CMake/Utilities/cmxmlrpc/xmlrpc_support.c

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2005-02-22 21:08:27 +03:00
/* 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "xmlrpc.h"
#include "xmlrpc_int.h"
#ifdef EFENCE
/* when looking for corruption don't allocate extra slop */
#define BLOCK_ALLOC_MIN (1)
#else
#define BLOCK_ALLOC_MIN (16)
#endif
#define BLOCK_ALLOC_MAX (128 * 1024 * 1024)
#define ERROR_BUFFER_SZ (256)
/*=========================================================================
** Strings
**=======================================================================*/
void
xmlrpc_strfree(const char * const string) {
free((void*)string);
}
/*=========================================================================
** Assertions and Error Handling
**=========================================================================
** Support code for XMLRPC_ASSERT and xmlrpc_env.
*/
void xmlrpc_assertion_failed (char* file, int line)
{
fprintf(stderr, "%s:%d: assertion failed\n", file, line);
abort();
}
static char* default_fault_string = "Not enough memory for error message";
void xmlrpc_env_init (xmlrpc_env* env)
{
XMLRPC_ASSERT(env != NULL);
env->fault_occurred = 0;
env->fault_code = 0;
env->fault_string = NULL;
}
void xmlrpc_env_clean (xmlrpc_env* env)
{
XMLRPC_ASSERT(env != NULL);
/* env->fault_string may be one of three things:
** 1) a NULL pointer
** 2) a pointer to the default_fault_string
** 3) a pointer to a malloc'd fault string
** If we have case (3), we'll need to free it. */
if (env->fault_string && env->fault_string != default_fault_string)
free(env->fault_string);
env->fault_string = XMLRPC_BAD_POINTER;
}
void
xmlrpc_env_set_fault(xmlrpc_env * const env,
int const faultCode,
const char * const faultDescription) {
XMLRPC_ASSERT(env != NULL);
XMLRPC_ASSERT(faultDescription != NULL);
/* Clean up any leftover pointers. */
xmlrpc_env_clean(env);
env->fault_occurred = 1;
env->fault_code = faultCode;
/* Try to copy the fault string. If this fails, use a default. */
env->fault_string = (char*) malloc(strlen(faultDescription) + 1);
if (env->fault_string)
strcpy(env->fault_string, faultDescription);
else
env->fault_string = default_fault_string;
}
void
xmlrpc_env_set_fault_formatted (xmlrpc_env * const envP,
int const code,
const char * const format,
...) {
va_list args;
char buffer[ERROR_BUFFER_SZ];
XMLRPC_ASSERT(envP != NULL);
XMLRPC_ASSERT(format != NULL);
/* Print our error message to the buffer. */
va_start(args, format);
vsnprintf(buffer, ERROR_BUFFER_SZ, format, args);
va_end(args);
/* vsnprintf is guaranteed to terminate the buffer, but we're paranoid. */
buffer[ERROR_BUFFER_SZ - 1] = '\0';
/* Set the fault. */
xmlrpc_env_set_fault(envP, code, buffer);
}
void xmlrpc_fatal_error (char* file, int line, char* msg)
{
fprintf(stderr, "%s:%d: %s\n", file, line, msg);
exit(1);
}
/*=========================================================================
** Resource Limits
**=========================================================================
*/
static size_t limits[XMLRPC_LAST_LIMIT_ID + 1] = {
XMLRPC_NESTING_LIMIT_DEFAULT,
XMLRPC_XML_SIZE_LIMIT_DEFAULT
};
void xmlrpc_limit_set (int limit_id, size_t value)
{
XMLRPC_ASSERT(0 <= limit_id && limit_id <= XMLRPC_LAST_LIMIT_ID);
limits[limit_id] = value;
}
size_t xmlrpc_limit_get (int limit_id)
{
XMLRPC_ASSERT(0 <= limit_id && limit_id <= XMLRPC_LAST_LIMIT_ID);
return limits[limit_id];
}
/*=========================================================================
** xmlrpc_mem_block
**=========================================================================
** We support resizable blocks of memory. We need these just about
** everywhere.
*/
xmlrpc_mem_block *
xmlrpc_mem_block_new(xmlrpc_env * const env,
size_t const size) {
xmlrpc_mem_block* block;
XMLRPC_ASSERT_ENV_OK(env);
block = (xmlrpc_mem_block*) malloc(sizeof(xmlrpc_mem_block));
XMLRPC_FAIL_IF_NULL(block, env, XMLRPC_INTERNAL_ERROR,
"Can't allocate memory block");
xmlrpc_mem_block_init(env, block, size);
XMLRPC_FAIL_IF_FAULT(env);
cleanup:
if (env->fault_occurred) {
if (block)
free(block);
return NULL;
} else {
return block;
}
}
/* Destroy an existing xmlrpc_mem_block, and everything it contains. */
void xmlrpc_mem_block_free (xmlrpc_mem_block* block)
{
XMLRPC_ASSERT(block != NULL);
XMLRPC_ASSERT(block->_block != NULL);
xmlrpc_mem_block_clean(block);
free(block);
}
/* Initialize the contents of the provided xmlrpc_mem_block. */
void xmlrpc_mem_block_init (xmlrpc_env* env,
xmlrpc_mem_block* block,
size_t size)
{
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(block != NULL);
block->_size = size;
if (size < BLOCK_ALLOC_MIN)
block->_allocated = BLOCK_ALLOC_MIN;
else
block->_allocated = size;
block->_block = (void*) malloc(block->_allocated);
if (!block->_block)
xmlrpc_env_set_fault_formatted(
env, XMLRPC_INTERNAL_ERROR,
"Can't allocate %u-byte memory block",
block->_allocated);
}
/* Deallocate the contents of the provided xmlrpc_mem_block, but not the
** block itself. */
void xmlrpc_mem_block_clean (xmlrpc_mem_block* block)
{
XMLRPC_ASSERT(block != NULL);
XMLRPC_ASSERT(block->_block != NULL);
free(block->_block);
block->_block = XMLRPC_BAD_POINTER;
}
/* Get the size of the xmlrpc_mem_block. */
size_t
xmlrpc_mem_block_size(const xmlrpc_mem_block * const block) {
XMLRPC_ASSERT(block != NULL);
return block->_size;
}
/* Get the contents of the xmlrpc_mem_block. */
void *
xmlrpc_mem_block_contents(const xmlrpc_mem_block * const block) {
XMLRPC_ASSERT(block != NULL);
return block->_block;
}
/* Resize an xmlrpc_mem_block, preserving as much of the contents as
** possible. */
void
xmlrpc_mem_block_resize (xmlrpc_env * const env,
xmlrpc_mem_block * const block,
size_t const size) {
size_t proposed_alloc;
void* new_block;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(block != NULL);
/* Check to see if we already have enough space. Maybe we'll get lucky. */
if (size <= block->_allocated) {
block->_size = size;
return;
}
/* Calculate a new allocation size. */
#ifdef EFENCE
proposed_alloc = size;
#else
proposed_alloc = block->_allocated;
while (proposed_alloc < size && proposed_alloc <= BLOCK_ALLOC_MAX)
proposed_alloc *= 2;
#endif /* DEBUG_MEM_ERRORS */
if (proposed_alloc > BLOCK_ALLOC_MAX)
XMLRPC_FAIL(env, XMLRPC_INTERNAL_ERROR, "Memory block too large");
/* Allocate our new memory block. */
new_block = (void*) malloc(proposed_alloc);
XMLRPC_FAIL_IF_NULL(new_block, env, XMLRPC_INTERNAL_ERROR,
"Can't resize memory block");
/* Copy over our data and update the xmlrpc_mem_block struct. */
memcpy(new_block, block->_block, block->_size);
free(block->_block);
block->_block = new_block;
block->_size = size;
block->_allocated = proposed_alloc;
cleanup:
return;
}
/* Append data to an existing xmlrpc_mem_block. */
void
xmlrpc_mem_block_append(xmlrpc_env * const env,
xmlrpc_mem_block * const block,
void * const data,
size_t const len)
{
int size;
XMLRPC_ASSERT_ENV_OK(env);
XMLRPC_ASSERT(block != NULL);
size = block->_size;
xmlrpc_mem_block_resize(env, block, size + len);
XMLRPC_FAIL_IF_FAULT(env);
memcpy(((unsigned char*) block->_block) + size, data, len);
cleanup:
return;
}
void
xmlrpc_traceXml(const char * const label,
const char * const xml,
unsigned int const xmlLength) {
if (getenv("XMLRPC_TRACE_XML")) {
unsigned int nonPrintableCount;
unsigned int i;
nonPrintableCount = 0; /* Initial value */
for (i = 0; i < xmlLength; ++i) {
if (!isprint(xml[i]) && xml[i] != '\n' && xml[i] != '\r')
++nonPrintableCount;
}
if (nonPrintableCount > 0)
fprintf(stderr, "%s contains %u nonprintable characters.\n",
label, nonPrintableCount);
fprintf(stderr, "%s:\n %.*s\n", label, (int)xmlLength, xml);
}
}