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|
%% options
copyright owner = Dirk Krause
copyright year = 2015-xxxx
license = bsd
%% header
/** @file
Open stream to read a file.
*/
#ifndef DK4CONF_H_INCLUDED
#include "dk4conf.h"
#endif
#ifndef DK4TYPES_H_INCLUDED
#include "dk4types.h"
#endif
#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif
#ifndef DK4STRM_H_INCLUDED
#include "dk4strm.h"
#endif
#ifndef DK4STRMF_H_INCLUDED
#include "dk4strmf.h"
#endif
#ifndef DK4STRMG_H_INCLUDED
#include "dk4strmg.h"
#endif
#ifndef DK4STRMB_H_INCLUDED
#include "dk4strmb.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/** Open a stream to read a file.
CRT on Windows: Optional, disabling CRT reduces functionality
by disabling the gzip and bzip2 compression libraries.
@param filename File name of file to read.
@param erp Error report, may be NULL.
@return Pointer to stream on success, NULL on error.
DK4_E_INVALID_ARGUMENTS if filename is NULL,
DK4_E_MATH_OVERFLOW if ibs or obs is too large,
DK4_E_MEMORY_ALLOCATION_FAILED if allocation of input or output buffer
failed.
*/
dk4_stream_t *
dk4stream_open_file_reader(const dkChar *filename, dk4_er_t *erp);
#ifdef __cplusplus
}
#endif
%% module
#include "dk4conf.h"
#if DK4_ON_WINDOWS && DK4_WIN_DENY_CRT
#ifndef WINDOWS_H_INCLUDED
#include <windows.h>
#define WINDOWS_H_INCLUDED 1
#endif
#ifndef DK4STRMH_H_INCLUDED
#include "dk4strmh.h"
#endif
#endif
#include "dk4strmr.h"
#ifndef DK4FD_H_INCLUDED
#include "dk4fd.h"
#endif
#ifndef DK4PATH_H_INCLUDED
#include "dk4pathd.h"
#endif
#ifndef DK4STRD_H_INCLUDED
#include "dk4strd.h"
#endif
#ifndef DK4FOPD_H_INCLUDED
#include "dk4fopd.h"
#endif
$!trace-include
/** Compression suffixes.
*/
static const dkChar * const dk4strmr_co_su[] = {
$!string-table macro=dkT
.gz
.bz2
.svgz
$!end
};
/** File mode for binary reading.
*/
static const char dk4strmr_c8_mode[] = { "rb" };
/** File mode for binary reading.
*/
static const dkChar dk4strmr_dk_mode[] = { dkT("rb") };
dk4_stream_t *
dk4stream_open_file_reader(const dkChar *filename, dk4_er_t *erp)
{
dk4_stream_t *back = NULL; /* Function result */
const dkChar *p1 = NULL; /* Suffix pointer */
#if DK4_HAVE_ZLIB_H && (!(DK4_ON_WINDOWS && DK4_WIN_DENY_CRT))
gzFile gzf = NULL; /* gzip compressed input file */
#endif
#if DK4_HAVE_BZLIB_H && (!(DK4_ON_WINDOWS && DK4_WIN_DENY_CRT))
BZFILE *bzf = NULL; /* bzip2 compressed input file */
#endif
FILE *fipo = NULL; /* Input file */
#if DK4_ON_WINDOWS && DK4_WIN_DENY_CRT
HANDLE fha = INVALID_HANDLE_VALUE;
DWORD dwattr = (DWORD)0UL;
#endif
int coi = -1; /* Compression algorithm index */
#if DK4_CHAR_SIZE > 1
int fd = -1; /* File descriptor */
#endif
$? "+ dk4stream_open_file_reader \"%!ds\"", filename
if (NULL != filename) {
p1 = dk4path_get_suffix(filename, erp);
if (NULL != p1) { $? ". file name suffix \"%!ds\"", p1
coi = dk4str_array_index(
dk4strmr_co_su, p1, DK4_HAVE_CASE_INSENSITIVE_PATHNAMES
);
if (0 > coi) coi = -1; $? ". coi = %d", coi
}
if (0 != dk4fopen_check(filename, 0, DK4_FOPEN_SC_IS_REGULAR, erp)) {
$? ". fopen check ok"
switch (coi) {
case 1: {
#if DK4_HAVE_BZLIB_H && (!(DK4_ON_WINDOWS && DK4_WIN_DENY_CRT))
#if DK4_CHAR_SIZE > 1
/* +++++ bzip2, wchar_t */
$? ". bzip2 for wchar_t"
fd = dk4fd_wc_open(filename, (DK4_O_RDONLY | DK4_O_BINARY), erp);
if (-1 < fd) {
bzf = BZ2_bzdopen(fd, dk4strmr_c8_mode);
if (NULL != bzf) {
back = dk4stream_open_for_bzfile_with_close(
bzf, DK4_STREAM_READ, 4096, 1024, erp
);
if (NULL == back) {
BZ2_bzclose(bzf);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_OPEN_READ_FAILED);
(void)dk4fd_close(fd, NULL);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_OPEN_READ_FAILED);
}
/* ----- bzip2, wchar_t */
#else
/* +++++ bzip2, char */
$? ". bzip2 for char"
bzf = BZ2_bzopen(filename, dk4strmr_c8_mode);
if (NULL != bzf) {
back = dk4stream_open_for_bzfile_with_close(
bzf, DK4_STREAM_READ, 4096, 1024, erp
);
if (NULL == back) {
BZ2_bzclose(bzf);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_OPEN_READ_FAILED);
}
/* ----- bzip2, char */
#endif
#else
dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
#endif
} break;
case 0: case 2: { $? ". gzip"
#if DK4_HAVE_ZLIB_H && (!(DK4_ON_WINDOWS && DK4_WIN_DENY_CRT))
#if DK4_CHAR_SIZE > 1
$? ". gzip for wide characters"
/* +++++ gzip, wchar_t */
fd = dk4fd_wc_open(filename, (DK4_O_RDONLY | DK4_O_BINARY), erp);
if (-1 < fd) {
gzf = gzdopen(fd, dk4strmr_c8_mode);
if (NULL != gzf) {
back = dk4stream_open_for_gzfile_with_close(
gzf, DK4_STREAM_READ, 4096, 1024, erp
);
if (NULL == back) {
gzclose(gzf);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_OPEN_READ_FAILED);
(void)dk4fd_close(fd, NULL);
}
}
/* ----- gzip, wchar_t */
#else
$? ". gzip for char"
/* +++++ gzip, char */
gzf = gzopen(filename, dk4strmr_c8_mode);
if (NULL != gzf) {
back = dk4stream_open_for_gzfile_with_close(
gzf, DK4_STREAM_READ, 4096, 1024, erp
);
if (NULL == back) {
gzclose(gzf);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_OPEN_READ_FAILED);
}
/* ----- gzip, char */
#endif
#else
dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
#endif
} break;
default: { $? ". simple file"
#if DK4_ON_WINDOWS && DK4_WIN_DENY_CRT
dwattr = FILE_ATTRIBUTE_NORMAL;
dwattr |= FILE_FLAG_BACKUP_SEMANTICS;
dwattr |= FILE_FLAG_SEQUENTIAL_SCAN;
#if DK4_CHAR_SIZE > 1
fha = CreateFileW(
filename, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, dwattr, NULL
);
#else
fha = CreateFileA(
filename, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, dwattr, NULL
);
#endif
if (INVALID_HANDLE_VALUE != fha) {
back = dk4stream_open_for_windows_handle_with_close(
fha, DK4_STREAM_READ, 4096, 1024, erp
);
if (NULL == back) {
(void)CloseHandle(fha);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_OPEN_READ_FAILED);
}
#else
fipo = dk4fopen(
filename, dk4strmr_dk_mode, DK4_FOPEN_SC_IS_REGULAR, erp
);
if (NULL != fipo) { $? ". fopen ok"
back = dk4stream_open_for_file_with_close(
fipo, DK4_STREAM_READ, 4096, 1024, erp
);
if (NULL == back) { $? "! stream open failed"
(void)fclose(fipo);
}
} else { $? "! fipo"
}
#endif
$? ". simple file ended"
} break;
}
} else { $? "! file check failed"
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
} $? "- dk4stream_open_file_reader PTR=%d", TR_IPTR(back)
return back;
}
|
