Diff: hexview.h

Revision:

0:2f61a610595e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hexview.h	Wed Dec 09 11:36:29 2009 +0000
@@ -0,0 +1,85 @@
+/* hexview functions
+ * Copyright (c) 2009 rmeyer
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+/* Function: hexview
+ *  Prints an array of char to stdout in hex.
+ *  The data is grouped in two 8 byte groups per line.
+ *  Each byte is displayed as 2 hex digits and every 
+ *  line starts with the address of the first byte.
+ *
+ *  There is no text view of a line.
+ *
+ * Variables:
+ *  buffer - The array to display.
+ *  size - The length of buffer.
+ */
+inline void hexview(const char *buffer, unsigned int size) {
+    for(int i = 0; i < size; ++i) {
+        if((i%16)!=0) {
+            printf(" ");
+        } else {
+            printf("%04X:  ", (i));
+        }
+        printf("%02hhx", buffer[i]);
+        if((i%16) ==  7) { 
+            printf(" ");
+        }
+        if((i%16) == 15) {
+            printf("\n");
+        }
+    }
+    printf("\n\n\n");
+}
+
+/* Function: hexview
+ *  Prints an array of char to stdout in hex.
+ *  The data is grouped in two 8 byte groups per line.
+ *  Each byte is displayed as 2 hex digits and every 
+ *  line starts with the address of the first byte.
+ *  Each line ends ub with an ASCII representation 
+ *  of the bytes.
+ *
+ *  This implementation takes more stack space than the other.
+ *  It will allocate two char arrays with a agregated size of 70 bytes.
+ *  Therefore its faster than the fierst implementation. 
+ *  It operates directly on the char arrays and make no use of 
+ *  string manipulation functions. printf is called one time a line.
+ *
+ * Variables:
+ *  buffer - The array to display.
+ *  size - The length of buffer.
+ */
+inline void hexview2(const char *buffer, unsigned int size) {
+    char byte[50];
+    char text[20];
+    bool big = false;
+    int i;
+    for(i = 0; i < size; ++i) {
+        if((i&0xF) == 0x0) {
+            if(big)
+                printf("%04X: %-49s: %-20s\n", (i&~0xF), byte, text);
+            big = false;
+            byte[0] = '\0';
+            text[0] = '\0';
+        } else if((i&0xF) == 0x8) {
+            big = true;
+            byte[(i&0xF) * 3] = ' ';
+            text[(i&0xF)] = ' ';
+        }
+        unsigned char value = buffer[i];
+        text[(i&0xF) + 0 + big] = (value < 0x20 || value > 0x7F)? '.': value;
+        text[(i&0xF) + 1 + big] = '\0';
+        value = (buffer[i] &0xF0) >> 4;
+        byte[(i&0xF) * 3 + 0 + big] = (value < 0xA)? (value + 0x30): (value + 0x37);
+        value = (buffer[i] &0x0F);
+        byte[(i&0xF) * 3 + 1 + big] = (value < 0xA)? (value + 0x30): (value + 0x37);
+        byte[(i&0xF) * 3 + 2 + big] = ' ';
+        byte[(i&0xF) * 3 + 3 + big] = '\0';
+    }
+    if(byte[0]) {
+        printf("%04X: %-49s: %-20s\n", (i&~0xF), byte, text);
+    }
+    printf("\n");
+}
\ No newline at end of file