write_raw(l_levels[level].target, "</BLINK>");
if(a & LOG_STRONG)
log_write_raw(l_levels[level].target, "</STRONG>");
if(a & LOG_COLORS)
log_write_raw(l_levels[level].target, "</FONT>");
}
}
static inline int is_active(int level)
{
LOG_target *t = &l_targets[l_levels[level].target];
return (t->use_stream || t->callback);
}
/*--------------------------------------------------------------------
API entry points
--------------------------------------------------------------------*/
int log_open(void)
{
if(l_levels)
return 0;
l_levels = calloc(LOG_LEVELS, sizeof(LOG_level));
if(!l_levels)
return -1;
l_targets = calloc(LOG_TARGETS, sizeof(LOG_target));
if(!l_targets)
{
log_close();
return -2;
}
l_buffer = calloc(1, LOG_BUFFER);
if(!l_buffer)
{
log_close();
return -3;
}
log_set_target_stream(-1, stdout);
log_set_target_flags(-1, 0);
log_set_level_target(-1, 0);
log_set_level_attr(-1, LOG_NOCOLOR);
start_time = SDL_GetTicks();
return 0;
}
#define CHECK_INIT (l_levels ? 0 : -1)
void log_close(void)
{
int i;
if(CHECK_INIT < 0)
return;
for(i = 0; i < LOG_TARGETS; ++i)
check_footer(i);
free(l_targets);
l_targets = NULL;
free(l_levels);
l_levels = NULL;
free(l_buffer);
l_buffer = NULL;
}
void log_set_target_stream(int target, FILE *stream)
{
int i;
if(CHECK_INIT < 0)
return;
for_one_or_all(i, target, LOG_TARGETS)
{
l_targets[i].callback = NULL;
l_targets[i].stream = stream;
l_targets[i].use_stream = (stream != NULL);
}
}
void log_set_target_callback(int target,
int (*callback)(int handle, const char *data), int handle)
{
int i;
if(CHECK_INIT < 0)
return;
for_one_or_all(i, target, LOG_TARGETS)
{
l_targets[i].use_stream = 0;
l_targets[i].callback = callback;
l_targets[i].handle = handle;
}
}
void log_set_target_flags(int target, unsigned flags)
{
int i;
if(CHECK_INIT < 0)
return;
for_one_or_all(i, target, LOG_TARGETS)
l_targets[i].flags = flags;
}
void log_set_level_target(int level, int target)
{
int i;
if(CHECK_INIT < 0)
return;
for_one_or_all(i, level, LOG_LEVELS)
l_levels[i].target = target;
}
void log_set_level_attr(int level, unsigned attr)
{
int i;
if(CHECK_INIT < 0)
return;
for_one_or_all(i, level, LOG_LEVELS)
l_levels[i].attr = attr;
}
int log_puts(int level, const char *text)
{
int result, result2;
if(CHECK_INIT < 0)
return -1;
if(level < 0 || level >= LOG_LEVELS)
return -2;
if(!is_active(level))
return 0;
check_header(l_levels[level].target);
set_attr(level);
put_timestamp(level);
result = log_write(l_levels[level].target, text);
if(result >= 0)
{
result2 = log_write_raw(l_levels[level].target, "\n");
if(result2 >= 0)
result += result2;
}
reset_attr(level);
return result;
}
int log_printf(int level, const char *format, ...)
{
va_list args;
int result;
if(CHECK_INIT < 0)
return -1;
if(level < 0 || level >= LOG_LEVELS)
return -2;
if(!is_active(level))
return 0;
check_header(l_levels[level].target);
set_attr(level);
put_timestamp(level);
va_start(args, format);
result = vsnprintf(l_buffer, LOG_BUFFER-1, format, args);
va_end(args);
if(result >= 0)
result = log_write(l_levels[level].target, l_buffer);
reset_attr(level);
return result;
}
|
