C语言环境下的文件读写
目的：熟悉C的文件读写，emwin中用到log输出
环境：VC6.0++
补充：
- 据说VC6.0不支持多参数宏定义，支持要C99以上才可以
- vc6.0库函数和头文件
代码：
其他测试main.c文件如下
1 #include <stdio.h> 2 #include <string.h> 3 4 void test_write(void) 5 { 6 FILE *fp = NULL; 7 char name[] = "mrsandstorm"; 8 9 fp = fopen("test.txt","w"); 10 11 if( fp == NULL) 12 { 13 printf("can't open the file"); 14 return; 15 } 16 17 if (fwrite(name, sizeof(char), strlen(name) ,fp) != strlen(name)) 18 { 19 printf("file write error\n"); 20 } 21 fclose(fp); 22 } 23 24 void main(void) 25 { 26 printf("start.\n"); 27 test_write(); 28 printf("end.\n"); 29 }
main.c文件内容如下
1 #include "includes.h" 2 3 #ifdef USE_EMWIN_VC6 4 #define MAIN_DEBUG_LOG LOG_DEBUG_SET_LEVLE(1) 5 #else 6 #define MAIN_DEBUG_LOG (1) 7 #endif 8 9 int main(void) 10 { 11 print_cond(MAIN_DEBUG_LOG,"END\n"); 12 13 return 0; 14 }
includes.h文件内容如下
1 #ifndef __INCLUDES_H__ 2 #define __INCLUDES_H__ 3 4 #include <stdio.h> 5 #include <stdarg.h> 6 #include <string.h> 7 #include <time.h> 8 9 #include "fs_log.h" 10 11 #define USE_EMWIN_VC6 12 13 #endif
fs_log.c文件内容如下
1 #include "fs_log.h" 2 3 void write_log (const char *format, ...) 4 { 5 va_list arg; 6 int done; 7 time_t time_log; 8 struct tm* tm_log; 9 FILE* pFile = NULL; 10 #if LOG_HAVE_WINDOW_OUT 11 char buff[300]; 12 int off = 0; 13 #endif 14 15 va_start (arg, format); 16 17 time_log = time(NULL); 18 tm_log = localtime(&time_log); 19 20 pFile = fopen(LOG_FILE, "a"); 21 22 fprintf(pFile,"%04d-%02d-%02d %02d:%02d:%02d :", 23 tm_log->tm_year + 1900, tm_log->tm_mon + 1, tm_log->tm_mday, 24 tm_log->tm_hour, tm_log->tm_min, tm_log->tm_sec); 25 done = vfprintf (pFile, format, arg); 26 va_end (arg); 27 fflush(pFile); 28 29 fclose(pFile); 30 31 #if LOG_HAVE_WINDOW_OUT 32 memset(buff, 0, sizeof(buff)); 33 off = sprintf(buff, "%04d-%02d-%02d %02d:%02d:%02d [%s][%d]:", 34 tm_log->tm_year + 1900, tm_log->tm_mon + 1, tm_log->tm_mday, 35 tm_log->tm_hour, tm_log->tm_min, tm_log->tm_sec); 36 sprintf(buff+off, format, arg); 37 printf("%s",buff); 38 #endif 39 40 return; 41 } 42 43 void write_log_cond(char valve, char *file_nameconst, int len, char *format, ...) 44 { 45 va_list arg; 46 int done; 47 time_t time_log; 48 struct tm* tm_log; 49 FILE* pFile = NULL; 50 #if LOG_HAVE_WINDOW_OUT 51 char buff[300]; 52 int off = 0; 53 #endif 54 55 if (valve == 0) 56 { 57 return; 58 } 59 va_start (arg, format); 60 61 time_log = time(NULL); 62 tm_log = localtime(&time_log); 63 64 pFile = fopen(LOG_FILE, "a"); 65 66 fprintf(pFile,"%04d-%02d-%02d %02d:%02d:%02d [%s][%d]:", 67 tm_log->tm_year + 1900, tm_log->tm_mon + 1, tm_log->tm_mday, 68 tm_log->tm_hour, tm_log->tm_min, tm_log->tm_sec, 69 file_nameconst,len); 70 done = vfprintf (pFile, format, arg); 71 va_end (arg); 72 fflush(pFile); 73 74 fclose(pFile); 75 76 #if LOG_HAVE_WINDOW_OUT 77 memset(buff, 0, sizeof(buff)); 78 off = sprintf(buff, "%04d-%02d-%02d %02d:%02d:%02d [%s][%d]:", 79 tm_log->tm_year + 1900, tm_log->tm_mon + 1, tm_log->tm_mday, 80 tm_log->tm_hour, tm_log->tm_min, tm_log->tm_sec, 81 file_nameconst,len); 82 sprintf(buff+off, format, arg); 83 printf("%s",buff); 84 #endif 85 86 return; 87 }
fs_log.h文件内容如下
#ifndef __FS_LOG_H__ #define __FS_LOG_H__ #include <stdio.h> #include <stdarg.h> #include <string.h> #include <time.h> #define LOG_FILE "./runlog.txt" #define LOG_HAVE_WINDOW_OUT (1) #define SHORT_FILE strrchr(__FILE__, '\\') ? strrchr(__FILE__, '\\') + 1 : __FILE__ #define LOG_DEBUG_SET_LEVLE(a) (a),(SHORT_FILE),(__LINE__) #define print_deb write_log #define print_info write_log #define print_war write_log #define print_err write_log #define print_cond write_log_cond extern void write_log (const char *format, ...); extern void write_log_cond (char valve, char *file_nameconst, int len, char *format, ...); #endif
