1 files changed, 321 insertions, 0 deletions
diff --git a/src/Common/libzip/zip_buffer.c b/src/Common/libzip/zip_buffer.c
new file mode 100644
index 00000000..43864f9b
--- /dev/null
+++ b/src/Common/libzip/zip_buffer.c
@@ -0,0 +1,321 @@
+/*
+ zip_buffer.c -- bounds checked access to memory buffer
+ Copyright (C) 2014 Dieter Baron and Thomas Klausner
+ 
+ This file is part of libzip, a library to manipulate ZIP archives.
+ The authors can be contacted at <libzip@nih.at>
+ 
+ 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, 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.
+ 3. The names of the authors may not be used to endorse or promote
+ products derived from this software without specific prior
+ written permission.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "zipint.h"
+
+zip_uint8_t *
+_zip_buffer_data(zip_buffer_t *buffer)
+{
+    return buffer->data;
+}
+
+
+void
+_zip_buffer_free(zip_buffer_t *buffer)
+{
+    if (buffer == NULL) {
+        return;
+    }
+    
+    if (buffer->free_data) {
+        free(buffer->data);
+    }
+    
+    free(buffer);
+}
+
+
+bool
+_zip_buffer_eof(zip_buffer_t *buffer)
+{
+    return buffer->ok && buffer->offset == buffer->size;
+}
+
+
+zip_uint8_t *
+_zip_buffer_get(zip_buffer_t *buffer, zip_uint64_t length)
+{
+    zip_uint8_t *data;
+    
+    if (!buffer->ok || buffer->offset + length < length || buffer->offset + length > buffer->size) {
+        buffer->ok = false;
+        return NULL;
+    }
+    
+    data = buffer->data + buffer->offset;
+    buffer->offset += length;
+    return data;
+}
+
+
+zip_uint16_t
+_zip_buffer_get_16(zip_buffer_t *buffer)
+{
+    zip_uint8_t *data = _zip_buffer_get(buffer, 2);
+    
+    if (data == NULL) {
+        return 0;
+    }
+    
+    return (zip_uint16_t)(data[0] + (data[1] << 8));
+}
+
+
+zip_uint32_t
+_zip_buffer_get_32(zip_buffer_t *buffer)
+{
+    zip_uint8_t *data = _zip_buffer_get(buffer, 4);
+    
+    if (data == NULL) {
+        return 0;
+    }
+    
+    return ((((((zip_uint32_t)data[3] << 8) + data[2]) << 8) + data[1]) << 8) + data[0];
+}
+
+
+zip_uint64_t
+_zip_buffer_get_64(zip_buffer_t *buffer)
+{
+    zip_uint8_t *data = _zip_buffer_get(buffer, 8);
+    
+    if (data == NULL) {
+        return 0;
+    }
+
+    return ((zip_uint64_t)data[7] << 56) + ((zip_uint64_t)data[6] << 48) + ((zip_uint64_t)data[5] << 40) + ((zip_uint64_t)data[4] << 32) + ((zip_uint64_t)data[3] << 24) + ((zip_uint64_t)data[2] << 16) + ((zip_uint64_t)data[1] << 8) + (zip_uint64_t)data[0];
+}
+
+
+
+zip_uint8_t
+_zip_buffer_get_8(zip_buffer_t *buffer)
+{
+    zip_uint8_t *data = _zip_buffer_get(buffer, 1);
+    
+    if (data == NULL) {
+        return 0;
+    }
+    
+    return data[0];
+}
+
+
+zip_uint64_t
+_zip_buffer_left(zip_buffer_t *buffer)
+{
+    return buffer->ok ? buffer->size - buffer->offset : 0;
+}
+
+
+zip_buffer_t *
+_zip_buffer_new(zip_uint8_t *data, zip_uint64_t size)
+{
+    bool free_data = (data == NULL);
+    zip_buffer_t *buffer;
+    
+    if (data == NULL) {
+        if ((data = (zip_uint8_t *)malloc(size)) == NULL) {
+            return NULL;
+        }
+    }
+
+    if ((buffer = (zip_buffer_t *)malloc(sizeof(*buffer))) == NULL) {
+        if (free_data) {
+            free(data);
+        }
+        return NULL;
+    }
+    
+    buffer->ok = true;
+    buffer->data = data;
+    buffer->size = size;
+    buffer->offset = 0;
+    buffer->free_data = free_data;
+    
+    return buffer;
+}
+
+
+zip_buffer_t *
+_zip_buffer_new_from_source(zip_source_t *src, zip_uint64_t size, zip_uint8_t *buf, zip_error_t *error)
+{
+    zip_buffer_t *buffer;
+    
+    if ((buffer = _zip_buffer_new(buf, size)) == NULL) {
+        zip_error_set(error, ZIP_ER_MEMORY, 0);
+        return NULL;
+    }
+    
+    if (_zip_read(src, buffer->data, size, error) < 0) {
+        _zip_buffer_free(buffer);
+        return NULL;
+    }
+    
+    return buffer;
+}
+
+
+zip_uint64_t
+_zip_buffer_offset(zip_buffer_t *buffer)
+{
+    return buffer->ok ? buffer->offset : 0;
+}
+
+
+bool
+_zip_buffer_ok(zip_buffer_t *buffer)
+{
+    return buffer->ok;
+}
+
+
+int
+_zip_buffer_put(zip_buffer_t *buffer, const void *src, size_t length)
+{
+    zip_uint8_t *dst = _zip_buffer_get(buffer, length);
+    
+    if (dst == NULL) {
+        return -1;
+    }
+    
+    memcpy(dst, src, length);
+    return 0;
+}
+
+
+int
+_zip_buffer_put_16(zip_buffer_t *buffer, zip_uint16_t i)
+{
+    zip_uint8_t *data = _zip_buffer_get(buffer, 2);
+    
+    if (data == NULL) {
+        return -1;
+    }
+
+    data[0] = (zip_uint8_t)(i & 0xff);
+    data[1] = (zip_uint8_t)((i >> 8) & 0xff);
+    
+    return 0;
+}
+
+
+int
+_zip_buffer_put_32(zip_buffer_t *buffer, zip_uint32_t i)
+{
+    zip_uint8_t *data = _zip_buffer_get(buffer, 4);
+    
+    if (data == NULL) {
+        return -1;
+    }
+    
+    data[0] = (zip_uint8_t)(i & 0xff);
+    data[1] = (zip_uint8_t)((i >> 8) & 0xff);
+    data[2] = (zip_uint8_t)((i >> 16) & 0xff);
+    data[3] = (zip_uint8_t)((i >> 24) & 0xff);
+    
+    return 0;
+}
+
+
+int
+_zip_buffer_put_64(zip_buffer_t *buffer, zip_uint64_t i)
+{
+    zip_uint8_t *data = _zip_buffer_get(buffer, 8);
+    
+    if (data == NULL) {
+        return -1;
+    }
+    
+    data[0] = (zip_uint8_t)(i & 0xff);
+    data[1] = (zip_uint8_t)((i >> 8) & 0xff);
+    data[2] = (zip_uint8_t)((i >> 16) & 0xff);
+    data[3] = (zip_uint8_t)((i >> 24) & 0xff);
+    data[4] = (zip_uint8_t)((i >> 32) & 0xff);
+    data[5] = (zip_uint8_t)((i >> 40) & 0xff);
+    data[6] = (zip_uint8_t)((i >> 48) & 0xff);
+    data[7] = (zip_uint8_t)((i >> 56) & 0xff);
+    
+    return 0;
+}
+
+
+int
+_zip_buffer_put_8(zip_buffer_t *buffer, zip_uint8_t i)
+{
+    zip_uint8_t *data = _zip_buffer_get(buffer, 1);
+    
+    if (data == NULL) {
+        return -1;
+    }
+    
+    data[0] = i;
+    
+    return 0;
+}
+
+
+int
+_zip_buffer_set_offset(zip_buffer_t *buffer, zip_uint64_t offset)
+{
+    if (offset > buffer->size) {
+        buffer->ok = false;
+        return -1;
+    }
+    
+    buffer->ok = true;
+    buffer->offset = offset;
+    
+    return 0;
+}
+
+
+int
+_zip_buffer_skip(zip_buffer_t *buffer, zip_uint64_t length) {
+    zip_uint64_t offset = buffer->offset + length;
+    
+    if (offset < buffer->offset) {
+        buffer->ok = false;
+        return -1;
+    }
+    return _zip_buffer_set_offset(buffer, offset);
+}
+
+zip_uint64_t
+_zip_buffer_size(zip_buffer_t *buffer)
+{
+    return buffer->size;
+}