/*
*******************************************************************************
*
* Copyright (C) 1998-2015, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
*
* File ucbuf.c
*
* Modification History:
*
* Date Name Description
* 05/10/01 Ram Creation.
*
* This API reads in files and returns UChars
*******************************************************************************
*/
#include "unicode/ucnv.h"
#include "filestrm.h"
#if !UCONFIG_NO_CONVERSION
#ifndef UCBUF_H
#define UCBUF_H 1
typedef struct UCHARBUF UCHARBUF;
/**
* End of file value
*/
#define U_EOF 0xFFFFFFFF
/**
* Error value if a sequence cannot be unescaped
*/
#define U_ERR 0xFFFFFFFE
typedef struct ULine ULine;
struct ULine {
UChar *name;
int32_t len;
};
/**
* Opens the UCHARBUF with the given file stream and code page for conversion
* @param fileName Name of the file to open.
* @param codepage The encoding of the file stream to convert to Unicode.
* If *codepoge is NULL on input the API will try to autodetect
* popular Unicode encodings
* @param showWarning Flag to print out warnings to STDOUT
* @param buffered If TRUE performs a buffered read of the input file. If FALSE reads
* the whole file into memory and converts it.
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
* @return pointer to the newly opened UCHARBUF
*/
U_CAPI UCHARBUF* U_EXPORT2
ucbuf_open(const char* fileName,const char** codepage,UBool showWarning, UBool buffered, UErrorCode* err);
/**
* Gets a UTF-16 code unit at the current position from the converted buffer
* and increments the current position
* @param buf Pointer to UCHARBUF structure
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
*/
U_CAPI int32_t U_EXPORT2
ucbuf_getc(UCHARBUF* buf,UErrorCode* err);
/**
* Gets a UTF-32 code point at the current position from the converted buffer
* and increments the current position
* @param buf Pointer to UCHARBUF structure
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
*/
U_CAPI int32_t U_EXPORT2
ucbuf_getc32(UCHARBUF* buf,UErrorCode* err);
/**
* Gets a UTF-16 code unit at the current position from the converted buffer after
* unescaping and increments the current position. If the escape sequence is for UTF-32
* code point (\\Uxxxxxxxx) then a UTF-32 codepoint is returned
* @param buf Pointer to UCHARBUF structure
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
*/
U_CAPI int32_t U_EXPORT2
ucbuf_getcx32(UCHARBUF* buf,UErrorCode* err);
/**
* Gets a pointer to the current position in the internal buffer and length of the line.
* It imperative to make a copy of the returned buffere before performing operations on it.
* @param buf Pointer to UCHARBUF structure
* @param len Output param to receive the len of the buffer returned till end of the line
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
* Error: U_TRUNCATED_CHAR_FOUND
* @return Pointer to the internal buffer, NULL if EOF
*/
U_CAPI const UChar* U_EXPORT2
ucbuf_readline(UCHARBUF* buf,int32_t* len, UErrorCode* err);
/**
* Resets the buffers and the underlying file stream.
* @param buf Pointer to UCHARBUF structure
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
*/
U_CAPI void U_EXPORT2
ucbuf_rewind(UCHARBUF* buf,UErrorCode* err);
/**
* Returns a pointer to the internal converted buffer
* @param buf Pointer to UCHARBUF structure
* @param len Pointer to int32_t to receive the lenth of buffer
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
* @return Pointer to internal UChar buffer
*/
U_CAPI const UChar* U_EXPORT2
ucbuf_getBuffer(UCHARBUF* buf,int32_t* len,UErrorCode* err);
/**
* Closes the UCHARBUF structure members and cleans up the malloc'ed memory
* @param buf Pointer to UCHARBUF structure
*/
U_CAPI void U_EXPORT2
ucbuf_close(UCHARBUF* buf);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
U_DEFINE_LOCAL_OPEN_POINTER(LocalUCHARBUFPointer, UCHARBUF, ucbuf_close);
U_NAMESPACE_END
#endif
/**
* Rewinds the buffer by one codepoint. Does not rewind over escaped characters.
*/
U_CAPI void U_EXPORT2
ucbuf_ungetc(int32_t ungetChar,UCHARBUF* buf);
/**
* Autodetects the encoding of the file stream. Only Unicode charsets are autodectected.
* Some Unicode charsets are stateful and need byte identifiers to be converted also to bring
* the converter to correct state for converting the rest of the stream. So the UConverter parameter
* is necessary.
* If the charset was autodetected, the caller must close both the input FileStream
* and the converter.
*
* @param fileName The file name to be opened and encoding autodected
* @param conv Output param to receive the opened converter if autodetected; NULL otherwise.
* @param cp Output param to receive the detected encoding
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
* @return The input FileStream if its charset was autodetected; NULL otherwise.
*/
U_CAPI FileStream * U_EXPORT2
ucbuf_autodetect(const char* fileName, const char** cp,UConverter** conv,
int32_t* signatureLength, UErrorCode* status);
/**
* Autodetects the encoding of the file stream. Only Unicode charsets are autodectected.
* Some Unicode charsets are stateful and need byte identifiers to be converted also to bring
* the converter to correct state for converting the rest of the stream. So the UConverter parameter
* is necessary.
* If the charset was autodetected, the caller must close the converter.
*
* @param fileStream The file stream whose encoding is to be detected
* @param conv Output param to receive the opened converter if autodetected; NULL otherwise.
* @param cp Output param to receive the detected encoding
* @param err is a pointer to a valid <code>UErrorCode</code> value. If this value
* indicates a failure on entry, the function will immediately return.
* On exit the value will indicate the success of the operation.
* @return Boolean whether the Unicode charset was autodetected.
*/
U_CAPI UBool U_EXPORT2
ucbuf_autodetect_fs(FileStream* in, const char** cp, UConverter** conv, int32_t* signatureLength, UErrorCode* status);
/**
* Returns the approximate size in UChars required for converting the file to UChars
*/
U_CAPI int32_t U_EXPORT2
ucbuf_size(UCHARBUF* buf);
U_CAPI const char* U_EXPORT2
ucbuf_resolveFileName(const char* inputDir, const char* fileName, char* target, int32_t* len, UErrorCode* status);
#endif
#endif