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Bug 564369 - streamline TokenStream::getChar(), part 2. r=cdleary.

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--HG--
extra : rebase_source : 4148cba1faa670ee8a5147b78a339bf676d5fcae
This commit is contained in:
Nicholas Nethercote 2010-05-12 21:39:59 -07:00
parent c33fb75973
commit 6abfef34e4
1 changed files with 16 additions and 29 deletions
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45
js/src/jsscan.cpp
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@ -400,43 +400,30 @@ TokenStream::getChar()
olen = len;
/*
* Make sure linebuf contains \n for EOL (don't do this in
* Normalize all EOL sequences to \n in linebuf (don't do this in
* userbuf because the user's string might be readonly).
*/
if (nl < userbuf.limit) {
if (*nl == '\r') {
if (linebuf.base[len-1] == '\r') {
/*
* Does the line segment end in \r? We must check
* for a \n at the front of the next segment before
* storing a \n into linebuf. This case matters
* only when we're reading from a file.
*/
if (nl + 1 == userbuf.limit && file) {
len--;
flags |= TSF_CRFLAG; /* clear NLFLAG? */
if (len == 0) {
/*
* This can happen when a segment ends in
* \r\r. Start over. ptr == limit in this
* case, so we'll fall into buffer-filling
* code.
*/
return getChar();
}
} else {
linebuf.base[len-1] = '\n';
}
}
// If nl points to a \r that means it mustn't be followed
// by a \n, in which case \r must have been the last char
// copied. Replace it with \n.
JS_ASSERT(linebuf.base[len-1] == '\r');
linebuf.base[len-1] = '\n';
} else if (*nl == '\n') {
if (nl > userbuf.base &&
nl[-1] == '\r' &&
linebuf.base[len-2] == '\r') {
if (nl > userbuf.base && nl[-1] == '\r') {
// If nl points to a \n that's preceded by a \r, we
// overwrite the \r with \n and pull len back by one
// so the \n pointed to by nl ends up beyond
// linebuf.limit.
JS_ASSERT(linebuf.base[len-2] == '\r' &&
linebuf.base[len-1] == '\n');
linebuf.base[len-2] = '\n';
len--;
JS_ASSERT(linebuf.base[len] == '\n');
linebuf.base[len-1] = '\n';
}
} else if (*nl == LINE_SEPARATOR || *nl == PARA_SEPARATOR) {
JS_ASSERT(linebuf.base[len-1] == LINE_SEPARATOR ||
linebuf.base[len-1] == PARA_SEPARATOR);
linebuf.base[len-1] = '\n';
}
}