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CMake/Utilities/cmxmlrpc/xmlrpc_struct.c

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/* Copyright (C) 2001 by First Peer, Inc. 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, 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 name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** 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. */
#include "xmlrpc_config.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "xmlrpc.h"
#include "xmlrpc_int.h"
#define KEY_ERROR_BUFFER_SZ (32)
void
xmlrpc_destroyStruct(xmlrpc_value * const structP) {
_struct_member * const members =
XMLRPC_MEMBLOCK_CONTENTS(_struct_member, &structP->_block);
size_t const size =
XMLRPC_MEMBLOCK_SIZE(_struct_member, &structP->_block);
unsigned int i;
for (i = 0; i < size; ++i) {
xmlrpc_DECREF(members[i].key);
xmlrpc_DECREF(members[i].value);
}
XMLRPC_MEMBLOCK_CLEAN(_struct_member, &structP->_block);
}
/*=========================================================================
** xmlrpc_struct_new
**=========================================================================
** Create a new <struct> value. The corresponding destructor code
** currently lives in xmlrpc_DECREF.
**
** We store the individual members in an array of _struct_member. This
** contains a key, a hash code, and a value. We look up keys by doing
** a linear search of the hash codes.
*/
xmlrpc_value *
xmlrpc_struct_new(xmlrpc_env* env)
{
xmlrpc_value *strct;
int strct_valid;
XMLRPC_ASSERT_ENV_OK(env);
/* Set up error handling preconditions. */
strct_valid = 0;
/* Allocate and fill out an empty structure. */
strct = (xmlrpc_value*) malloc(sizeof(xmlrpc_value));
XMLRPC_FAIL_IF_NULL(strct, env, XMLRPC_INTERNAL_ERROR,
"Could not allocate memory for struct");
strct->_refcount = 1;
strct->_type = XMLRPC_TYPE_STRUCT;
XMLRPC_MEMBLOCK_INIT(_struct_member, env, &strct->_block, 0);
XMLRPC_FAIL_IF_FAULT(env);
strct_valid = 1;
cleanup:
if (env->fault_occurred) {
if (strct) {
if (strct_valid)
xmlrpc_DECREF(strct);
else
free(strct);
}
return NULL;
}
return strct;
}
/*=========================================================================
** xmlrpc_struct_size
**=========================================================================
** Return the number of key-value pairs contained in the struct. If the
** value is not a struct, return -1 and set a fault.
*/
int
xmlrpc_struct_size(xmlrpc_env* env, xmlrpc_value* strct)
{
int retval;
/* Suppress a compiler warning about uninitialized variables. */
retval = 0;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT_VALUE_OK(strct);
XMLRPC_TYPE_CHECK(env, strct, XMLRPC_TYPE_STRUCT);
retval = (int)XMLRPC_MEMBLOCK_SIZE(_struct_member, &strct->_block);
cleanup:
if (env->fault_occurred)
return -1;
return retval;
}
/*=========================================================================
** get_hash
**=========================================================================
** A mindlessly simple hash function. Please feel free to write something
** more clever if this produces bad results.
*/
static unsigned char
get_hash(const char * const key,
size_t const key_len) {
unsigned char retval;
size_t i;
XMLRPC_ASSERT(key != NULL);
retval = 0;
for (i = 0; i < key_len; i++)
retval += key[i];
return retval;
}
/*=========================================================================
** find_member
**=========================================================================
** Get the index of the member with the specified key, or -1 if no such
** member exists.
*/
static int
find_member(xmlrpc_value * const strctP,
const char * const key,
size_t const key_len) {
size_t size, i;
unsigned char hash;
_struct_member *contents;
xmlrpc_value *keyval;
char *keystr;
size_t keystr_size;
XMLRPC_ASSERT_VALUE_OK(strctP);
XMLRPC_ASSERT(key != NULL);
/* Look for our key. */
hash = get_hash(key, key_len);
size = XMLRPC_MEMBLOCK_SIZE(_struct_member, &strctP->_block);
contents = XMLRPC_MEMBLOCK_CONTENTS(_struct_member, &strctP->_block);
for (i = 0; i < size; i++) {
if (contents[i].key_hash == hash) {
keyval = contents[i].key;
keystr = XMLRPC_MEMBLOCK_CONTENTS(char, &keyval->_block);
keystr_size = XMLRPC_MEMBLOCK_SIZE(char, &keyval->_block)-1;
if (key_len == keystr_size && memcmp(key, keystr, key_len) == 0)
return (int)i;
}
}
return -1;
}
/*=========================================================================
** xmlrpc_struct_has_key
**=========================================================================
*/
int
xmlrpc_struct_has_key(xmlrpc_env * const envP,
xmlrpc_value * const strctP,
const char * const key) {
XMLRPC_ASSERT(key != NULL);
return xmlrpc_struct_has_key_n(envP, strctP, key, strlen(key));
}
int
xmlrpc_struct_has_key_n(xmlrpc_env * const envP,
xmlrpc_value * const strctP,
const char * const key,
size_t const key_len) {
int xmIndex;
/* Suppress a compiler warning about uninitialized variables. */
xmIndex = 0;
XMLRPC_ASSERT_ENV_OK(envP);
XMLRPC_ASSERT_VALUE_OK(strctP);
XMLRPC_ASSERT(key != NULL);
XMLRPC_TYPE_CHECK(envP, strctP, XMLRPC_TYPE_STRUCT);
xmIndex = find_member(strctP, key, key_len);
cleanup:
if (envP->fault_occurred)
return 0;
return (xmIndex >= 0);
}
/*=========================================================================
** xmlrpc_struct_find_value...
**=========================================================================
** These functions look up a specified key value in a specified struct.
** If it exists, they return the value of the struct member. If not,
** they return a NULL to indicate such.
*/
/* It would be a nice extension to be able to look up a key that is
not a text string.
*/
void
xmlrpc_struct_find_value(xmlrpc_env * const envP,
xmlrpc_value * const structP,
const char * const key,
xmlrpc_value ** const valuePP) {
/*----------------------------------------------------------------------------
Given a key, retrieve a value from the struct. If the key is not
present, return NULL as *valuePP.
-----------------------------------------------------------------------------*/
XMLRPC_ASSERT_ENV_OK(envP);
XMLRPC_ASSERT_VALUE_OK(structP);
XMLRPC_ASSERT_PTR_OK(key);
if (structP->_type != XMLRPC_TYPE_STRUCT)
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_TYPE_ERROR, "Value is not a struct. It is type #%d",
structP->_type);
else {
int xmIndex;
/* Get our member index. */
xmIndex = find_member(structP, key, strlen(key));
if (xmIndex < 0)
*valuePP = NULL;
else {
_struct_member * const members =
XMLRPC_MEMBLOCK_CONTENTS(_struct_member, &structP->_block);
*valuePP = members[xmIndex].value;
XMLRPC_ASSERT_VALUE_OK(*valuePP);
xmlrpc_INCREF(*valuePP);
}
}
}
void
xmlrpc_struct_find_value_v(xmlrpc_env * const envP,
xmlrpc_value * const structP,
xmlrpc_value * const keyP,
xmlrpc_value ** const valuePP) {
/*----------------------------------------------------------------------------
Given a key, retrieve a value from the struct. If the key is not
present, return NULL as *valuePP.
-----------------------------------------------------------------------------*/
XMLRPC_ASSERT_ENV_OK(envP);
XMLRPC_ASSERT_VALUE_OK(structP);
XMLRPC_ASSERT_VALUE_OK(keyP);
if (structP->_type != XMLRPC_TYPE_STRUCT)
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_TYPE_ERROR, "Value is not a struct. It is type #%d",
structP->_type);
else {
if (keyP->_type != XMLRPC_TYPE_STRING)
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_TYPE_ERROR, "Key value is not a string. "
"It is type #%d",
keyP->_type);
else {
int xmIndex;
/* Get our member index. */
xmIndex = find_member(structP,
XMLRPC_MEMBLOCK_CONTENTS(char, &keyP->_block),
XMLRPC_MEMBLOCK_SIZE(char, &keyP->_block)-1);
if (xmIndex < 0)
*valuePP = NULL;
else {
_struct_member * const members =
XMLRPC_MEMBLOCK_CONTENTS(_struct_member, &structP->_block);
*valuePP = members[xmIndex].value;
XMLRPC_ASSERT_VALUE_OK(*valuePP);
xmlrpc_INCREF(*valuePP);
}
}
}
}
/*=========================================================================
** xmlrpc_struct_read_value...
**=========================================================================
** These fail if no member with the specified key exists.
** Otherwise, they are the same as xmlrpc_struct_find_value...
*/
void
xmlrpc_struct_read_value_v(xmlrpc_env * const envP,
xmlrpc_value * const structP,
xmlrpc_value * const keyP,
xmlrpc_value ** const valuePP) {
xmlrpc_struct_find_value_v(envP, structP, keyP, valuePP);
if (!envP->fault_occurred) {
if (*valuePP == NULL) {
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_INDEX_ERROR, "No member of struct has key '%.*s'",
XMLRPC_MEMBLOCK_SIZE(char, &keyP->_block),
XMLRPC_MEMBLOCK_CONTENTS(char, &keyP->_block));
}
}
}
void
xmlrpc_struct_read_value(xmlrpc_env * const envP,
xmlrpc_value * const structP,
const char * const key,
xmlrpc_value ** const valuePP) {
xmlrpc_struct_find_value(envP, structP, key, valuePP);
if (!envP->fault_occurred) {
if (*valuePP == NULL) {
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_INDEX_ERROR, "No member of struct has key '%s'",
key);
/* We should fix the error message to format the key for display */
}
}
}
/*=========================================================================
** xmlrpc_struct_get_value...
**=========================================================================
** These are for backward compatibility. They used to be the only ones.
** They're deprecated because they don't acquire a reference to the
** value they return.
*/
xmlrpc_value *
xmlrpc_struct_get_value_n(xmlrpc_env * const envP,
xmlrpc_value * const structP,
const char * const key,
size_t const keyLen) {
xmlrpc_value * retval;
xmlrpc_value * keyP;
keyP = xmlrpc_build_value(envP, "s#", key, keyLen);
if (!envP->fault_occurred) {
xmlrpc_struct_find_value_v(envP, structP, keyP, &retval);
if (!envP->fault_occurred) {
if (retval == NULL) {
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_INDEX_ERROR,
"No member of struct has key '%.*s'",
keyLen, key);
/* We should fix the error message to format the key
for display */
} else
/* For backward compatibility. */
xmlrpc_DECREF(retval);
}
xmlrpc_DECREF(keyP);
}
return retval;
}
xmlrpc_value *
xmlrpc_struct_get_value(xmlrpc_env * const envP,
xmlrpc_value * const strctP,
const char * const key) {
XMLRPC_ASSERT(key != NULL);
return xmlrpc_struct_get_value_n(envP, strctP, key, strlen(key));
}
/*=========================================================================
** xmlrpc_struct_set_value
**=========================================================================
*/
void
xmlrpc_struct_set_value(xmlrpc_env * const envP,
xmlrpc_value * const strctP,
const char * const key,
xmlrpc_value * const valueP) {
XMLRPC_ASSERT(key != NULL);
xmlrpc_struct_set_value_n(envP, strctP, key, strlen(key), valueP);
}
void
xmlrpc_struct_set_value_n(xmlrpc_env * const envP,
xmlrpc_value * const strctP,
const char * const key,
size_t const key_len,
xmlrpc_value * const valueP) {
xmlrpc_value *keyval;
XMLRPC_ASSERT_ENV_OK(envP);
XMLRPC_ASSERT(key != NULL);
/* Set up error handling preconditions. */
keyval = NULL;
XMLRPC_TYPE_CHECK(envP, strctP, XMLRPC_TYPE_STRUCT);
/* Build an xmlrpc_value from our string. */
keyval = xmlrpc_build_value(envP, "s#", key, key_len);
XMLRPC_FAIL_IF_FAULT(envP);
/* Do the actual work. */
xmlrpc_struct_set_value_v(envP, strctP, keyval, valueP);
cleanup:
if (keyval)
xmlrpc_DECREF(keyval);
}
void
xmlrpc_struct_set_value_v(xmlrpc_env * const envP,
xmlrpc_value * const strctP,
xmlrpc_value * const keyvalP,
xmlrpc_value * const valueP) {
char *key;
size_t key_len;
int xmIndex;
_struct_member *members, *member, new_member;
xmlrpc_value *old_value;
XMLRPC_ASSERT_ENV_OK(envP);
XMLRPC_ASSERT_VALUE_OK(strctP);
XMLRPC_ASSERT_VALUE_OK(keyvalP);
XMLRPC_ASSERT_VALUE_OK(valueP);
XMLRPC_TYPE_CHECK(envP, strctP, XMLRPC_TYPE_STRUCT);
XMLRPC_TYPE_CHECK(envP, keyvalP, XMLRPC_TYPE_STRING);
key = XMLRPC_MEMBLOCK_CONTENTS(char, &keyvalP->_block);
key_len = XMLRPC_MEMBLOCK_SIZE(char, &keyvalP->_block) - 1;
xmIndex = find_member(strctP, key, key_len);
if (xmIndex >= 0) {
/* Change the value of an existing member. (But be careful--the
** original and new values might be the same object, so watch
** the order of INCREF and DECREF calls!) */
members = XMLRPC_MEMBLOCK_CONTENTS(_struct_member, &strctP->_block);
member = &members[xmIndex];
/* Juggle our references. */
old_value = member->value;
member->value = valueP;
xmlrpc_INCREF(member->value);
xmlrpc_DECREF(old_value);
} else {
/* Add a new member. */
new_member.key_hash = get_hash(key, key_len);
new_member.key = keyvalP;
new_member.value = valueP;
XMLRPC_MEMBLOCK_APPEND(_struct_member, envP, &strctP->_block,
&new_member, 1);
XMLRPC_FAIL_IF_FAULT(envP);
xmlrpc_INCREF(keyvalP);
xmlrpc_INCREF(valueP);
}
cleanup:
return;
}
/* Note that the order of keys and values is undefined, and may change
when you modify the struct.
*/
void
xmlrpc_struct_read_member(xmlrpc_env * const envP,
xmlrpc_value * const structP,
unsigned int const xmIndex,
xmlrpc_value ** const keyvalP,
xmlrpc_value ** const valueP) {
XMLRPC_ASSERT_ENV_OK(envP);
XMLRPC_ASSERT_VALUE_OK(structP);
XMLRPC_ASSERT_PTR_OK(keyvalP);
XMLRPC_ASSERT_PTR_OK(valueP);
if (structP->_type != XMLRPC_TYPE_STRUCT)
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_TYPE_ERROR, "Attempt to read a struct member "
"of something that is not a struct");
else {
_struct_member * const members =
XMLRPC_MEMBLOCK_CONTENTS(_struct_member, &structP->_block);
size_t const size =
XMLRPC_MEMBLOCK_SIZE(_struct_member, &structP->_block);
if (xmIndex >= size)
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_INDEX_ERROR, "Index %u is beyond the end of "
"the %u-member structure", xmIndex, (unsigned int)size);
else {
_struct_member * const memberP = &members[xmIndex];
*keyvalP = memberP->key;
xmlrpc_INCREF(memberP->key);
*valueP = memberP->value;
xmlrpc_INCREF(memberP->value);
}
}
}
void
xmlrpc_struct_get_key_and_value(xmlrpc_env * const envP,
xmlrpc_value * const structP,
int const xmIndex,
xmlrpc_value ** const keyvalP,
xmlrpc_value ** const valueP) {
/*----------------------------------------------------------------------------
Same as xmlrpc_struct_read_member(), except doesn't take a reference
to the returned value.
This is obsolete.
-----------------------------------------------------------------------------*/
XMLRPC_ASSERT_ENV_OK(envP);
XMLRPC_ASSERT_VALUE_OK(structP);
XMLRPC_ASSERT_PTR_OK(keyvalP);
XMLRPC_ASSERT_PTR_OK(valueP);
if (xmIndex < 0)
xmlrpc_env_set_fault_formatted(
envP, XMLRPC_INDEX_ERROR, "Index %d is negative.");
else {
xmlrpc_struct_read_member(envP, structP, xmIndex, keyvalP, valueP);
if (!envP->fault_occurred) {
xmlrpc_DECREF(*keyvalP);
xmlrpc_DECREF(*valueP);
}
}
if (envP->fault_occurred) {
*keyvalP = NULL;
*valueP = NULL;
}
}
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