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31 #ifndef SQUID_STORE_ENTRY_STREAM_H
32 #define SQUID_STORE_ENTRY_STREAM_H
41 * This class provides a streambuf interface for writing
42 * to StoreEntries. Typical use is via a StoreEntryStream
43 * rather than direct manipulation
46 class StoreEntryStreamBuf
: public std::streambuf
50 StoreEntryStreamBuf(StoreEntry
*anEntry
) : theEntry(anEntry
) {
51 theEntry
->lock("StoreEntryStreamBuf");
55 ~StoreEntryStreamBuf() {
56 theEntry
->unlock("StoreEntryStreamBuf");
60 /* flush the current buffer and the character that is overflowing
63 virtual int_type
overflow(int_type aChar
= traits_type::eof()) {
64 std::streamsize
pending(pptr() - pbase());
66 if (pending
&& sync ())
67 return traits_type::eof();
69 if (aChar
!= traits_type::eof()) {
70 // NP: cast because GCC promotes int_type to 32-bit type
71 // std::basic_streambuf<char>::int_type {aka int}
72 // despite the definition with 8-bit type value.
73 char chars
[1] = {char(aChar
)};
75 if (aChar
!= traits_type::eof())
76 theEntry
->append(chars
, 1);
79 pbump (-pending
); // Reset pptr().
83 /* push the buffer to the store */
85 std::streamsize
pending(pptr() - pbase());
88 theEntry
->append(pbase(), pending
);
95 /* write multiple characters to the store entry
96 * - this is an optimisation method.
98 virtual std::streamsize
xsputn(const char * chars
, std::streamsize number
) {
100 theEntry
->append(chars
, number
);
106 StoreEntry
*theEntry
;
110 class StoreEntryStream
: public std::ostream
114 /* create a stream for writing text etc into theEntry */
115 // See http://www.codecomments.com/archive292-2005-2-396222.html
116 StoreEntryStream(StoreEntry
*entry
): std::ostream(0), theBuffer(entry
) {
117 rdbuf(&theBuffer
); // set the buffer to now-initialized theBuffer
118 clear(); //clear badbit set by calling init(0)
122 StoreEntryStreamBuf theBuffer
;
125 #endif /* SQUID_STORE_ENTRY_STREAM_H */