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|
/* -*- Mode: c; c-basic-offset: 2 -*-
*
* raptor_general.c - Raptor general routines
*
* $Id$
*
* Copyright (C) 2000-2004, David Beckett http://purl.org/net/dajobe/
* Institute for Learning and Research Technology http://www.ilrt.bristol.ac.uk/
* University of Bristol, UK http://www.bristol.ac.uk/
*
* This package is Free Software and part of Redland http://librdf.org/
*
* It is licensed under the following three licenses as alternatives:
* 1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
* 2. GNU General Public License (GPL) V2 or any newer version
* 3. Apache License, V2.0 or any newer version
*
* You may not use this file except in compliance with at least one of
* the above three licenses.
*
* See LICENSE.html or LICENSE.txt at the top of this package for the
* complete terms and further detail along with the license texts for
* the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
*
*
*/
#ifdef HAVE_CONFIG_H
#include <raptor_config.h>
#endif
#ifdef WIN32
#include <win32_raptor_config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdarg.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
/* Raptor includes */
#include "raptor.h"
#include "raptor_internal.h"
/* prototypes for helper functions */
static void raptor_print_statement_part_as_ntriples(FILE* stream, const void *term, raptor_identifier_type type, raptor_uri* literal_datatype, const unsigned char *literal_language);
/* statics */
static int raptor_initialised;
const char * const raptor_short_copyright_string = "Copyright (C) 2000-2004 David Beckett, ILRT, University of Bristol";
const char * const raptor_copyright_string = "Copyright (C) 2000-2004 David Beckett - http://purl.org/net/dajobe/\nInstitute for Learning and Research Technology - http://www.ilrt.bristol.ac.uk/,\nUniversity of Bristol - http://www.bristol.ac.uk/";
const char * const raptor_version_string = VERSION;
const unsigned int raptor_version_major = RAPTOR_VERSION_MAJOR;
const unsigned int raptor_version_minor = RAPTOR_VERSION_MINOR;
const unsigned int raptor_version_release = RAPTOR_VERSION_RELEASE;
const unsigned int raptor_version_decimal = RAPTOR_VERSION_DECIMAL;
/**
* raptor_init - Initialise the raptor library
*
* Initialises the library.
*
* MUST be called before using any of the raptor APIs.
**/
void
raptor_init(void)
{
if(raptor_initialised)
return;
#ifdef RAPTOR_PARSER_RSS
raptor_init_parser_rss();
#endif
#ifdef RAPTOR_PARSER_TURTLE
raptor_init_parser_turtle();
#endif
#ifdef RAPTOR_PARSER_NTRIPLES
raptor_init_parser_ntriples();
#endif
#ifdef RAPTOR_PARSER_RDFXML
raptor_init_parser_rdfxml();
#endif
raptor_uri_init();
raptor_www_init();
raptor_initialised=1;
}
/**
* raptor_finish - Terminate the raptor library
*
* Cleans up state of the library.
**/
void
raptor_finish(void)
{
if(!raptor_initialised)
return;
raptor_www_finish();
raptor_delete_parser_factories();
raptor_initialised=0;
}
/*
* Thanks to the patch in this Debian bug for the solution
* to the crash inside vsnprintf on some architectures.
*
* "reuse of args inside the while(1) loop is in violation of the
* specs and only happens to work by accident on other systems."
*
* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=104325
*/
#ifndef va_copy
#ifdef __va_copy
#define va_copy(dest,src) __va_copy(dest,src)
#else
#define va_copy(dest,src) (dest) = (src)
#endif
#endif
/* Compatiblity wrapper */
char*
raptor_vsnprintf(const char *message, va_list arguments)
{
char empty_buffer[1];
int len;
char *buffer=NULL;
va_list args_copy;
#ifdef HAVE_C99_VSNPRINTF
/* copy for re-use */
va_copy(args_copy, arguments);
len=vsnprintf(empty_buffer, 1, message, args_copy)+1;
va_end(args_copy);
if(len<=0)
return NULL;
buffer=(char*)RAPTOR_MALLOC(cstring, len);
if(buffer) {
/* copy for re-use */
va_copy(args_copy, arguments);
vsnprintf(buffer, len, message, args_copy);
va_end(args_copy);
}
#else
/* This vsnprintf doesn't return number of bytes required */
int size=2;
while(1) {
buffer=(char*)RAPTOR_MALLOC(cstring, size+1);
if(!buffer)
break;
/* copy for re-use */
va_copy(args_copy, arguments);
len=vsnprintf(buffer, size, message, args_copy);
va_end(args_copy);
if(len>=0)
break;
RAPTOR_FREE(cstring, buffer);
size+=4;
}
#endif
return buffer;
}
/* wrapper */
const char*
raptor_basename(const char *name)
{
char *p;
if((p=strrchr(name, '/')))
name=p+1;
else if((p=strrchr(name, '\\')))
name=p+1;
return name;
}
const char * const raptor_xml_literal_datatype_uri_string="http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral";
const unsigned int raptor_xml_literal_datatype_uri_string_len=53;
/**
* raptor_print_statement - Print a raptor_statement to a stream
* @statement: &raptor_statement object to print
* @stream: &FILE* stream
*
**/
void
raptor_print_statement(const raptor_statement * statement, FILE *stream)
{
fputc('[', stream);
if(statement->subject_type == RAPTOR_IDENTIFIER_TYPE_ANONYMOUS) {
fputs((const char*)statement->subject, stream);
} else {
#ifdef RAPTOR_DEBUG
if(!statement->subject)
RAPTOR_FATAL1("Statement has NULL subject URI\n");
#endif
fputs((const char*)raptor_uri_as_string((raptor_uri*)statement->subject), stream);
}
fputs(", ", stream);
if(statement->predicate_type == RAPTOR_IDENTIFIER_TYPE_ORDINAL)
fprintf(stream, "[rdf:_%d]", *((int*)statement->predicate));
else {
#ifdef RAPTOR_DEBUG
if(!statement->predicate)
RAPTOR_FATAL1("Statement has NULL predicate URI\n");
#endif
fputs((const char*)raptor_uri_as_string((raptor_uri*)statement->predicate), stream);
}
fputs(", ", stream);
if(statement->object_type == RAPTOR_IDENTIFIER_TYPE_LITERAL ||
statement->object_type == RAPTOR_IDENTIFIER_TYPE_XML_LITERAL) {
if(statement->object_type == RAPTOR_IDENTIFIER_TYPE_XML_LITERAL) {
fputc('<', stream);
fputs(raptor_xml_literal_datatype_uri_string, stream);
fputc('>', stream);
} else if(statement->object_literal_datatype) {
fputc('<', stream);
fputs((const char*)raptor_uri_as_string((raptor_uri*)statement->object_literal_datatype), stream);
fputc('>', stream);
}
fputc('"', stream);
fputs((const char*)statement->object, stream);
fputc('"', stream);
} else if(statement->object_type == RAPTOR_IDENTIFIER_TYPE_ANONYMOUS)
fputs((const char*)statement->object, stream);
else if(statement->object_type == RAPTOR_IDENTIFIER_TYPE_ORDINAL)
fprintf(stream, "[rdf:_%d]", *((int*)statement->object));
else {
#ifdef RAPTOR_DEBUG
if(!statement->object)
RAPTOR_FATAL1("Statement has NULL object URI\n");
#endif
fputs((const char*)raptor_uri_as_string((raptor_uri*)statement->object), stream);
}
fputc(']', stream);
}
void
raptor_print_statement_detailed(const raptor_statement * statement,
int detailed, FILE *stream)
{
raptor_print_statement(statement, stream);
}
/**
* raptor_print_ntriples_string - Print an UTF-8 string using N-Triples escapes
* @stream: FILE* stream to print to
* @string: UTF-8 string to print
* @delim: Delimiter character for string (such as ") or \0 for no delim
* escaping.
*
* Return value: non-0 on failure such as bad UTF-8 encoding.
**/
int
raptor_print_ntriples_string(FILE *stream,
const unsigned char *string,
const char delim)
{
unsigned char c;
size_t len=strlen((const char*)string);
int unichar_len;
unsigned long unichar;
for(; (c=*string); string++, len--) {
if((delim && c == delim) || c == '\\') {
fprintf(stream, "\\%c", c);
continue;
}
/* Note: NTriples is ASCII */
if(c == 0x09) {
fputs("\\t", stream);
continue;
} else if(c == 0x0a) {
fputs("\\n", stream);
continue;
} else if(c == 0x0d) {
fputs("\\r", stream);
continue;
} else if(c < 0x20|| c == 0x7f) {
fprintf(stream, "\\u%04X", c);
continue;
} else if(c < 0x80) {
fputc(c, stream);
continue;
}
/* It is unicode */
unichar_len=raptor_utf8_to_unicode_char(NULL, string, len);
if(unichar_len < 0 || unichar_len > (int)len)
/* UTF-8 encoding had an error or ended in the middle of a string */
return 1;
unichar_len=raptor_utf8_to_unicode_char(&unichar, string, len);
if(unichar < 0x10000)
fprintf(stream, "\\u%04lX", unichar);
else
fprintf(stream, "\\U%08lX", unichar);
unichar_len--; /* since loop does len-- */
string += unichar_len; len -= unichar_len;
}
return 0;
}
/**
* raptor_statement_part_as_counted_string - Turns part of raptor statement into a N-Triples format counted string
* @term: &raptor_statement part (subject, predicate, object)
* @type: &raptor_statement part type
* @literal_datatype: &raptor_statement part datatype
* @literal_language: &raptor_statement part language
* @len_p: Pointer to location to store length of new string (if not NULL)
*
* Turns the given @term into an N-Triples escaped string using all the
* escapes as defined in http://www.w3.org/TR/rdf-testcases/#ntriples
*
* The part (subject, predicate, object) of the raptor_statement is
* typically passed in as @term, the part type (subject_type,
* predicate_type, object_type) is passed in as @type. When the part
* is a literal, the @literal_datatype and @literal_language fields
* are set, otherwise NULL (usually object_datatype,
* object_literal_language).
*
* Return value: the new string or NULL on failure. The length of
* the new string is returned in *&len_p if len_p is not NULL.
**/
unsigned char*
raptor_statement_part_as_counted_string(const void *term,
raptor_identifier_type type,
raptor_uri* literal_datatype,
const unsigned char *literal_language,
size_t* len_p)
{
size_t len, term_len, language_len, uri_len;
unsigned char *s, *buffer, *uri_string;
switch(type) {
case RAPTOR_IDENTIFIER_TYPE_LITERAL:
case RAPTOR_IDENTIFIER_TYPE_XML_LITERAL:
term_len=strlen((const char*)term);
len=2+term_len;
if(literal_language && type == RAPTOR_IDENTIFIER_TYPE_LITERAL) {
language_len=strlen((const char*)literal_language);
len+= language_len+1;
}
if(type == RAPTOR_IDENTIFIER_TYPE_XML_LITERAL)
len += 4+raptor_xml_literal_datatype_uri_string_len;
else if(literal_datatype) {
uri_string=raptor_uri_as_counted_string((raptor_uri*)literal_datatype, &uri_len);
len += 4+uri_len;
}
buffer=(unsigned char*)RAPTOR_MALLOC(cstring, len+1);
if(!buffer)
return NULL;
s=buffer;
*s++ ='"';
/* raptor_print_ntriples_string(stream, (const char*)term, '"'); */
strcpy((char*)s, (const char*)term);
s+= term_len;
*s++ ='"';
if(literal_language && type == RAPTOR_IDENTIFIER_TYPE_LITERAL) {
*s++ ='@';
strcpy((char*)s, (const char*)literal_language);
s+= language_len;
}
if(type == RAPTOR_IDENTIFIER_TYPE_XML_LITERAL) {
*s++ ='^';
*s++ ='^';
*s++ ='<';
strcpy((char*)s, raptor_xml_literal_datatype_uri_string);
s+= raptor_xml_literal_datatype_uri_string_len;
*s++ ='>';
} else if(literal_datatype) {
*s++ ='^';
*s++ ='^';
*s++ ='<';
strcpy((char*)s, (const char*)uri_string);
s+= uri_len;
*s++ ='>';
}
*s++ ='\0';
break;
case RAPTOR_IDENTIFIER_TYPE_ANONYMOUS:
len=2+strlen((const char*)term);
buffer=(unsigned char*)RAPTOR_MALLOC(cstring, len+1);
if(!buffer)
return NULL;
s=buffer;
*s++ ='_';
*s++ =':';
strcpy((char*)s, (const char*)term);
break;
case RAPTOR_IDENTIFIER_TYPE_ORDINAL:
/* FIXME - 46 for "<http://www.w3.org/1999/02/22-rdf-syntax-ns#_>" */
len=46 + 13;
buffer=(unsigned char*)RAPTOR_MALLOC(cstring, len+1);
if(!buffer)
return NULL;
sprintf((char*)buffer,
"<http://www.w3.org/1999/02/22-rdf-syntax-ns#_%d>",
*((int*)term));
break;
case RAPTOR_IDENTIFIER_TYPE_RESOURCE:
case RAPTOR_IDENTIFIER_TYPE_PREDICATE:
uri_string=raptor_uri_as_counted_string((raptor_uri*)term, &uri_len);
len=2+uri_len;
buffer=(unsigned char*)RAPTOR_MALLOC(cstring, len+1);
if(!buffer)
return NULL;
s=buffer;
*s++ ='<';
/* raptor_print_ntriples_string(stream, raptor_uri_as_string((raptor_uri*)term), '\0'); */
strcpy((char*)s, (const char*)uri_string);
s+= uri_len;
*s++ ='>';
*s++ ='\0';
break;
default:
RAPTOR_FATAL2("Unknown type %d", type);
}
if(len_p)
*len_p=len;
return buffer;
}
/**
* raptor_statement_part_as_string - Turns part of raptor statement into a N-Triples format string
* @term: &raptor_statement part (subject, predicate, object)
* @type: &raptor_statement part type
* @literal_datatype: &raptor_statement part datatype
* @literal_language: &raptor_statement part language
*
* Turns the given @term into an N-Triples escaped string using all the
* escapes as defined in http://www.w3.org/TR/rdf-testcases/#ntriples
*
* The part (subject, predicate, object) of the raptor_statement is
* typically passed in as @term, the part type (subject_type,
* predicate_type, object_type) is passed in as @type. When the part
* is a literal, the @literal_datatype and @literal_language fields
* are set, otherwise NULL (usually object_datatype,
* object_literal_language).
*
* Return value: the new string or NULL on failure.
**/
unsigned char*
raptor_statement_part_as_string(const void *term,
raptor_identifier_type type,
raptor_uri* literal_datatype,
const unsigned char *literal_language) {
return raptor_statement_part_as_counted_string(term, type,
literal_datatype,
literal_language,
NULL);
}
static void
raptor_print_statement_part_as_ntriples(FILE* stream,
const void *term,
raptor_identifier_type type,
raptor_uri* literal_datatype,
const unsigned char *literal_language)
{
switch(type) {
case RAPTOR_IDENTIFIER_TYPE_LITERAL:
case RAPTOR_IDENTIFIER_TYPE_XML_LITERAL:
fputc('"', stream);
raptor_print_ntriples_string(stream, (const unsigned char*)term, '"');
fputc('"', stream);
if(literal_language && type == RAPTOR_IDENTIFIER_TYPE_LITERAL) {
fputc('@', stream);
fputs((const char*)literal_language, stream);
}
if(type == RAPTOR_IDENTIFIER_TYPE_XML_LITERAL) {
fputs("^^<", stream);
fputs(raptor_xml_literal_datatype_uri_string, stream);
fputc('>', stream);
} else if(literal_datatype) {
fputs("^^<", stream);
fputs((const char*)raptor_uri_as_string((raptor_uri*)literal_datatype), stream);
fputc('>', stream);
}
break;
case RAPTOR_IDENTIFIER_TYPE_ANONYMOUS:
fputs("_:", stream);
fputs((const char*)term, stream);
break;
case RAPTOR_IDENTIFIER_TYPE_ORDINAL:
fprintf(stream, "<http://www.w3.org/1999/02/22-rdf-syntax-ns#_%d>",
*((int*)term));
break;
case RAPTOR_IDENTIFIER_TYPE_RESOURCE:
case RAPTOR_IDENTIFIER_TYPE_PREDICATE:
fputc('<', stream);
raptor_print_ntriples_string(stream, raptor_uri_as_string((raptor_uri*)term), '\0');
fputc('>', stream);
break;
default:
RAPTOR_FATAL2("Unknown type %d", type);
}
}
/**
* raptor_print_statement_as_ntriples - Print a raptor_statement in N-Triples form
* @statement: &raptor_statement to print
* @stream: &FILE* stream
*
**/
void
raptor_print_statement_as_ntriples(const raptor_statement * statement,
FILE *stream)
{
raptor_print_statement_part_as_ntriples(stream,
statement->subject,
statement->subject_type,
NULL, NULL);
fputc(' ', stream);
raptor_print_statement_part_as_ntriples(stream,
statement->predicate,
statement->predicate_type,
NULL, NULL);
fputc(' ', stream);
raptor_print_statement_part_as_ntriples(stream,
statement->object,
statement->object_type,
statement->object_literal_datatype,
statement->object_literal_language);
fputs(" .", stream);
}
int
raptor_check_ordinal(const unsigned char *name) {
int ordinal= -1;
unsigned char c;
while((c=*name++)) {
if(c < '0' || c > '9')
return -1;
if(ordinal <0)
ordinal=0;
ordinal *= 10;
ordinal += (c - '0');
}
return ordinal;
}
/**
* raptor_free_memory - Free memory allocated inside raptor.
* @ptr: memory pointer
*
* Some systems require memory allocated in a library to
* be deallocated in that library. This function allows
* memory allocated by raptor to be freed.
*
* Examples include the result of the '_to_' methods that returns
* allocated memory such as raptor_uri_filename_to_uri_string,
* raptor_uri_filename_to_uri_string
* and raptor_uri_uri_string_to_filename_fragment
*
**/
void
raptor_free_memory(void *ptr)
{
RAPTOR_FREE(void, ptr);
}
/**
* raptor_alloc_memory - Allocate memory inside raptor.
* @size: size of memory to allocate
*
* Some systems require memory allocated in a library to
* be deallocated in that library. This function allows
* memory to be allocated inside the raptor shared library
* that can be freed inside raptor either internally or via
* raptor_free_memory.
*
* Examples include using this in the raptor_generate_id handler
* code to create new strings that will be used internally
* as short identifiers and freed later on by the parsers.
*
* Return value: the address of the allocated memory or NULL on failure
*
**/
void*
raptor_alloc_memory(size_t size)
{
return RAPTOR_MALLOC(void, size);
}
/**
* raptor_calloc_memory - Allocate zeroed array of items inside raptor.
* @nmemb: number of members
* @size: size of item
*
* Some systems require memory allocated in a library to
* be deallocated in that library. This function allows
* memory to be allocated inside the raptor shared library
* that can be freed inside raptor either internally or via
* raptor_free_memory.
*
* Examples include using this in the raptor_generate_id handler
* code to create new strings that will be used internally
* as short identifiers and freed later on by the parsers.
*
* Return value: the address of the allocated memory or NULL on failure
*
**/
void*
raptor_calloc_memory(size_t nmemb, size_t size)
{
return RAPTOR_CALLOC(void, nmemb, size);
}
#if defined (RAPTOR_DEBUG) && defined(HAVE_DMALLOC_H) && defined(RAPTOR_MEMORY_DEBUG_DMALLOC)
#undef malloc
void*
raptor_system_malloc(size_t size)
{
return malloc(size);
}
#undef free
void
raptor_system_free(void *ptr)
{
free(ptr);
}
#endif
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