configure.ac: remove sanitizer by default

[pam_pcsc_cr.git] / serial.c

diff --git a/serial.c b/serial.c
index 8a24abd3db1d11f19bdce85a905420936e4a155f..8bb781d6d12a56b548dc3557c41a64669b019928 100644 (file)
--- a/serial.c
+++ b/serial.c
@@ -1,30 +1,52 @@
+/*
+Copyright (c) 2013 Eugene Crosser
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must
+    not claim that you wrote the original software. If you use this
+    software in a product, an acknowledgment in the product documentation
+    would be appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must
+    not be misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution.
+*/
+
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
 #include <string.h>
 #include "serial.h"
 
-int serial_init(serializer_t *srl, void *buffer, int size)
+void serial_init(serializer_t *srl, void *buffer, size_t size)
 {
        srl->buffer = srl->cursor = buffer;
        srl->bufsize = size;
-       return 0;
 }
 
-int serial_switch(serializer_t *srl, void *buffer, int size)
+void serial_switch(serializer_t *srl, void *buffer, size_t size)
 {
-       int used = srl->cursor - srl->buffer;
+       size_t used = srl->cursor - srl->buffer;
 
        memcpy(buffer, srl->buffer, used);
        srl->buffer = buffer;
        srl->bufsize = size;
        srl->cursor = buffer + used;
-       return 0;
 }
 
-int serial_put(serializer_t *srl, const void *item, int size)
+/* returns 'size' on success, or remainging space if it was insufficient */
+size_t serial_put(serializer_t *srl, const void *item, size_t size)
 {
-       int left = srl->bufsize - (srl->cursor - srl->buffer);
+       size_t left = srl->bufsize - (srl->cursor - srl->buffer);
 
        if (left < size + sizeof(short)) return left - sizeof(short);
        *((short *)srl->cursor) = size;
@@ -34,20 +56,21 @@ int serial_put(serializer_t *srl, const void *item, int size)
        return size;
 }
 
-int serial_get(serializer_t *srl, void *item, int bufsize)
+/* return 0 on success, -1 on wrong encoding (item longer than space left) */
+int serial_get(serializer_t *srl, void **item, size_t *size)
 {
-       int left = srl->bufsize - (srl->cursor - srl->buffer);
+       size_t left = srl->bufsize - (srl->cursor - srl->buffer);
        short isize = *((short *)srl->cursor);
 
-       if (isize > bufsize) return isize;
        if (isize + sizeof(short) > left) return -1;
        srl->cursor += sizeof(short);
-       if (isize) memcpy(item, srl->cursor, isize);
+       *item = srl->cursor;
+       *size = isize;
        srl->cursor += isize;
-       return isize;
+       return 0;
 }
 
-int serial_size(serializer_t *srl)
+size_t serial_size(serializer_t *srl)
 {
        return srl->cursor - srl->buffer;
 }