Merge branch 'release/0.0.1'

[catta] / src / util.c

diff --git a/src/util.c b/src/util.c
new file mode 100644 (file)
index 0000000..c3bb77a
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,120 @@
+/***
+  This file is part of catta.
+
+  catta is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+
+  catta is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
+  Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with catta; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <ctype.h>
+
+#include <catta/malloc.h>
+#include "util.h"
+
+void catta_hexdump(const void* p, size_t size) {
+    const uint8_t *c = p;
+    assert(p);
+
+    printf("Dumping %lu bytes from %p:\n", (unsigned long) size, p);
+
+    while (size > 0) {
+        unsigned i;
+
+        for (i = 0; i < 16; i++) {
+            if (i < size)
+                printf("%02x ", c[i]);
+            else
+                printf("   ");
+        }
+
+        for (i = 0; i < 16; i++) {
+            if (i < size)
+                printf("%c", c[i] >= 32 && c[i] < 127 ? c[i] : '.');
+            else
+                printf(" ");
+        }
+
+        printf("\n");
+
+        c += 16;
+
+        if (size <= 16)
+            break;
+
+        size -= 16;
+    }
+}
+
+char *catta_format_mac_address(char *r, size_t l, const uint8_t* mac, size_t size) {
+    char *t = r;
+    unsigned i;
+    static const char hex[] = "0123456789abcdef";
+
+    assert(r);
+    assert(l > 0);
+    assert(mac);
+
+    if (size <= 0) {
+        *r = 0;
+        return r;
+    }
+
+    for (i = 0; i < size; i++) {
+        if (l < 3)
+            break;
+
+        *(t++) = hex[*mac >> 4];
+        *(t++) = hex[*mac & 0xF];
+        *(t++) = ':';
+
+        l -= 3;
+
+        mac++;
+    }
+
+    if (t > r)
+        *(t-1) = 0;
+    else
+        *r = 0;
+
+    return r;
+}
+
+char *catta_strup(char *s) {
+    char *c;
+    assert(s);
+
+    for (c = s; *c; c++)
+        *c = (char) toupper(*c);
+
+    return s;
+}
+
+char *catta_strdown(char *s) {
+    char *c;
+    assert(s);
+
+    for (c = s; *c; c++)
+        *c = (char) tolower(*c);
+
+    return s;
+}