Library Reference

Functions
Data Types
Structures
Unions
- mxml_value_u
Constants
- mxml_sax_event_e
- mxml_type_e

Functions

mxmlAdd

Add a node to a tree.

void mxmlAdd (
    mxml_node_t *parent,
    int where,
    mxml_node_t *child,
    mxml_node_t *node
);

Parameters

parent: Parent node
where: Where to add, MXML_ADD_BEFORE or MXML_ADD_AFTER
child: Child node for where or MXML_ADD_TO_PARENT
node: Node to add

Discussion

Adds the specified node to the parent. If the child argument is not NULL, puts the new node before or after the specified child depending on the value of the where argument. If the child argument is NULL, puts the new node at the beginning of the child list (MXML_ADD_BEFORE) or at the end of the child list (MXML_ADD_AFTER). The constant MXML_ADD_TO_PARENT can be used to specify a NULL child pointer.

mxmlDelete

Delete a node and all of its children.

void mxmlDelete (
mxml_node_t *node
);

Parameters

node: Node to delete

Discussion

If the specified node has a parent, this function first removes the node from its parent using the mxmlRemove() function.

Mini-XML 2.4 mxmlElementDeleteAttr

Delete an attribute.

void mxmlElementDeleteAttr (
mxml_node_t *node,
const char *name
);

Parameters

node: Element
name: Attribute name

mxmlElementGetAttr

Get an attribute.

const char *mxmlElementGetAttr (
mxml_node_t *node,
const char *name
);

Parameters

node: Element node
name: Name of attribute

Return Value

Attribute value or NULL

Discussion

This function returns NULL if the node is not an element or the named attribute does not exist.

mxmlElementSetAttr

Set an attribute.

void mxmlElementSetAttr (
    mxml_node_t *node,
    const char *name,
    const char *value
);

Parameters

node: Element node
name: Name of attribute
value: Attribute value

Discussion

If the named attribute already exists, the value of the attribute is replaced by the new string value. The string value is copied into the element node. This function does nothing if the node is not an element.

Mini-XML 2.3 mxmlElementSetAttrf

Set an attribute with a formatted value.

void mxmlElementSetAttrf (
    mxml_node_t *node,
    const char *name,
    const char *format,
    ...
);

Parameters

node: Element node
name: Name of attribute
format: Printf-style attribute value
...: Additional arguments as needed

Discussion

If the named attribute already exists, the value of the attribute is replaced by the new formatted string. The formatted string value is copied into the element node. This function does nothing if the node is not an element.

mxmlEntityAddCallback

Add a callback to convert entities to Unicode.

int mxmlEntityAddCallback (void);

Return Value

0 on success, -1 on failure

mxmlEntityGetName

Get the name that corresponds to the character value.

const char *mxmlEntityGetName (
int val
);

Parameters

val: Character value

Return Value

Entity name or NULL

Discussion

If val does not need to be represented by a named entity, NULL is returned.

mxmlEntityGetValue

Get the character corresponding to a named entity.

int mxmlEntityGetValue (
const char *name
);

Parameters

name: Entity name

Return Value

Character value or -1 on error

Discussion

The entity name can also be a numeric constant. -1 is returned if the name is not known.

mxmlEntityRemoveCallback

Remove a callback.

void mxmlEntityRemoveCallback (void);

mxmlFindElement

Find the named element.

mxml_node_t *mxmlFindElement (
    mxml_node_t *node,
    mxml_node_t *top,
    const char *name,
    const char *attr,
    const char *value,
    int descend
);

Parameters

node: Current node
top: Top node
name: Element name or NULL for any
attr: Attribute name, or NULL for none
value: Attribute value, or NULL for any
descend: Descend into tree - MXML_DESCEND, MXML_NO_DESCEND, or MXML_DESCEND_FIRST

Return Value

Element node or NULL

Discussion

The search is constrained by the name, attribute name, and value; any NULL names or values are treated as wildcards, so different kinds of searches can be implemented by looking for all elements of a given name or all elements with a specific attribute. The descend argument determines whether the search descends into child nodes; normally you will use MXML_DESCEND_FIRST for the initial search and MXML_NO_DESCEND to find additional direct descendents of the node. The top node argument constrains the search to a particular node's children.

mxmlIndexDelete

Delete an index.

void mxmlIndexDelete (
mxml_index_t *ind
);

Parameters

ind: Index to delete

mxmlIndexEnum

Return the next node in the index.

mxml_node_t *mxmlIndexEnum (
mxml_index_t *ind
);

Parameters

ind: Index to enumerate

Return Value

Next node or NULL if there is none

Discussion

Nodes are returned in the sorted order of the index.

mxmlIndexFind

Find the next matching node.

mxml_node_t *mxmlIndexFind (
    mxml_index_t *ind,
    const char *element,
    const char *value
);

Parameters

ind: Index to search
element: Element name to find, if any
value: Attribute value, if any

Return Value

Node or NULL if none found

Discussion

You should call mxmlIndexReset() prior to using this function for the first time with a particular set of "element" and "value" strings. Passing NULL for both "element" and "value" is equivalent to calling mxmlIndexEnum().

mxmlIndexNew

Create a new index.

mxml_index_t *mxmlIndexNew (
    mxml_node_t *node,
    const char *element,
    const char *attr
);

Parameters

node: XML node tree
element: Element to index or NULL for all
attr: Attribute to index or NULL for none

Return Value

New index

Discussion

The index will contain all nodes that contain the named element and/or attribute. If both "element" and "attr" are NULL, then the index will contain a sorted list of the elements in the node tree. Nodes are sorted by element name and optionally by attribute value if the "attr" argument is not NULL.

mxmlIndexReset

Reset the enumeration/find pointer in the index and return the first node in the index.

mxml_node_t *mxmlIndexReset (
mxml_index_t *ind
);

Parameters

ind: Index to reset

Return Value

First node or NULL if there is none

Discussion

This function should be called prior to using mxmlIndexEnum() or mxmlIndexFind() for the first time.

mxmlLoadFd

Load a file descriptor into an XML node tree.

mxml_node_t *mxmlLoadFd (
    mxml_node_t *top,
    int fd,
    mxml_load_cb_t cb
);

Parameters

top: Top node
fd: File descriptor to read from
cb: Callback function or MXML_NO_CALLBACK

Return Value

First node or NULL if the file could not be read.

Discussion

The nodes in the specified file are added to the specified top node. If no top node is provided, the XML file MUST be well-formed with a single parent node like <?xml> for the entire file. The callback function returns the value type that should be used for child nodes. If MXML_NO_CALLBACK is specified then all child nodes will be either MXML_ELEMENT or MXML_TEXT nodes.

The constants MXML_INTEGER_CALLBACK, MXML_OPAQUE_CALLBACK, MXML_REAL_CALLBACK, and MXML_TEXT_CALLBACK are defined for loading child nodes of the specified type.

mxmlLoadFile

Load a file into an XML node tree.

mxml_node_t *mxmlLoadFile (
    mxml_node_t *top,
    FILE *fp,
    mxml_load_cb_t cb
);

Parameters

top: Top node
fp: File to read from
cb: Callback function or MXML_NO_CALLBACK

Return Value

First node or NULL if the file could not be read.

Discussion

mxmlLoadString

Load a string into an XML node tree.

mxml_node_t *mxmlLoadString (
    mxml_node_t *top,
    const char *s,
    mxml_load_cb_t cb
);

Parameters

top: Top node
s: String to load
cb: Callback function or MXML_NO_CALLBACK

Return Value

First node or NULL if the string has errors.

Discussion

The nodes in the specified string are added to the specified top node. If no top node is provided, the XML string MUST be well-formed with a single parent node like <?xml> for the entire string. The callback function returns the value type that should be used for child nodes. If MXML_NO_CALLBACK is specified then all child nodes will be either MXML_ELEMENT or MXML_TEXT nodes.

The constants MXML_INTEGER_CALLBACK, MXML_OPAQUE_CALLBACK, MXML_REAL_CALLBACK, and MXML_TEXT_CALLBACK are defined for loading child nodes of the specified type.

Mini-XML 2.3 mxmlNewCDATA

Create a new CDATA node.

mxml_node_t *mxmlNewCDATA (
mxml_node_t *parent,
const char *data
);

Parameters

parent: Parent node or MXML_NO_PARENT
data: Data string

Return Value

New node

Discussion

The new CDATA node is added to the end of the specified parent's child list. The constant MXML_NO_PARENT can be used to specify that the new CDATA node has no parent. The data string must be nul-terminated and is copied into the new node. CDATA nodes use the MXML_ELEMENT type.

Mini-XML 2.1 mxmlNewCustom

Create a new custom data node.

mxml_node_t *mxmlNewCustom (
    mxml_node_t *parent,
    void *data,
    mxml_custom_destroy_cb_t destroy
);

Parameters

parent: Parent node or MXML_NO_PARENT
data: Pointer to data
destroy: Function to destroy data

Return Value

New node

Discussion

The new custom node is added to the end of the specified parent's child list. The constant MXML_NO_PARENT can be used to specify that the new element node has no parent. NULL can be passed when the data in the node is not dynamically allocated or is separately managed.

mxmlNewElement

Create a new element node.

mxml_node_t *mxmlNewElement (
mxml_node_t *parent,
const char *name
);

Parameters

parent: Parent node or MXML_NO_PARENT
name: Name of element

Return Value

New node

Discussion

The new element node is added to the end of the specified parent's child list. The constant MXML_NO_PARENT can be used to specify that the new element node has no parent.

mxmlNewInteger

Create a new integer node.

mxml_node_t *mxmlNewInteger (
mxml_node_t *parent,
int integer
);

Parameters

parent: Parent node or MXML_NO_PARENT
integer: Integer value

Return Value

New node

Discussion

The new integer node is added to the end of the specified parent's child list. The constant MXML_NO_PARENT can be used to specify that the new integer node has no parent.

mxmlNewOpaque

Create a new opaque string.

mxml_node_t *mxmlNewOpaque (
mxml_node_t *parent,
const char *opaque
);

Parameters

parent: Parent node or MXML_NO_PARENT
opaque: Opaque string

Return Value

New node

Discussion

The new opaque node is added to the end of the specified parent's child list. The constant MXML_NO_PARENT can be used to specify that the new opaque node has no parent. The opaque string must be nul-terminated and is copied into the new node.

mxmlNewReal

Create a new real number node.

mxml_node_t *mxmlNewReal (
mxml_node_t *parent,
double real
);

Parameters

parent: Parent node or MXML_NO_PARENT
real: Real number value

Return Value

New node

Discussion

The new real number node is added to the end of the specified parent's child list. The constant MXML_NO_PARENT can be used to specify that the new real number node has no parent.

mxmlNewText

Create a new text fragment node.

mxml_node_t *mxmlNewText (
    mxml_node_t *parent,
    int whitespace,
    const char *string
);

Parameters

parent: Parent node or MXML_NO_PARENT
whitespace: 1 = leading whitespace, 0 = no whitespace
string: String

Return Value

New node

Discussion

The new text node is added to the end of the specified parent's child list. The constant MXML_NO_PARENT can be used to specify that the new text node has no parent. The whitespace parameter is used to specify whether leading whitespace is present before the node. The text string must be nul-terminated and is copied into the new node.

mxmlNewTextf

Create a new formatted text fragment node.

mxml_node_t *mxmlNewTextf (
    mxml_node_t *parent,
    int whitespace,
    const char *format,
    ...
);

Parameters

parent: Parent node or MXML_NO_PARENT
whitespace: 1 = leading whitespace, 0 = no whitespace
format: Printf-style frmat string
...: Additional args as needed

Return Value

New node

Discussion

The new text node is added to the end of the specified parent's child list. The constant MXML_NO_PARENT can be used to specify that the new text node has no parent. The whitespace parameter is used to specify whether leading whitespace is present before the node. The format string must be nul-terminated and is formatted into the new node.

Mini-XML 2.3 mxmlNewXML

Create a new XML document tree.

mxml_node_t *mxmlNewXML (
const char *version
);

Parameters

version: Version number to use

Return Value

New ?xml node

Discussion

The "version" argument specifies the version number to put in the ?xml element node. If NULL, version 1.0 is assumed.

Mini-XML 2.3 mxmlRelease

Release a node.

int mxmlRelease (
mxml_node_t *node
);

Parameters

node: Node

Return Value

New reference count

Discussion

When the reference count reaches zero, the node (and any children) is deleted via mxmlDelete().

mxmlRemove

Remove a node from its parent.

void mxmlRemove (
mxml_node_t *node
);

Parameters

node: Node to remove

Discussion

Does not free memory used by the node - use mxmlDelete() for that. This function does nothing if the node has no parent.

Mini-XML 2.3 mxmlRetain

Retain a node.

int mxmlRetain (
mxml_node_t *node
);

Parameters

node: Node

Return Value

New reference count

Mini-XML 2.3 mxmlSAXLoadFd

Load a file descriptor into an XML node tree using a SAX callback.

mxml_node_t *mxmlSAXLoadFd (
    mxml_node_t *top,
    int fd,
    mxml_load_cb_t cb,
    mxml_sax_cb_t sax_cb,
    void *sax_data
);

Parameters

top: Top node
fd: File descriptor to read from
cb: Callback function or MXML_NO_CALLBACK
sax_cb: SAX callback or MXML_NO_CALLBACK
sax_data: SAX user data

Return Value

First node or NULL if the file could not be read.

Discussion

Mini-XML 2.3 mxmlSAXLoadFile

Load a file into an XML node tree using a SAX callback.

mxml_node_t *mxmlSAXLoadFile (
    mxml_node_t *top,
    FILE *fp,
    mxml_load_cb_t cb,
    mxml_sax_cb_t sax_cb,
    void *sax_data
);

Parameters

top: Top node
fp: File to read from
cb: Callback function or MXML_NO_CALLBACK
sax_cb: SAX callback or MXML_NO_CALLBACK
sax_data: SAX user data

Return Value

First node or NULL if the file could not be read.

Discussion

Mini-XML 2.3 mxmlSAXLoadString

Load a string into an XML node tree using a SAX callback.

mxml_node_t *mxmlSAXLoadString (
    mxml_node_t *top,
    const char *s,
    mxml_load_cb_t cb,
    mxml_sax_cb_t sax_cb,
    void *sax_data
);

Parameters

top: Top node
s: String to load
cb: Callback function or MXML_NO_CALLBACK
sax_cb: SAX callback or MXML_NO_CALLBACK
sax_data: SAX user data

Return Value

First node or NULL if the string has errors.

Discussion

mxmlSaveAllocString

Save an XML node tree to an allocated string.

char *mxmlSaveAllocString (
mxml_node_t *node,
mxml_save_cb_t cb
);

Parameters

node: Node to write
cb: Whitespace callback or MXML_NO_CALLBACK

Return Value

Allocated string or NULL

Discussion

This function returns a pointer to a string containing the textual representation of the XML node tree. The string should be freed using the free() function when you are done with it. NULL is returned if the node would produce an empty string or if the string cannot be allocated.

The callback argument specifies a function that returns a whitespace string or NULL before and after each element. If MXML_NO_CALLBACK is specified, whitespace will only be added before MXML_TEXT nodes with leading whitespace and before attribute names inside opening element tags.

mxmlSaveFd

Save an XML tree to a file descriptor.

int mxmlSaveFd (
    mxml_node_t *node,
    int fd,
    mxml_save_cb_t cb
);

Parameters

node: Node to write
fd: File descriptor to write to
cb: Whitespace callback or MXML_NO_CALLBACK

Return Value

0 on success, -1 on error.

Discussion

The callback argument specifies a function that returns a whitespace string or NULL before and after each element. If MXML_NO_CALLBACK is specified, whitespace will only be added before MXML_TEXT nodes with leading whitespace and before attribute names inside opening element tags.

mxmlSaveFile

Save an XML tree to a file.

int mxmlSaveFile (
    mxml_node_t *node,
    FILE *fp,
    mxml_save_cb_t cb
);

Parameters

node: Node to write
fp: File to write to
cb: Whitespace callback or MXML_NO_CALLBACK

Return Value

0 on success, -1 on error.

Discussion

mxmlSaveString

Save an XML node tree to a string.

int mxmlSaveString (
    mxml_node_t *node,
    char *buffer,
    int bufsize,
    mxml_save_cb_t cb
);

Parameters

node: Node to write
buffer: String buffer
bufsize: Size of string buffer
cb: Whitespace callback or MXML_NO_CALLBACK

Return Value

Size of string

Discussion

This function returns the total number of bytes that would be required for the string but only copies (bufsize - 1) characters into the specified buffer.

The callback argument specifies a function that returns a whitespace string or NULL before and after each element. If MXML_NO_CALLBACK is specified, whitespace will only be added before MXML_TEXT nodes with leading whitespace and before attribute names inside opening element tags.

Mini-XML 2.3 mxmlSetCDATA

Set the element name of a CDATA node.

int mxmlSetCDATA (
mxml_node_t *node,
const char *data
);

Parameters

node: Node to set
data: New data string

Return Value

0 on success, -1 on failure

Discussion

The node is not changed if it is not a CDATA element node.

Mini-XML 2.1 mxmlSetCustom

Set the data and destructor of a custom data node.

int mxmlSetCustom (
    mxml_node_t *node,
    void *data,
    mxml_custom_destroy_cb_t destroy
);

Parameters

node: Node to set
data: New data pointer
destroy: New destructor function

Return Value

0 on success, -1 on failure

Discussion

The node is not changed if it is not a custom node.

mxmlSetCustomHandlers

Set the handling functions for custom data.

void mxmlSetCustomHandlers (
mxml_custom_load_cb_t load,
mxml_custom_save_cb_t save
);

Parameters

load: Load function
save: Save function

Discussion

The load function accepts a node pointer and a data string and must return 0 on success and non-zero on error.

The save function accepts a node pointer and must return a malloc'd string on success and NULL on error.

mxmlSetElement

Set the name of an element node.

int mxmlSetElement (
mxml_node_t *node,
const char *name
);

Parameters

node: Node to set
name: New name string

Return Value

0 on success, -1 on failure

Discussion

The node is not changed if it is not an element node.

mxmlSetErrorCallback

Set the error message callback.

void mxmlSetErrorCallback (
mxml_error_cb_t cb
);

Parameters

cb: Error callback function

mxmlSetInteger

Set the value of an integer node.

int mxmlSetInteger (
mxml_node_t *node,
int integer
);

Parameters

node: Node to set
integer: Integer value

Return Value

0 on success, -1 on failure

Discussion

The node is not changed if it is not an integer node.

mxmlSetOpaque

Set the value of an opaque node.

int mxmlSetOpaque (
mxml_node_t *node,
const char *opaque
);

Parameters

node: Node to set
opaque: Opaque string

Return Value

0 on success, -1 on failure

Discussion

The node is not changed if it is not an opaque node.

mxmlSetReal

Set the value of a real number node.

int mxmlSetReal (
mxml_node_t *node,
double real
);

Parameters

node: Node to set
real: Real number value

Return Value

0 on success, -1 on failure

Discussion

The node is not changed if it is not a real number node.

mxmlSetText

Set the value of a text node.

int mxmlSetText (
    mxml_node_t *node,
    int whitespace,
    const char *string
);

Parameters

node: Node to set
whitespace: 1 = leading whitespace, 0 = no whitespace
string: String

Return Value

0 on success, -1 on failure

Discussion

The node is not changed if it is not a text node.

mxmlSetTextf

Set the value of a text node to a formatted string.

int mxmlSetTextf (
    mxml_node_t *node,
    int whitespace,
    const char *format,
    ...
);

Parameters

node: Node to set
whitespace: 1 = leading whitespace, 0 = no whitespace
format: Printf-style format string
...: Additional arguments as needed

Return Value

0 on success, -1 on failure

Discussion

The node is not changed if it is not a text node.

Mini-XML 2.3 mxmlSetWrapMargin

Set the the wrap margin when saving XML data.

void mxmlSetWrapMargin (
int column
);

Parameters

column: Column for wrapping

Discussion

Wrapping is disabled when "column" is <= 0.

mxmlWalkNext

Walk to the next logical node in the tree.

mxml_node_t *mxmlWalkNext (
    mxml_node_t *node,
    mxml_node_t *top,
    int descend
);

Parameters

node: Current node
top: Top node
descend: Descend into tree - MXML_DESCEND, MXML_NO_DESCEND, or MXML_DESCEND_FIRST

Return Value

Next node or NULL

Discussion

The descend argument controls whether the first child is considered to be the next node. The top node argument constrains the walk to the node's children.

mxmlWalkPrev

Walk to the previous logical node in the tree.

mxml_node_t *mxmlWalkPrev (
    mxml_node_t *node,
    mxml_node_t *top,
    int descend
);

Parameters

node: Current node
top: Top node
descend: Descend into tree - MXML_DESCEND, MXML_NO_DESCEND, or MXML_DESCEND_FIRST

Return Value

Previous node or NULL

Discussion

The descend argument controls whether the previous node's last child is considered to be the previous node. The top node argument constrains the walk to the node's children.

Mini-XML 2.1 mxml_custom_t

An XML custom value.

typedef struct mxml_custom_s mxml_custom_t;

Members

name: Attribute name
value: Attribute value

Mini-XML 2.1 mxml_custom_s

An XML custom value.

struct mxml_custom_s {
void *data;
mxml_custom_destroy_cb_t destroy;
};

Members

data: Pointer to (allocated) custom data
destroy: Pointer to destructor function

mxml_element_s

An XML element value.

struct mxml_element_s {
    mxml_attr_t *attrs;
    char *name;
    int num_attrs;
};

Members

attrs: Attributes
name: Name of element
num_attrs: Number of attributes

mxml_index_s

An XML node index.

struct mxml_index_s {
    int alloc_nodes;
    char *attr;
    int cur_node;
    mxml_node_t **nodes;
    int num_nodes;
};

Members

alloc_nodes: Allocated nodes in index
attr: Attribute used for indexing or NULL
cur_node: Current node
nodes: Node array
num_nodes: Number of nodes in index

mxml_node_s

An XML node.

struct mxml_node_s {
    struct mxml_node_s *child;
    struct mxml_node_s *last_child;
    struct mxml_node_s *next;
    struct mxml_node_s *parent;
    struct mxml_node_s *prev;
    int ref_count;
    mxml_type_t type;
    void *user_data;
    mxml_value_t value;
};

Members

child: First child node
last_child: Last child node
next: Next node under same parent
parent: Parent node
prev: Previous node under same parent
ref_count: Use count
type: Node type
user_data: User data
value: Node value

mxml_text_s

An XML text value.

struct mxml_text_s {
char *string;
int whitespace;
};

Members

string: Fragment string
whitespace: Leading whitespace?

Unions

mxml_value_u

An XML node value.

union mxml_value_u {
    mxml_custom_t custom;
    mxml_element_t element;
    int integer;
    char *opaque;
    double real;
    mxml_text_t text;
};

Members

custom Mini-XML 2.1: Custom data
element: Element
integer: Integer number
opaque: Opaque string
real: Real number
text: Text fragment

Constants

mxml_sax_event_e

SAX event type.

Constants

MXML_SAX_CDATA: CDATA node
MXML_SAX_COMMENT: Comment node
MXML_SAX_DATA: Data node
MXML_SAX_DIRECTIVE: Processing directive node
MXML_SAX_ELEMENT_CLOSE: Element closed
MXML_SAX_ELEMENT_OPEN: Element opened

mxml_type_e

The XML node type.

Constants

MXML_CUSTOM Mini-XML 2.1: Custom data
MXML_ELEMENT: XML element with attributes
MXML_IGNORE Mini-XML 2.3: Ignore/throw away node
MXML_INTEGER: Integer value
MXML_OPAQUE: Opaque string
MXML_REAL: Real value
MXML_TEXT: Text fragment

Library Reference

Contents

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Mini-XML 2.4 mxmlElementDeleteAttr

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Mini-XML 2.3 mxmlElementSetAttrf

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Mini-XML 2.3 mxmlNewCDATA

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Mini-XML 2.1 mxmlNewCustom

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Mini-XML 2.3 mxmlNewXML

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Mini-XML 2.3 mxmlRelease

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