Merge branch 'master' into squeeze

[debian/amanda] / ndmp-src / ndml_cstr.c

diff --git a/ndmp-src/ndml_cstr.c b/ndmp-src/ndml_cstr.c
new file mode 100644 (file)
index 0000000..1b784b7
--- /dev/null
+++ b/ndmp-src/ndml_cstr.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2000
+ *     Traakan, Inc., Los Altos, CA
+ *     All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Project:  NDMJOB
+ * Ident:    $Id: $
+ *
+ * Description:
+ *     Convert strings to/from a canonical strings (CSTR).
+ *
+ *     The main reason for this is to eliminate spaces
+ *     in strings thus making multiple strings easily
+ *     delimited by white space.
+ *
+ *     Canonical strings use the HTTP convention of
+ *     percent sign followed by two hex digits (%xx).
+ *     Characters outside the printable ASCII range,
+ *     space, and percent sign are so converted.
+ *
+ *     Both interfaces return the length of the resulting
+ *     string, -1 if there is an overflow, or -2
+ *     there is a conversion error.
+ */
+
+
+#include "ndmlib.h"
+
+
+static char    ndmcstr_to_hex[] = "0123456789ABCDEF";
+
+extern int     ndmcstr_from_hex (int c);
+
+int
+ndmcstr_from_str (char *src, char *dst, unsigned dst_max)
+{
+       unsigned char *         p = (unsigned char *)src;
+       unsigned char *         q = (unsigned char *)dst;
+       unsigned char *         q_end = q + dst_max - 1;
+       int                     c;
+
+       while ((c = *p++) != 0) {
+               if (c <= ' ' || c > 0x7E || c == NDMCSTR_WARN) {
+                       if (q+3 > q_end)
+                               return -1;
+                       *q++ = NDMCSTR_WARN;
+                       *q++ = ndmcstr_to_hex[(c>>4)&0xF];
+                       *q++ = ndmcstr_to_hex[c&0xF];
+               } else {
+                       if (q+1 > q_end)
+                               return -1;
+                       *q++ = c;
+               }
+       }
+       *q = 0;
+
+       return q - (unsigned char *)dst;
+}
+
+int
+ndmcstr_to_str (char *src, char *dst, unsigned dst_max)
+{
+       unsigned char *         p = (unsigned char *)src;
+       unsigned char *         q = (unsigned char *)dst;
+       unsigned char *         q_end = q + dst_max - 1;
+       int                     c, c1, c2;
+
+       while ((c = *p++) != 0) {
+               if (q+1 > q_end)
+                       return -1;
+               if (c != NDMCSTR_WARN) {
+                       *q++ = c;
+                       continue;
+               }
+               c1 = ndmcstr_from_hex (p[0]);
+               c2 = ndmcstr_from_hex (p[1]);
+
+               if (c1 < 0 || c2 < 0) {
+                       /* busted conversion */
+                       return -2;
+               }
+
+               c = (c1<<4) + c2;
+               *q++ = c;
+               p += 2;
+       }
+       *q = 0;
+
+       return q - (unsigned char *)dst;
+}
+
+int
+ndmcstr_from_hex (int c)
+{
+       if ('0' <= c && c <= '9')
+               return c - '0';
+       if ('a' <= c && c <= 'f')
+               return (c - 'a') + 10;
+       if ('A' <= c && c <= 'F')
+               return (c - 'A') + 10;
+       return -1;
+}