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Update README.md examples.

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Michael R Sweet 2024-03-20 11:32:06 -04:00
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@ -87,26 +87,24 @@ Mini-XML provides a single header file which you include:
#include <mxml.h>
Nodes (elements, comments, processing directives, integers, opaque strings, real
numbers, and text strings) are represented by `mxml_node_t` objects. New nodes
can be created using the mxmlNewComment, mxmlNewCustom, mxmlNewDeclaration,
mxmlNewDirective, mxmlNewElement, mxmlNewInteger, mxmlNewOpaque, mxmlNewReal,
and mxmlNewText functions. The top node must be the "?xml ...?" processing
instruction.
Nodes (elements, comments, declarations, integers, opaque strings, processing
instructions, real numbers, and text strings) are represented by `mxml_node_t`
pointers. New nodes can be created using the mxmlNewXxx functions. The top
node must be the `<?xml ...?>` processing instruction.
You load an XML file using the mxmlLoadFilename function:
mxml_node_t *tree;
tree = mxmlLoadFilename(NULL, "filename.xml",
/*load_cb*/NULL, /*load_cbdata*/NULL);
tree = mxmlLoadFilename(/*top*/NULL, /*options*/NULL,
"example.xml");
Similarly, you save an XML file using the mxmlSaveFilename function:
mxml_node_t *tree;
mxmlSaveFilename(tree, "filename.xml",
/*load_cb*/NULL, /*load_cbdata*/NULL);
mxmlSaveFilename(tree, /*options*/NULL,
"filename.xml");
There are variations of these functions for loading from or saving to file
descriptors, `FILE` pointers, strings, and IO callbacks.
@ -114,38 +112,37 @@ descriptors, `FILE` pointers, strings, and IO callbacks.
You can find a named element/node using the mxmlFindElement function:
mxml_node_t *node = mxmlFindElement(tree, tree, "name", "attr",
"value", MXML_DESCEND);
"value", MXML_DESCEND_ALL);
The `name`, `attr`, and `value` arguments can be passed as `NULL` to act as
wildcards, e.g.:
/* Find the first "a" element */
node = mxmlFindElement(tree, tree, "a", NULL, NULL, MXML_DESCEND);
node = mxmlFindElement(tree, tree, "a", NULL, NULL, MXML_DESCEND_ALL);
/* Find the first "a" element with "href" attribute */
node = mxmlFindElement(tree, tree, "a", "href", NULL, MXML_DESCEND);
node = mxmlFindElement(tree, tree, "a", "href", NULL, MXML_DESCEND_ALL);
/* Find the first "a" element with "href" to a URL */
node = mxmlFindElement(tree, tree, "a", "href",
"http://www.minixml.org/",
MXML_DESCEND);
"https://www.msweet.org/mxml", MXML_DESCEND_ALL);
/* Find the first element with a "src" attribute*/
node = mxmlFindElement(tree, tree, NULL, "src", NULL, MXML_DESCEND);
node = mxmlFindElement(tree, tree, NULL, "src", NULL, MXML_DESCEND_ALL);
/* Find the first element with a "src" = "foo.jpg" */
node = mxmlFindElement(tree, tree, NULL, "src", "foo.jpg",
MXML_DESCEND);
MXML_DESCEND_ALL);
You can also iterate with the same function:
mxml_node_t *node;
for (node = mxmlFindElement(tree, tree, "name", NULL, NULL,
MXML_DESCEND);
MXML_DESCEND_ALL);
node != NULL;
node = mxmlFindElement(node, tree, "name", NULL, NULL,
MXML_DESCEND))
MXML_DESCEND_ALL))
{
... do something ...
}
@ -166,7 +163,7 @@ retrieve the corresponding value from a node:
double realvalue = mxmlGetReal(node);
int whitespacevalue;
bool whitespacevalue;
const char *textvalue = mxmlGetText(node, &whitespacevalue);
Finally, once you are done with the XML data, use the mxmlDelete function to