docs/latex/wx/txtstrm.tex

   1 % ----------------------------------------------------------------------------
   2 % wxTextInputStream
   3 % ----------------------------------------------------------------------------
   4 \section{\class{wxTextInputStream}}\label{wxtextinputstream}
   5
   6 This class provides functions that read text datas using an input stream.
   7 So, you can read {\it text} floats, integers.
   8
   9 The wxTextInputStream correctly reads text files (or streams) in DOS, Macintosh
  10 and Unix formats and reports a single newline char as a line ending.
  11
  12 Operator >> is overloaded and you can use this class like a standard C++ iostream.
  13 Note, however, that the arguments are the fixed size types wxUint32, wxInt32 etc
  14 and on a typical 32-bit computer, none of these match to the "long" type (wxInt32
  15 is defined as int on 32-bit architectures) so that you cannot use long. To avoid
  16 problems (here and elsewhere), make use of wxInt32, wxUint32 and similar types.
  17
  18 If you're scanning through a file using wxTextInputStream, you should check for EOF {\bf before}
  19 reading the next item (word / number), because otherwise the last item may get lost.
  20 You should however be prepared to receive an empty item (empty string / zero number) at the
  21 end of file, especially on Windows systems. This is unavoidable because most (but not all) files end
  22 with whitespace (i.e. usually a newline).
  23
  24 For example:
  25
  26 \begin{verbatim}
  27   wxFileInputStream input( "mytext.txt" );
  28   wxTextInputStream text( input );
  29   wxUint8 i1;
  30   float f2;
  31   wxString line;
  32
  33   text >> i1;       // read a 8 bit integer.
  34   text >> i1 >> f2; // read a 8 bit integer followed by float.
  35   text >> line;     // read a text line
  36 \end{verbatim}
  37
  38 \wxheading{Include files}
  39
  40 <wx/txtstrm.h>
  41
  42 \latexignore{\rtfignore{\wxheading{Members}}}
  43
  44 \membersection{wxTextInputStream::wxTextInputStream}\label{wxtextinputstreamctor}
  45
  46 \func{}{wxTextInputStream}{\param{wxInputStream\&}{ stream}, \param{const wxString\&}{ sep=" $\backslash$t"},
  47   \param{wxMBConv\&}{ conv = wxConvUTF8} }
  48
  49 Constructs a text stream associated to the given input stream.
  50
  51 \wxheading{Parameters}
  52
  53 \docparam{stream}{The underlying input stream.}
  54
  55 \docparam{sep}{The initial string separator characters.}
  56
  57 \docparam{conv}{{\it In Unicode build only:} The encoding converter used to convert the bytes in the
  58   underlying input stream to characters.}
  59
  60 \membersection{wxTextInputStream::\destruct{wxTextInputStream}}\label{wxtextinputstreamdtor}
  61
  62 \func{}{\destruct{wxTextInputStream}}{\void}
  63
  64 Destroys the wxTextInputStream object.
  65
  66 \membersection{wxTextInputStream::Read8}\label{wxtextinputstreamread8}
  67
  68 \func{wxUint8}{Read8}{\param{int}{ base = 10}}
  69
  70 Reads a single unsigned byte from the stream, given in base {\it base}.
  71
  72 The value of {\it base} must be comprised between $2$ and $36$, inclusive, or
  73 be a special value $0$ which means that the usual rules of {\tt C} numbers are
  74 applied: if the number starts with {\tt 0x} it is considered to be in base
  75 $16$, if it starts with {\tt 0} - in base $8$ and in base $10$ otherwise. Note
  76 that you may not want to specify the base $0$ if you are parsing the numbers
  77 which may have leading zeroes as they can yield unexpected (to the user not
  78 familiar with C) results.
  79
  80 \membersection{wxTextInputStream::Read8S}\label{wxtextinputstreamread8s}
  81
  82 \func{wxInt8}{Read8S}{\param{int}{ base = 10}}
  83
  84 Reads a single signed byte from the stream.
  85
  86 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
  87 description of the {\it base} parameter.
  88
  89 \membersection{wxTextInputStream::Read16}\label{wxtextinputstreamread16}
  90
  91 \func{wxUint16}{Read16}{\param{int}{ base = 10}}
  92
  93 Reads a unsigned 16 bit integer from the stream.
  94
  95 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
  96 description of the {\it base} parameter.
  97
  98 \membersection{wxTextInputStream::Read16S}\label{wxtextinputstreamread16s}
  99
 100 \func{wxInt16}{Read16S}{\param{int}{ base = 10}}
 101
 102 Reads a signed 16 bit integer from the stream.
 103
 104 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
 105 description of the {\it base} parameter.
 106
 107 \membersection{wxTextInputStream::Read32}\label{wxtextinputstreamread32}
 108
 109 \func{wxUint32}{Read32}{\param{int}{ base = 10}}
 110
 111 Reads a 32 bit unsigned integer from the stream.
 112
 113 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
 114 description of the {\it base} parameter.
 115
 116 \membersection{wxTextInputStream::Read32S}\label{wxtextinputstreamread32s}
 117
 118 \func{wxInt32}{Read32S}{\param{int}{ base = 10}}
 119
 120 Reads a 32 bit signed integer from the stream.
 121
 122 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
 123 description of the {\it base} parameter.
 124
 125 \membersection{wxTextInputStream::ReadChar}\label{wxtextinputstreamreadchar}
 126
 127 \func{wxChar}{wxTextInputStream::ReadChar}{\void}
 128
 129 Reads a character, returns $0$ if there are no more characters in the stream.
 130
 131 \membersection{wxTextInputStream::ReadDouble}\label{wxtextinputstreamreaddouble}
 132
 133 \func{double}{ReadDouble}{\void}
 134
 135 Reads a double (IEEE encoded) from the stream.
 136
 137 \membersection{wxTextInputStream::ReadLine}\label{wxtextinputstreamreadline}
 138
 139 \func{wxString}{wxTextInputStream::ReadLine}{\void}
 140
 141 Reads a line from the input stream and returns it (without the end of line
 142 character).
 143
 144 \membersection{wxTextInputStream::ReadString}\label{wxtextinputstreamreadstring}
 145
 146 \func{wxString}{wxTextInputStream::ReadString}{\void}
 147
 148 {\bf NB:} This method is deprecated, use \helpref{ReadLine}{wxtextinputstreamreadline}
 149 or \helpref{ReadWord}{wxtextinputstreamreadword} instead.
 150
 151 Same as \helpref{ReadLine}{wxtextinputstreamreadline}.
 152
 153 \membersection{wxTextInputStream::ReadWord}\label{wxtextinputstreamreadword}
 154
 155 \func{wxString}{wxTextInputStream::ReadWord}{\void}
 156
 157 Reads a word (a sequence of characters until the next separator) from the
 158 input stream.
 159
 160 \wxheading{See also}
 161
 162 \helpref{SetStringSeparators}{wxtextinputstreamsetstringseparators}
 163
 164 \membersection{wxTextInputStream::SetStringSeparators}\label{wxtextinputstreamsetstringseparators}
 165
 166 \func{void}{SetStringSeparators}{\param{const wxString\& }{sep}}
 167
 168 Sets the characters which are used to define the word boundaries in
 169 \helpref{ReadWord}{wxtextinputstreamreadword}.
 170
 171 The default separators are the space and {\tt TAB} characters.
 172
 173 % ----------------------------------------------------------------------------
 174 % wxTextOutputStream
 175 % ----------------------------------------------------------------------------
 176
 177 \section{\class{wxTextOutputStream}}\label{wxtextoutputstream}
 178
 179 This class provides functions that write text datas using an output stream.
 180 So, you can write {\it text} floats, integers.
 181
 182 You can also simulate the C++ cout class:
 183
 184 \begin{verbatim}
 185   wxFFileOutputStream output( stderr );
 186   wxTextOutputStream cout( output );
 187
 188   cout << "This is a text line" << endl;
 189   cout << 1234;
 190   cout << 1.23456;
 191 \end{verbatim}
 192
 193 The wxTextOutputStream writes text files (or streams) on DOS, Macintosh
 194 and Unix in their native formats (concerning the line ending).
 195
 196 \latexignore{\rtfignore{\wxheading{Members}}}
 197
 198 \membersection{wxTextOutputStream::wxTextOutputStream}\label{wxtextoutputstreamctor}
 199
 200 \func{}{wxTextOutputStream}{\param{wxOutputStream\&}{ stream}, \param{wxEOL}{ mode = wxEOL\_NATIVE}, \param{wxMBConv\&}{ conv = wxConvUTF8}}
 201
 202 Constructs a text stream object associated to the given output stream.
 203
 204 \wxheading{Parameters}
 205
 206 \docparam{stream}{The output stream.}
 207
 208 \docparam{mode}{The end-of-line mode. One of {\bf wxEOL\_NATIVE}, {\bf wxEOL\_DOS}, {\bf wxEOL\_MAC} and {\bf wxEOL\_UNIX}.}
 209
 210 \docparam{conv}{{\it In Unicode build only:} The object used to convert
 211 Unicode text into ASCII characters written to the output stream.}
 212
 213 \membersection{wxTextOutputStream::\destruct{wxTextOutputStream}}\label{wxtextoutputstreamdtor}
 214
 215 \func{}{\destruct{wxTextOutputStream}}{\void}
 216
 217 Destroys the wxTextOutputStream object.
 218
 219 \membersection{wxTextOutputStream::GetMode}\label{wxtextoutputstreamgetmode}
 220
 221 \func{wxEOL}{wxTextOutputStream::GetMode}{\void}
 222
 223 Returns the end-of-line mode. One of {\bf wxEOL\_DOS}, {\bf wxEOL\_MAC} and {\bf wxEOL\_UNIX}.
 224
 225 \membersection{wxTextOutputStream::SetMode}\label{wxtextoutputstreamsetmode}
 226
 227 \func{void}{wxTextOutputStream::SetMode}{{\param wxEOL}{ mode = wxEOL\_NATIVE}}
 228
 229 Set the end-of-line mode. One of {\bf wxEOL\_NATIVE}, {\bf wxEOL\_DOS}, {\bf wxEOL\_MAC} and {\bf wxEOL\_UNIX}.
 230
 231 \membersection{wxTextOutputStream::Write8}\label{wxtextoutputstreamwrite8}
 232
 233 \func{void}{wxTextOutputStream::Write8}{{\param wxUint8 }{i8}}
 234
 235 Writes the single byte {\it i8} to the stream.
 236
 237 \membersection{wxTextOutputStream::Write16}\label{wxtextoutputstreamwrite16}
 238
 239 \func{void}{wxTextOutputStream::Write16}{{\param wxUint16 }{i16}}
 240
 241 Writes the 16 bit integer {\it i16} to the stream.
 242
 243 \membersection{wxTextOutputStream::Write32}\label{wxtextoutputstreamwrite32}
 244
 245 \func{void}{wxTextOutputStream::Write32}{{\param wxUint32 }{i32}}
 246
 247 Writes the 32 bit integer {\it i32} to the stream.
 248
 249 \membersection{wxTextOutputStream::WriteDouble}\label{wxtextoutputstreamwritedouble}
 250
 251 \func{virtual void}{wxTextOutputStream::WriteDouble}{{\param double }{f}}
 252
 253 Writes the double {\it f} to the stream using the IEEE format.
 254
 255 \membersection{wxTextOutputStream::WriteString}\label{wxtextoutputstreamwritestring}
 256
 257 \func{virtual void}{wxTextOutputStream::WriteString}{{\param const wxString\& }{string}}
 258
 259 Writes {\it string} as a line. Depending on the end-of-line mode the end of
 260 line ('$\backslash$n') characters in the string are converted to the correct
 261 line ending terminator.
 262