C++ support - provided by Michael Richards <mimiker@scifair.acadiau.ca>n(Apollo Softw...

[catagits/fcgi2.git] / libfcgi / fcgio.cpp

diff --git a/libfcgi/fcgio.cpp b/libfcgi/fcgio.cpp
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+// FILE NAME: fcgio.cpp
+//
+// $Id: fcgio.cpp,v 1.1 1999/08/15 03:37:59 roberts Exp $
+//
+// REWRITTEN BY: Michael Richards  06/20/1999
+//          -added cin support
+//          -added ability to replace cin/cout so existing code only
+//           needs to include the header file and use the normal cin/cout
+//          -added buffered read support which is required by getline
+//
+// ORIGINAL AUTHOR: George Feinberg
+//
+// NOTES: encapsulates FCGI function in an ostream and replaces cin,
+//        cout and cerr
+//
+// This work is based on routines written by George Feinberg. They   
+// have been mostly re-written and extensively changed by
+// Michael Richards.
+//    
+// Copyright (c) 1999 by Apollo Software. All rights reserved.
+//
+// You are free to use this software without charge or royalty
+// as long as this notice is not removed or altered, and recognition
+// is given to the author(s)   
+//   
+
+#include <fcgiapp.h>
+#include "fcgio.h"
+
+
+// the definition that replaces cout and cin
+#ifndef USE_CIN_COUT_CERR
+  fcgio_ostream *FCGIX_cout;
+  fcgio_ostream *FCGIX_cerr;
+  fcgio_istream *FCGIX_cin;
+#endif
+   
+/*---------------------------------------------------------------------*/
+   
+
+// gets a number of characters at once for a more efficient implementation
+int fcgio_buf::xsgetn(char *s, int n) {
+  return FCGX_GetStr(s, n, fcgi_str);
+}
+   
+
+// writes a gob of data out, This is called for things like:
+// output << "hello world"
+// output.write(string, n);
+int fcgio_buf::xsputn(const char* s, int n) {
+  return FCGX_PutStr(s, n, fcgi_str);
+}
+   
+
+// overflow is called for "endl" and every time the put buffer
+// is full. Since we are using a single char put buffer, we just
+// pump the waiting character out and return the number of chars
+// we just got rid of (1). Returns EOF on error
+int fcgio_buf::overflow(int c) {
+  if (c)
+    return FCGX_PutChar(c, fcgi_str);
+  else
+    return EOF;
+}
+
+
+// Underflow is called to get characters to fill up the get buffer
+// so something that uses the stream can get the data. If there
+// is nothing else to read, this returns EOF
+int fcgio_buf::underflow() {
+  // if it is unbuffered, then get & return a char
+  if (unbuffered())
+    return FCGX_GetChar(fcgi_str);
+
+  // read as much data as we can, then adjust the get area so it
+  // reflects the data we just read
+  int numread=FCGX_GetStr(eback(), blen(), fcgi_str);
+  if (numread==0) return EOF;
+  setg(eback(),eback(),eback()+numread);
+
+  return *eback();
+}
+
+
+// sets up any buffering used for input or output   
+streambuf* fcgio_buf::setbuf(char *p, int n) {
+  // if setbuf is offered a buffer, then use it, otherwise, set the stream to unbuffered
+  setb(p,p+n,0);
+  // output is not buffered
+  setp(0,0);
+  setg(p,p+n,p+n);
+
+  unbuffered(p==NULL);
+  return this;
+}
+
+
+// flush all the output using FCGX_FFlush
+int fcgio_buf::sync() {
+  return FCGX_FFlush(fcgi_str); 
+}
+
+
+// constructor calls ios::init to assign our streambuf to
+// the ostream derived class. Also sets up buffering
+fcgio_ostream::fcgio_ostream(FCGX_Stream *str) : buf(str) {
+  // init is a protected member of ios
+  init(&buf);
+  buf.setbuf(NULL,0);
+}
+
+
+// constructor calls ios::init to assign our streambuf to
+// the ostream derived class. Also sets up buffering
+fcgio_istream::fcgio_istream(FCGX_Stream *str) : buf(str) {
+  // init is a protected member of ios
+  init(&buf);
+  // set up the buffers
+  buf.setbuf(buffer,buffersize);
+}
+
+