Diff: ReadTime.h

Revision:

3:82b68ab94e3e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ReadTime.h	Tue Dec 13 10:00:51 2016 +0000
@@ -0,0 +1,85 @@
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+
+char ToHex(int num) {
+    if (num < 0 && num > 15) {
+        return '!';
+    }
+    else if (num < 10) {
+        return num + 48;
+    }
+    else {
+        switch (num) {
+        case 10: return 'A';
+        case 11: return 'B';
+        case 12: return 'C';
+        case 13: return 'D';
+        case 14: return 'E';
+        case 15: return 'F';
+        }
+    }
+    return '?';
+}
+
+int ToDec(char *str) {
+    int num = 0;
+    bool flag = true;
+    int len = strlen(str);
+    for (int i = 0; i < len; i++) {
+        if (flag && str[i] == '0') {
+            continue;
+        }
+        flag = false;
+        if (str[i] > '9') {
+            num = 16 * num + (str[i] - 55);
+        }
+        else {
+            num = 16 * num + (str[i] - '0');
+        }
+    }
+    return num;
+}
+
+double ReadTime(const char *path) {
+    char size[9];
+    char byteRate[9];
+    unsigned char ch[100];
+    FILE *file;
+
+    file = fopen(path,"rb");
+    
+    for (int i = 0; i < 58; i++) {
+        ch[i] = fgetc(file);
+    }
+
+    for (int i = 7, j = 0; i >= 4; i--, j += 2) {
+        if (ch[i] < 16) {
+            size[j] = '0';
+            size[j + 1] = ToHex(ch[i]);
+        }
+        else {
+            size[j] = ToHex(ch[i] / 16);
+            size[j + 1] = ToHex(ch[i] % 16);
+        }
+    }
+    size[8] = '\0';
+
+    for (int i = 31, j = 0; i > 27; i--, j += 2) {
+        if (ch[i] < 16) {
+            byteRate[j] = '0';
+            byteRate[j + 1] = ToHex(ch[i]);
+        }
+        else {
+            byteRate[j] = ToHex(ch[i] / 16);
+            byteRate[j + 1] = ToHex(ch[i] % 16);
+        }
+    }
+    byteRate[8] = '\0';
+
+    int n_size = ToDec(size);
+    int n_byteRate = ToDec(byteRate);
+    double time = (double)n_size / (double)n_byteRate;
+    
+    return time;
+}
\ No newline at end of file