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Annotation of researchv10dc/630/man/src/p_man/man3/getwbuf.3r, revision 1.1

1.1     ! root        1: .ds ZZ DEVELOPMENT PACKAGE
        !             2: .TH GETWBUF 3R "630 MTG"
        !             3: .XE "getwbuf()"
        !             4: .XE "putwbuf()"
        !             5: .SH NAME
        !             6: getwbuf, putwbuf, Wbufsize \- access the 630 MTG default terminal emulator buffer
        !             7: .SH SYNOPSIS
        !             8: .B int getwbuf (buf, size)
        !             9: .sp
        !            10: .B int putwbuf (buf, size)
        !            11: .sp
        !            12: .B char \(**buf;
        !            13: .br
        !            14: .B int size;
        !            15: .sp
        !            16: .B int Wbufsize;
        !            17: .SH DESCRIPTION
        !            18: These functions give access to the global
        !            19: text buffer used by the 630 MTG default terminal emulator to hold the last cut, sent
        !            20: or saved text.
        !            21: They offer the ability for cut-and-paste communication between the 
        !            22: default terminal emulator and user's
        !            23: applications.
        !            24: .PP
        !            25: The
        !            26: .I getwbuf
        !            27: function reads from the global text buffer.
        !            28: Up to
        !            29: .I size
        !            30: bytes are copied into the buffer pointed
        !            31: to by
        !            32: .IR buf .
        !            33: The actual number of bytes copied is returned.
        !            34: .PP
        !            35: The
        !            36: .I putwbuf
        !            37: function writes from the character buffer pointed to by
        !            38: .I buf
        !            39: into the global text buffer.
        !            40: The number of bytes copied is returned.
        !            41: The previous content of the global text buffer is thrown away.
        !            42: .PP
        !            43: The global variable
        !            44: .I Wbufsize
        !            45: is the current number of characters in the global buffer used by
        !            46: .I getwbuf
        !            47: and
        !            48: .IR putwbuf .
        !            49: .SH EXAMPLE
        !            50: The following example is a function that takes the global text buffer and
        !            51: converts every 8 continuous spaces into a tab.
        !            52: .sp
        !            53: .nf
        !            54: .RS 3
        !            55: .ft CM
        !            56: tabexpand()
        !            57: {
        !            58:    char buf1[120];
        !            59:    char buf2[120];
        !            60:    int i,j,k,space;
        !            61: 
        !            62:    k = 0;
        !            63:    space = 0;
        !            64:    i = getwbuf(buf1, 120);
        !            65:    for(j=0; j<i; ++j)
        !            66:    {
        !            67:       buf2[k] = buf1[j];
        !            68:       if(buf2[k] == ' ')
        !            69:          space++;
        !            70:       else
        !            71:          space = 0;
        !            72:       if(space == 8)
        !            73:       {  
        !            74:          k -= 7;
        !            75:          buf2[k] = '\\t';
        !            76:          space = 0;
        !            77:       }
        !            78:       ++k;
        !            79:    }
        !            80:    putwbuf(buf2, k);
        !            81: }
        !            82: .fi
        !            83: .RE
        !            84: .ft R

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