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Using peekByte() in heavily used Scanner methods.

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This commit is contained in:
Ferdinand Majerech 2014-08-04 02:22:09 +02:00
parent 8e63f62d7e
commit 20048ea995
1 changed files with 26 additions and 15 deletions
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41
source/dyaml/scanner.d
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@ -731,7 +731,7 @@ final class Scanner
///Check if the next token is DIRECTIVE: ^ '%' ... ///Check if the next token is DIRECTIVE: ^ '%' ...
bool checkDirective() @safe pure nothrow @nogc bool checkDirective() @safe pure nothrow @nogc
{ {
return reader_.peek() == '%' && reader_.column == 0; return reader_.peekByte() == '%' && reader_.column == 0;
} }
/// Check if the next token is DOCUMENT-START: ^ '---' (' '|'\n') /// Check if the next token is DOCUMENT-START: ^ '---' (' '|'\n')
@ -739,8 +739,8 @@ final class Scanner
{ {
// Check one char first, then all 3, to prevent reading outside the buffer. // Check one char first, then all 3, to prevent reading outside the buffer.
return reader_.column == 0 && return reader_.column == 0 &&
reader_.peek() == '-' && reader_.peekByte() == '-' &&
reader_.prefix(3) == "---" && reader_.prefix(3) == "---" &&
" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(3)); " \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(3));
} }
@ -749,8 +749,8 @@ final class Scanner
{ {
// Check one char first, then all 3, to prevent reading outside the buffer. // Check one char first, then all 3, to prevent reading outside the buffer.
return reader_.column == 0 && return reader_.column == 0 &&
reader_.peek() == '.' && reader_.peekByte() == '.' &&
reader_.prefix(3) == "..." && reader_.prefix(3) == "..." &&
" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(3)); " \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(3));
} }
@ -806,7 +806,7 @@ final class Scanner
/// Move to the next non-space character. /// Move to the next non-space character.
void findNextNonSpace() @safe pure nothrow @nogc void findNextNonSpace() @safe pure nothrow @nogc
{ {
while(reader_.peek() == ' ') { reader_.forward(); } while(reader_.peekByte() == ' ') { reader_.forward(); }
} }
/// Scan a string of alphanumeric or "-_" characters. /// Scan a string of alphanumeric or "-_" characters.
@ -883,7 +883,7 @@ final class Scanner
{ {
findNextNonSpace(); findNextNonSpace();
if(reader_.peek() == '#') { scanToNextBreak(); } if(reader_.peekByte() == '#') { scanToNextBreak(); }
if(scanLineBreak() != '\0') if(scanLineBreak() != '\0')
{ {
if(flowLevel_ == 0) { allowSimpleKey_ = true; } if(flowLevel_ == 0) { allowSimpleKey_ = true; }
@ -1728,7 +1728,7 @@ final class Scanner
alias Transaction = SliceBuilder.Transaction; alias Transaction = SliceBuilder.Transaction;
Transaction spacesTransaction; Transaction spacesTransaction;
// Stop at a comment. // Stop at a comment.
while(reader_.peek() != '#') while(reader_.peekByte() != '#')
{ {
// Scan the entire plain scalar. // Scan the entire plain scalar.
uint length = 0; uint length = 0;
@ -1796,7 +1796,7 @@ final class Scanner
// Get as many plain spaces as there are. // Get as many plain spaces as there are.
size_t length = 0; size_t length = 0;
while(reader_.peek(length) == ' ') { ++length; } while(reader_.peekByte(length) == ' ') { ++length; }
char[] whitespaces = reader_.get(length); char[] whitespaces = reader_.get(length);
dchar c = reader_.peek(); dchar c = reader_.peek();
@ -1827,7 +1827,7 @@ final class Scanner
if(lineBreak != '\n') { reader_.sliceBuilder.write(lineBreak); } if(lineBreak != '\n') { reader_.sliceBuilder.write(lineBreak); }
while(" \n\r\u0085\u2028\u2029"d.canFind(reader_.peek())) while(" \n\r\u0085\u2028\u2029"d.canFind(reader_.peek()))
{ {
if(reader_.peek() == ' ') { reader_.forward(); } if(reader_.peekByte() == ' ') { reader_.forward(); }
else else
{ {
const lBreak = scanLineBreak(); const lBreak = scanLineBreak();
@ -2028,12 +2028,23 @@ final class Scanner
/// no break : '\0' /// no break : '\0'
dchar scanLineBreak() @safe pure nothrow @nogc dchar scanLineBreak() @safe pure nothrow @nogc
{ {
const c = reader_.peek(); // Fast path for ASCII line breaks.
const b = reader_.peekByte();
if(c == '\n' || c == '\r' || c == '\u0085') if(b < 0x80)
{ {
if(reader_.prefix(2) == "\r\n") { reader_.forward(2); } if(b == '\n' || b == '\r')
else { reader_.forward(); } {
if(reader_.prefix(2) == "\r\n") { reader_.forward(2); }
else { reader_.forward(); }
return '\n';
}
return '\0';
}
const c = reader_.peek();
if(c == '\x85')
{
reader_.forward();
return '\n'; return '\n';
} }
if(c == '\u2028' || c == '\u2029') if(c == '\u2028' || c == '\u2029')