713 lines
17 KiB
C
713 lines
17 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/** \file
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* \ingroup clog
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*/
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <assert.h>
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/* Disable for small single threaded programs
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* to avoid having to link with pthreads. */
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#ifdef WITH_CLOG_PTHREADS
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# include <pthread.h>
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# include "atomic_ops.h"
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#endif
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/* For 'isatty' to check for color. */
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#if defined(__unix__) || defined(__APPLE__) || defined(__HAIKU__)
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# include <unistd.h>
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# include <sys/time.h>
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#endif
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#if defined(_MSC_VER)
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# include <io.h>
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# include <windows.h>
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#endif
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/* For printing timestamp. */
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#define __STDC_FORMAT_MACROS
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#include <inttypes.h>
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/* Only other dependency (could use regular malloc too). */
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#include "MEM_guardedalloc.h"
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/* own include. */
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#include "CLG_log.h"
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/* Local utility defines */
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#define STREQ(a, b) (strcmp(a, b) == 0)
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#define STREQLEN(a, b, n) (strncmp(a, b, n) == 0)
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#ifdef _WIN32
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# define PATHSEP_CHAR '\\'
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#else
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# define PATHSEP_CHAR '/'
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#endif
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/* -------------------------------------------------------------------- */
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/** \name Internal Types
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* \{ */
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typedef struct CLG_IDFilter {
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struct CLG_IDFilter *next;
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/** Over alloc. */
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char match[0];
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} CLG_IDFilter;
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typedef struct CLogContext {
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/** Single linked list of types. */
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CLG_LogType *types;
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#ifdef WITH_CLOG_PTHREADS
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pthread_mutex_t types_lock;
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#endif
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/* exclude, include filters. */
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CLG_IDFilter *filters[2];
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bool use_color;
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bool use_basename;
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bool use_timestamp;
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/** Borrowed, not owned. */
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int output;
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FILE *output_file;
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/** For timer (use_timestamp). */
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uint64_t timestamp_tick_start;
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/** For new types. */
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struct {
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int level;
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} default_type;
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struct {
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void (*fatal_fn)(void *file_handle);
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void (*backtrace_fn)(void *file_handle);
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} callbacks;
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} CLogContext;
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Mini Buffer Functionality
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*
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* Use so we can do a single call to write.
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* \{ */
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#define CLOG_BUF_LEN_INIT 512
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typedef struct CLogStringBuf {
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char *data;
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uint len;
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uint len_alloc;
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bool is_alloc;
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} CLogStringBuf;
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static void clg_str_init(CLogStringBuf *cstr, char *buf_stack, uint buf_stack_len)
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{
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cstr->data = buf_stack;
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cstr->len_alloc = buf_stack_len;
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cstr->len = 0;
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cstr->is_alloc = false;
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}
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static void clg_str_free(CLogStringBuf *cstr)
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{
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if (cstr->is_alloc) {
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MEM_freeN(cstr->data);
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}
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}
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static void clg_str_reserve(CLogStringBuf *cstr, const uint len)
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{
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if (len > cstr->len_alloc) {
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cstr->len_alloc *= 2;
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if (len > cstr->len_alloc) {
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cstr->len_alloc = len;
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}
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if (cstr->is_alloc) {
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cstr->data = MEM_reallocN(cstr->data, cstr->len_alloc);
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}
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else {
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/* Copy the static buffer. */
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char *data = MEM_mallocN(cstr->len_alloc, __func__);
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memcpy(data, cstr->data, cstr->len);
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cstr->data = data;
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cstr->is_alloc = true;
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}
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cstr->len_alloc = len;
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}
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}
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static void clg_str_append_with_len(CLogStringBuf *cstr, const char *str, const uint len)
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{
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uint len_next = cstr->len + len;
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clg_str_reserve(cstr, len_next);
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char *str_dst = cstr->data + cstr->len;
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memcpy(str_dst, str, len);
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#if 0 /* no need. */
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str_dst[len] = '\0';
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#endif
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cstr->len = len_next;
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}
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static void clg_str_append(CLogStringBuf *cstr, const char *str)
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{
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clg_str_append_with_len(cstr, str, strlen(str));
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}
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static void clg_str_vappendf(CLogStringBuf *cstr, const char *fmt, va_list args)
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{
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/* Use limit because windows may use '-1' for a formatting error. */
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const uint len_max = 65535;
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uint len_avail = (cstr->len_alloc - cstr->len);
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if (len_avail == 0) {
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len_avail = CLOG_BUF_LEN_INIT;
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clg_str_reserve(cstr, len_avail);
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}
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while (true) {
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va_list args_cpy;
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va_copy(args_cpy, args);
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int retval = vsnprintf(cstr->data + cstr->len, len_avail, fmt, args_cpy);
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va_end(args_cpy);
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if (retval != -1) {
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cstr->len += retval;
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break;
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}
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else {
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len_avail *= 2;
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if (len_avail >= len_max) {
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break;
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}
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clg_str_reserve(cstr, len_avail);
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}
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}
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Internal Utilities
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* \{ */
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enum eCLogColor {
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COLOR_DEFAULT,
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COLOR_RED,
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COLOR_GREEN,
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COLOR_YELLOW,
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COLOR_RESET,
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};
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#define COLOR_LEN (COLOR_RESET + 1)
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static const char *clg_color_table[COLOR_LEN] = {NULL};
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static void clg_color_table_init(bool use_color)
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{
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for (int i = 0; i < COLOR_LEN; i++) {
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clg_color_table[i] = "";
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}
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if (use_color) {
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#ifdef _WIN32
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/* TODO */
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#else
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clg_color_table[COLOR_DEFAULT] = "\033[1;37m";
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clg_color_table[COLOR_RED] = "\033[1;31m";
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clg_color_table[COLOR_GREEN] = "\033[1;32m";
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clg_color_table[COLOR_YELLOW] = "\033[1;33m";
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clg_color_table[COLOR_RESET] = "\033[0m";
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#endif
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}
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}
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static const char *clg_severity_str[CLG_SEVERITY_LEN] = {
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[CLG_SEVERITY_INFO] = "INFO",
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[CLG_SEVERITY_WARN] = "WARN",
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[CLG_SEVERITY_ERROR] = "ERROR",
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[CLG_SEVERITY_FATAL] = "FATAL",
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};
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static const char *clg_severity_as_text(enum CLG_Severity severity)
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{
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bool ok = (unsigned int)severity < CLG_SEVERITY_LEN;
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assert(ok);
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if (ok) {
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return clg_severity_str[severity];
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}
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else {
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return "INVALID_SEVERITY";
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}
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}
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static enum eCLogColor clg_severity_to_color(enum CLG_Severity severity)
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{
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assert((unsigned int)severity < CLG_SEVERITY_LEN);
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enum eCLogColor color = COLOR_DEFAULT;
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switch (severity) {
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case CLG_SEVERITY_INFO:
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color = COLOR_DEFAULT;
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break;
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case CLG_SEVERITY_WARN:
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color = COLOR_YELLOW;
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break;
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case CLG_SEVERITY_ERROR:
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case CLG_SEVERITY_FATAL:
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color = COLOR_RED;
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break;
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default:
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/* should never get here. */
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assert(false);
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}
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return color;
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Context Type Access
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* \{ */
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/**
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* Filter the indentifier based on very basic globbing.
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* - `foo` exact match of `foo`.
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* - `foo.bar` exact match for `foo.bar`
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* - `foo.*` match for `foo` & `foo.bar` & `foo.bar.baz`
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* - `*` matches everything.
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*/
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static bool clg_ctx_filter_check(CLogContext *ctx, const char *identifier)
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{
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const int identifier_len = strlen(identifier);
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for (uint i = 0; i < 2; i++) {
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const CLG_IDFilter *flt = ctx->filters[i];
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while (flt != NULL) {
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const int len = strlen(flt->match);
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if (STREQ(flt->match, "*") ||
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((len == identifier_len) && (STREQ(identifier, flt->match))))
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{
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return (bool)i;
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}
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if ((len >= 2) && (STREQLEN(".*", &flt->match[len - 2], 2))) {
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if (((identifier_len == len - 2) && STREQLEN(identifier, flt->match, len - 2)) ||
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((identifier_len >= len - 1) && STREQLEN(identifier, flt->match, len - 1)))
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{
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return (bool)i;
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}
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}
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flt = flt->next;
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}
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}
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return false;
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}
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/**
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* \note This should never be called per logging call.
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* Searching is only to get an initial handle.
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*/
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static CLG_LogType *clg_ctx_type_find_by_name(CLogContext *ctx, const char *identifier)
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{
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for (CLG_LogType *ty = ctx->types; ty; ty = ty->next) {
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if (STREQ(identifier, ty->identifier)) {
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return ty;
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}
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}
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return NULL;
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}
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static CLG_LogType *clg_ctx_type_register(CLogContext *ctx, const char *identifier)
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{
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assert(clg_ctx_type_find_by_name(ctx, identifier) == NULL);
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CLG_LogType *ty = MEM_callocN(sizeof(*ty), __func__);
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ty->next = ctx->types;
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ctx->types = ty;
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strncpy(ty->identifier, identifier, sizeof(ty->identifier) - 1);
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ty->ctx = ctx;
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ty->level = ctx->default_type.level;
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if (clg_ctx_filter_check(ctx, ty->identifier)) {
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ty->flag |= CLG_FLAG_USE;
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}
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return ty;
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}
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static void clg_ctx_fatal_action(CLogContext *ctx)
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{
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if (ctx->callbacks.fatal_fn != NULL) {
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ctx->callbacks.fatal_fn(ctx->output_file);
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}
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fflush(ctx->output_file);
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abort();
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}
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static void clg_ctx_backtrace(CLogContext *ctx)
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{
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/* Note: we avoid writing fo 'FILE', for backtrace we make an exception,
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* if necessary we could have a version of the callback that writes to file descriptor all at once. */
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ctx->callbacks.backtrace_fn(ctx->output_file);
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fflush(ctx->output_file);
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}
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static uint64_t clg_timestamp_ticks_get(void)
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{
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uint64_t tick;
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#if defined(_MSC_VER)
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tick = GetTickCount64();
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#else
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struct timeval tv;
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gettimeofday(&tv, NULL);
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tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
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#endif
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return tick;
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Logging API
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* \{ */
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static void write_timestamp(CLogStringBuf *cstr, const uint64_t timestamp_tick_start)
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{
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char timestamp_str[64];
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const uint64_t timestamp = clg_timestamp_ticks_get() - timestamp_tick_start;
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const uint timestamp_len = snprintf(
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timestamp_str, sizeof(timestamp_str), "%" PRIu64 ".%03u ",
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timestamp / 1000, (uint)(timestamp % 1000));
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clg_str_append_with_len(cstr, timestamp_str, timestamp_len);
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}
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static void write_severity(CLogStringBuf *cstr, enum CLG_Severity severity, bool use_color)
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{
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assert((unsigned int)severity < CLG_SEVERITY_LEN);
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if (use_color) {
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enum eCLogColor color = clg_severity_to_color(severity);
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clg_str_append(cstr, clg_color_table[color]);
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clg_str_append(cstr, clg_severity_as_text(severity));
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clg_str_append(cstr, clg_color_table[COLOR_RESET]);
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}
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else {
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clg_str_append(cstr, clg_severity_as_text(severity));
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}
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}
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static void write_type(CLogStringBuf *cstr, CLG_LogType *lg)
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{
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clg_str_append(cstr, " (");
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clg_str_append(cstr, lg->identifier);
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clg_str_append(cstr, "): ");
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}
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static void write_file_line_fn(CLogStringBuf *cstr, const char *file_line, const char *fn, const bool use_basename)
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{
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uint file_line_len = strlen(file_line);
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if (use_basename) {
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uint file_line_offset = file_line_len;
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while (file_line_offset-- > 0) {
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if (file_line[file_line_offset] == PATHSEP_CHAR) {
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file_line_offset++;
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break;
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}
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}
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file_line += file_line_offset;
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file_line_len -= file_line_offset;
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}
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clg_str_append_with_len(cstr, file_line, file_line_len);
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clg_str_append(cstr, " ");
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clg_str_append(cstr, fn);
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clg_str_append(cstr, ": ");
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}
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void CLG_log_str(
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CLG_LogType *lg, enum CLG_Severity severity, const char *file_line, const char *fn,
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const char *message)
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{
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CLogStringBuf cstr;
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char cstr_stack_buf[CLOG_BUF_LEN_INIT];
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clg_str_init(&cstr, cstr_stack_buf, sizeof(cstr_stack_buf));
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if (lg->ctx->use_timestamp) {
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write_timestamp(&cstr, lg->ctx->timestamp_tick_start);
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}
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write_severity(&cstr, severity, lg->ctx->use_color);
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write_type(&cstr, lg);
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{
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write_file_line_fn(&cstr, file_line, fn, lg->ctx->use_basename);
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clg_str_append(&cstr, message);
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}
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clg_str_append(&cstr, "\n");
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/* could be optional */
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int bytes_written = write(lg->ctx->output, cstr.data, cstr.len);
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(void)bytes_written;
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clg_str_free(&cstr);
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if (lg->ctx->callbacks.backtrace_fn) {
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clg_ctx_backtrace(lg->ctx);
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}
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if (severity == CLG_SEVERITY_FATAL) {
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clg_ctx_fatal_action(lg->ctx);
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}
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}
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void CLG_logf(
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CLG_LogType *lg, enum CLG_Severity severity, const char *file_line, const char *fn,
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const char *fmt, ...)
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{
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CLogStringBuf cstr;
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char cstr_stack_buf[CLOG_BUF_LEN_INIT];
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clg_str_init(&cstr, cstr_stack_buf, sizeof(cstr_stack_buf));
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if (lg->ctx->use_timestamp) {
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write_timestamp(&cstr, lg->ctx->timestamp_tick_start);
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}
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write_severity(&cstr, severity, lg->ctx->use_color);
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write_type(&cstr, lg);
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{
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write_file_line_fn(&cstr, file_line, fn, lg->ctx->use_basename);
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va_list ap;
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va_start(ap, fmt);
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clg_str_vappendf(&cstr, fmt, ap);
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va_end(ap);
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}
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clg_str_append(&cstr, "\n");
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/* could be optional */
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int bytes_written = write(lg->ctx->output, cstr.data, cstr.len);
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(void)bytes_written;
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clg_str_free(&cstr);
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if (lg->ctx->callbacks.backtrace_fn) {
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clg_ctx_backtrace(lg->ctx);
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}
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if (severity == CLG_SEVERITY_FATAL) {
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clg_ctx_fatal_action(lg->ctx);
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}
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Logging Context API
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* \{ */
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static void CLG_ctx_output_set(CLogContext *ctx, void *file_handle)
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{
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ctx->output_file = file_handle;
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ctx->output = fileno(ctx->output_file);
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#if defined(__unix__) || defined(__APPLE__)
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ctx->use_color = isatty(ctx->output);
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#endif
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}
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|
static void CLG_ctx_output_use_basename_set(CLogContext *ctx, int value)
|
|
{
|
|
ctx->use_basename = (bool)value;
|
|
}
|
|
|
|
static void CLG_ctx_output_use_timestamp_set(CLogContext *ctx, int value)
|
|
{
|
|
ctx->use_timestamp = (bool)value;
|
|
if (ctx->use_timestamp) {
|
|
ctx->timestamp_tick_start = clg_timestamp_ticks_get();
|
|
}
|
|
}
|
|
|
|
/** Action on fatal severity. */
|
|
static void CLG_ctx_fatal_fn_set(CLogContext *ctx, void (*fatal_fn)(void *file_handle))
|
|
{
|
|
ctx->callbacks.fatal_fn = fatal_fn;
|
|
}
|
|
|
|
static void CLG_ctx_backtrace_fn_set(CLogContext *ctx, void (*backtrace_fn)(void *file_handle))
|
|
{
|
|
ctx->callbacks.backtrace_fn = backtrace_fn;
|
|
}
|
|
|
|
static void clg_ctx_type_filter_append(CLG_IDFilter **flt_list, const char *type_match, int type_match_len)
|
|
{
|
|
if (type_match_len == 0) {
|
|
return;
|
|
}
|
|
CLG_IDFilter *flt = MEM_callocN(sizeof(*flt) + (type_match_len + 1), __func__);
|
|
flt->next = *flt_list;
|
|
*flt_list = flt;
|
|
memcpy(flt->match, type_match, type_match_len);
|
|
/* no need to null terminate since we calloc'd */
|
|
}
|
|
|
|
static void CLG_ctx_type_filter_exclude(CLogContext *ctx, const char *type_match, int type_match_len)
|
|
{
|
|
clg_ctx_type_filter_append(&ctx->filters[0], type_match, type_match_len);
|
|
}
|
|
|
|
static void CLG_ctx_type_filter_include(CLogContext *ctx, const char *type_match, int type_match_len)
|
|
{
|
|
clg_ctx_type_filter_append(&ctx->filters[1], type_match, type_match_len);
|
|
}
|
|
|
|
static void CLG_ctx_level_set(CLogContext *ctx, int level)
|
|
{
|
|
ctx->default_type.level = level;
|
|
for (CLG_LogType *ty = ctx->types; ty; ty = ty->next) {
|
|
ty->level = level;
|
|
}
|
|
}
|
|
|
|
static CLogContext *CLG_ctx_init(void)
|
|
{
|
|
CLogContext *ctx = MEM_callocN(sizeof(*ctx), __func__);
|
|
#ifdef WITH_CLOG_PTHREADS
|
|
pthread_mutex_init(&ctx->types_lock, NULL);
|
|
#endif
|
|
ctx->use_color = true;
|
|
ctx->default_type.level = 1;
|
|
CLG_ctx_output_set(ctx, stdout);
|
|
|
|
return ctx;
|
|
}
|
|
|
|
static void CLG_ctx_free(CLogContext *ctx)
|
|
{
|
|
while (ctx->types != NULL) {
|
|
CLG_LogType *item = ctx->types;
|
|
ctx->types = item->next;
|
|
MEM_freeN(item);
|
|
}
|
|
|
|
for (uint i = 0; i < 2; i++) {
|
|
while (ctx->filters[i] != NULL) {
|
|
CLG_IDFilter *item = ctx->filters[i];
|
|
ctx->filters[i] = item->next;
|
|
MEM_freeN(item);
|
|
}
|
|
}
|
|
#ifdef WITH_CLOG_PTHREADS
|
|
pthread_mutex_destroy(&ctx->types_lock);
|
|
#endif
|
|
MEM_freeN(ctx);
|
|
}
|
|
|
|
/** \} */
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/** \name Public Logging API
|
|
*
|
|
* Currently uses global context.
|
|
* \{ */
|
|
|
|
/* We could support multiple at once, for now this seems not needed. */
|
|
static struct CLogContext *g_ctx = NULL;
|
|
|
|
void CLG_init(void)
|
|
{
|
|
g_ctx = CLG_ctx_init();
|
|
|
|
clg_color_table_init(g_ctx->use_color);
|
|
}
|
|
|
|
void CLG_exit(void)
|
|
{
|
|
CLG_ctx_free(g_ctx);
|
|
}
|
|
|
|
void CLG_output_set(void *file_handle)
|
|
{
|
|
CLG_ctx_output_set(g_ctx, file_handle);
|
|
}
|
|
|
|
void CLG_output_use_basename_set(int value)
|
|
{
|
|
CLG_ctx_output_use_basename_set(g_ctx, value);
|
|
}
|
|
|
|
void CLG_output_use_timestamp_set(int value)
|
|
{
|
|
CLG_ctx_output_use_timestamp_set(g_ctx, value);
|
|
}
|
|
|
|
void CLG_fatal_fn_set(void (*fatal_fn)(void *file_handle))
|
|
{
|
|
CLG_ctx_fatal_fn_set(g_ctx, fatal_fn);
|
|
}
|
|
|
|
void CLG_backtrace_fn_set(void (*fatal_fn)(void *file_handle))
|
|
{
|
|
CLG_ctx_backtrace_fn_set(g_ctx, fatal_fn);
|
|
}
|
|
|
|
void CLG_type_filter_exclude(const char *type_match, int type_match_len)
|
|
{
|
|
CLG_ctx_type_filter_exclude(g_ctx, type_match, type_match_len);
|
|
}
|
|
|
|
void CLG_type_filter_include(const char *type_match, int type_match_len)
|
|
{
|
|
CLG_ctx_type_filter_include(g_ctx, type_match, type_match_len);
|
|
}
|
|
|
|
void CLG_level_set(int level)
|
|
{
|
|
CLG_ctx_level_set(g_ctx, level);
|
|
}
|
|
|
|
|
|
/** \} */
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/** \name Logging Reference API
|
|
* Use to avoid lookups each time.
|
|
* \{ */
|
|
|
|
void CLG_logref_init(CLG_LogRef *clg_ref)
|
|
{
|
|
#ifdef WITH_CLOG_PTHREADS
|
|
/* Only runs once when initializing a static type in most cases. */
|
|
pthread_mutex_lock(&g_ctx->types_lock);
|
|
#endif
|
|
if (clg_ref->type == NULL) {
|
|
CLG_LogType *clg_ty = clg_ctx_type_find_by_name(g_ctx, clg_ref->identifier);
|
|
if (clg_ty == NULL) {
|
|
clg_ty = clg_ctx_type_register(g_ctx, clg_ref->identifier);
|
|
}
|
|
#ifdef WITH_CLOG_PTHREADS
|
|
atomic_cas_ptr((void **)&clg_ref->type, clg_ref->type, clg_ty);
|
|
#else
|
|
clg_ref->type = clg_ty;
|
|
#endif
|
|
}
|
|
#ifdef WITH_CLOG_PTHREADS
|
|
pthread_mutex_unlock(&g_ctx->types_lock);
|
|
#endif
|
|
}
|
|
|
|
/** \} */
|