int fb_DevFileReadLineEncodWstr( FB_FILE *handle, FB_WCHAR *dst, ssize_t max_chars )
{
int res;
FB_LOCK();
FILE* fp = (FILE *)handle->opaque;
if( fp == stdout || fp == stderr )
fp = stdin;
if( fp == NULL ) {
FB_UNLOCK();
return fb_ErrorSetNum( FB_RTERROR_ILLEGALFUNCTIONCALL );
}
/* Clear string first, we're only using += concat assign below... */
dst[0] = _LC('\0');
/* Read one byte at a time until CR and/or LF is found.
The fb_FileGetDataEx() will handle the decoding. The length to read
is specified in wchars, not bytes, because we're passing TRUE for
is_unicode. */
while( TRUE ) {
FB_WCHAR c[2];
size_t len;
res = fb_FileGetDataEx( handle, 0, c, 1, &len, FALSE, TRUE );
if( (res != FB_RTERROR_OK) || (len == 0) )
break;
/* CR? Check for following LF too, and skip it if it's there */
if( c[0] == _LC('\r') ) {
res = fb_FileGetDataEx( handle, 0, c, 1, &len, FALSE, TRUE );
if( (res != FB_RTERROR_OK) || (len == 0) )
break;
/* No LF? Ok then, don't skip it yet */
if( c[0] != _LC('\n') )
fb_FilePutBackEx( handle, c, 1 );
break;
}
/* LF? */
if( c[0] == _LC('\n') ) {
break;
}
/* Any other char? Append to string, and continue... */
c[1] = _LC('\0');
fb_WstrConcatAssign( dst, max_chars, c );
}
FB_UNLOCK();
return res;
}
/*:::::*/
static FB_WCHAR hReadChar( FB_INPUTCTX *ctx )
{
/* device? */
if( FB_HANDLE_USED(ctx->handle) )
{
int res;
FB_WCHAR c;
size_t len;
res = fb_FileGetDataEx( ctx->handle, 0, &c, 1, &len, FALSE, TRUE );
if( (res != FB_RTERROR_OK) || (len == 0) )
return WEOF;
return c;
}
/* console.. */
else
{
if( ctx->index >= FB_STRSIZE( &ctx->str.len ) )
return WEOF;
else
return (unsigned char)ctx->str.data[ctx->index++];
}
}
/*:::::*/
int fb_FileGetWstrEx( FB_FILE *handle, fb_off_t pos, FB_WCHAR *dst, int dst_chars, size_t *bytesread )
{
int res;
if( bytesread )
*bytesread = 0;
if( !FB_HANDLE_USED(handle) )
return fb_ErrorSetNum( FB_RTERROR_ILLEGALFUNCTIONCALL );
/* perform call ... but only if there's data ... */
if( (dst != NULL) && (dst_chars > 0) )
{
size_t chars;
res = fb_FileGetDataEx( handle, pos, (void *)dst, dst_chars, &chars, TRUE, TRUE );
/* add the null-term */
if( res == FB_RTERROR_OK )
dst[chars] = _LC('\0');
if( bytesread )
*bytesread = chars;
}
else
res = fb_ErrorSetNum( FB_RTERROR_ILLEGALFUNCTIONCALL );
return res;
}
/*:::::*/
static int hReadChar
(
FB_INPUTCTX *ctx
)
{
/* device? */
if( FB_HANDLE_USED(ctx->handle) )
{
int res;
int c;
size_t len;
res = fb_FileGetDataEx( ctx->handle, 0, &c, 1, &len, FALSE, FALSE );
if( (res != FB_RTERROR_OK) || (len == 0) )
return EOF;
return c & 0x000000FF;
}
/* console.. */
else
{
if( ctx->index >= FB_STRSIZE( &ctx->str ) )
return EOF;
else
return ctx->str.data[ctx->index++];
}
}
/*:::::*/
FBCALL int fb_FileGetLargeIOB( int fnum, long long pos, void *dst, unsigned int chars, unsigned int *bytesread )
{
return fb_FileGetDataEx( FB_FILE_TO_HANDLE(fnum),
pos,
dst,
chars,
bytesread,
TRUE,
FALSE );
}
/*:::::*/
FBCALL int fb_FileGetLarge( int fnum, long long pos, void *dst, unsigned int chars )
{
return fb_FileGetDataEx( FB_FILE_TO_HANDLE(fnum),
pos,
dst,
chars,
NULL,
TRUE,
FALSE );
}
/* Can fb_FileGetData() be removed? it's not used by the rtlib
* nor is it referenced by fbc? Compatibility with old libs? [jeffm]
*/
int fb_FileGetData( int fnum, fb_off_t pos, void *dst, size_t chars, int adjust_rec_pos )
{
return fb_FileGetDataEx( FB_FILE_TO_HANDLE(fnum),
pos,
dst,
chars,
NULL,
adjust_rec_pos,
FALSE );
}
static int fb_hFileLineInputEx
(
FB_FILE *handle,
void *dst,
ssize_t dst_len,
int fillrem
)
{
ssize_t len, readlen;
char buffer[BUFFER_LEN];
eInputMode mode = eIM_Invalid;
if( !FB_HANDLE_USED(handle) )
return fb_ErrorSetNum( FB_RTERROR_ILLEGALFUNCTIONCALL );
FB_LOCK();
if( handle->hooks->pfnReadLine != NULL ) {
mode = eIM_ReadLine;
} else if( handle->hooks->pfnRead != NULL &&
handle->hooks->pfnEof != NULL )
{
mode = eIM_Read;
}
if( mode==eIM_Invalid ) {
FB_UNLOCK();
return fb_ErrorSetNum( FB_RTERROR_ILLEGALFUNCTIONCALL );
}
switch( mode ) {
case eIM_Read:
/* This is the VFS-compatible way to read a line ... but it's slow */
len = readlen = 0;
while (!handle->hooks->pfnEof(handle)) {
int do_add = FALSE, do_break = FALSE;
size_t read_len;
int res = fb_FileGetDataEx( handle, 0, buffer+len, 1, &read_len, FALSE, FALSE );
if( res==FB_RTERROR_OK && read_len==1) {
char ch = buffer[len];
if( ch==13 ) {
res = fb_FileGetDataEx( handle, 0, &ch, 1, &read_len, FALSE, FALSE );
if( res==FB_RTERROR_OK && ch!=10 && read_len==1) {
fb_FilePutBackEx( handle, &ch, 1 );
}
ch = 10;
}
if( ch==10 ) {
do_add = do_break = TRUE;
} else {
do_add = len==(sizeof(buffer)-1);
}
} else {
do_add = len!=0;
}
if( do_add || handle->hooks->pfnEof( handle ) ) {
/* create temporary string to ensure that NUL's are preserved ...
* this function wants the length WITH the NUL character!!! */
buffer[len] = 0;
FBSTRING *src = fb_StrAllocTempDescF( buffer, len + 1);
if( readlen==0 ) {
fb_StrAssign( dst, dst_len, src, -1, fillrem );
} else {
fb_StrConcatAssign ( dst, dst_len, src, -1, fillrem );
}
readlen += len;
len = 0;
} else {
++len;
}
if( res!=FB_RTERROR_OK || do_break )
break;
}
if( readlen == 0 ) {
/* del destine string */
if( dst_len == -1 )
fb_StrDelete( (FBSTRING *)dst );
else
*(char *)dst = '\0';
}
break;
case eIM_ReadLine:
/* The read line mode is the most comfortable ... but IMHO it's
* only useful for special devices (like SCRN:) */
{
/* destine is a var-len string? read directly */
if( dst_len == -1 )
{
handle->hooks->pfnReadLine( handle, dst );
}
/* fixed-len or unknown size (ie: pointers)? use a temp var-len */
else
{
FBSTRING str_result = { 0, 0, 0 };
/* read complete line (may include NULs) */
handle->hooks->pfnReadLine( handle, &str_result );
/* add contents of tempporary string to result buffer */
fb_StrAssign( dst, dst_len, (void *)&str_result, -1, fillrem );
/* delete result */
fb_StrDelete( &str_result );
}
}
break;
case eIM_Invalid:
/* the "invalid" mode was already handled above ... so we don't
* need to do anything here ... */
break;
}
FB_UNLOCK();
return fb_ErrorSetNum( FB_RTERROR_OK );
}
FBCALL FB_WCHAR *fb_FileWstrInput( ssize_t chars, int fnum )
{
FB_FILE *handle;
FB_WCHAR *dst;
size_t len;
int res = FB_RTERROR_OK;
fb_DevScrnInit_ReadWstr( );
FB_LOCK();
handle = FB_FILE_TO_HANDLE(fnum);
if( !FB_HANDLE_USED(handle) )
{
FB_UNLOCK();
return NULL;
}
dst = fb_wstr_AllocTemp( chars );
if( dst != NULL )
{
ssize_t read_chars = 0;
if( FB_HANDLE_IS_SCREEN(handle) )
{
while( read_chars != chars )
{
res = fb_FileGetDataEx( handle,
0,
(void *)&dst[read_chars],
chars - read_chars,
&len,
TRUE,
TRUE );
if( res != FB_RTERROR_OK )
break;
read_chars += len;
}
}
else
{
res = fb_FileGetDataEx( handle,
0,
(void *)dst,
chars,
&len,
TRUE,
TRUE );
read_chars = chars;
}
if( res == FB_RTERROR_OK )
{
dst[read_chars] = _LC('\0');
}
else
{
fb_wstr_Del( dst );
dst = NULL;
}
}
else
res = FB_RTERROR_OUTOFMEM;
FB_UNLOCK();
return dst;
}
