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Commit 6c193d6f authored by Jesse Beder's avatar Jesse Beder
Browse files

Moved the scalar-related functions to their own file.

parent d076252d
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Showing with 378 additions and 352 deletions
scanner.h
View file @ 6c193d6f
......@@ -45,20 +45,6 @@ namespace YAML
void GetBlockIndentation(int& indent, std::string& breaks);
struct WhitespaceInfo {
WhitespaceInfo();
void SetChompers(char ch);
void AddBlank(char ch);
void AddBreak(const std::string& line);
std::string Join(bool lastline = false);
bool leadingBlanks;
bool fold;
std::string whitespace, leadingBreaks, trailingBreaks;
int chomp, increment;
};
struct SimpleKey {
SimpleKey(int pos_, int line_, int column_, int flowLevel_);
......
scanscalar.cpp 0 → 100644
View file @ 6c193d6f
#include "scanscalar.h"
#include "scanner.h"
#include "exp.h"
#include "exceptions.h"
#include "token.h"
namespace YAML
{
//////////////////////////////////////////////////////////
// WhitespaceInfo
WhitespaceInfo::WhitespaceInfo(): leadingBlanks(false), fold(true), chomp(0), increment(0)
{
}
void WhitespaceInfo::SetChompers(char ch)
{
if(ch == '+')
chomp = 1;
else if(ch == '-')
chomp = -1;
else if(Exp::Digit.Matches(ch)) {
increment = ch - '0';
if(increment == 0)
throw ZeroIndentationInBlockScalar();
}
}
void WhitespaceInfo::AddBlank(char ch)
{
if(!leadingBlanks)
whitespace += ch;
}
void WhitespaceInfo::AddBreak(const std::string& line)
{
// where to store this character?
if(!leadingBlanks) {
leadingBlanks = true;
whitespace = "";
leadingBreaks += line;
} else
trailingBreaks += line;
}
std::string WhitespaceInfo::Join(bool lastLine)
{
std::string ret;
if(leadingBlanks) {
// fold line break?
if(fold && Exp::Break.Matches(leadingBreaks) && trailingBreaks.empty() && !lastLine)
ret = " ";
else if(!lastLine || chomp != -1)
ret = leadingBreaks;
if(!lastLine || chomp == 1)
ret += trailingBreaks;
leadingBlanks = false;
leadingBreaks = "";
trailingBreaks = "";
} else if(!whitespace.empty()) {
ret = whitespace;
whitespace = "";
}
return ret;
}
// PlainScalarToken
// . We scan these in passes of two steps each: First, grab all non-whitespace
// characters we can, and then grab all whitespace characters we can.
// . This has the benefit of letting us handle leading whitespace (which is chomped)
// and in-line whitespace (which is kept) separately.
template <> PlainScalarToken *Scanner::ScanToken(PlainScalarToken *pToken)
{
// insert a potential simple key
if(m_simpleKeyAllowed)
InsertSimpleKey();
m_simpleKeyAllowed = false;
// now eat and store the scalar
std::string scalar;
WhitespaceInfo info;
while(INPUT) {
// doc start/end tokens
if(IsDocumentStart() || IsDocumentEnd())
break;
// comment
if(Exp::Comment.Matches(INPUT))
break;
// first eat non-blanks
while(INPUT && !Exp::BlankOrBreak.Matches(INPUT)) {
// illegal colon in flow context
if(m_flowLevel > 0 && Exp::IllegalColonInScalar.Matches(INPUT))
throw IllegalScalar();
// characters that might end the scalar
if(m_flowLevel > 0 && Exp::EndScalarInFlow.Matches(INPUT))
break;
if(m_flowLevel == 0 && Exp::EndScalar.Matches(INPUT))
break;
// finally, read the character!
scalar += GetChar();
}
// did we hit a non-blank character that ended us?
if(!Exp::BlankOrBreak.Matches(INPUT))
break;
// now eat blanks
while(INPUT && Exp::BlankOrBreak.Matches(INPUT)) {
if(Exp::Blank.Matches(INPUT)) {
// can't use tabs as indentation! only spaces!
if(INPUT.peek() == '\t' && info.leadingBlanks && m_column <= m_indents.top())
throw IllegalTabInScalar();
info.AddBlank(GetChar());
} else {
// we know it's a line break; see how many characters to read
int n = Exp::Break.Match(INPUT);
std::string line = GetChar(n);
info.AddBreak(line);
// and we can't continue a simple key to the next line
ValidateSimpleKey();
}
}
// break if we're below the indentation level
if(m_flowLevel == 0 && m_column <= m_indents.top())
break;
// finally join whitespace
scalar += info.Join();
}
// now modify our token
pToken->value = scalar;
if(info.leadingBlanks)
m_simpleKeyAllowed = true;
return pToken;
}
// QuotedScalarToken
template <> QuotedScalarToken *Scanner::ScanToken(QuotedScalarToken *pToken)
{
// insert a potential simple key
if(m_simpleKeyAllowed)
InsertSimpleKey();
m_simpleKeyAllowed = false;
// eat single or double quote
char quote = GetChar();
pToken->single = (quote == '\'');
// now eat and store the scalar
std::string scalar;
WhitespaceInfo info;
while(INPUT) {
if(IsDocumentStart() || IsDocumentEnd())
throw DocIndicatorInQuote();
if(INPUT.peek() == EOF)
throw EOFInQuote();
// first eat non-blanks
while(INPUT && !Exp::BlankOrBreak.Matches(INPUT)) {
// escaped single quote?
if(pToken->single && Exp::EscSingleQuote.Matches(INPUT)) {
int n = Exp::EscSingleQuote.Match(INPUT);
scalar += GetChar(n);
continue;
}
// is the quote ending?
if(INPUT.peek() == quote)
break;
// escaped newline?
if(Exp::EscBreak.Matches(INPUT))
break;
// other escape sequence
if(INPUT.peek() == '\\') {
int length = 0;
scalar += Exp::Escape(INPUT, length);
m_column += length;
continue;
}
// and finally, just add the damn character
scalar += GetChar();
}
// is the quote ending?
if(INPUT.peek() == quote) {
// eat and go
GetChar();
break;
}
// now we eat blanks
while(Exp::BlankOrBreak.Matches(INPUT)) {
if(Exp::Blank.Matches(INPUT)) {
info.AddBlank(GetChar());
} else {
// we know it's a line break; see how many characters to read
int n = Exp::Break.Match(INPUT);
std::string line = GetChar(n);
info.AddBreak(line);
// and we can't continue a simple key to the next line
ValidateSimpleKey();
}
}
// and finally join the whitespace
scalar += info.Join();
}
pToken->value = scalar;
return pToken;
}
// BlockScalarToken
template <> BlockScalarToken *Scanner::ScanToken(BlockScalarToken *pToken)
{
// simple keys always ok after block scalars (since we're gonna start a new line anyways)
m_simpleKeyAllowed = true;
WhitespaceInfo info;
// eat block indicator ('|' or '>')
char indicator = GetChar();
info.fold = (indicator == Keys::FoldedScalar);
// eat chomping/indentation indicators
int n = Exp::Chomp.Match(INPUT);
for(int i=0;i<n;i++)
info.SetChompers(GetChar());
// first eat whitespace
while(Exp::Blank.Matches(INPUT))
Eat(1);
// and comments to the end of the line
if(Exp::Comment.Matches(INPUT))
while(INPUT && !Exp::Break.Matches(INPUT))
Eat(1);
// if it's not a line break, then we ran into a bad character inline
if(INPUT && !Exp::Break.Matches(INPUT))
throw UnexpectedCharacterInBlockScalar();
// and eat that baby
EatLineBreak();
// set the initial indentation
int indent = info.increment;
if(info.increment && m_indents.top() >= 0)
indent += m_indents.top();
// finally, grab that scalar
std::string scalar;
while(INPUT) {
// initialize indentation
GetBlockIndentation(indent, info.trailingBreaks);
// are we done with this guy (i.e. at a lower indentation?)
if(m_column != indent)
break;
bool trailingBlank = Exp::Blank.Matches(INPUT);
scalar += info.Join();
bool leadingBlank = Exp::Blank.Matches(INPUT);
// now eat and save the line
while(INPUT.peek() != EOF && !Exp::Break.Matches(INPUT))
scalar += GetChar();
// we know it's a line break; see how many characters to read
int n = Exp::Break.Match(INPUT);
std::string line = GetChar(n);
info.AddBreak(line);
}
// one last whitespace join (with chompers this time)
scalar += info.Join(true);
// finally set the scalar
pToken->value = scalar;
return pToken;
}
// GetBlockIndentation
// . Helper to scanning a block scalar.
// . Eats leading *indentation* zeros (i.e., those that come before 'indent'),
// and updates 'indent' (if it hasn't been set yet).
void Scanner::GetBlockIndentation(int& indent, std::string& breaks)
{
int maxIndent = 0;
while(1) {
// eat as many indentation spaces as we can
while((indent == 0 || m_column < indent) && INPUT.peek() == ' ')
Eat(1);
if(m_column > maxIndent)
maxIndent = m_column;
// do we need more indentation, but we've got a tab?
if((indent == 0 || m_column < indent) && INPUT.peek() == '\t')
throw IllegalTabInScalar(); // TODO: are literal scalar lines allowed to have tabs here?
// is this a non-empty line?
if(!Exp::Break.Matches(INPUT))
break;
// otherwise, eat the line break and move on
int n = Exp::Break.Match(INPUT);
breaks += GetChar(n);
}
// finally, set the indentation
if(indent == 0) {
indent = maxIndent;
if(indent < m_indents.top() + 1)
indent = m_indents.top() + 1;
if(indent < 1)
indent = 1;
}
}
}
scanscalar.h 0 → 100644
View file @ 6c193d6f
#pragma once
#include <string>
namespace YAML
{
struct WhitespaceInfo {
WhitespaceInfo();
void SetChompers(char ch);
void AddBlank(char ch);
void AddBreak(const std::string& line);
std::string Join(bool lastline = false);
bool leadingBlanks;
bool fold;
std::string whitespace, leadingBreaks, trailingBreaks;
int chomp, increment;
};
}
scantoken.cpp
View file @ 6c193d6f
......@@ -220,339 +220,4 @@ namespace YAML
pToken->value = tag;
return pToken;
}
// PlainScalarToken
// . We scan these in passes of two steps each: First, grab all non-whitespace
// characters we can, and then grab all whitespace characters we can.
// . This has the benefit of letting us handle leading whitespace (which is chomped)
// and in-line whitespace (which is kept) separately.
template <> PlainScalarToken *Scanner::ScanToken(PlainScalarToken *pToken)
{
// insert a potential simple key
if(m_simpleKeyAllowed)
InsertSimpleKey();
m_simpleKeyAllowed = false;
// now eat and store the scalar
std::string scalar;
WhitespaceInfo info;
while(INPUT) {
// doc start/end tokens
if(IsDocumentStart() || IsDocumentEnd())
break;
// comment
if(Exp::Comment.Matches(INPUT))
break;
// first eat non-blanks
while(INPUT && !Exp::BlankOrBreak.Matches(INPUT)) {
// illegal colon in flow context
if(m_flowLevel > 0 && Exp::IllegalColonInScalar.Matches(INPUT))
throw IllegalScalar();
// characters that might end the scalar
if(m_flowLevel > 0 && Exp::EndScalarInFlow.Matches(INPUT))
break;
if(m_flowLevel == 0 && Exp::EndScalar.Matches(INPUT))
break;
// finally, read the character!
scalar += GetChar();
}
// did we hit a non-blank character that ended us?
if(!Exp::BlankOrBreak.Matches(INPUT))
break;
// now eat blanks
while(INPUT && Exp::BlankOrBreak.Matches(INPUT)) {
if(Exp::Blank.Matches(INPUT)) {
// can't use tabs as indentation! only spaces!
if(INPUT.peek() == '\t' && info.leadingBlanks && m_column <= m_indents.top())
throw IllegalTabInScalar();
info.AddBlank(GetChar());
} else {
// we know it's a line break; see how many characters to read
int n = Exp::Break.Match(INPUT);
std::string line = GetChar(n);
info.AddBreak(line);
// and we can't continue a simple key to the next line
ValidateSimpleKey();
}
}
// break if we're below the indentation level
if(m_flowLevel == 0 && m_column <= m_indents.top())
break;
// finally join whitespace
scalar += info.Join();
}
// now modify our token
pToken->value = scalar;
if(info.leadingBlanks)
m_simpleKeyAllowed = true;
return pToken;
}
// QuotedScalarToken
template <> QuotedScalarToken *Scanner::ScanToken(QuotedScalarToken *pToken)
{
// insert a potential simple key
if(m_simpleKeyAllowed)
InsertSimpleKey();
m_simpleKeyAllowed = false;
// eat single or double quote
char quote = GetChar();
bool single = (quote == '\'');
// now eat and store the scalar
std::string scalar;
WhitespaceInfo info;
while(INPUT) {
if(IsDocumentStart() || IsDocumentEnd())
throw DocIndicatorInQuote();
if(INPUT.peek() == EOF)
throw EOFInQuote();
// first eat non-blanks
while(INPUT && !Exp::BlankOrBreak.Matches(INPUT)) {
// escaped single quote?
if(single && Exp::EscSingleQuote.Matches(INPUT)) {
int n = Exp::EscSingleQuote.Match(INPUT);
scalar += GetChar(n);
continue;
}
// is the quote ending?
if(INPUT.peek() == (single ? '\'' : '\"'))
break;
// escaped newline?
if(Exp::EscBreak.Matches(INPUT))
break;
// other escape sequence
if(INPUT.peek() == '\\') {
int length = 0;
scalar += Exp::Escape(INPUT, length);
m_column += length;
continue;
}
// and finally, just add the damn character
scalar += GetChar();
}
// is the quote ending?
if(INPUT.peek() == (single ? '\'' : '\"')) {
// eat and go
GetChar();
break;
}
// now we eat blanks
while(Exp::BlankOrBreak.Matches(INPUT)) {
if(Exp::Blank.Matches(INPUT)) {
info.AddBlank(GetChar());
} else {
// we know it's a line break; see how many characters to read
int n = Exp::Break.Match(INPUT);
std::string line = GetChar(n);
info.AddBreak(line);
// and we can't continue a simple key to the next line
ValidateSimpleKey();
}
}
// and finally join the whitespace
scalar += info.Join();
}
pToken->value = scalar;
return pToken;
}
// BlockScalarToken
template <> BlockScalarToken *Scanner::ScanToken(BlockScalarToken *pToken)
{
// simple keys always ok after block scalars (since we're gonna start a new line anyways)
m_simpleKeyAllowed = true;
WhitespaceInfo info;
// eat block indicator ('|' or '>')
char indicator = GetChar();
info.fold = (indicator == Keys::FoldedScalar);
// eat chomping/indentation indicators
int n = Exp::Chomp.Match(INPUT);
for(int i=0;i<n;i++)
info.SetChompers(GetChar());
// first eat whitespace
while(Exp::Blank.Matches(INPUT))
Eat(1);
// and comments to the end of the line
if(Exp::Comment.Matches(INPUT))
while(INPUT && !Exp::Break.Matches(INPUT))
Eat(1);
// if it's not a line break, then we ran into a bad character inline
if(INPUT && !Exp::Break.Matches(INPUT))
throw UnexpectedCharacterInBlockScalar();
// and eat that baby
EatLineBreak();
// set the initial indentation
int indent = info.increment;
if(info.increment && m_indents.top() >= 0)
indent += m_indents.top();
// finally, grab that scalar
std::string scalar;
while(INPUT) {
// initialize indentation
GetBlockIndentation(indent, info.trailingBreaks);
// are we done with this guy (i.e. at a lower indentation?)
if(m_column != indent)
break;
bool trailingBlank = Exp::Blank.Matches(INPUT);
scalar += info.Join();
bool leadingBlank = Exp::Blank.Matches(INPUT);
// now eat and save the line
while(INPUT.peek() != EOF && !Exp::Break.Matches(INPUT))
scalar += GetChar();
// we know it's a line break; see how many characters to read
int n = Exp::Break.Match(INPUT);
std::string line = GetChar(n);
info.AddBreak(line);
}
// one last whitespace join (with chompers this time)
scalar += info.Join(true);
// finally set the scalar
pToken->value = scalar;
return pToken;
}
// GetBlockIndentation
// . Helper to scanning a block scalar.
// . Eats leading *indentation* zeros (i.e., those that come before 'indent'),
// and updates 'indent' (if it hasn't been set yet).
void Scanner::GetBlockIndentation(int& indent, std::string& breaks)
{
int maxIndent = 0;
while(1) {
// eat as many indentation spaces as we can
while((indent == 0 || m_column < indent) && INPUT.peek() == ' ')
Eat(1);
if(m_column > maxIndent)
maxIndent = m_column;
// do we need more indentation, but we've got a tab?
if((indent == 0 || m_column < indent) && INPUT.peek() == '\t')
throw IllegalTabInScalar(); // TODO: are literal scalar lines allowed to have tabs here?
// is this a non-empty line?
if(!Exp::Break.Matches(INPUT))
break;
// otherwise, eat the line break and move on
int n = Exp::Break.Match(INPUT);
breaks += GetChar(n);
}
// finally, set the indentation
if(indent == 0) {
indent = maxIndent;
if(indent < m_indents.top() + 1)
indent = m_indents.top() + 1;
if(indent < 1)
indent = 1;
}
}
//////////////////////////////////////////////////////////
// WhitespaceInfo stuff
Scanner::WhitespaceInfo::WhitespaceInfo(): leadingBlanks(false), fold(true), chomp(0), increment(0)
{
}
void Scanner::WhitespaceInfo::SetChompers(char ch)
{
if(ch == '+')
chomp = 1;
else if(ch == '-')
chomp = -1;
else if(Exp::Digit.Matches(ch)) {
increment = ch - '0';
if(increment == 0)
throw ZeroIndentationInBlockScalar();
}
}
void Scanner::WhitespaceInfo::AddBlank(char ch)
{
if(!leadingBlanks)
whitespace += ch;
}
void Scanner::WhitespaceInfo::AddBreak(const std::string& line)
{
// where to store this character?
if(!leadingBlanks) {
leadingBlanks = true;
whitespace = "";
leadingBreaks += line;
} else
trailingBreaks += line;
}
std::string Scanner::WhitespaceInfo::Join(bool lastLine)
{
std::string ret;
if(leadingBlanks) {
// fold line break?
if(fold && Exp::Break.Matches(leadingBreaks) && trailingBreaks.empty() && !lastLine)
ret = " ";
else if(!lastLine || chomp != -1)
ret = leadingBreaks;
if(!lastLine || chomp == 1)
ret += trailingBreaks;
leadingBlanks = false;
leadingBreaks = "";
trailingBreaks = "";
} else if(!whitespace.empty()) {
ret = whitespace;
whitespace = "";
}
return ret;
}
}
test.yaml
View file @ 6c193d6f
......@@ -3,10 +3,10 @@ people:
name: Jesse
age: 23
- &dab
name: Daniel
name: 'Daniel'
age: 25
- &ncb
name: Naftali
name: "Naftali"
age: 21
students:
- *jsb
......
token.h
View file @ 6c193d6f
......@@ -44,6 +44,10 @@ namespace YAML
};
struct PlainScalarToken: public ScalarToken {};
struct QuotedScalarToken: public ScalarToken {};
struct QuotedScalarToken: public ScalarToken {
bool single;
virtual void Write(std::ostream& out) const { out << (single ? '\'' : '\"') << value << (single ? '\'' : '\"'); }
};
struct BlockScalarToken: public ScalarToken {};
}
yaml-reader.vcproj
View file @ 6c193d6f
......@@ -201,6 +201,10 @@
RelativePath=".\scanner.cpp"
>
</File>
<File
RelativePath=".\scanscalar.cpp"
>
</File>
<File
RelativePath=".\scantoken.cpp"
>
......@@ -259,6 +263,10 @@
RelativePath=".\scanner.h"
>
</File>
<File
RelativePath=".\scanscalar.h"
>
</File>
<File
RelativePath=".\sequence.h"
>
......
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