Package org.apache.commons.imaging.common

Class BasicCParser

java.lang.Object

org.apache.commons.imaging.common.BasicCParser

public class BasicCParser
extends java.lang.Object

A rudimentary preprocessor and parser for the C programming language. FIXME replace this by a parser generated via ANTLR (if we really need it?!)

Field Summary

Fields

Modifier and Type	Field	Description
private java.io.PushbackInputStream	is

Constructor Summary

Constructors

Constructor	Description
BasicCParser(java.io.ByteArrayInputStream is)

Method Summary

Modifier and Type	Method	Description
private static int	appendHex(int i, java.lang.StringBuilder stringBuilder, java.lang.String string)	Parses the hexadecimal-base escape-sequence found at index i of string.
private static int	appendOct(int i, java.lang.StringBuilder stringBuilder, java.lang.String string)	Parses the octal-base escape-sequence found at index i of string.
java.lang.String	nextToken()
private static int	parseEscape(int i, java.lang.StringBuilder stringBuilder, java.lang.String string)	Parses the i:th escape-char in the input string and appends it to stringBuilder.
static java.io.ByteArrayOutputStream	preprocess(java.io.InputStream is, java.lang.StringBuilder firstComment, java.util.Map<java.lang.String,java.lang.String> defines)
static java.lang.String[]	tokenizeRow(java.lang.String row)
static void	unescapeString(java.lang.StringBuilder stringBuilder, java.lang.String string)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

is

private final java.io.PushbackInputStream is

Constructor Detail

BasicCParser

public BasicCParser(java.io.ByteArrayInputStream is)

Method Detail

appendHex

private static int appendHex(int i,
                             java.lang.StringBuilder stringBuilder,
                             java.lang.String string)
                      throws ImagingException

Parses the hexadecimal-base escape-sequence found at index i of string.

Helper-function for unescapeString().

Parameters:

i - the index of the escape-sequence in the string

stringBuilder - the stringBuilder to append the escape-char to

string - the string whose chars are parsed

Returns:

the new index i

Throws:

ImagingException

Since:

1.0-alpha3

appendOct

private static int appendOct(int i,
                             java.lang.StringBuilder stringBuilder,
                             java.lang.String string)

Parses the octal-base escape-sequence found at index i of string.

Helper-function for unescapeString().

Parameters:

i - the index of the escape-sequence in the string

stringBuilder - the stringBuilder to append the escape-char to

string - the string whose chars are parsed

Returns:

the new index i

Since:

1.0-alpha3

parseEscape

private static int parseEscape(int i,
                               java.lang.StringBuilder stringBuilder,
                               java.lang.String string)
                        throws ImagingException

Parses the i:th escape-char in the input string and appends it to stringBuilder.

Helper-function for unescapeString().

Parameters:

i - the index of the escape-char in the string

stringBuilder - the stringBuilder to append the escape-char to

string - the string whose chars are parsed

Returns:

the new index i

Throws:

ImagingException

Since:

1.0-alpha3

preprocess

public static java.io.ByteArrayOutputStream preprocess(java.io.InputStream is,
                                                       java.lang.StringBuilder firstComment,
                                                       java.util.Map<java.lang.String,java.lang.String> defines)
                                                throws java.io.IOException,
                                                       ImagingException

Throws:

java.io.IOException

ImagingException

tokenizeRow

public static java.lang.String[] tokenizeRow(java.lang.String row)

unescapeString

public static void unescapeString(java.lang.StringBuilder stringBuilder,
                                  java.lang.String string)
                           throws ImagingException

Throws:

ImagingException

nextToken

public java.lang.String nextToken()
                           throws java.io.IOException,
                                  ImagingException

Throws:

java.io.IOException

ImagingException