faudes::TokenReader Class Reference
#include <tokenreader.h>
List of all members.
Detailed Description
A
TokenReader reads sequential tokens from a file or string.
It can get or peek the next token and it will track line numbers for informative diagnosis output.
The class also implements nested sections. That is, you may search for a (sub-)section within the current section and, hence, implement file formats that do not insist in a particular ordering of the sections (e.g. a Generator consists of states, transitions and events, no matter in which order).
Convenience functions are provided to read a token of a particular type and throws faudes::Exception on token mismatch. You may catch the exception as follows:
try {
some tokenreader operations
}
catch (faudes::Exception& ex) {
cerr << "Error reading file (details: " << ex.What() << ")" << endl;
}
Note that in addition to the documented execeptions all
TokenReader functions do pass on
faudes ios errors from the
Token class.
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Public Types |
enum | Mode { File,
Stdin,
String
} |
| Mode of operation: read from file, stdin or string. More...
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Public Member Functions |
| TokenReader (Mode mode, const std::string &rInString="") |
| TokenReader constructor.
|
| TokenReader (const std::string &rFilename) |
| Creates a TokenReader for reading complete file.
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| ~TokenReader (void) |
| Destruct.
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bool | good (void) const |
| Get state of TokenReader stream.
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std::string | FileName (void) const |
| Get the filename.
|
Mode | SourceMode (void) const |
| Get file mode.
|
bool | Peek (Token &token) |
| Peek next token.
|
bool | Get (Token &token) |
| Get next token.
|
void | Rewind (void) |
| Rewind stream (must be a seekable stream).
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void | ReadBegin (const std::string &rLabel) |
| Open a section by specified label.
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void | ReadEnd (const std::string &rLabel) |
| Close the current section by matching the previous ReadBegin().
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void | SeekBegin (const std::string &rLabel) |
| Open a section by specified label.
|
void | SeekEnd (const std::string &rLabel) |
| Close the current section by matching the previous SeekBegin().
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bool | Eos (const std::string &rLabel) |
| Peek a token and check whether it ends the specified section.
|
long int | ReadInteger (void) |
| Read integer token.
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double | ReadFloat (void) |
| Read float token.
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const std::string & | ReadString (void) |
| Read string token.
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const std::string & | ReadOption (void) |
| Read option token.
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const std::string & | ReadBinary (void) |
| Read binary token.
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bool | operator>> (Token &token) |
| Operator for get.
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int | Line (void) const |
| Return number of lines read.
|
std::string | FileLine (void) const |
| Return "filename:line".
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Private Attributes |
Mode | mMode |
| input mode
|
std::istream * | mpStream |
| istream object pointer
|
std::ifstream | mFStream |
| actual stream object, file input
|
std::istringstream * | mpSStream |
| actual stream object on heap, string input
|
std::string | mFileName |
| Filename.
|
int | mLineCount |
| Line counter.
|
long int | mFilePos |
| file position
|
int | mLevel |
| Level (of nested sections).
|
std::vector< long int > | mLevelPos |
| file positions of sections
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std::vector< long int > | mLevelLine |
| file line of sections
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std::vector< int > | mSeekLevel |
| level of recent seek
|
std::string | mLastString |
| recent string buffer
|
bool | mHasPeekToken |
| validity of peek buffer
|
Token | mPeekToken |
| peek buffer
|
Member Enumeration Documentation
Mode of operation: read from file, stdin or string.
- Enumerator:
-
Constructor & Destructor Documentation
faudes::TokenReader::TokenReader |
( |
Mode |
mode, |
|
|
const std::string & |
rInString = "" | |
|
) |
| | |
TokenReader constructor.
- Parameters:
-
| mode | select source: File, Stdin or String |
| rInString | string to read from or filename |
- Exceptions:
-
faudes::TokenReader::TokenReader |
( |
const std::string & |
rFilename |
) |
|
Creates a TokenReader for reading complete file.
- Parameters:
-
- Exceptions:
-
faudes::TokenReader::~TokenReader |
( |
void |
|
) |
|
Member Function Documentation
bool faudes::TokenReader::good |
( |
void |
|
) |
const |
Get state of TokenReader stream.
- Returns:
- std::stream.good()
std::string faudes::TokenReader::FileName |
( |
void |
|
) |
const |
Get the filename.
Return dummy values for console or string mode.
- Returns:
- Filename
Mode faudes::TokenReader::SourceMode |
( |
void |
|
) |
const [inline] |
Get file mode.
- Returns:
- Mode
bool faudes::TokenReader::Peek |
( |
Token & |
token |
) |
|
Peek next token.
False indicates eof.
- Parameters:
-
- Exceptions:
-
- Returns:
- True for a valid token, false for eof
bool faudes::TokenReader::Get |
( |
Token & |
token |
) |
|
Get next token.
False indicates eof.
- Parameters:
-
- Exceptions:
-
- Returns:
- True for a valid token, false for eof
void faudes::TokenReader::Rewind |
( |
void |
|
) |
|
Rewind stream (must be a seekable stream).
- Exceptions:
-
void faudes::TokenReader::ReadBegin |
( |
const std::string & |
rLabel |
) |
|
Open a section by specified label.
This function searches for the section on this level, it skips any sections on levels below this level, and it will wrap to the begin of the current section. In the case of success, the matching begin token is the last token read. After processing the section, a matching ReadEnd(label) must be called.
- Parameters:
-
| rLabel | Token label to specify section |
- Exceptions:
-
| Exception | Section begin label not found (id 51) |
void faudes::TokenReader::ReadEnd |
( |
const std::string & |
rLabel |
) |
|
Close the current section by matching the previous ReadBegin().
Reads all tokens up to and including end of current section.
- Parameters:
-
| rLabel | Token label to specify section |
- Exceptions:
-
| Exception | Section end label not found (id 51) |
void faudes::TokenReader::SeekBegin |
( |
const std::string & |
rLabel |
) |
|
Open a section by specified label.
This function searches for the section on this level and any descending level. However, this funtion will not rewind to the beginning of the current section (this may change in a future revision). In the case of success, the matching begin token is the last token read. After processing the section, a matching SeekEnd(label) must be called.
- Parameters:
-
| rLabel | Label to specify section |
- Exceptions:
-
void faudes::TokenReader::SeekEnd |
( |
const std::string & |
rLabel |
) |
|
Close the current section by matching the previous SeekBegin().
Reads all tokens up to the level when SeekBegin() was called.
- Parameters:
-
| rLabel | Token label to specify section |
- Exceptions:
-
| Exception | Section end label not found (id 51) Previous level not found/ unmachted call (id 52) |
bool faudes::TokenReader::Eos |
( |
const std::string & |
rLabel |
) |
|
Peek a token and check whether it ends the specified section.
This function is meant for scanning a section with a while- construct.
- Parameters:
-
| rLabel | Token label to specify section |
- Exceptions:
-
- Returns:
- True at end of section
long int faudes::TokenReader::ReadInteger |
( |
void |
|
) |
|
Read integer token.
- Exceptions:
-
- Returns:
- value of index token
double faudes::TokenReader::ReadFloat |
( |
void |
|
) |
|
Read float token.
- Exceptions:
-
- Returns:
- value of index token
const std::string & faudes::TokenReader::ReadString |
( |
void |
|
) |
|
Read string token.
- Exceptions:
-
- Returns:
- value of name token
const std::string & faudes::TokenReader::ReadOption |
( |
void |
|
) |
|
Read option token.
- Exceptions:
-
- Returns:
- value of name token
const std::string & faudes::TokenReader::ReadBinary |
( |
void |
|
) |
|
Read binary token.
You can access the binary array via StringValue();
- Returns:
- Binary data as std::string
- Exceptions:
-
bool faudes::TokenReader::operator>> |
( |
Token & |
token |
) |
[inline] |
int faudes::TokenReader::Line |
( |
void |
|
) |
const |
Return number of lines read.
- Returns:
- Number of lines read
std::string faudes::TokenReader::FileLine |
( |
void |
|
) |
const |
Member Data Documentation
actual stream object, file input
actual stream object on heap, string input
Level (of nested sections).
file positions of sections
The documentation for this class was generated from the following files: