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%% options
copyright owner = Dirk Krause
copyright year = 2016-xxxx
license = bsd
%% header
#ifndef DK4STRM_H_INCLUDED
#include "dk4strm.h"
#endif
#ifndef DK4MEMBUF_H_INCLUDED
#include "dk4membuf.h"
#endif
#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/** Open stream to write to memory buffer.
Closing the resulting stream does not close the memory buffer.
@param mb Destination memory buffer.
@param erp Error report, may be NULL.
@return Valid pointer on success, NULL on error.
*/
dk4_stream_t *
dk4stream_open_membuf_writer(dk4_membuf_t *mb, dk4_er_t *erp);
#ifdef __cplusplus
}
#endif
/* vim: set ai sw=4 ts=4 : */
%% module
#include "dk4mbstrm.h"
static
void
dk4stream_membuf_function(dk4_stream_api_t *api)
{
dk4_membuf_t *mb;
if (NULL != api) {
api->res = 0;
api->sz_out = 0;
mb = (dk4_membuf_t *)(api->d);
if (NULL != mb) {
switch (api->cmd) {
case DK4_STREAM_API_WRITE: {
api->res = dk4membuf_store(
mb, (const void *)(api->b), api->sz_in, NULL
);
if (0 != api->res) {
api->sz_out = api->sz_in;
}
} break;
case DK4_STREAM_API_FLUSH: {
/* Do nothing but indicate success. */
api->res = 1;
} break;
case DK4_STREAM_API_CLOSE: {
/* Do nothing but indicate success. */
api->res = 1;
} break;
default : {
/* Do nothing, calling this is an error. */
} break;
}
}
}
}
dk4_stream_t *
dk4stream_open_membuf_writer(dk4_membuf_t *mb, dk4_er_t *erp)
{
dk4_stream_t *back = NULL;
if (NULL != mb) {
back = dk4stream_open(
mb, dk4stream_membuf_function,
DK4_STREAM_WRITE, 0, DK4MEMBUF_CHUNK_SIZE, erp
);
}
else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
/* vim: set ai sw=4 ts=4 : */
|