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113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/*********************************************************************************************************
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* ------------------------------------------------------------------------------------------------------
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* file description
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* ------------------------------------------------------------------------------------------------------
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* \file vlog.c
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* \unit vlog
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* \brief This is a simple log module for C language
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* \author Lamdonn
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* \version v1.0.0
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* \license GPL-2.0
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* \copyright Copyright (C) 2023 Lamdonn.
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********************************************************************************************************/
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#include "vlog.h"
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#include <stdio.h>
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static char channel_table = VLOG_CHANNEL_0; /* Channel configuration, default only opens channel 0 */
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static char vlog_buffer[VLOG_BUFFER_SIZE]; /* vlog output buffer */
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static vlog_func_t vlog_func = 0; /* Additional vlog callback function */
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static FILE *vlog_file = 0; /* Offline recorded files */
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/**
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* \brief output log information
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* \param[in] channel: VLOG_CHANNEL_XXX, from 0 to 7
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* \param[in] format: format string
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* \param[in] ...: format parameters
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* \return log string length
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*/
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int vlog(char channel, const char *format, ...)
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{
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int len = 0;
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va_list args;
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/* Check channel effectiveness */
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if (channel & channel_table)
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{
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va_start(args, format);
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len = vsnprintf(vlog_buffer, sizeof(vlog_buffer), format, args);
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/* Output to default console */
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printf(vlog_buffer);
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/* Output to offline file */
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if (vlog_file) fwrite(vlog_buffer, sizeof(char), len, vlog_file);
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/* Output to callback function */
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if (vlog_func) vlog_func(vlog_buffer, len);
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va_end(args);
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}
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return len;
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}
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/**
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* \brief set vlog channel configuration
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* \param[in] channel: VLOG_CHANNEL_XXX, from 0 to 7, multiple channels can be selected through `|`
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* \return none
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*/
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void vlog_set_channel(char channel)
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{
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channel_table = channel;
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}
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/**
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* \brief get vlog channel configuration
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* \return channel configuration
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*/
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char vlog_get_channel(void)
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{
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return channel_table;
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}
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/**
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* \brief start vlog offline save, need to be used in pairs with vlog_stop_offline()
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* \param[in] *filename: offline save file name
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* \return 1 success or 0 fail
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*/
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int vlog_start_offline(const char *filename)
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{
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FILE *file;
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file = fopen(filename, "a+");
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if (!file) return 0;
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vlog_file = file;
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return 1;
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}
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/**
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* \brief stop vlog offline save, need to be used in pairs with vlog_start_offline()
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* \return none
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*/
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void vlog_stop_offline(void)
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{
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if (vlog_file)
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{
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fclose(vlog_file);
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vlog_file = 0;
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}
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}
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/**
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* \brief set additional vlog callback function
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* \return none
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*/
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void vlog_set_func(vlog_func_t func)
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{
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vlog_func = func;
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}
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