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/* [ICS VERSION STRING: unknown] */
#ifndef _IBA_PUBLIC_IXML_H_
#define _IBA_PUBLIC_IXML_H_
#include <iba/ipublic.h>
#include <stdarg.h>
#include <ctype.h>
#if !defined(_GNU_SOURCE)
#define _GNU_SOURCE
#endif
#ifdef VXWORKS
#include <XmlParser/expat.h>
#else
#include <expat.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define DEBUG_IXML_PARSER 0 /* set to 1 to enable DbgOuts in Xml Parser */
/*****************************************************************************/
/* XML declarations common to parser and output */
struct IXmlOutputState;
struct IXmlParserState;
struct _IXML_FIELD;
typedef void (*IXML_FORMAT_FIELD_FUNC)(struct IXmlOutputState *state,
const char *tag, void *data);
/* ATTR_FUNC should output a leading space before 1st attribute
* if there are no attributes to output it can simply do nothing
*/
typedef void (*IXML_FORMAT_ATTR_FUNC)(struct IXmlOutputState *state,
void *data);
typedef void *(*IXML_START_TAG_FUNC)(struct IXmlParserState *state,
void *parent, const char **attr);
typedef void (*IXML_END_TAG_FUNC)(struct IXmlParserState *state,
const struct _IXML_FIELD *field,
void *object, void *parent, XML_Char *content, unsigned len,
boolean valid);
typedef struct _IXML_FIELD {
const char *tag; /* tag name in XML file or "*" */
char format; /* format for tag, see below for choices */
int offset; /* offset in C structure for tag's value */
int size; /* size of field in C structure */
IXML_FORMAT_FIELD_FUNC format_func; /* custom function to format output */
struct _IXML_FIELD *subfields; /* fields within a container tag */
IXML_START_TAG_FUNC start_func; /* function when input <tag> */
IXML_END_TAG_FUNC end_func; /* function when input </tag> */
} IXML_FIELD;
// helper macro, given a structure datatype and a member in structure
// this provides initializers for IXML_FIELD offset and size
#define IXML_FIELD_INFO(TYPE, MEMBER) offset:offsetof(TYPE, MEMBER), size:sizeof(((TYPE*)0)->MEMBER)
// similar helper for 'p' formats, here the size can be specified as upper bound
// for the string. Use IB_INT32_MAX if there is no practical limit
#define IXML_P_FIELD_INFO(TYPE, MEMBER, SIZE) offset:offsetof(TYPE, MEMBER), size:SIZE
/* formats:
* d - %d format for given field size (1, 2, 4, 8)
* Leading and trailing whitespace ignored.
* Undefined if also specify subfields
* u - %u format for given field size (1, 2, 4, 8)
* Leading and trailing whitespace ignored.
* Undefined if also specify subfields
* x - 0x%x format for given field size (1, 2, 4, 8) w/o 0 pad
* Leading and trailing whitespace ignored.
* Undefined if also specify subfields
* h - 0x%x format for given field size (1, 2, 4, 8) with 0 pad
* Leading and trailing whitespace ignored.
* Undefined if also specify subfields
* s - '\0' terminated array of chars, %s format, output until '\0' encountered
* use this for arrays of characters directly in the parent structure
* which are to be '\0' terminated. size indicates size of array
* including space for the '\0' terminator (eg. string is limited to
* size-1 characters).
* Leading and trailing whitespace not trimmed.
* Undefined if also specify subfields
* p - pointer to string, %s format, output until '\0' encountered
* use this for pointers to strings in the parent structure. On input
* the pointer will be allocated. Caller must use MemoryDeallocate
* to free the string when done with it. size indicates upper bound for
* string (not including '\0'). strings longer than this will be truncated
* on input and output, but still '\0' terminated. NULL pointers will
* be skipped on output and not output the tag at all. For optional input
* fields when field is not found will default to value set in structure
* StartTag function, typically NULL.
* Leading and trailing whitespace not trimmed.
* Undefined if also specify subfields
* c - fixed length string input/output until size characters or '\0'
* use this for arrays of characters directly in the parent structure
* which need not be '\0' terminated (such as in IB SA Records).
* size indicates size of array. A '\0' terminator is added only if the
* input string is less than size.
* Leading and trailing whitespace not trimmed.
* Undefined if also specify subfields
* k - invoke 'kustom' format_func for output, can use subfields for input
* Leading and trailing whitespace trimmed.
* Enforces that if subfields are specified, no content is allowed
* It is expected that fields without subfields will have explicit
* end_func to process them.
* t - invoke 'kustom' format_func for output, can use subfields for input
* Leading and trailing whitespace not trimmed.
* Enforces that if subfields are specified, no content is allowed
* It is expected that fields without subfields will have explicit
* end_func to process them.
* w - wildcarded tag format.
* Leading and trailing whitespace not trimmed.
* Enforces that if subfields are encountered, no content is allowed
* An end_func should be supplied to handle input, especially when
* no subfields.
* Typically used in conjunction with tag name of '*' to permit IXml
* parser to implement a stack but manually do tag processing in Start
* and End functions.
* y - trimmed wildcarded tag format.
* Leading and trailing whitespace trimmed.
* Enforces that if subfields are encountered, no content is allowed
* An end_func should be supplied to handle input, especially when
* no subfields.
* Typically used in conjunction with tag name of '*' to permit IXml
* parser to implement a stack but manually do tag processing in Start
* and End functions.
*
* The IXmlParserState and IXmlOutputState structures should be treated
* as opaque structures. format_func, end_func and start_func should not
* use fields in these structures. The necessary information from the state
* is supplied as explicit arguments.
*
* Output:
* each field is processed in order.
* If format_func is specified it will be called (regardless of format)
* with data pointer pointing to present object + offset.
* If no format_func is specified, the offset and size will be used along
* with the format to automatically fetch the field and generate output
* 'k', 't', 'w' and 'y' formats must supply a format_func.
*
* Input Parsing:
* On input parsing, capital letters for format indicate manditory fields
* Present implementation is limited to no more than 64 manditory fields
* per object
*
* On input parsing, if a start_func is supplied an end_func must also
* be supplied. If a end_func is supplied, format is not used to parse
* data but affects whitespace and subfield processing.
* An end_func should be supplied for 'k'/'t'/'w'/'y' formats, otherwise
* the input field will be ignored (recommend use of IXmlParserEndNoop
* rather than NULL for future compatibility).
*
* On output processing, capital letters for format indicate manditory fields
* which are always output regardless of value. lower case leters for format
* are optional fields which will only be output if non-zero/non-NULL.
* For 'k', 't', 'w' and 'y' fields, its up to the supplied format_func to
* decide.
* There are "Optional" variations of most generic format functions which may
* be used by format_func if desired.
*
* For an output only field:
* type/format_func define output
* start_func=NULL, end_func=IXmlParserEndNoop
* For an input only field:
* type/start_func/end_func define input
* format_func=IXmlOutputNoop
* For an input/output field:
* type/start_func/end_func define input
* type/format_func define output
*
* Error handling:
* Failures in XML syntax or calls to IXmlParserPrintError will stop
* the parser with an error. For such parsing failures, the parser
* will unwind and invoke the end_func's for all objects whose start_func
* had been called. Such calls will have valid=FALSE. In this case
* the end_func should undo any operations which the start_func did
* (free object, remove object from lists in parent to which start func added it
* etc).
*
* If a start_func or end_func encounters a fatal error, it should call
* IXmlParserPrintError with an appropriate message. This will output
* a message including input file line, present tag and the message
* provided by the caller. It will also start the parser error and unwind
* sequence.
*
* Once a parser error is detected, no further start_func's will be called.
*
* Object handling:
* The parser assists in tracking object heirachies and provides objects
* to the start_func and end_func. The start_func is expected to return an
* object pointer. This pointer is typically an object/structure allocated
* by the start function to hold the subsequent tags. The pointer returned by
* the start_func will be provided to the end_func as the "object" argument.
* Also if there are nested tags (eg. subfields), the object returned by
* the start_func will also be provided to the nested tags' start_func and
* end_func as the "parent".
*
* Typical operation would be for the start_func to allocate and initialize
* the empty object. For simple structures which simply need to be
* allocated and zeroed, the IXmlParserStartStruct function is provided.
* Then the end_func would verify the consistency of the fields and link the
* object into its parent (add to a list or pointer). If the end_func discovers
* an error it should call IXmlParserPrintError (or Warning if its non-fatal)
* and free the object.
*
* For simple fields (bitfields, needing special handling, etc). The
* start_func can be NULL and the end_func will be given the object and
* parent applicable to the preceeding tag.
*
* The code in ixml_ib.c is a good example of use of the parser.
*
* xml_sample provides a simple example of a parser which uses the
* wildcards to parse and dump any XML file given.
*
* opaxmlindent expands on xml_sample by dumping the XML with nice indentation
*/
/*****************************************************************************/
/* XML Output Declarations */
typedef enum {
/* flags which can be passed to IXmlInit and IXmlOutputInit */
IXML_OUTPUT_FLAG_NONE = 0,
IXML_OUTPUT_FLAG_SERIALIZE = 1, /* compact serialized format */
/* these flags are for internal use only */
IXML_OUTPUT_FLAG_START_NEED_NL = 0x10000, /* start tag output without newline */
IXML_OUTPUT_FLAG_HAD_CONTENT = 0x20000, /* tag had content output */
IXML_OUTPUT_FLAG_IN_START_TAG = 0x40000, /* For printing multiple attrs */
} IXmlOutputFlags_t;
/* these structures should not be directly used by callers */
typedef struct IXmlOutputState {
// TBD - later support output to a memory buffer
FILE *file; /* output file */
unsigned indent; /* level of indent */
unsigned cur_indent; /* level of indent */
int flags;
void *context; /* caller supplied context */
} IXmlOutputState_t;
/* for use in output calls so can early exit */
/* note that IXmlOutputStruct tests this, so in general it does not need to
* be called in other functions
*/
static _inline boolean IXmlOutputFailed(IXmlOutputState_t *state)
{
return (ferror(state->file) != 0);
}
/* get access to caller supplied context for output */
static _inline void* IXmlOutputGetContext(IXmlOutputState_t *state)
{
return state->context;
}
/* indent is additional indent per level */
extern void IXmlInit(IXmlOutputState_t *state, FILE *file,
unsigned indent, IXmlOutputFlags_t flags, void *context);
extern FSTATUS IXmlOutputInit(IXmlOutputState_t *state, FILE *file,
unsigned indent, IXmlOutputFlags_t flags, void *context);
extern void IXmlOutputDestroy(IXmlOutputState_t *state);
extern void IXmlOutputPrint(IXmlOutputState_t *state, const char *format, ...);
extern void IXmlOutputPrintIndent(IXmlOutputState_t *state, const char *format, ...);
extern void IXmlOutputNoop(IXmlOutputState_t *state, const char *tag, void *data);
extern void IXmlOutputStartTag(IXmlOutputState_t *state, const char *tag);
/*
* Print start tag with single attribute and value. Use
* IXmlOutputStartTag() and IXmlOutputAttr*() if you need to print
* multiple attributes.
*/
extern void IXmlOutputStartAttrTag(IXmlOutputState_t *state, const char *tag, void *data, IXML_FORMAT_ATTR_FUNC attr_func);
/*
* Add @attr with @val to current element tag definition.
* This doesn't do any sanitizing on @attr or @val so be careful
* what you put in. Should be called after a call to IXmlOutputStartTag().
* Any call (direct or indirect) to IXmlOutputPrint() or
* IXmlOutputPrintIndent() closes the start tag.
*
* @return FSUCCESS on success, FERROR if not in the start of a tag
*/
extern FSTATUS IXmlOutputAttr(IXmlOutputState_t *state, const char *attr, const char *val);
/*
* Like IXmlOutputAttr() but takes a format string and variable args.
* As with IXmlOutputAttr(), does not sanitize inputs.
*
* @return FSUCCESS on success, FERROR if not in the start of a tag
*/
extern FSTATUS IXmlOutputAttrFmt(IXmlOutputState_t *state, const char *attr, const char *format, ...);
extern void IXmlOutputEndTag(IXmlOutputState_t *state, const char *tag);
extern void IXmlOutputEndTagWithLineno(IXmlOutputState_t *state, const char *tag, unsigned long lineno);
extern void IXmlOutputHexPad8(IXmlOutputState_t *state, const char *tag, uint8 value);
extern void IXmlOutputOptionalHexPad8(IXmlOutputState_t *state, const char *tag, uint8 value);
extern void IXmlOutputHexPad16(IXmlOutputState_t *state, const char *tag, uint16 value);
extern void IXmlOutputOptionalHexPad16(IXmlOutputState_t *state, const char *tag, uint16 value);
extern void IXmlOutputHexPad32(IXmlOutputState_t *state, const char *tag, uint32 value);
extern void IXmlOutputOptionalHexPad32(IXmlOutputState_t *state, const char *tag, uint32 value);
extern void IXmlOutputHexPad64(IXmlOutputState_t *state, const char *tag, uint64 value);
extern void IXmlOutputOptionalHexPad64(IXmlOutputState_t *state, const char *tag, uint64 value);
extern void IXmlOutputInt(IXmlOutputState_t *state, const char *tag, int value);
extern void IXmlOutputOptionalInt(IXmlOutputState_t *state, const char *tag, int value);
extern void IXmlOutputInt64(IXmlOutputState_t *state, const char *tag, int64 value);
extern void IXmlOutputOptionalInt64(IXmlOutputState_t *state, const char *tag, int64 value);
extern void IXmlOutputUint(IXmlOutputState_t *state, const char *tag, unsigned value);
extern void IXmlOutputOptionalUint(IXmlOutputState_t *state, const char *tag, unsigned value);
extern void IXmlOutputUint64(IXmlOutputState_t *state, const char *tag, uint64 value);
extern void IXmlOutputOptionalUint64(IXmlOutputState_t *state, const char *tag, uint64 value);
extern void IXmlOutputHex(IXmlOutputState_t *state, const char *tag, unsigned value);
extern void IXmlOutputOptionalHex(IXmlOutputState_t *state, const char *tag, unsigned value);
extern void IXmlOutputHex64(IXmlOutputState_t *state, const char *tag, uint64 value);
extern void IXmlOutputOptionalHex64(IXmlOutputState_t *state, const char *tag, uint64 value);
extern void IXmlOutputPrintStrLen(IXmlOutputState_t *state, const char* value, int len);
extern void IXmlOutputPrintStr(IXmlOutputState_t *state, const char* value);
extern void IXmlOutputStrLen(IXmlOutputState_t *state, const char *tag, const char* value, int len);
extern void IXmlOutputOptionalStrLen(IXmlOutputState_t *state, const char *tag, const char* value, int len);
extern void IXmlOutputStr(IXmlOutputState_t *state, const char *tag, const char* value);
extern void IXmlOutputOptionalStr(IXmlOutputState_t *state, const char *tag, const char* value);
extern void IXmlOutputStrUint(IXmlOutputState_t *state, const char *tag, const char* str, unsigned value);
extern void IXmlOutputOptionalStrUint(IXmlOutputState_t *state, const char *tag, const char* str, unsigned value);
extern void IXmlOutputStrUint64(IXmlOutputState_t *state, const char *tag, const char* str, uint64 value);
extern void IXmlOutputOptionalStrUint64(IXmlOutputState_t *state, const char *tag, const char* str, uint64 value);
extern void IXmlOutputStrInt(IXmlOutputState_t *state, const char *tag, const char* str, int value);
extern void IXmlOutputOptionalStrInt(IXmlOutputState_t *state, const char *tag, const char* str, int value);
extern void IXmlOutputStruct(IXmlOutputState_t *state, const char *tag, void *data,
IXML_FORMAT_ATTR_FUNC attr_func, const IXML_FIELD *fields);
extern void IXmlOutputOptionalStruct(IXmlOutputState_t *state, const char *tag, void *data, IXML_FORMAT_ATTR_FUNC attr_func, IXML_FIELD *fields);
/*****************************************************************************/
/* XML Parser declarations */
/* these structures should not be directly used by callers */
typedef struct IXmlParserStackEntry {
char *tag; // locally allocated copy
const IXML_FIELD *field;
const IXML_FIELD *subfields;
void *object;
unsigned tags_found; // total subfield tags encountered including dups
uint64 fields_found; // bit mask of indexes into subfields
} IXmlParserStackEntry_t;
#define STACK_DEPTH 100
typedef struct IXmlParserStack {
/* TOS is kept in state->current instead */
unsigned sp; /* if 0, stack is empty */
IXmlParserStackEntry_t entries[STACK_DEPTH]; /* entry 0 is unused */
} IXmlParserStack_t;
/* callbacks by the parser to output errors and warnings */
typedef void (*IXmlParserPrintMessage)(const char *message);
typedef struct IXmlParserState {
// TBD - later support input from a memory buffer
XML_Parser parser;
int flags; /* parser option flags */
unsigned depth; /* how many nested elements deep >= 1 */
unsigned skip; /* skip all elements until we return to this depth */
IXmlParserStackEntry_t current; /* state of current element being parsed */
XML_Char *content; /* text contents of current element */
unsigned len; /* number of characters in content */
IXmlParserStack_t stack; /* stack of parent elements' states */
unsigned error_cnt;
unsigned warning_cnt;
void *context; /* caller supplied context */
IXmlParserPrintMessage printError;
IXmlParserPrintMessage printWarning;
} IXmlParserState_t;
/* get access to caller supplied context for input */
static _inline void* IXmlParserGetContext(IXmlParserState_t *state)
{
return state->context;
}
typedef enum {
/* flags which can be passed to IXmlInit and IXmlOutputInit */
IXML_PARSER_FLAG_NONE = 0,
IXML_PARSER_FLAG_STRICT = 1, /* provide warnings for unknown tags, etc */
} IXmlParserFlags_t;
/* get parser option flags */
extern int IXmlParserGetFlags(IXmlParserState_t *state);
/* get current tag name, returns NULL if no current tag */
extern const char* IXmlParserGetCurrentTag(IXmlParserState_t *state);
/* get parent tag name, returns NULL if no parent tag */
extern const char* IXmlParserGetParentTag(IXmlParserState_t *state);
/* get current Full dotted tag name, returns NULL if no current tag,
* returns pointer to a static buffer which is invalid after next call
* to this function
* In the event of overflow, the string "overflow" is returned
*/
extern const char* IXmlParserGetCurrentFullTag(IXmlParserState_t *state);
/* get count of child tags to current tag, typically called in ParserEnd */
extern unsigned IXmlParserGetChildTagCount(IXmlParserState_t *state);
// set subfields for present tag, only valid to call within ParserStart
// callback. This will override the subfields which were specified for
// the current IXML_FIELD structure
extern void IXmlParserSetSubfields(IXmlParserState_t *state, const IXML_FIELD *subfields);
// set field for present tag, only valid to call within ParserStart
// callback. This will override the field which was specified for
// the matching IXML_FIELD structure
// Beware the ParserEndFunc in field will be called instead of the one in
// the original subfields list which matched this tag
// The current subfields are also set to field->subfields
extern void IXmlParserSetField(IXmlParserState_t *state, const IXML_FIELD *field);
// output an error message and increment error_cnt
extern void IXmlParserPrintError(IXmlParserState_t *state, const char *format, ...);
// output a warning message and increment warning_cnt
extern void IXmlParserPrintWarning(IXmlParserState_t *state, const char *format, ...);
/* helper functions to aid getting field pointer in end_func callbacks */
/* this is useful when implementing reusable end_func's which don't know exact
* datatype of object
*/
static _inline void* IXmlParserGetField(const IXML_FIELD* field, void *object)
{
return (void*)((uintn)object + field->offset);
}
/* helper functions to aid parsing of unsigned hex or decimal fields */
/* return TRUE on success, FALSE on failure
* on failure IXmlParserPrintError called to describe error and move
* parser to Failed state
*/
extern boolean IXmlParseUint8(IXmlParserState_t *state,
XML_Char *content, unsigned len, uint8 *value);
extern boolean IXmlParseUint16(IXmlParserState_t *state,
XML_Char *content, unsigned len, uint16 *value);
extern boolean IXmlParseUint32(IXmlParserState_t *state,
XML_Char *content, unsigned len, uint32 *value);
extern boolean IXmlParseUint64(IXmlParserState_t *state,
XML_Char *content, unsigned len, uint64 *value);
/* helper functions to aid parsing of signed decimal fields */
extern boolean IXmlParseInt8(IXmlParserState_t *state,
XML_Char *content, unsigned len, int8 *value);
extern boolean IXmlParseInt16(IXmlParserState_t *state,
XML_Char *content, unsigned len, int16 *value);
extern boolean IXmlParseInt32(IXmlParserState_t *state,
XML_Char *content, unsigned len, int32 *value);
extern boolean IXmlParseInt64(IXmlParserState_t *state,
XML_Char *content, unsigned len, int64 *value);
/* start_func for a simple structure. Allocates and zeros the structure using
* size specified in XML_FIELD
*/
extern void *IXmlParserStartStruct(IXmlParserState_t *state, void *parent, const char **attr);
/* end tag function which is a noop. Use this with start_func=NULL
* to define XML_FIELDs which are output only
*/
extern void IXmlParserEndNoop(struct IXmlParserState *state,
const IXML_FIELD *field,
void *object, void *parent, XML_Char *content, unsigned len,
boolean valid);
/* return TRUE if current field's contents are empty or all whitespace */
boolean IXmlIsWhitespace(const XML_Char *str, boolean *hasNewline);
/* discard leading and trailing whitespace in str, return new length
* str modified in place
*/
unsigned IXmlTrimWhitespace(XML_Char *str, unsigned len);
extern FSTATUS IXmlParserInit(IXmlParserState_t *state, IXmlParserFlags_t flags,
const IXML_FIELD *subfields, void *object, void *context,
IXmlParserPrintMessage printError,
IXmlParserPrintMessage printWarning,
XML_Memory_Handling_Suite* memsuite);
extern FSTATUS IXmlParserReadFile(IXmlParserState_t *state, FILE *file);
extern void IXmlParserDestroy(IXmlParserState_t *state);
#ifndef VXWORKS
// parse supplied file. filename is only used in error messages
extern FSTATUS IXmlParseFile(FILE *file, const char* filename,
IXmlParserFlags_t flags,
const IXML_FIELD *subfields, void *object, void *context,
IXmlParserPrintMessage printError,
IXmlParserPrintMessage printWarning,
unsigned* tags_found, unsigned *fields_found);
// open and parse input_file
extern FSTATUS IXmlParseInputFile(const char *input_file,
IXmlParserFlags_t flags,
const IXML_FIELD *subfields, void *object, void *context,
IXmlParserPrintMessage printError,
IXmlParserPrintMessage printWarning,
unsigned* tags_found, unsigned *fields_found);
#else
// parse supplied file. filename is only used in error messages
extern FSTATUS IXmlParseFile(FILE *file, const char* filename,
IXmlParserFlags_t flags,
const IXML_FIELD *subfields, void *object, void *context,
IXmlParserPrintMessage printError,
IXmlParserPrintMessage printWarning,
unsigned* tags_found, unsigned *fields_found,
XML_Memory_Handling_Suite* memsuite);
// open and parse input_file
extern FSTATUS IXmlParseInputFile(const char *input_file,
IXmlParserFlags_t flags,
const IXML_FIELD *subfields, void *object, void *context,
IXmlParserPrintMessage printError,
IXmlParserPrintMessage printWarning,
unsigned* tags_found, unsigned *fields_found,
XML_Memory_Handling_Suite* memsuite);
#endif
#ifdef __cplusplus
};
#endif
#endif /* _IBA_PUBLIC_IXML_H_ */