Diff: main_util.cpp

Revision:

2:20ecfe6edd71

Child:

3:5add3759e08a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_util.cpp	Wed Feb 18 15:02:16 2015 +0000
@@ -0,0 +1,69 @@
+#include "main_util.hpp"
+
+void check_file_open(FILE* file_p, const char* file_name)
+{
+    if ( file_p == NULL ) {
+        fprintf( stderr, "Error : file %s open faild. \r\n", file_name );
+        exit(1);
+    }
+}
+
+// データ系列ファイルの行数をLEN_DATA_SEQUENCEまで切り詰める
+void truncate_data_file(void)
+{
+    FILE* dat_file_fp;
+    const char tmp_file_name[] = "/local/TMP_DAT.CSV";
+    int line;
+    char trunc_buf_str[BUF_SIZE];
+    // 最初に現在の行数を数える
+    dat_file_fp = fopen( SEQUENCE_DATA_NAME, "r");
+    check_file_open( dat_file_fp, SEQUENCE_DATA_NAME);
+    line = 0;
+    while(fgets(trunc_buf_str, BUF_SIZE, dat_file_fp) != NULL) {
+        line++;
+        // printf("line %d : %s\r\n", line, trunc_buf_str);
+    }
+    // printf("current num of line : %d \r\n", line);
+    fclose( dat_file_fp );
+
+    // 切り詰め開始
+    if ( line > LEN_DATA_SEQUENCE ) {
+        FILE* tmp_fp;
+        int diff_line = line - LEN_DATA_SEQUENCE;
+        dat_file_fp = fopen(SEQUENCE_DATA_NAME, "r");
+        check_file_open( dat_file_fp, SEQUENCE_DATA_NAME );
+        line = 0;
+        while(fgets(trunc_buf_str, BUF_SIZE, dat_file_fp) != NULL) {
+            line++;
+            if (line == diff_line) break;
+        }
+        // diff_line以降をテンポラリにコピー
+        tmp_fp = fopen( tmp_file_name, "w");
+        check_file_open( tmp_fp, tmp_file_name );
+        fflush( tmp_fp );
+        fflush( dat_file_fp );
+        while( fgets( trunc_buf_str, BUF_SIZE, dat_file_fp) != NULL) {
+            fputs( trunc_buf_str, tmp_fp);
+        }
+        //fclose( tmp_fp );
+        //fclose( dat_file_fp );
+
+        // 更新
+        tmp_fp = freopen( tmp_file_name, "r", tmp_fp);
+        check_file_open( tmp_fp, tmp_file_name );
+        dat_file_fp = freopen(SEQUENCE_DATA_NAME, "w", dat_file_fp);
+        check_file_open( dat_file_fp, SEQUENCE_DATA_NAME );
+        // 一時ファイルからコピー
+        fflush( tmp_fp );
+        fflush( dat_file_fp );
+        while( fgets( trunc_buf_str, BUF_SIZE, tmp_fp) != NULL) {
+            fputs( trunc_buf_str, dat_file_fp);
+        }
+
+        fclose( dat_file_fp );
+        fclose( tmp_fp );
+
+        // テンポラリの削除
+        remove( tmp_file_name );
+    }
+}
\ No newline at end of file