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/*
* Copyright 2017 Daniel Silverstone <dsilvers@netsurf-browser.org>
*
* This file is part of libnslog.
*
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
*/
/**
* \file
* NetSurf Logging Core
*/
#include "nslog/nslog.h"
#include <stdbool.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
static bool nslog__corked = true;
static struct nslog_cork_chain {
struct nslog_cork_chain *next;
nslog_entry_t *entry;
} *nslog__cork_chain = NULL;
static nslog_callback nslog__cb = NULL;
static void *nslog__cb_ctx = NULL;
static nslog_category_t *nslog__all_categories = NULL;
const char *nslog_level_name(nslog_level level)
{
switch (level) {
case NSLOG_LEVEL_DEEPDEBUG:
return "DEEPDEBUG";
case NSLOG_LEVEL_DEBUG:
return "DEBUG";
case NSLOG_LEVEL_VERBOSE:
return "VERBOSE";
case NSLOG_LEVEL_INFO:
return "INFO";
case NSLOG_LEVEL_WARNING:
return "WARNING";
case NSLOG_LEVEL_ERROR:
return "ERROR";
case NSLOG_LEVEL_CRITICAL:
return "CRITICAL";
};
return "**UNKNOWN**";
}
static void nslog__normalise_category(nslog_category_t *cat)
{
if (cat->parent == NULL) {
cat->name = strdup(cat->cat_name);
} else {
nslog__normalise_category(cat->parent);
cat->name = malloc(strlen(cat->parent->name) + strlen(cat->cat_name) + 2);
strcpy(cat->name, cat->parent->name);
strcat(cat->name, "/");
strcat(cat->name, cat->cat_name);
cat->next = nslog__all_categories;
nslog__all_categories = cat;
}
}
static void nslog__deliver(nslog_entry_t *entry)
{
/* TODO: Add filtering here */
if (nslog__cb != NULL) {
if (entry->category->name == NULL) {
nslog__normalise_category(entry->category);
}
(*nslog__cb)(nslog__cb_ctx, entry);
}
}
void nslog__log(nslog_category_t *category,
nslog_level level,
const char *filename,
int lineno,
const char *funcname,
const char *pattern,
...)
{
va_list ap;
va_start(ap, pattern);
va_list ap2;
va_copy(ap2, ap);
int slen = vsnprintf(NULL, 0, pattern, ap);
va_end(ap);
nslog_entry_t *entry = malloc(sizeof(nslog_entry_t) + slen + 1);
if (entry == NULL) {
/* We're at ENOMEM! log entry is lost */
va_end(ap2);
return;
}
entry->category = category;
entry->level = level;
entry->filename = filename;
entry->funcname = funcname;
entry->lineno = lineno;
vsprintf(entry->message, pattern, ap2);
va_end(ap2);
if (nslog__corked) {
struct nslog_cork_chain *chained = malloc(sizeof(struct nslog_cork_chain));
if (chained == NULL) {
/* ENOMEM during corked operation! wow */
free(entry);
return;
}
chained->next = nslog__cork_chain;
chained->entry = entry;
nslog__cork_chain = chained;
} else {
/* Not corked */
nslog__deliver(entry);
free(entry);
}
}
nslog_error nslog_set_render_callback(nslog_callback cb, void *context)
{
nslog__cb = cb;
nslog__cb_ctx = context;
return NSLOG_NO_ERROR;
}
nslog_error nslog_uncork()
{
if (nslog__corked) {
while (nslog__cork_chain != NULL) {
struct nslog_cork_chain *ent = nslog__cork_chain;
nslog__cork_chain = ent->next;
nslog__deliver(ent->entry);
free(ent->entry);
free(ent);
}
nslog__corked = false;
}
return NSLOG_NO_ERROR;
}
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