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Stream: Peek, PutPtr

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git-svn-id: svn://ultimatepp.org/upp/trunk@2605 f0d560ea-af0d-0410-9eb7-867de7ffcac7
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cxl 2010-08-13 08:57:08 +00:00
parent b82b4f3e6d
commit 06f88f88ce
2 changed files with 19 additions and 0 deletions
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3
uppsrc/Core/Stream.h
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@ -82,6 +82,9 @@ public:
int Term() { return ptr < rdlim ? *ptr : _Term(); }
int Get() { return ptr < rdlim ? *ptr++ : _Get(); }
const byte *Peek(int size = 1) { ASSERT(size > 0); return ptr + size <= rdlim ? ptr : NULL; }
byte *PutPtr(int size = 1) { ASSERT(size > 0); if(ptr + size <= wrlim) { byte *p = ptr; ptr += size; return p; }; return NULL; }
void Put(const void *data, dword size) { if(ptr + size <= wrlim) { memcpy(ptr, data, size); ptr += size; } else _Put(data, size); }
dword Get(void *data, dword size) { if(ptr + size <= rdlim) { memcpy(data, ptr, size); ptr += size; return size; } return _Get(data, size); }

16
uppsrc/Core/src.tpp/Stream$en-us.tpp
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@ -377,6 +377,22 @@ negative value is returned.&]
[s7; [*/ Return value]-|Byte read from input stream.&]
[s3; &]
[s4;%- &]
[s5;:Stream`:`:Peek`(int`):%- [@(0.0.255) const]_[_^byte^ byte]_`*[* Peek]([@(0.0.255) int]_[*@3 s
ize]_`=_[@3 1])&]
[s2; This is a special optimization method; it might return a pointer
to data of [%-*@3 size] bytes at current position in the stream,
but it is allowed to return NULL `- in that case you need to
load data into buffer using Get.&]
[s3; &]
[s4;%- &]
[s5;:Stream`:`:PutPtr`(int`):%- [_^byte^ byte]_`*[* PutPtr]([@(0.0.255) int]_[*@3 size]_`=_[@3 1
])&]
[s2; This is a special optimization method; it might return a writable
pointer where you can write output data of [%-*@3 size] bytes,
but it is allowed to return NULL `- in that case you need to
output data using Put. Advances stream by [%-*@3 size].&]
[s3; &]
[s4;%- &]
[s5;:Stream`:`:Put`(const void`*`,dword`):%- [@(0.0.255) void]_[* Put]([@(0.0.255) const]_[@(0.0.255) v
oid]_`*[*@3 data], [_^dword^ dword]_[*@3 size])&]
[s2; Writes a block of raw binary data to the output stream.&]