fly/fgdata
1
0
Fork 0
Code Activity

- make io.readxml() a lot faster

Browse source 
- documentation update
This commit is contained in:
mfranz 2007-06-30 11:06:36 +00:00
parent 7b1ac37678
commit 122423aa2b
1 changed files with 21 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
Nasal/io.nas
View file

@ -27,25 +27,37 @@ foreach(fmt; keys(ifmts))
caller(0)[0]["is" ~ fmt] = _gen_ifmt_test(ifmts[fmt]); caller(0)[0]["is" ~ fmt] = _gen_ifmt_test(ifmts[fmt]);
# Reads an XML file from an absolute path and returns it as property # Reads an XML file from an absolute path and returns it as property
# tree. All nodes are of type STRING, attributes are written as regular # tree. All nodes are of type STRING. Data are only written to leafs.
# nodes with the optional prefix prepended to the name. If the prefix # Attributes are written as regular nodes with the optional prefix
# is nil, then attributes are ignored. Returns nil on error. # prepended to the name. If the prefix is nil, then attributes are
# ignored. Returns nil on error.
#
# NOTE: this function is meant for importing 'foreign' XML files, *not*
# for reading FlighGear's standard "PropertyList" XML files. For those
# we have better means, like the loadxml/savexml fgcommands. This
# function does neither interpret the "type" nor the "n" (index) or
# "archive" attribute.
#
var readxml = func(file, prefix = "") { var readxml = func(file, prefix = "") {
var stack = [[0, ""]]; var stack = [[{}, ""]];
var node = props.Node.new(); var node = props.Node.new();
var tree = node; # prevent GC var tree = node; # prevent GC
var start = func(name, attr) { var start = func(name, attr) {
stack[-1][0] += 1; # count children var index = stack[-1][0];
append(stack, [0, ""]); if (!contains(index, name))
var index = size(node.getChildren(name)); index[name] = 0;
node = node.getChild(name, index, 1);
node = node.getChild(name, index[name], 1);
if(prefix != nil) if(prefix != nil)
foreach(var n; keys(attr)) foreach(var n; keys(attr))
node.getNode(prefix ~ n, 1).setValue(attr[n]); node.getNode(prefix ~ n, 1).setValue(attr[n]);
index[name] += 1;
append(stack, [{}, ""]);
} }
var end = func(name) { var end = func(name) {
var buf = pop(stack); var buf = pop(stack);
if(!buf[0] and size(buf[1])) if(!size(buf[0]) and size(buf[1]))
node.setValue(buf[1]); node.setValue(buf[1]);
node = node.getParent(); node = node.getParent();
} }