336 lines
8.3 KiB
C++
336 lines
8.3 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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******************************************************************************
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*
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* Copyright (C) 1998-2015, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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*
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* File ufile.cpp
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*
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* Modification History:
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*
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* Date Name Description
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* 11/19/98 stephen Creation.
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* 03/12/99 stephen Modified for new C API.
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* 06/16/99 stephen Changed T_LocaleBundle to u_locbund
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* 07/19/99 stephen Fixed to use ucnv's default codepage.
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******************************************************************************
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*/
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#include "locmap.h"
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#include "unicode/ustdio.h"
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#if !UCONFIG_NO_CONVERSION
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#include <stdlib.h>
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#include "ufile.h"
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#include "unicode/uloc.h"
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#include "unicode/ures.h"
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#include "unicode/ucnv.h"
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#include "unicode/ustring.h"
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#include "cstring.h"
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#include "cmemory.h"
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#if U_PLATFORM_USES_ONLY_WIN32_API && !defined(fileno)
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/* Windows likes to rename Unix-like functions */
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#define fileno _fileno
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#endif
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static UFILE*
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finit_owner(FILE *f,
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const char *locale,
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const char *codepage,
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UBool takeOwnership
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)
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{
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UErrorCode status = U_ZERO_ERROR;
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UFILE *result;
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if(f == NULL) {
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return 0;
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}
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result = (UFILE*) uprv_malloc(sizeof(UFILE));
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if(result == NULL) {
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return 0;
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}
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uprv_memset(result, 0, sizeof(UFILE));
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result->fFileno = fileno(f);
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result->fFile = f;
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result->str.fBuffer = result->fUCBuffer;
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result->str.fPos = result->fUCBuffer;
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result->str.fLimit = result->fUCBuffer;
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#if !UCONFIG_NO_FORMATTING
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/* if locale is 0, use the default */
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if(u_locbund_init(&result->str.fBundle, locale) == 0) {
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/* DO NOT FCLOSE HERE! */
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uprv_free(result);
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return 0;
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}
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#endif
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/* If the codepage is not "" use the ucnv_open default behavior */
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if(codepage == NULL || *codepage != '\0') {
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result->fConverter = ucnv_open(codepage, &status);
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}
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/* else result->fConverter is already memset'd to NULL. */
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if(U_SUCCESS(status)) {
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result->fOwnFile = takeOwnership;
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}
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else {
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#if !UCONFIG_NO_FORMATTING
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u_locbund_close(&result->str.fBundle);
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#endif
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/* DO NOT fclose here!!!!!! */
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uprv_free(result);
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result = NULL;
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}
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return result;
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}
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U_CAPI UFILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_finit(FILE *f,
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const char *locale,
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const char *codepage)
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{
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return finit_owner(f, locale, codepage, FALSE);
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}
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U_CAPI UFILE* U_EXPORT2
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u_fadopt(FILE *f,
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const char *locale,
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const char *codepage)
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{
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return finit_owner(f, locale, codepage, TRUE);
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}
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U_CAPI UFILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_fopen(const char *filename,
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const char *perm,
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const char *locale,
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const char *codepage)
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{
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UFILE *result;
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FILE *systemFile = fopen(filename, perm);
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if(systemFile == 0) {
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return 0;
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}
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result = finit_owner(systemFile, locale, codepage, TRUE);
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if (!result) {
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/* Something bad happened.
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Maybe the converter couldn't be opened. */
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fclose(systemFile);
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}
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return result; /* not a file leak */
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}
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U_CAPI UFILE* U_EXPORT2
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u_fopen_u(const UChar *filename,
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const char *perm,
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const char *locale,
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const char *codepage)
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{
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UFILE *result;
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char buffer[256];
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u_austrcpy(buffer, filename);
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result = u_fopen(buffer, perm, locale, codepage);
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#if U_PLATFORM_USES_ONLY_WIN32_API
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/* Try Windows API _wfopen if the above fails. */
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if (!result) {
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// TODO: test this code path, including wperm.
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wchar_t wperm[40] = {};
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size_t retVal;
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mbstowcs_s(&retVal, wperm, perm, _TRUNCATE);
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FILE *systemFile = _wfopen((const wchar_t *)filename, wperm);
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if (systemFile) {
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result = finit_owner(systemFile, locale, codepage, TRUE);
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}
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if (!result) {
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/* Something bad happened.
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Maybe the converter couldn't be opened. */
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fclose(systemFile);
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}
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}
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#endif
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return result; /* not a file leak */
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}
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U_CAPI UFILE* U_EXPORT2
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u_fstropen(UChar *stringBuf,
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int32_t capacity,
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const char *locale)
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{
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UFILE *result;
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if (capacity < 0) {
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return NULL;
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}
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result = (UFILE*) uprv_malloc(sizeof(UFILE));
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/* Null pointer test */
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if (result == NULL) {
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return NULL; /* Just get out. */
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}
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uprv_memset(result, 0, sizeof(UFILE));
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result->str.fBuffer = stringBuf;
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result->str.fPos = stringBuf;
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result->str.fLimit = stringBuf+capacity;
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#if !UCONFIG_NO_FORMATTING
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/* if locale is 0, use the default */
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if(u_locbund_init(&result->str.fBundle, locale) == 0) {
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/* DO NOT FCLOSE HERE! */
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uprv_free(result);
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return 0;
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}
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#endif
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return result;
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}
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U_CAPI UBool U_EXPORT2
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u_feof(UFILE *f)
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{
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UBool endOfBuffer;
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if (f == NULL) {
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return TRUE;
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}
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endOfBuffer = (UBool)(f->str.fPos >= f->str.fLimit);
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if (f->fFile != NULL) {
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return endOfBuffer && feof(f->fFile);
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}
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return endOfBuffer;
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}
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U_CAPI void U_EXPORT2
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u_fflush(UFILE *file)
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{
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ufile_flush_translit(file);
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ufile_flush_io(file);
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if (file->fFile) {
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fflush(file->fFile);
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}
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else if (file->str.fPos < file->str.fLimit) {
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*(file->str.fPos++) = 0;
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}
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/* TODO: flush input */
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}
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U_CAPI void
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u_frewind(UFILE *file)
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{
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u_fflush(file);
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ucnv_reset(file->fConverter);
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if (file->fFile) {
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rewind(file->fFile);
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file->str.fLimit = file->fUCBuffer;
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file->str.fPos = file->fUCBuffer;
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}
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else {
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file->str.fPos = file->str.fBuffer;
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}
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}
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U_CAPI void U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_fclose(UFILE *file)
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{
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if (file) {
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u_fflush(file);
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ufile_close_translit(file);
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if(file->fOwnFile)
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fclose(file->fFile);
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#if !UCONFIG_NO_FORMATTING
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u_locbund_close(&file->str.fBundle);
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#endif
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ucnv_close(file->fConverter);
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uprv_free(file);
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}
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}
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U_CAPI FILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_fgetfile( UFILE *f)
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{
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return f->fFile;
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}
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#if !UCONFIG_NO_FORMATTING
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U_CAPI const char* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_fgetlocale( UFILE *file)
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{
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return file->str.fBundle.fLocale;
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}
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U_CAPI int32_t U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_fsetlocale(UFILE *file,
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const char *locale)
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{
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u_locbund_close(&file->str.fBundle);
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return u_locbund_init(&file->str.fBundle, locale) == 0 ? -1 : 0;
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}
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#endif
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U_CAPI const char* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_fgetcodepage(UFILE *file)
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{
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UErrorCode status = U_ZERO_ERROR;
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const char *codepage = NULL;
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if (file->fConverter) {
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codepage = ucnv_getName(file->fConverter, &status);
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if(U_FAILURE(status))
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return 0;
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}
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return codepage;
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}
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U_CAPI int32_t U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_fsetcodepage( const char *codepage,
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UFILE *file)
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{
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UErrorCode status = U_ZERO_ERROR;
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int32_t retVal = -1;
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/* We use the normal default codepage for this system, and not the one for the locale. */
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if ((file->str.fPos == file->str.fBuffer) && (file->str.fLimit == file->str.fBuffer)) {
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ucnv_close(file->fConverter);
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file->fConverter = ucnv_open(codepage, &status);
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if(U_SUCCESS(status)) {
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retVal = 0;
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}
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}
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return retVal;
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}
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U_CAPI UConverter * U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
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u_fgetConverter(UFILE *file)
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{
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return file->fConverter;
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}
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#if !UCONFIG_NO_FORMATTING
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U_CAPI const UNumberFormat* U_EXPORT2 u_fgetNumberFormat(UFILE *file)
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{
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return u_locbund_getNumberFormat(&file->str.fBundle, UNUM_DECIMAL);
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}
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#endif
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#endif
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