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%% options
copyright owner = Dirk Krause
copyright year = 2015-xxxx
SPDX-License-Identifier: BSD-3-Clause
%% header
/** @file
Generic dk4_stream_t API for input
and output, implementation for FILE.
CRT on Windows: Required.
*/
#ifndef DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif
#ifndef DK4STRM_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4strm.h"
#else
#include <dktools-4/dk4strm.h>
#endif
#endif
#ifndef STDIO_H_INCLUDED
#include <stdio.h>
#define STDIO_H_INCLUDED 1
#endif
#ifdef __cplusplus
extern "C" {
#endif
/** Low level function to access a FILE.
@param api The stream API structure for arguments and results.
*/
void
dk4stream_file_function(dk4_stream_api_t *api);
/** Low level function to access a FILE and close it on
dk4stream_close().
@param api The stream API structure for arguments and results.
*/
void
dk4stream_file_with_close_function(dk4_stream_api_t *api);
/** Open a stream for an existing file.
@param fipo Existing file, not closed on dk4stream_close().
@param fl Access flag: DK4_STREAM_READ, DK4_STREAM_WRITE
or (DK4_STREAM_READ | DK4_STREAM_WRITE).
@param ibs Input buffer size (0 for default).
@param obs Output buffer size (0 for default).
@param erp Error report, may be NULL.
@return Pointer to stream on success, NULL on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if obj or fct is NULL or fl is invalid,
- DK4_E_MATH_OVERFLOW<br>
if ibs or obs is too large,
- DK4_E_MEMORY_ALLOCATION_FAILED<br>
if allocation of input or output buffer failed.
*/
dk4_stream_t *
dk4stream_open_for_file(
FILE *fipo,
int fl,
size_t ibs,
size_t obs,
dk4_er_t *erp
);
/** Open a stream for an existing file.
@param fipo Existing file, closed on dk4stream_close().
@param fl Access flag: DK4_STREAM_READ,, DK4_STREAM_WRITE
or (DK4_STREAM_READ | DK4_STREAM_WRITE).
@param ibs Input buffer size (0 for default).
@param obs Output buffer size (0 for default).
@param erp Error report, may be NULL.
@return Pointer to stream on success, NULL on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if obj or fct is NULL or fl is invalid,
- DK4_E_MATH_OVERFLOW<br>
if ibs or obs is too large,
- DK4_E_MEMORY_ALLOCATION_FAILED<br>
if allocation of input or output buffer failed.
*/
dk4_stream_t *
dk4stream_open_for_file_with_close(
FILE *fipo,
int fl,
size_t ibs,
size_t obs,
dk4_er_t *erp
);
#ifdef __cplusplus
}
#endif
%% module
#include "dk4conf.h"
#include "dk4strmf.h"
#ifndef STDIO_H_INCLUDED
#include <stdio.h>
#define STDIO_H_INCLUDED 1
#endif
#if DK4_HAVE_ASSERT_H
#ifndef ASSERT_H_INCLUDED
#include <assert.h>
#define ASSERT_H_INCLUDED 1
#endif
#endif
void
dk4stream_file_with_close_function(dk4_stream_api_t *api)
{
FILE *fipo;
size_t res;
#if DK4_USE_ASSERT
assert(NULL != api);
#endif
if (NULL != api) {
api->res = 0;
api->sz_out = 0;
fipo = (FILE *)(api->d);
if (NULL != fipo) {
switch (api->cmd) {
case DK4_STREAM_API_READ: {
res = fread(api->b, 1, api->sz_in, fipo);
api->sz_out = res;
if (0 < res) {
api->res = 1;
}
} break;
case DK4_STREAM_API_WRITE: {
if (0 < api->sz_in) {
res = fwrite(api->b, 1, api->sz_in, fipo);
if (res == api->sz_in) {
api->res = 1;
}
api->sz_out = res;
} else {
api->res = 1;
}
} break;
case DK4_STREAM_API_FLUSH: {
if (0 == fflush(fipo)) {
api->res = 1;
}
} break;
case DK4_STREAM_API_AT_END: {
if (0 != feof(fipo)) {
api->res = 1;
}
} break;
case DK4_STREAM_API_CLOSE: {
if (0 == fclose(fipo)) {
api->res = 1;
}
} break;
}
}
}
}
void
dk4stream_file_function(dk4_stream_api_t *api)
{
#if DK4_USE_ASSERT
assert(NULL != api);
#endif
if (NULL != api) {
switch (api->cmd) {
case DK4_STREAM_API_CLOSE: {
api->res = 1;
} break;
default: {
dk4stream_file_with_close_function(api);
} break;
}
}
}
dk4_stream_t *
dk4stream_open_for_file(
FILE *fipo,
int fl,
size_t ibs,
size_t obs,
dk4_er_t *erp
)
{
#if DK4_USE_ASSERT
assert(NULL != fipo);
#endif
return (
dk4stream_open( (void *)fipo, dk4stream_file_function, fl, ibs, obs, erp )
);
}
dk4_stream_t *
dk4stream_open_for_file_with_close(
FILE *fipo,
int fl,
size_t ibs,
size_t obs,
dk4_er_t *erp
)
{
#if DK4_USE_ASSERT
assert(NULL != fipo);
#endif
return (
dk4stream_open(
(void *)fipo, dk4stream_file_with_close_function, fl, ibs, obs, erp
)
);
}
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