117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
/*
|
|
******************************************************************************
|
|
* Copyright (C) 1998-2001, International Business Machines Corporation and *
|
|
* others. All Rights Reserved. *
|
|
******************************************************************************
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "unicode/utypes.h"
|
|
#include "unicode/unistr.h"
|
|
|
|
#include "GUISupport.h"
|
|
#include "UnicodeReader.h"
|
|
|
|
|
|
/*
|
|
* Read the text from a file. The text must start with a Unicode Byte
|
|
* Order Mark (BOM) so that we know what order to read the bytes in.
|
|
*/
|
|
const UChar *UnicodeReader::readFile(const char *fileName, GUISupport *guiSupport, int32_t &charCount)
|
|
{
|
|
FILE *f;
|
|
int32_t fileSize;
|
|
|
|
UChar *charBuffer;
|
|
char *byteBuffer;
|
|
char startBytes[4] = {'\xA5', '\xA5', '\xA5', '\xA5'};
|
|
char errorMessage[128];
|
|
char *cp = "";
|
|
int32_t signatureLength = 0;
|
|
|
|
f = fopen(fileName, "rb");
|
|
|
|
if( f == NULL ) {
|
|
sprintf(errorMessage,"Couldn't open %s: %s \n", fileName, strerror(errno));
|
|
guiSupport->postErrorMessage(errorMessage, "Text File Error");
|
|
return 0;
|
|
}
|
|
|
|
fseek(f, 0, SEEK_END);
|
|
fileSize = ftell(f);
|
|
|
|
fseek(f, 0, SEEK_SET);
|
|
fread(startBytes, sizeof(char), 4, f);
|
|
|
|
if (startBytes[0] == '\xFE' && startBytes[1] == '\xFF') {
|
|
cp = "UTF-16BE";
|
|
signatureLength = 2;
|
|
} else if (startBytes[0] == '\xFF' && startBytes[1] == '\xFE') {
|
|
if (startBytes[2] == '\x00' && startBytes[3] == '\x00') {
|
|
cp = "UTF-32LE";
|
|
signatureLength = 4;
|
|
} else {
|
|
cp = "UTF-16LE";
|
|
signatureLength = 2;
|
|
}
|
|
} else if (startBytes[0] == '\xEF' && startBytes[1] == '\xBB' && startBytes[2] == '\xBF') {
|
|
cp = "UTF-8";
|
|
signatureLength = 3;
|
|
} else if (startBytes[0] == '\x0E' && startBytes[1] == '\xFE' && startBytes[2] == '\xFF') {
|
|
cp = "SCSU";
|
|
signatureLength = 3;
|
|
} else if (startBytes[0] == '\x00' && startBytes[1] == '\x00' &&
|
|
startBytes[2] == '\xFE' && startBytes[3] == '\xFF') {
|
|
cp = "UTF-32BE";
|
|
signatureLength = 4;
|
|
} else {
|
|
sprintf(errorMessage, "Couldn't detect the encoding of %s: (%2.2X, %2.2X, %2.2X, %2.2X)\n", fileName,
|
|
startBytes[0], startBytes[1], startBytes[2], startBytes[3]);
|
|
guiSupport->postErrorMessage(errorMessage, "Text File Error");
|
|
fclose(f);
|
|
return 0;
|
|
}
|
|
|
|
fileSize -= signatureLength;
|
|
fseek(f, signatureLength, SEEK_SET);
|
|
byteBuffer = new char[fileSize];
|
|
|
|
if(byteBuffer == 0) {
|
|
sprintf(errorMessage,"Couldn't get memory for reading %s: %s \n", fileName, strerror(errno));
|
|
guiSupport->postErrorMessage(errorMessage, "Text File Error");
|
|
fclose(f);
|
|
return 0;
|
|
}
|
|
|
|
fread(byteBuffer, sizeof(char), fileSize, f);
|
|
if( ferror(f) ) {
|
|
sprintf(errorMessage,"Couldn't read %s: %s \n", fileName, strerror(errno));
|
|
guiSupport->postErrorMessage(errorMessage, "Text File Error");
|
|
fclose(f);
|
|
delete[] byteBuffer;
|
|
return 0;
|
|
}
|
|
fclose(f);
|
|
|
|
UnicodeString myText(byteBuffer, fileSize, cp);
|
|
|
|
delete[] byteBuffer;
|
|
|
|
charCount = myText.length();
|
|
charBuffer = new UChar[charCount + 1];
|
|
if(charBuffer == 0) {
|
|
sprintf(errorMessage,"Couldn't get memory for reading %s: %s \n", fileName, strerror(errno));
|
|
guiSupport->postErrorMessage(errorMessage, "Text File Error");
|
|
return 0;
|
|
}
|
|
|
|
myText.extract(0, myText.length(), charBuffer);
|
|
charBuffer[charCount] = 0; // NULL terminate for easier reading in the debugger
|
|
|
|
return charBuffer;
|
|
}
|
|
|