1 files changed, 95 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/libutil/base64.c b/contrib/syslinux-4.02/com32/libutil/base64.c
new file mode 100644
index 0000000..74b101c
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/libutil/base64.c
@@ -0,0 +1,95 @@
+/*
+ * Output a base64 string.
+ *
+ * Options include:
+ * - Character 62 and 63;
+ * - To pad or not to pad.
+ */
+
+#include <inttypes.h>
+#include <base64.h>
+
+size_t genbase64(char *output, const void *input, size_t size, int flags)
+{
+    static char charz[] =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_";
+    uint8_t buf[3];
+    int j;
+    const uint8_t *p;
+    char *q;
+    uint32_t bv;
+    int left = size;
+
+    charz[62] = (char)flags;
+    charz[63] = (char)(flags >> 8);
+
+    p = input;
+    q = output;
+
+    while (left > 0) {
+	if (left < 3) {
+	    buf[0] = p[0];
+	    buf[1] = (left > 1) ? p[1] : 0;
+	    buf[2] = 0;
+	    p = buf;
+	}
+
+	bv = (p[0] << 16) | (p[1] << 8) | p[2];
+	p += 3;
+	left -= 3;
+
+	for (j = 0; j < 4; j++) {
+	    *q++ = charz[(bv >> 18) & 0x3f];
+	    bv <<= 6;
+	}
+    }
+
+    switch (left) {
+    case -1:
+	if (flags & BASE64_PAD)
+	    q[-1] = '=';
+	else
+	    q--;
+	break;
+
+    case -2:
+	if (flags & BASE64_PAD)
+	    q[-2] = q[-1] = '=';
+	else
+	    q -= 2;
+	break;
+
+    default:
+	break;
+    }
+
+    *q = '\0';
+
+    return q - output;
+}
+
+#ifdef TEST
+
+#include <stdio.h>
+#include <string.h>
+
+int main(int argc, char *argv[])
+{
+    int i;
+    char buf[4096];
+    int len, bytes;
+
+    for (i = 1; i < argc; i++) {
+	printf("Original: \"%s\"\n", argv[i]);
+
+	len = strlen(argv[i]);
+	bytes = genbase64(buf, argv[i], len, BASE64_MIME | BASE64_PAD);
+	printf("    MIME: \"%s\" (%d)\n", buf, bytes);
+	bytes = genbase64(buf, argv[i], len, BASE64_SAFE);
+	printf("    Safe: \"%s\" (%d)\n", buf, bytes);
+    }
+
+    return 0;
+}
+
+#endif