feature:根据文件大小分割日志

src/handler/logging-handler-file.c

@@ -1,28 +1,73 @@
 #include "logging/logging-handler.h"
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+
+#define Handler_FILE_EX_PRT(fp)                                                \
+    ((log_Handler_file_ex_t *)(fp + sizeof(log_Handler)))
+
+typedef struct log_Handler_file_ex_s {
+    unsigned int file_size;
+    unsigned int file_size_max;
+    unsigned int suffix;
+    char        *file_name;
+} log_Handler_file_ex_t;
+
+static unsigned int getFileSize(FILE *fp) {
+    fseek(fp, 0L, SEEK_END);
+    return ftell(fp);
+}
 
 static void __freeFileHandler(log_Handler *handler) {
     fclose(handler->stream);
+    free(Handler_FILE_EX_PRT(handler)->file_name);
     free(handler);
 }
 
+static void changeFile(log_Handler *handler) {
+    log_Handler_file_ex_t *handler_ex = Handler_FILE_EX_PRT(handler);
+    fclose(handler->stream);
+    char new_file_name[30];
+    sprintf(new_file_name, "%s_%d.log", handler_ex->file_name, ++handler_ex->suffix);
+    handler->stream = fopen(new_file_name, "at");
+    handler_ex->file_size = getFileSize(handler->stream);
+}
+
 static void outputFileHandler(log_Handler *handler, const char *message) {
     fputs(message, handler->stream);
+    log_Handler_file_ex_t *handler_ex = Handler_FILE_EX_PRT(handler);
+    handler_ex->file_size += strlen(message);
+    if (handler_ex->file_size > handler_ex->file_size_max)
+        changeFile(handler);
 }
 
-log_Handler *loggingFileHandler(const char *name) {
-    char new_file_name[100];
-    sprintf(new_file_name, "%s.log", name);
+log_Handler *loggingFileHandler(const char *name, unsigned int max_size) {
+    char         new_file_name[30];
+    int          suffix = 0;
+    unsigned int file_size;
+    FILE        *fp;
 
-    FILE *fp             = fopen(new_file_name, "at");
+    do {
+        sprintf(new_file_name, "%s_%d.log", name, suffix++);
+        fp        = fopen(new_file_name, "at");
+        file_size = getFileSize(fp);
+    } while (file_size > max_size);
 
-    log_Handler *handler = (log_Handler *)malloc(sizeof(log_Handler));
+    /// 分配log_Handler与记录文件大小的空间
+    log_Handler           *handler = (log_Handler *)malloc(sizeof(log_Handler) +
+                                                 sizeof(log_Handler_file_ex_t));
 
-    handler->stream      = fp;
-    handler->apply_color = false;
-    handler->_free       = __freeFileHandler;
-    handler->output      = outputFileHandler;
+    log_Handler_file_ex_t *handler_ex = Handler_FILE_EX_PRT(handler);
+    handler_ex->file_size_max        = max_size;
+    handler_ex->file_size             = file_size;
+    handler_ex->suffix                = suffix;
+    handler_ex->file_name             = malloc(strlen(new_file_name) + 1);
+    strcpy(handler_ex->file_name, name);
+
+    handler->stream                   = fp;
+    handler->apply_color              = false;
+    handler->_free                    = __freeFileHandler;
+    handler->output                   = outputFileHandler;
 
     return handler;
 }