MKD_CALLBACKS(3) | Library Functions Manual | MKD_CALLBACKS(3) |
mkd_callbacks
—
functions that modify link targets
Markdown (libmarkdown, -lmarkdown)
#include
<mkdio.h>
char*
(*mkd_callback_t)
(const
char*, const int,
void*);
void
(*mkd_free_t)
(char
*, void*);
void
mkd_e_url
(MMIOT
*document, mkd_callback_t
edit);
void
mkd_e_flags
(MMIOT
*document, mkd_callback_t
edit);
void
mkd_e_free
(MMIOT
*document, mkd_free_t
dealloc);
void
mkd_e_data
(MMIOT
*document, void
*data);
Discount
provides a small set of data
access functions to let a library user modify the targets given in a `[]'
link, and to add additional flags to the generated link.
The data access functions are passed a character
pointer to the url being generated, the size of the url, and a data pointer
pointing to a user data area (set by the
mkd_e_data
()
function.) After the callback function is called (either
mkd_e_url
()
or
mkd_e_flags
())
the data freeing function (if supplied) is called and passed the character
pointer and user data pointer.
The
mkd_basename
()
function (in the module basename.c) is implemented by means of mkd
callbacks; it modifies urls that start with a `/' so that they begin with a
user-supplied url base by allocating a new string and filling it with the
base + the url. Discount plugs that url in in place of the original, then
calls the basename free function (it only does this when
mkd_e_url
() or mkd_e_flags
()
returns nonzero) to deallocate this memory.
Note that only one level of callbacks are supported; if you wish to do multiple callbacks, you need to write your own code to handle them all.
markdown(1), markdown(3), mkd-line(3), markdown(7), mkd-extensions(7), mmap(2).
basename.c
http://daringfireball.net/projects/markdown/syntax
Error handling is minimal at best.
January 18, 2008 | Mastodon |