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319 Commits

Author SHA1 Message Date
Victor Stinner
6c2cdae9e6 Writer APIs: use empty string singletons 
Modify _PyBytesWriter_Finish() and _PyUnicodeWriter_Finish() to return the
empty bytes/Unicode string if the string is empty.
 2015-10-12 13:29:43 +02:00
Victor Stinner
c29e29bed1 Relax _PyBytesWriter API 
Don't require _PyBytesWriter pointer to be a "char *". Same change for
_PyBytesWriter_WriteBytes() parameter.

For example, binascii uses "unsigned char*".
 2015-10-12 13:12:54 +02:00
Victor Stinner
0cdad1e2bc Issue #25349: Add fast path for b'%c' % int 
Optimize also %% formater.
 2015-10-09 22:50:36 +02:00
Victor Stinner
be75b8cf23 Issue #25349: Optimize bytes % int 
Optimize bytes.__mod__(args) for integere formats: %d (%i, %u), %o, %x and %X.
_PyBytesWriter is now used to format directly the integer into the writer
buffer, instead of using a temporary bytes object.

Formatting is between 30% and 50% faster on a microbenchmark.
 2015-10-09 22:43:24 +02:00
Victor Stinner
ce179bf6ba Add _PyBytesWriter_WriteBytes() to factorize the code 2015-10-09 12:57:22 +02:00
Victor Stinner
ad7715891e _PyBytesWriter: simplify code to avoid "prealloc" parameters 
Substract preallocate bytes from min_size before calling
_PyBytesWriter_Prepare().
 2015-10-09 12:38:53 +02:00
Victor Stinner
53926a1ce2 _PyBytesWriter: rename size attribute to min_size 2015-10-09 12:37:03 +02:00
Victor Stinner
fa7762ec06 Issue #25349: Optimize bytes % args using the new private _PyBytesWriter API 
* Thanks to the _PyBytesWriter API, output smaller than 512 bytes are allocated
  on the stack and so avoid calling _PyBytes_Resize(). Because of that, change
  the default buffer size to fmtcnt instead of fmtcnt+100.
* Rely on _PyBytesWriter algorithm to overallocate the buffer instead of using
  a custom code. For example, _PyBytesWriter uses a different overallocation
  factor (25% or 50%) depending on the platform to get best performances.
* Disable overallocation for the last write.
* Replace C loops to fill characters with memset()
* Add also many comments to _PyBytes_Format()
* Remove unused FORMATBUFLEN constant
* Avoid the creation of a temporary bytes object when formatting a floating
  point number (when no custom formatting option is used)
* Fix also reference leaks on error handling
* Use Py_MEMCPY() to copy bytes between two formatters (%)
 2015-10-09 11:48:06 +02:00
Victor Stinner
b3653a3458 Issue #25318: cleanup code _PyBytesWriter 
Rename "stack buffer" to "small buffer".

Add also an assertion in _PyBytesWriter_GetPos().
 2015-10-09 03:38:24 +02:00
Victor Stinner
b13b97d3b8 Issue #25318: Fix compilation error 
Replace "#if Py_DEBUG" with "#ifdef Py_DEBUG".
 2015-10-09 02:52:16 +02:00
Victor Stinner
0016507c16 Issue #25318: Move _PyBytesWriter to bytesobject.c 
Declare also the private API in bytesobject.h.
 2015-10-09 01:53:21 +02:00
Serhiy Storchaka
d92d4efe3d Issue #23573: Restored optimization of bytes.rfind() and bytearray.rfind() 
for single-byte argument on Linux.
 2015-07-20 22:58:02 +03:00
Serhiy Storchaka
ac5569b1fa Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(), 
PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()
to check for and handle errors correctly.
 2015-05-30 17:48:19 +03:00
Serhiy Storchaka
fa494fd883 Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(), 
PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()
to check for and handle errors correctly.
 2015-05-30 17:45:22 +03:00
Serhiy Storchaka
8b2e8b6cce Specify default values of semantic booleans in Argument Clinic generated signatures as booleans. 2015-05-30 11:30:39 +03:00
Gregory P. Smith
8cb6569fe1 Implements issue #9951: Adds a hex() method to bytes, bytearray, & memoryview. 
Also updates a few internal implementations of the same thing to use the
new built-in code.

Contributed by Arnon Yaari.
 2015-04-25 23:22:26 +00:00
Christian Heimes
4e25913f9f Remove local dead code. In both blocks dir is always greater 0. 2015-04-18 05:54:02 +02:00
Larry Hastings
89964c48d1 Issue #23944: Argument Clinic now wraps long impl prototypes at column 78. 2015-04-14 18:07:59 -04:00
Serhiy Storchaka
1009bf18b3 Issue #23501: Argumen Clinic now generates code into separate files by default. 2015-04-03 23:53:51 +03:00
Serhiy Storchaka
41525e31a5 Issue #23466: Raised OverflowError if %c argument is out of range. 2015-04-03 20:53:46 +03:00
Serhiy Storchaka
2c7b5a9d0d Issue #23466: %c, %o, %x, and %X in bytes formatting now raise TypeError on 
non-integer input.
 2015-03-30 09:19:08 +03:00
Victor Stinner
dabbfe7b30 Issue #23573: Fix bytes.rfind() and bytearray.rfind() on Windows 
Windows has no memrchr() function.

This change is only a workaround, the optimization must be reenabled on other
platforms.
 2015-03-25 03:16:32 +01:00
Serhiy Storchaka
d9d769fcdd Issue #23573: Increased performance of string search operations (str.find, 
str.index, str.count, the in operator, str.split, str.partition) with
arguments of different kinds (UCS1, UCS2, UCS4).
 2015-03-24 21:55:47 +02:00
Serhiy Storchaka
1dd49824df Issue #23681: The -b option now affects comparisons of bytes with int. 2015-03-20 16:54:57 +02:00
Ethan Furman
62e977f1b6 Close issue23467: add %r compatibility to bytes and bytearray 2015-03-11 08:17:00 -07:00