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
  45 \membersection{wxTextInputStream::wxTextInputStream}\label{wxtextinputstreamctor}
  46
  47 \func{}{wxTextInputStream}{\param{wxInputStream\&}{ stream}, \param{const wxString\&}{ sep=" $\backslash$t"},
  48   \param{wxMBConv\&}{ conv = wxConvUTF8} }
  49
  50 Constructs a text stream associated to the given input stream.
  51
  52 \wxheading{Parameters}
  53
  54 \docparam{stream}{The underlying input stream.}
  55
  56 \docparam{sep}{The initial string separator characters.}
  57
  58 \docparam{conv}{{\it In Unicode build only:} The encoding converter used to convert the bytes in the
  59   underlying input stream to characters.}
  60
  61
  62 \membersection{wxTextInputStream::\destruct{wxTextInputStream}}\label{wxtextinputstreamdtor}
  63
  64 \func{}{\destruct{wxTextInputStream}}{\void}
  65
  66 Destroys the wxTextInputStream object.
  67
  68
  69 \membersection{wxTextInputStream::Read8}\label{wxtextinputstreamread8}
  70
  71 \func{wxUint8}{Read8}{\param{int}{ base = 10}}
  72
  73 Reads a single unsigned byte from the stream, given in base {\it base}.
  74
  75 The value of {\it base} must be comprised between $2$ and $36$, inclusive, or
  76 be a special value $0$ which means that the usual rules of {\tt C} numbers are
  77 applied: if the number starts with {\tt 0x} it is considered to be in base
  78 $16$, if it starts with {\tt 0} - in base $8$ and in base $10$ otherwise. Note
  79 that you may not want to specify the base $0$ if you are parsing the numbers
  80 which may have leading zeroes as they can yield unexpected (to the user not
  81 familiar with C) results.
  82
  83
  84 \membersection{wxTextInputStream::Read8S}\label{wxtextinputstreamread8s}
  85
  86 \func{wxInt8}{Read8S}{\param{int}{ base = 10}}
  87
  88 Reads a single signed byte from the stream.
  89
  90 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
  91 description of the {\it base} parameter.
  92
  93
  94 \membersection{wxTextInputStream::Read16}\label{wxtextinputstreamread16}
  95
  96 \func{wxUint16}{Read16}{\param{int}{ base = 10}}
  97
  98 Reads a unsigned 16 bit integer from the stream.
  99
 100 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
 101 description of the {\it base} parameter.
 102
 103
 104 \membersection{wxTextInputStream::Read16S}\label{wxtextinputstreamread16s}
 105
 106 \func{wxInt16}{Read16S}{\param{int}{ base = 10}}
 107
 108 Reads a signed 16 bit integer from the stream.
 109
 110 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
 111 description of the {\it base} parameter.
 112
 113
 114 \membersection{wxTextInputStream::Read32}\label{wxtextinputstreamread32}
 115
 116 \func{wxUint32}{Read32}{\param{int}{ base = 10}}
 117
 118 Reads a 32 bit unsigned integer from the stream.
 119
 120 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
 121 description of the {\it base} parameter.
 122
 123
 124 \membersection{wxTextInputStream::Read32S}\label{wxtextinputstreamread32s}
 125
 126 \func{wxInt32}{Read32S}{\param{int}{ base = 10}}
 127
 128 Reads a 32 bit signed integer from the stream.
 129
 130 See \helpref{wxTextInputStream::Read8}{wxtextinputstreamread8} for the
 131 description of the {\it base} parameter.
 132
 133
 134 \membersection{wxTextInputStream::GetChar}\label{wxtextinputstreamgetchar}
 135
 136 \func{wxChar}{GetChar}{\void}
 137
 138 Reads a character, returns $0$ if there are no more characters in the stream.
 139
 140
 141 \membersection{wxTextInputStream::ReadDouble}\label{wxtextinputstreamreaddouble}
 142
 143 \func{double}{ReadDouble}{\void}
 144
 145 Reads a double (IEEE encoded) from the stream.
 146
 147
 148 \membersection{wxTextInputStream::ReadLine}\label{wxtextinputstreamreadline}
 149
 150 \func{wxString}{ReadLine}{\void}
 151
 152 Reads a line from the input stream and returns it (without the end of line
 153 character).
 154
 155
 156 \membersection{wxTextInputStream::ReadString}\label{wxtextinputstreamreadstring}
 157
 158 \func{wxString}{ReadString}{\void}
 159
 160 {\bf NB:} This method is deprecated, use \helpref{ReadLine}{wxtextinputstreamreadline}
 161 or \helpref{ReadWord}{wxtextinputstreamreadword} instead.
 162
 163 Same as \helpref{ReadLine}{wxtextinputstreamreadline}.
 164
 165
 166 \membersection{wxTextInputStream::ReadWord}\label{wxtextinputstreamreadword}
 167
 168 \func{wxString}{ReadWord}{\void}
 169
 170 Reads a word (a sequence of characters until the next separator) from the
 171 input stream.
 172
 173 \wxheading{See also}
 174
 175 \helpref{SetStringSeparators}{wxtextinputstreamsetstringseparators}
 176
 177
 178 \membersection{wxTextInputStream::SetStringSeparators}\label{wxtextinputstreamsetstringseparators}
 179
 180 \func{void}{SetStringSeparators}{\param{const wxString\& }{sep}}
 181
 182 Sets the characters which are used to define the word boundaries in
 183 \helpref{ReadWord}{wxtextinputstreamreadword}.
 184
 185 The default separators are the space and {\tt TAB} characters.
 186
 187 % ----------------------------------------------------------------------------
 188 % wxTextOutputStream
 189 % ----------------------------------------------------------------------------
 190
 191 \section{\class{wxTextOutputStream}}\label{wxtextoutputstream}
 192
 193 This class provides functions that write text datas using an output stream.
 194 So, you can write {\it text} floats, integers.
 195
 196 You can also simulate the C++ cout class:
 197
 198 \begin{verbatim}
 199   wxFFileOutputStream output( stderr );
 200   wxTextOutputStream cout( output );
 201
 202   cout << "This is a text line" << endl;
 203   cout << 1234;
 204   cout << 1.23456;
 205 \end{verbatim}
 206
 207 The wxTextOutputStream writes text files (or streams) on DOS, Macintosh
 208 and Unix in their native formats (concerning the line ending).
 209
 210 \wxheading{Include files}
 211
 212 <wx/txtstrm.h>
 213
 214 \latexignore{\rtfignore{\wxheading{Members}}}
 215
 216
 217 \membersection{wxTextOutputStream::wxTextOutputStream}\label{wxtextoutputstreamctor}
 218
 219 \func{}{wxTextOutputStream}{\param{wxOutputStream\&}{ stream}, \param{wxEOL}{ mode = wxEOL\_NATIVE}, \param{wxMBConv\&}{ conv = wxConvUTF8}}
 220
 221 Constructs a text stream object associated to the given output stream.
 222
 223 \wxheading{Parameters}
 224
 225 \docparam{stream}{The output stream.}
 226
 227 \docparam{mode}{The end-of-line mode. One of {\bf wxEOL\_NATIVE}, {\bf wxEOL\_DOS}, {\bf wxEOL\_MAC} and {\bf wxEOL\_UNIX}.}
 228
 229 \docparam{conv}{{\it In Unicode build only:} The object used to convert
 230 Unicode text into ASCII characters written to the output stream.}
 231
 232
 233 \membersection{wxTextOutputStream::\destruct{wxTextOutputStream}}\label{wxtextoutputstreamdtor}
 234
 235 \func{}{\destruct{wxTextOutputStream}}{\void}
 236
 237 Destroys the wxTextOutputStream object.
 238
 239
 240 \membersection{wxTextOutputStream::GetMode}\label{wxtextoutputstreamgetmode}
 241
 242 \func{wxEOL}{GetMode}{\void}
 243
 244 Returns the end-of-line mode. One of {\bf wxEOL\_DOS}, {\bf wxEOL\_MAC} and {\bf wxEOL\_UNIX}.
 245
 246
 247 \membersection{wxTextOutputStream::PutChar}\label{wxtextoutputstreamputchar}
 248
 249 \func{void}{PutChar}{{\param wxChar }{c}}
 250
 251 Writes a character to the stream.
 252
 253
 254 \membersection{wxTextOutputStream::SetMode}\label{wxtextoutputstreamsetmode}
 255
 256 \func{void}{SetMode}{{\param wxEOL}{ mode = wxEOL\_NATIVE}}
 257
 258 Set the end-of-line mode. One of {\bf wxEOL\_NATIVE}, {\bf wxEOL\_DOS}, {\bf wxEOL\_MAC} and {\bf wxEOL\_UNIX}.
 259
 260
 261 \membersection{wxTextOutputStream::Write8}\label{wxtextoutputstreamwrite8}
 262
 263 \func{void}{Write8}{{\param wxUint8 }{i8}}
 264
 265 Writes the single byte {\it i8} to the stream.
 266
 267
 268 \membersection{wxTextOutputStream::Write16}\label{wxtextoutputstreamwrite16}
 269
 270 \func{void}{Write16}{{\param wxUint16 }{i16}}
 271
 272 Writes the 16 bit integer {\it i16} to the stream.
 273
 274
 275 \membersection{wxTextOutputStream::Write32}\label{wxtextoutputstreamwrite32}
 276
 277 \func{void}{Write32}{{\param wxUint32 }{i32}}
 278
 279 Writes the 32 bit integer {\it i32} to the stream.
 280
 281
 282 \membersection{wxTextOutputStream::WriteDouble}\label{wxtextoutputstreamwritedouble}
 283
 284 \func{virtual void}{WriteDouble}{{\param double }{f}}
 285
 286 Writes the double {\it f} to the stream using the IEEE format.
 287
 288
 289 \membersection{wxTextOutputStream::WriteString}\label{wxtextoutputstreamwritestring}
 290
 291 \func{virtual void}{WriteString}{{\param const wxString\& }{string}}
 292
 293 Writes {\it string} as a line. Depending on the end-of-line mode the end of
 294 line ('$\backslash$n') characters in the string are converted to the correct
 295 line ending terminator.
 296