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Overview
Comment: | [FRQ 3396731] inline string reverse |
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Downloads: | Tarball | ZIP archive | SQL archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
8ebe975003893c66850c254847ed818e |
User & Date: | jan.nijtmans 2011-08-23 07:08:34 |
Context
2011-08-23
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07:22 | gcc 4.6 (64-bit) warnings check-in: 9d43ce6fe2 user: jan.nijtmans tags: trunk | |
07:08 | [FRQ 3396731] inline string reverse check-in: 8ebe975003 user: jan.nijtmans tags: trunk | |
2011-08-22
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10:19 | merge-mark check-in: 656a0bd6af user: jan.nijtmans tags: trunk | |
Changes
Changes to ChangeLog.
1 2 3 4 5 6 7 | 2011-08-19 Don Porter <[email protected]> * generic/tclIORTrans.c: [Bugs 3393279, 3393280] ReflectClose(.) is missing Tcl_EventuallyFree() calls at some of its exits. * generic/tclIO.c: [Bugs 3394654, 3393276] Revise FlushChannel() to account for the possibility that the ChanWrite() call might recycle | > > > > | 1 2 3 4 5 6 7 8 9 10 11 | 2011-08-23 Jan Nijtmans <[email protected]> * generic/tclStringObj.c: [FRQ 3396731] inline string reverse 2011-08-19 Don Porter <[email protected]> * generic/tclIORTrans.c: [Bugs 3393279, 3393280] ReflectClose(.) is missing Tcl_EventuallyFree() calls at some of its exits. * generic/tclIO.c: [Bugs 3394654, 3393276] Revise FlushChannel() to account for the possibility that the ChanWrite() call might recycle |
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Changes to generic/tclStringObj.c.
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2653 2654 2655 2656 2657 2658 2659 | *--------------------------------------------------------------------------- */ Tcl_Obj * TclStringObjReverse( Tcl_Obj *objPtr) { | < | < | > | | | | | | > > > | | | | > > | < > | < > > | < > | < | | < | > | > > > > > | | < < < | | | | | | | | < | | > > > | > | < | < < | < | < | < > | | < | < < | > | | | | | > > > | > > | < | | < < < | < | < > | > | | < < < | | 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 | *--------------------------------------------------------------------------- */ Tcl_Obj * TclStringObjReverse( Tcl_Obj *objPtr) { char *src, *dest; Tcl_Obj *resultPtr = objPtr; char c; src = TclGetString(objPtr); if (Tcl_IsShared(objPtr)) { resultPtr = Tcl_NewObj(); Tcl_SetObjLength(resultPtr, objPtr->length); dest = TclGetString(resultPtr); memcpy(dest, src, objPtr->length); } else { TclFreeIntRep(objPtr); dest = src; } src = dest + objPtr->length; /* Pass 1: reverse individual bytes of UTF-8 representation. */ while (dest < src) { Tcl_UniChar ch = 0; switch (Tcl_UtfToUniChar(dest, &ch)) { case 1: { ++dest; break; } case 2: { c = dest[0]; dest[0] = dest[1]; dest[1] = c; dest += 2; break; } case 3: { c = dest[0]; dest[0] = dest[2]; dest[2] = c; dest += 3; break; } #if TCL_UTF_MAX > 4 case 5: { c = dest[0]; dest[0] = dest[4]; dest[4] = c; c = dest[1]; dest[1] = dest[3]; dest[3] = c; dest += 5; break; } #endif #if TCL_UTF_MAX > 5 case 6: { c = dest[0]; dest[0] = dest[5]; dest[5] = c; c = dest[1]; dest[1] = dest[4]; dest[4] = c; c = dest[0]; dest[2] = dest[3]; dest[3] = c; dest += 6; break; } #endif default: { #if TCL_UTF_MAX > 3 c = dest[0]; dest[0] = dest[3]; dest[3] = c; c = dest[1]; dest[1] = dest[2]; dest[2] = c; dest += 4; #endif break; } } } /* Pass 2: Reverse byte string. */ dest = TclGetString(resultPtr); while (dest < --src) { c = *src; *src = *dest; *dest++ = c; } return resultPtr; } /* *--------------------------------------------------------------------------- * * FillUnicodeRep -- * |
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