1 Datatypes for C

This package defines macros which declare functions (or function pointers) for XML callbacks. Callbacks are used for error-message handling, memory allocation and freeing, and stream operations.

This chapter contains this section:

C Datatypes

C Datatypes

Table 1-1 lists all C datatypes and their descriptions.

Table 1-1 Summary of C Datatypes

Datatype	Purpose
oracheck	Checkword for validating data structures.
oraerr	Error code: `0` is success, non-`0` is failure.
oraprop_id	The id of property; if `>= 0` it is valid, if `< 0`, it is invalid.
oramemctx	Opaque memory context.
oraprop	Property name.
oraprop_t	Property value type.
oraprop_v	Value: union of storage for all data types.
orastream	Opaque stream object.
orastreamhdl	Storage for file handles.
xmlcmphow	Constant used for DOM Range comparisons.
xmlctx	Context shared for all documents in an XML session.
xmldfsrct	Specifies input types for `XmlDiff` operations
xmlerr	Numeric error code returned by many functions.
xmlevctx	XML Event context.
xmlhasht	The hash value of an XML tree or sub-tree; also known as a digest.
xmlistream	Generic user-defined input stream.
xmliter	Control structure for DOM2 `NodeIterator` and `TreeWalker`.
xmlnodetype	The numeric type code of a node.
xmlostream	Generic user-defined output stream.
xmlpoint	XPointer point location.
xmlrange	Controls structure for DOM2 Range.
xmlsoapbind	Binding for SOAP connections.
xmlsoapcon	SOAP connection object.
xmlsoapctx	Context for SOAP operations.
xmlsoaprole	Role for a SOAP node.
xmlshowbits	Bit flags used to select which node types to show.
xmlurlacc	This is an enumeration of the known access methods for retrieving data from a URL.
xmlurlhdl	This union contains the handle(s) needed to access URL data, be it a stream or `stdio` pointer, file descriptor(s), and so on.
xmlurlpart	This structure contains the sub-parts of a URL.
xmlxptrloc	XPointer location datatype.
xmlxptrlocset	XPointer location set datatype.
xmlxslobjtype	Type of XSLT object that may be returned.
xmlxslomethod	Type of output produced by the XSLT processor.
xmlxvm	An object of type `xmlxvm` is used for XML document transformation.
xmlxvmcomp	An object of type `xmlxvmcomp` is used for compiling XSL stylesheets.
xmlxvmflags	Control flags for the XSLT compiler.
xmlxvmobjtype	Type of XSLTVM object.
xpctx	XPath top-level context.
xpexpr	XPath expression.
xpobj	XPath object.
xsdctx	XMLSchema validator context.
xslctx	XSL top-level context.
xvmobj	XSLVM processor run-time object; contents are private and must not be accessed by users.

oracheck

Checkword for validating data structures.

Definition

typedef ub4 oracheck;

oraerr

Error code: 0 is success, non-0 is failure.

Definition

typedef ub4 oraerr;

oraprop_id

The id of property; if >= 0 it is valid, if < 0, it is invalid.

Definition

typedef sb2 oraprop_id;

oramemctx

Opaque memory context.

Definition

typedef struct oramemctx oramemctx;

oraprop

Property name.

Definition

typedef struct oraprop {
    oratext    *name_oraprop;
    oraprop_id  id_oraprop;
    oraprop_t   type_oraprop;
    oraprop_v   value_oraprop;
} oraprop;

oraprop_t

Property value type.

Definition

typedef enum {
    ORAPROP_TYPE_BOOLEAN,
    ORAPROP_TYPE_SIGNED,
    ORAPROP_TYPE_UNSIGNED,        
    ORAPROP_TYPE_POINTER
} oraprop_t;

oraprop_v

Value: union of storage for all data types.

Definition

typedef union oraprop_v {
    boolean b_oraprop_v;
    sb4     s_oraprop_v;
    ub4     u_oraprop_v;
    void   *p_oraprop_v;
} oraprop_v;

orastream

Opaque stream object.

Definition

typedef struct orastream orastream;

orastreamhdl

Storage for file handles.

Definition

typedef union orastreamhdl {
    void  *ptr_orastreamhdl;      /* generic pointer stream/file/etc */
    struct {
        sb4 fd_orastreamhdl;     /* file descriptor(s) [FTP needs all 3!] */
        sb4 fd2_orastreamhdl;
        sb4 fd3_orastreamhdl;
    } fds_lpihdl;
} orastreamhdl;

xmlcmphow

Constant used for DOM Range comparisons.

Definition

typedef enum {
    XMLDOM_START_TO_START ,
    XMLDOM_START_TO_END   ,
    XMLDOM_END_TO_END     ,
    XMLDOM_END_TO_START   
} xmlcmphow;

xmlctx

Context shared for all documents in an XML session. Contains encoding information, low-level memory allocation function pointers, error message language or encoding and optional handler function, and so on. Required to load (parse) documents and create DOM, generate SAX, and so on.

Definition

struct xmlctx;
typedef struct xmlctx xmlctx;

xmldfoptype

Operation type, represents one or more operations. Used for passing the diff to a custom Operation Buildder (OB) in XmlDiff().

Definition

typedef enum {
  XMLDF_OP_NONE, /* Should not be set to non-zero for XMLDF_NUM_OP macro below */
  XMLDF_OP_UPDATE,
  XMLDF_OP_RENAME,
  XMLDF_OP_DELETE,
  XMLDF_OP_INSERT_BEFORE,
  XMLDF_OP_APPEND
} xmldfoptype;

xmldfsrct

Specifies input types for XmlDiff operations.

Definition

typedef enum {
   XMLDF_SRCT_NONE ,    /* default is DOM */
   XMLDF_SRCT_DOM,      /* DOM: doc node must be specified */
   XMLDF_SRCT_FILE,     /* file name must be specified */
   XMLDF_SRCT_URL,      /* URL in compiler encoding */
   XMLDF_SRCT_BUFFER,   /* buffer: buffer pointer and length must be specified */
   XMLDF_SRCT_FILEP,    /* FILE */
   XMLDF_SRCT_OSTREAM,  /* orastream: stream pointer must be specified */
   XMLDF_SRCT_DOMNODE   /* DOM node, used with XmlHash() */
} xmldfsrct;

xmlerr

Numeric error code returned by many functions. A zero value indicates success; a nonzero value indicates error.

Definition

typedef enum {
   XMLERR_OK              , /* success return */
   XMLERR_NULL_PTR        , /* NULL pointer */
   XMLERR_NO_MEMORY       , /* out of memory */
   XMLERR_HASH_DUP        , /* duplicate entry in hash table */
   XMLERR_INTERNAL        ,  /* internal error */
   XMLERR_BUFFER_OVERFLOW ,  /* name/quoted string too long */
   XMLERR_BAD_CHILD       ,  /* invalid child for parent */
   XMLERR_EOI             ,  /* unexpected EndOfInformation */
   XMLERR_BAD_MEMCB       ,  /* invalid memory callbacks */
   XMLERR_UNICODE_ALIGN   , /* Unicode data misalignment */
   XMLERR_NODE_TYPE       , /* wrong node type */
   XMLERR_UNCLEAN         , /* context is not clean */
   XMLERR_NESTED_STRINGS  , /* internal: nested open str */
   XMLERR_PROP_NOT_FOUND  , /* property not found */
   XMLERR_SAVE_OVERFLOW   , /* save output overflowed */
   XMLERR_NOT_IMP         , /* feature not implemented */
   XMLERR_NLS_MISMATCH    , /* specify lxglo/lxd or neither*/
   XMLERR_NLS_INIT        , /* error at NLS initialization */
   XMLERR_LEH_INIT        , /* error at LEH initialization */
   XMLERR_LML_INIT        , /* error at LML initialization */
   XMLERR_LPU_INIT          /* error at LPU initialization */
} xmlerr;

xmlevctx

XML Event context.

Definition

typedef  struct {
   void *ctx_xmlevctx;       /* implementation specific context */
   xmlevdisp disp_xmlevctx;  /* dispatch table */         
   ub4 checkword_xmlevctx;   /* checkword for integrity check */
   ub4 flags_xmlevctx;       /* mode; default: expand_entity */
   struct xmlevctx;          /* input xmlevctx; chains the XML Event context */   
} xmlevctx;

xmlevtype

The event type for parser pull events.

Definition

typedef enum  xmlevtype {
   XML_EVENT_FATAL_ERROR,            /* Fatal Error */
   XML_EVENT_BEFORE_START,           /* Before Start Document */
   XML_EVENT_START_DOCUMENT,         /* Indicates Start Document */
   XML_EVENT_START_DTD,              /* Start DTD */
   XML_EVENT_END_DTD,                /* End DTD */
   XML_EVENT_NOTATION_DECLARATION,   /* Notation Decl */
   XML_EVENT_PE_DECLARATION,         /* PE Decl */
   XML_EVENT_UE_DECLARATION,         /* US Decl */
   XML_EVENT_ELEMENT_DECLARATION,    /* Element Decl */ 
   XML_EVENT_ATTLIST_DECLARATION,    /* Attribute Decl */
   XML_EVENT_START_ELEMENT,          /* Start Element */
   XML_EVENT_END_ELEMENT,            /* End Element */
   XML_EVENT_CHARACTERS,             /* Characters (text) */
   XML_EVENT_CHARACTERS_CONT,        /* Characters Continued */
   XML_EVENT_PI,                     /* Processing Instruction */
   XML_EVENT_PI_CONT,                /* Processing Instruction Continued */
   XML_EVENT_COMMENT,                /* Comment */
   XML_EVENT_COMMENT_CONT,           /* Comment Continued */
   XML_EVENT_SPACE,                  /* White Space */
   XML_EVENT_SPACE_CONT,             /* White Space Continued */
   XML_EVENT_ENTITY_REFERENCE,       /* Entity Reference */
   XML_EVENT_CDATA,                  /* CDATA */
   XML_EVENT_CDATA_CONT,             /* CDATA continued */
   XML_EVENT_START_ENTITY,           /* Start Entity */
   XML_EVENT_END_ENTITY,             /* End Entity */
   XML_EVENT_END_DOCUMENT,           /* End Document */
   XML_EVENT_ERROR                   /* Error */
}xmlevtype;

xmlhasht

The hash value of an XML tree or sub-tree; also known as a digest.

If the hash values for two XML trees are equal, the trees are considered equal, to a very high probability; uses the MD5 algorithm.

Definition

struct xmlhasht {
   ub4  l_xmlhasht;   /* lenght of digest in bytes */
   ub1  d_xmlhasht[XMLDF_DIGEST_MAX];   /* the digest */
};
typedef struct xmlhasht xmlhasht;

xmlistream

Generic user-defined input stream. The three function pointers are required (but may be stubs). The context pointer is entirely user-defined; point it to whatever state information is required to manage the stream; it will be passed as first argument to the user functions.

Definition

typedef struct xmlistream {
   XML_STREAM_OPEN_F(
      (*open_xmlistream),
      xctx, 
      sctx, 
      path,
      parts,
      length);
   XML_STREAM_READ_F(
      (*read_xmlistream),
      xctx, 
      sctx, 
      path, 
      dest, 
      size,
      nraw, eoi);
   XML_STREAM_CLOSE_F(
      (*close_xmlistream),
      xctx,
      sctx);
   void *ctx_xmlistream;                         /* user's stream context */
} xmlistream;

xmliter

Control structure for DOM 2 NodeIterator and TreeWalker.

Definition

struct xmliter {
   xmlnode *root_xmliter;   /* root node of the iteration space */
   xmlnode *cur_xmliter;    /* current position iterator ref node */
   ub4      show_xmliter;   /* node filter mask */
   void    *filt_xmliter;   /* node filter function */
   boolean  attach_xmliter; /* is iterator valid? */
   boolean  expan_xmliter;  /* are external entities expanded? */
   boolean  before_xmliter; /* iter position before ref node? */
};
typedef struct xmliter xmliter;
typedef struct xmliter xmlwalk;

xmlnodetype

The numeric type code of a node. 0 means invalid, 1-13 are the standard numberings from DOM 1.0, and higher numbers are for internal use only.

Definition

typedef enum {
    XMLDOM_NONE     , /* bogus node */
    XMLDOM_ELEM     , /* element */
    XMLDOM_ATTR     , /* attribute */
    XMLDOM_TEXT     , /* char data not escaped by CDATA */
    XMLDOM_CDATA    , /* char data escaped by CDATA */
    XMLDOM_ENTREF   , /* entity reference */
    XMLDOM_ENTITY   , /* entity */
    XMLDOM_PI       , /* <?processing instructions?> */
    XMLDOM_COMMENT  , /* <!-- Comments --> */
    XMLDOM_DOC      , /* Document */
    XMLDOM_DTD      , /* DTD */
    XMLDOM_FRAG     , /* Document fragment */
    XMLDOM_NOTATION , /* notation */

    /* Oracle extensions from here on */
    XMLDOM_ELEMDECL , /* DTD element declaration */
    XMLDOM_ATTRDECL , /* DTD attribute declaration */

    /* Content Particles (nodes in element's Content Model) */
    XMLDOM_CPELEM   , /* element */
    XMLDOM_CPCHOICE , /* choice (a|b) */
    XMLDOM_CPSEQ    , /* sequence (a,b) */
    XMLDOM_CPPCDATA , /* #PCDATA */
    XMLDOM_CPSTAR   , /* '*' (zero or more) */
    XMLDOM_CPPLUS   , /* '+' (one or more) */
    XMLDOM_CPOPT    , /* '?' (optional) */
    XMLDOM_CPEND      /* end marker */
} xmlnodetype;

xmlostream

Generic user-defined output stream. The three function pointers are required (but may be stubs). The context pointer is entirely user-defined; point it to whatever state information is required to manage the stream; it will be passed as first argument to the user functions.

Definition

typedef struct xmlostream {
   XML_STREAM_OPEN_F(
      (*open_xmlostream),
      xctx,
      sctx, 
      path, 
      parts,
      length);
   XML_STREAM_WRITE_F(
      (*write_xmlostream),
      xctx, 
      sctx,
      path, 
      src,
      size);
   XML_STREAM_CLOSE_F(
      (*close_xmlostream),
      xctx,
      sctx);
   void *ctx_xmlostream;        /* user's stream context */
} xmlostream;

xmlpoint

XPointer point location.

Definition

typedef struct xmlpoint xmlpoint;

xmlrange

Control structure for DOM 2 Range.

Definition

typedef struct xmlrange {
 xmlnode *startnode_xmlrange;  /* start point container */
 ub4      startofst_xmlrange;  /* start point index */
 xmlnode *endnode_xmlrange;    /* end point container */
 ub4      endofst_xmlrange;    /* end point index */
 xmlnode *doc_xmlrange;        /* document node */
 xmlnode *root_xmlrange;       /* root node of the range */
 boolean  collapsed_xmlrange;  /* is range collapsed? */
 boolean  detached_xmlrange;   /* range invalid, invalidated?*/
} xmlrange;

xmlsoapbind

Binding for SOAP connections. SOAP does not dictate the binding (transport) used for conveying messages; however the HTTP protocol is well-defined and currently the only choice.

Definition

typedef enum xmlsoapbind {
   XMLSOAP_BIND_NONE ,  /* none */
   XMLSOAP_BIND_HTTP    /* HTTP */ } xmlsoapbind;

xmlsoapcon

SOAP connection object. Each distinct connection requires an instance of this type, which contains binding and endpoint information.

Definition

typedef struct xmlsoapcon xmlsoapcon;

xmlsoapctx

Context for SOAP operations. Only a single context is needed and it can be shared by several SOAP messages.

Definition

typedef struct xmlsoapctx xmlsoapctx;

xmlsoaprole

Role for a SOAP node.

Definition

typedef enum xmlsoaprole {
    XMLSOAP_ROLE_UNSET,   /* not specified */
    XMLSOAP_ROLE_NONE,    /* "none" */
    XMLSOAP_ROLE_NEXT,    /* "next" */
    XMLSOAP_ROLE_ULT,     /* "ultimateReceiver" */
    XMLSOAP_ROLE_OTHER    /* other - user defined */
} xmlsoaprole;

xmlshowbits

Bit flags used to select which nodes types to show.

Definition

typedef ub4 xmlshowbits;
#define XMLDOM_SHOW_ALL        ~(ub4)0
#define XMLDOM_SHOW_BIT(ntype) ((ub4)1 << (ntype))
#define XMLDOM_SHOW_ELEM       XMLDOM_SHOW_BIT(XMLDOM_ELEM)
#define XMLDOM_SHOW_ATTR       XMLDOM_SHOW_BIT(XMLDOM_ATTR)
#define XMLDOM_SHOW_TEXT       XMLDOM_SHOW_BIT(XMLDOM_TEXT)
#define XMLDOM_SHOW_CDATA      XMLDOM_SHOW_BIT(XMLDOM_CDATA)
#define XMLDOM_SHOW_ENTREF     XMLDOM_SHOW_BIT(XMLDOM_ENTREF)
#define XMLDOM_SHOW_ENTITY     XMLDOM_SHOW_BIT(XMLDOM_ENTITY)
#define XMLDOM_SHOW_PI         XMLDOM_SHOW_BIT(XMLDOM_PI)
#define XMLDOM_SHOW_COMMENT    XMLDOM_SHOW_BIT(XMLDOM_COMMENT)
#define XMLDOM_SHOW_DOC        XMLDOM_SHOW_BIT(XMLDOM_DOC)
#define XMLDOM_SHOW_DTD        XMLDOM_SHOW_BIT(XMLDOM_DTD)
#define XMLDOM_SHOW_FRAG       XMLDOM_SHOW_BIT(XMLDOM_FRAG)
#define XMLDOM_SHOW_NOTATION   XMLDOM_SHOW_BIT(XMLDOM_NOTATION)
#define XMLDOM_SHOW_DOC_TYPE   XMLDOM_SHOW_BIT(XMLDOM_DOC_TYPE)

xmlurlacc

This is an enumeration of the known access methods for retrieving data from a URL. Open/read/close functions may be plugged in to override the default behavior.

Definition

typedef enum {
    XML_ACCESS_NONE    , /* not specified */
    XML_ACCESS_UNKNOWN , /* specified but unknown */
    XML_ACCESS_FILE    , /* filesystem access */
    XML_ACCESS_HTTP    , /* HTTP */
    XML_ACCESS_FTP     , /* FTP */
    XML_ACCESS_GOPHER  , /* Gopher */
    XML_ACCESS_ORADB   , /* Oracle DB */
    XML_ACCESS_STREAM    /* user-defined stream */
} xmlurlacc;

xmlurlhdl

This union contains the handle(s) needed to access URL data, be it a stream or stdio pointer, file descriptor(s), and so on.

Definition

typedef union xmlurlhdl {
    void  *ptr_xmlurlhdl;  /* generic stream/file/... handle */
    struct {
        sb4 fd1_xmlurlhdl; /* file descriptor(s) [FTP needs all 3!] */
        sb4 fd2_xmlurlhdl;
        sb4 fd3_xmlurlhdl;
    } fds_lpihdl;
} xmlurlhdl;

xmlurlpart

This structure contains the sub-parts of a URL. The original URL is parsed and the pieces copies (NULL-terminated) to a working buffer, then this structure is filled in to point to the parts. Given URL http://user:pwd@baz.com:8080/pub/baz.html;quux=1?huh#fraggy, the example component part from this URL will be shown.

Definition

typedef struct xmlurlpart {
 xmlurlacc access_xmlurlpart;   /* access method code, XMLACCESS_HTTP */
 oratext   *accbuf_xmlurlpart;  /* access method name: "http" */
 oratext   *host_xmlurlpart;    /* hostname:         "baz.com" */
 oratext   *dir_xmlurlpart;     /* directory:        "pub" */
 oratext   *file_xmlurlpart;    /* filename:         "baz.html" */
 oratext   *uid_xmlurlpart;     /* userid/username:  "user" */
 oratext   *passwd_xmlurlpart;  /* password:         "pwd" */
 oratext   *port_xmlurlpart;    /* port (as string): "8080" */
 oratext   *frag_xmlurlpart;    /* fragment:         "fraggy" */
 oratext   *query_xmlurlpart;   /* query:            "huh" */
 oratext   *param_xmlurlpart;   /* parameter:        "quux=1" */
 ub2        portnum_xmlurlpart; /* port (as number): 8080 */
 ub1        abs_xmlurlpart;     /* absolute path?     TRUE */
} xmlurlpart;

xmlxptrloc

XPointer location data type.

Definition

typedef struct xmlxptrloc xmlxptrloc;

xmlxptrlocset

XPointer location set data type.

Definition

typedef struct xmlxptrlocset xmlxptrlocset;

xmlxslobjtype

Type of XSLT object that may be returned.

Definition

typedef enum xmlxslobjtype {
    XMLXSL_TYPE_UNKNOWN , /* Not a defined type */
    XMLXSL_TYPE_NDSET   , /* Node-set */
    XMLXSL_TYPE_BOOL    , /* Boolean value */
    XMLXSL_TYPE_NUM     , /* Numeric value (double) */
    XMLXSL_TYPE_STR     , /* String */
    XMLXSL_TYPE_FRAG      /* Document Fragment */
} xmlxslobjtype;

xmlxslomethod

Type of output to be produced by the XSLT processor.

Definition

typedef enum xmlxslomethod {
 XMLXSL_OUTPUT_UNKNOWN , /* Not defined */
 XMLXSL_OUTPUT_XML     , /* Produce a Document Fragment */
 XMLXSL_OUTPUT_STREAM  , /* Stream out formatted result */
 XMLXSL_OUTPUT_HTML      /* Stream out HTML formatted result */
} xmlxslomethod;

xmlxvm

An object of type xmlxvm is used for XML documents transformation. The contents of xmlxvm are private and must not be accessed by users.

Definition

struct xmlxvm; 
typedef struct xmlxvm xmlxvm;

xmlxvmcomp

An object of type xmlxvmcomp is used for compiling XSL stylesheets. The contents of xmlxvmcomp are private and must not be accessed by users.

Definition

struct xmlxvmcomp; 
typedef struct xmlxvmcomp xmlxvmcomp;

xmlxvmflags

Control flags for the XSLT compiler.

XMLXVM_DEBUG forces compiler to insert debug information into the bytecode.
XMLXVM_STRIPSPACE forces the same behavior as xsl:strip-space elements="*"

Definition

typedef ub4 xmlxvmflag;
#define XMLXVM_NOFLAG   
#define XMLXVM_DEBUG      /* insert debug info into bytecode */
#define XMLXVM_STRIPSPACE /* same as xsl:strip-space elements="*" */

xmlxvmobjtype

Type of XSLTVM object.

Definition

typedef enum xmlxvmobjtype {
    XMLXVM_TYPE_UNKNOWN ,
    XMLXVM_TYPE_NDSET   ,
    XMLXVM_TYPE_BOOL    ,
    XMLXVM_TYPE_NUM     ,
    XMLXVM_TYPE_STR     ,
    XMLXVM_TYPE_FRAG    
} xmlxvmobjtype;

xpctx

XPath top-level context.

Definition

struct xpctx;
typedef struct xpctx xpctx;

xpexpr

XPath expression.

Definition

struct xpexpr;
typedef struct xpexpr xpexpr;

xpobj

Xpath object.

Definition

struct xpobj;typedef struct xpobj xpobj;

xsdctx

XML Schema validator context, created by XmlSchemaCreate and passed to most Schema functions.

Definition

# define XSDCTX_DEFINED
struct xsdctx; typedef struct xsdctx xsdctx;

xslctx

XSL top-level context.

Definition

struct xslctx;
typedef struct xslctx xslctx;

xvmobj

XSLVM processor run-time object; content is private and must not be accessed by users.

Definition

struct xvmobj;
typedef struct xvmobj xvmobj;