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138 lines
3.3 KiB
138 lines
3.3 KiB
// =================================================================================
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// Internet Character Set Conversion: Input from HZ-GB-2312
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// =================================================================================
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#include "pch.hxx"
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#include "HzGbIn.h"
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#include "FEChrCnv.h"
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int HZGB_to_GB2312 (CONV_CONTEXT *pcontext, UCHAR *pHZGB, int HZGB_len, UCHAR *pGB2312, int GB2312_len)
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{
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long lConvertedSize;
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if (!GB2312_len) {
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// Wanted the converted size
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if (!pcontext->pIncc0)
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pcontext->pIncc0 = new CInccHzGbIn;
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if (FAILED(((CInccHzGbIn*)pcontext->pIncc0)->GetStringSizeA(pHZGB, HZGB_len, &lConvertedSize)))
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return -1;
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} else {
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if (!pcontext->pIncc)
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pcontext->pIncc = new CInccHzGbIn;
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if (FAILED(((CInccHzGbIn*)pcontext->pIncc)->ConvertStringA(pHZGB, HZGB_len, pGB2312, GB2312_len, &lConvertedSize)))
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return -1;
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}
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if (!pHZGB) {
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// Let's clean up our context here.
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if (pcontext->pIncc0) {
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delete pcontext->pIncc0;
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pcontext->pIncc0 = NULL;
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}
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if (pcontext->pIncc) {
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delete pcontext->pIncc;
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pcontext->pIncc = NULL;
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}
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return 0;
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}
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return (int)lConvertedSize;
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}
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CInccHzGbIn::CInccHzGbIn()
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{
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pfnNextProc = ConvMain;
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fGBMode = FALSE;
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}
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HRESULT CInccHzGbIn::ConvertByte(BYTE by)
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{
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return (this->*pfnNextProc)(FALSE, by, lNextParam);
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}
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HRESULT CInccHzGbIn::CleanUp()
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{
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return (this->*pfnNextProc)(TRUE, 0, lNextParam);
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}
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HRESULT CInccHzGbIn::ConvMain(BOOL fCleanUp, BYTE by, long lParam)
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{
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HRESULT hr = S_OK;
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if (!fCleanUp) {
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if (!fGBMode) {
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if (by == '~') {
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pfnNextProc = ConvTilde;
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} else {
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hr = Output(by);
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}
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} else {
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if (by >= 0x20 && by <= 0x7e) {
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pfnNextProc = ConvDoubleByte;
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lNextParam = (long)by;
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} else {
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hr = Output(by);
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}
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}
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}
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return hr;
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}
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HRESULT CInccHzGbIn::ConvTilde(BOOL fCleanUp, BYTE by, long lParam)
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{
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pfnNextProc = ConvMain;
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if (!fCleanUp) {
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switch (by) {
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case '~':
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return Output('~');
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case '{':
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fGBMode = TRUE;
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return ResultFromScode(S_OK);
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case '\n':
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// Just eat it
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return ResultFromScode(S_OK);
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default:
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(void)Output('~');
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return ConvertByte(by);
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}
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} else {
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return Output('~');
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}
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}
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HRESULT CInccHzGbIn::ConvDoubleByte(BOOL fCleanUp, BYTE byTrail, long lParam)
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{
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pfnNextProc = ConvMain;
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if (!fCleanUp) {
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if ((BYTE)lParam >= 0x21 && (BYTE)lParam <= 0x77 && byTrail >= 0x21 && byTrail <= 0x7e) { // Check if GB char
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(void)Output((BYTE)lParam | 0x80);
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return Output(byTrail | 0x80);
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} else if ((BYTE)lParam == '~' && byTrail == '}') { // 0x7e7d
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fGBMode = FALSE;
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return ResultFromScode(S_OK);
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} else if ((BYTE)lParam >= 0x78 && (BYTE)lParam <= 0x7d && byTrail >= 0x21 && byTrail <= 0x7e) { // Check if non standard extended code
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(void)Output(0xa1); // Output blank box symbol
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return Output(0xf5);
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} else if ((BYTE)lParam == '~') {
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(void)Output('~'); // Output blank box symbol
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return Output(byTrail);
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} else if ((BYTE)lParam == ' ') {
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return Output(byTrail);
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} else if (byTrail == ' ') {
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(void)Output(0xa1); // Output space symbol
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return Output(0xa1);
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} else {
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(void)Output((BYTE)lParam);
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return Output(byTrail);
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}
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} else {
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return Output((BYTE)lParam);
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}
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}
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