xml2c(1)xml2c(1)NAMExml2c - convert an XML file into C struct/string declarations
SYNOPSISxml2c xmlfile
DESCRIPTIONxml2c reads in an XML file and produces equivalent C source code, suit‐
able for #including in your program. The C version is probably easier
deal with in your code. You don't have to read and parse the XML file
and then look for the nodes you want; instead you just loop through a
bunch of structs. Or maybe you just don't want to distribute extra
files with your app, and would rather build them into the executable.
Example input:
<?xml version="1.0" encoding="utf-8" ?>
<list>
<item id="1" value="17">this item</item>
<item id="2" value="23">that item</item>
<item id="3" value="42">the other item</item>
</list>
Example output:
% xml2c sample.xml
struct _item {
char* id;
char* value;
char* TEXT;
};
struct _list {
struct _item item[3];
int N_item;
};
static struct _list list = {
item: { {
id: "1",
value: "17",
TEXT: "this item",
}, {
id: "2",
value: "23",
TEXT: "that item",
}, {
id: "3",
value: "42",
TEXT: "the other item",
} },
N_item: 3,
};
PROBLEMSxml2c should be able to produce output for any valid XML input file.
However, there are some valid XML inputs for which the C output will
not compile. For example, if there are XML elements with the same name
but in different contexts, xml2c may not detect that they are the same
and will produce two different struct definitions with the same name.
That will result in a C compiler error, even if the two structs have
the exact same fields:
% cat bogus.xml
<?xml version="1.0" encoding="utf-8" ?>
<foo>
<item>this item</item>
<bar>
<item>that item</item>
</bar>
</foo>
% xml2c bogus.xml > bogus.c
% cat bogus.c
struct _item {
char* TEXT;
};
struct _item {
char* TEXT;
};
struct _bar {
struct _item item;
int N_item;
};
struct _foo {
struct _item item;
int N_item;
struct _bar bar;
int N_bar;
};
static struct _foo foo = {
item: {
TEXT: "this item",
},
N_item: 1,
bar: {
item: {
TEXT: "that item",
},
N_item: 1,
},
N_bar: 1,
};
% gcc bogus.c
bogus.c:4: redefinition of `struct _item'
Another case that can result in C compiler errors is if you use
#include to bring multiple xml2c result files into a single .c file.
If two or more of the XML files have elements with the same name, then
the result files will have multiple struct definitions with the same
name, and again that's a compiler error.
AUTHOR
Copyright � 2011 by Jef Poskanzer <jef@mail.acme.com>. All rights
reserved.
15 September 2011 xml2c(1)
