--- /dev/null
+/*************************************************
+* Perl-Compatible Regular Expressions *
+*************************************************/
+
+/* PCRE is a library of functions to support regular expressions whose syntax
+and semantics are as close as possible to those of the Perl 5 language.
+
+ Written by Philip Hazel
+ Original API code Copyright (c) 1997-2012 University of Cambridge
+ New API code Copyright (c) 2016-2018 University of Cambridge
+
+-----------------------------------------------------------------------------
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ * 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.
+
+ * Neither the name of the University of Cambridge nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
+-----------------------------------------------------------------------------
+*/
+
+/* This module contains functions for serializing and deserializing
+a sequence of compiled codes. */
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+
+#include "pcre2_internal.h"
+
+/* Magic number to provide a small check against being handed junk. */
+
+#define SERIALIZED_DATA_MAGIC 0x50523253u
+
+/* Deserialization is limited to the current PCRE version and
+character width. */
+
+#define SERIALIZED_DATA_VERSION \
+ ((PCRE2_MAJOR) | ((PCRE2_MINOR) << 16))
+
+#define SERIALIZED_DATA_CONFIG \
+ (sizeof(PCRE2_UCHAR) | ((sizeof(void*)) << 8) | ((sizeof(PCRE2_SIZE)) << 16))
+
+
+
+/*************************************************
+* Serialize compiled patterns *
+*************************************************/
+
+PCRE2_EXP_DEFN int32_t PCRE2_CALL_CONVENTION
+pcre2_serialize_encode(const pcre2_code **codes, int32_t number_of_codes,
+ uint8_t **serialized_bytes, PCRE2_SIZE *serialized_size,
+ pcre2_general_context *gcontext)
+{
+uint8_t *bytes;
+uint8_t *dst_bytes;
+int32_t i;
+PCRE2_SIZE total_size;
+const pcre2_real_code *re;
+const uint8_t *tables;
+pcre2_serialized_data *data;
+
+const pcre2_memctl *memctl = (gcontext != NULL) ?
+ &gcontext->memctl : &PRIV(default_compile_context).memctl;
+
+if (codes == NULL || serialized_bytes == NULL || serialized_size == NULL)
+ return PCRE2_ERROR_NULL;
+
+if (number_of_codes <= 0) return PCRE2_ERROR_BADDATA;
+
+/* Compute total size. */
+total_size = sizeof(pcre2_serialized_data) + tables_length;
+tables = NULL;
+
+for (i = 0; i < number_of_codes; i++)
+ {
+ if (codes[i] == NULL) return PCRE2_ERROR_NULL;
+ re = (const pcre2_real_code *)(codes[i]);
+ if (re->magic_number != MAGIC_NUMBER) return PCRE2_ERROR_BADMAGIC;
+ if (tables == NULL)
+ tables = re->tables;
+ else if (tables != re->tables)
+ return PCRE2_ERROR_MIXEDTABLES;
+ total_size += re->blocksize;
+ }
+
+/* Initialize the byte stream. */
+bytes = memctl->malloc(total_size + sizeof(pcre2_memctl), memctl->memory_data);
+if (bytes == NULL) return PCRE2_ERROR_NOMEMORY;
+
+/* The controller is stored as a hidden parameter. */
+memcpy(bytes, memctl, sizeof(pcre2_memctl));
+bytes += sizeof(pcre2_memctl);
+
+data = (pcre2_serialized_data *)bytes;
+data->magic = SERIALIZED_DATA_MAGIC;
+data->version = SERIALIZED_DATA_VERSION;
+data->config = SERIALIZED_DATA_CONFIG;
+data->number_of_codes = number_of_codes;
+
+/* Copy all compiled code data. */
+dst_bytes = bytes + sizeof(pcre2_serialized_data);
+memcpy(dst_bytes, tables, tables_length);
+dst_bytes += tables_length;
+
+for (i = 0; i < number_of_codes; i++)
+ {
+ re = (const pcre2_real_code *)(codes[i]);
+ (void)memcpy(dst_bytes, (char *)re, re->blocksize);
+
+ /* Certain fields in the compiled code block are re-set during
+ deserialization. In order to ensure that the serialized data stream is always
+ the same for the same pattern, set them to zero here. We can't assume the
+ copy of the pattern is correctly aligned for accessing the fields as part of
+ a structure. Note the use of sizeof(void *) in the second of these, to
+ specify the size of a pointer. If sizeof(uint8_t *) is used (tables is a
+ pointer to uint8_t), gcc gives a warning because the first argument is also a
+ pointer to uint8_t. Casting the first argument to (void *) can stop this, but
+ it didn't stop Coverity giving the same complaint. */
+
+ (void)memset(dst_bytes + offsetof(pcre2_real_code, memctl), 0,
+ sizeof(pcre2_memctl));
+ (void)memset(dst_bytes + offsetof(pcre2_real_code, tables), 0,
+ sizeof(void *));
+ (void)memset(dst_bytes + offsetof(pcre2_real_code, executable_jit), 0,
+ sizeof(void *));
+
+ dst_bytes += re->blocksize;
+ }
+
+*serialized_bytes = bytes;
+*serialized_size = total_size;
+return number_of_codes;
+}
+
+
+/*************************************************
+* Deserialize compiled patterns *
+*************************************************/
+
+PCRE2_EXP_DEFN int32_t PCRE2_CALL_CONVENTION
+pcre2_serialize_decode(pcre2_code **codes, int32_t number_of_codes,
+ const uint8_t *bytes, pcre2_general_context *gcontext)
+{
+const pcre2_serialized_data *data = (const pcre2_serialized_data *)bytes;
+const pcre2_memctl *memctl = (gcontext != NULL) ?
+ &gcontext->memctl : &PRIV(default_compile_context).memctl;
+
+const uint8_t *src_bytes;
+pcre2_real_code *dst_re;
+uint8_t *tables;
+int32_t i, j;
+
+/* Sanity checks. */
+
+if (data == NULL || codes == NULL) return PCRE2_ERROR_NULL;
+if (number_of_codes <= 0) return PCRE2_ERROR_BADDATA;
+if (data->number_of_codes <= 0) return PCRE2_ERROR_BADSERIALIZEDDATA;
+if (data->magic != SERIALIZED_DATA_MAGIC) return PCRE2_ERROR_BADMAGIC;
+if (data->version != SERIALIZED_DATA_VERSION) return PCRE2_ERROR_BADMODE;
+if (data->config != SERIALIZED_DATA_CONFIG) return PCRE2_ERROR_BADMODE;
+
+if (number_of_codes > data->number_of_codes)
+ number_of_codes = data->number_of_codes;
+
+src_bytes = bytes + sizeof(pcre2_serialized_data);
+
+/* Decode tables. The reference count for the tables is stored immediately
+following them. */
+
+tables = memctl->malloc(tables_length + sizeof(PCRE2_SIZE), memctl->memory_data);
+if (tables == NULL) return PCRE2_ERROR_NOMEMORY;
+
+memcpy(tables, src_bytes, tables_length);
+*(PCRE2_SIZE *)(tables + tables_length) = number_of_codes;
+src_bytes += tables_length;
+
+/* Decode the byte stream. We must not try to read the size from the compiled
+code block in the stream, because it might be unaligned, which causes errors on
+hardware such as Sparc-64 that doesn't like unaligned memory accesses. The type
+of the blocksize field is given its own name to ensure that it is the same here
+as in the block. */
+
+for (i = 0; i < number_of_codes; i++)
+ {
+ CODE_BLOCKSIZE_TYPE blocksize;
+ memcpy(&blocksize, src_bytes + offsetof(pcre2_real_code, blocksize),
+ sizeof(CODE_BLOCKSIZE_TYPE));
+ if (blocksize <= sizeof(pcre2_real_code))
+ return PCRE2_ERROR_BADSERIALIZEDDATA;
+
+ /* The allocator provided by gcontext replaces the original one. */
+
+ dst_re = (pcre2_real_code *)PRIV(memctl_malloc)(blocksize,
+ (pcre2_memctl *)gcontext);
+ if (dst_re == NULL)
+ {
+ memctl->free(tables, memctl->memory_data);
+ for (j = 0; j < i; j++)
+ {
+ memctl->free(codes[j], memctl->memory_data);
+ codes[j] = NULL;
+ }
+ return PCRE2_ERROR_NOMEMORY;
+ }
+
+ /* The new allocator must be preserved. */
+
+ memcpy(((uint8_t *)dst_re) + sizeof(pcre2_memctl),
+ src_bytes + sizeof(pcre2_memctl), blocksize - sizeof(pcre2_memctl));
+ if (dst_re->magic_number != MAGIC_NUMBER ||
+ dst_re->name_entry_size > MAX_NAME_SIZE + IMM2_SIZE + 1 ||
+ dst_re->name_count > MAX_NAME_COUNT)
+ {
+ memctl->free(dst_re, memctl->memory_data);
+ return PCRE2_ERROR_BADSERIALIZEDDATA;
+ }
+
+ /* At the moment only one table is supported. */
+
+ dst_re->tables = tables;
+ dst_re->executable_jit = NULL;
+ dst_re->flags |= PCRE2_DEREF_TABLES;
+
+ codes[i] = dst_re;
+ src_bytes += blocksize;
+ }
+
+return number_of_codes;
+}
+
+
+/*************************************************
+* Get the number of serialized patterns *
+*************************************************/
+
+PCRE2_EXP_DEFN int32_t PCRE2_CALL_CONVENTION
+pcre2_serialize_get_number_of_codes(const uint8_t *bytes)
+{
+const pcre2_serialized_data *data = (const pcre2_serialized_data *)bytes;
+
+if (data == NULL) return PCRE2_ERROR_NULL;
+if (data->magic != SERIALIZED_DATA_MAGIC) return PCRE2_ERROR_BADMAGIC;
+if (data->version != SERIALIZED_DATA_VERSION) return PCRE2_ERROR_BADMODE;
+if (data->config != SERIALIZED_DATA_CONFIG) return PCRE2_ERROR_BADMODE;
+
+return data->number_of_codes;
+}
+
+
+/*************************************************
+* Free the allocated stream *
+*************************************************/
+
+PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
+pcre2_serialize_free(uint8_t *bytes)
+{
+if (bytes != NULL)
+ {
+ pcre2_memctl *memctl = (pcre2_memctl *)(bytes - sizeof(pcre2_memctl));
+ memctl->free(memctl, memctl->memory_data);
+ }
+}
+
+/* End of pcre2_serialize.c */
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