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author | dgp <dgp@users.sourceforge.net> | 2016-04-11 01:07:31 (GMT) |
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committer | dgp <dgp@users.sourceforge.net> | 2016-04-11 01:07:31 (GMT) |
commit | e99801350e318fed721f70b2552e2c404272eccf (patch) | |
tree | ca425940eda6d682a42217aa49597c8c24b92f57 /generic/tclUtil.c | |
parent | dca46ef751365e471d2fec75f00272f2041b49b7 (diff) | |
download | tcl-e99801350e318fed721f70b2552e2c404272eccf.zip tcl-e99801350e318fed721f70b2552e2c404272eccf.tar.gz tcl-e99801350e318fed721f70b2552e2c404272eccf.tar.bz2 |
Revise the "end-offset" objType to use proposed routines, and not export or
provide unneeded things.
Diffstat (limited to 'generic/tclUtil.c')
-rw-r--r-- | generic/tclUtil.c | 157 |
1 files changed, 34 insertions, 123 deletions
diff --git a/generic/tclUtil.c b/generic/tclUtil.c index 01f8225..08fc735 100644 --- a/generic/tclUtil.c +++ b/generic/tclUtil.c @@ -108,9 +108,8 @@ static void ClearHash(Tcl_HashTable *tablePtr); static void FreeProcessGlobalValue(ClientData clientData); static void FreeThreadHash(ClientData clientData); static Tcl_HashTable * GetThreadHash(Tcl_ThreadDataKey *keyPtr); -static int SetEndOffsetFromAny(Tcl_Interp *interp, - Tcl_Obj *objPtr); -static void UpdateStringOfEndOffset(Tcl_Obj *objPtr); +static int GetEndOffsetFromObj(Tcl_Obj *objPtr, int endValue, + int *indexPtr); static int FindElement(Tcl_Interp *interp, const char *string, int stringLength, const char *typeStr, const char *typeCode, const char **elementPtr, @@ -123,12 +122,12 @@ static int FindElement(Tcl_Interp *interp, const char *string, * integer, so no memory management is required for it. */ -const Tcl_ObjType tclEndOffsetType = { +static const Tcl_ObjType endOffsetType = { "end-offset", /* name */ NULL, /* freeIntRepProc */ NULL, /* dupIntRepProc */ - UpdateStringOfEndOffset, /* updateStringProc */ - SetEndOffsetFromAny + NULL, /* updateStringProc */ + NULL }; /* @@ -3560,13 +3559,7 @@ TclGetIntForIndex( return TCL_OK; } - if (SetEndOffsetFromAny(NULL, objPtr) == TCL_OK) { - /* - * If the object is already an offset from the end of the list, or can - * be converted to one, use it. - */ - - *indexPtr = endValue + objPtr->internalRep.longValue; + if (GetEndOffsetFromObj(objPtr, endValue, indexPtr) == TCL_OK) { return TCL_OK; } @@ -3632,135 +3625,53 @@ TclGetIntForIndex( /* *---------------------------------------------------------------------- * - * UpdateStringOfEndOffset -- - * - * Update the string rep of a Tcl object holding an "end-offset" - * expression. - * - * Results: - * None. - * - * Side effects: - * Stores a valid string in the object's string rep. - * - * This function does NOT free any earlier string rep. If it is called on an - * object that already has a valid string rep, it will leak memory. - * - *---------------------------------------------------------------------- - */ - -static void -UpdateStringOfEndOffset( - register Tcl_Obj *objPtr) -{ - char *dst = Tcl_InitStringRep(objPtr, NULL, TCL_INTEGER_SPACE + 5); - int len = 3; - - TclOOM(dst, TCL_INTEGER_SPACE + 6); - - memcpy(dst, "end", len); - if (objPtr->internalRep.longValue != 0) { - dst[len++] = '-'; - len += TclFormatInt(dst+len, -(objPtr->internalRep.longValue)); - } - - (void) Tcl_InitStringRep(objPtr, NULL, len); -} - -/* - *---------------------------------------------------------------------- - * - * SetEndOffsetFromAny -- + * GetEndOffsetFromObj -- * * Look for a string of the form "end[+-]offset" and convert it to an * internal representation holding the offset. * * Results: - * Returns TCL_OK if ok, TCL_ERROR if the string was badly formed. + * Tcl return code. * * Side effects: - * If interp is not NULL, stores an error message in the interpreter - * result. + * May store a Tcl_ObjType. * *---------------------------------------------------------------------- */ static int -SetEndOffsetFromAny( - Tcl_Interp *interp, /* Tcl interpreter or NULL */ - Tcl_Obj *objPtr) /* Pointer to the object to parse */ +GetEndOffsetFromObj( + Tcl_Obj *objPtr, /* Pointer to the object to parse */ + int endValue, /* The value to be stored at "indexPtr" if + * "objPtr" holds "end". */ + int *indexPtr) /* Location filled in with an integer + * representing an index. */ { - int offset; /* Offset in the "end-offset" expression */ - register const char *bytes; /* String rep of the object */ - int length; /* Length of the object's string rep */ + const Tcl_ObjIntRep *irPtr; - /* - * If it's already the right type, we're fine. - */ + while (NULL == (irPtr = Tcl_FetchIntRep(objPtr, &endOffsetType))) { + Tcl_ObjIntRep ir; + int length, offset = 0; + const char *bytes = TclGetStringFromObj(objPtr, &length); - if (objPtr->typePtr == &tclEndOffsetType) { - return TCL_OK; - } - - /* - * Check for a string rep of the right form. - */ - - bytes = TclGetStringFromObj(objPtr, &length); - if ((*bytes != 'e') || (strncmp(bytes, "end", - (size_t)((length > 3) ? 3 : length)) != 0)) { - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "bad index \"%s\": must be end?[+-]integer?", bytes)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "INDEX", NULL); - } - return TCL_ERROR; - } - - /* - * Convert the string rep. - */ - - if (length <= 3) { - offset = 0; - } else if ((length > 4) && ((bytes[3] == '-') || (bytes[3] == '+'))) { - /* - * This is our limited string expression evaluator. Pass everything - * after "end-" to Tcl_GetInt, then reverse for offset. - */ - - if (TclIsSpaceProc(bytes[4])) { - goto badIndexFormat; - } - if (Tcl_GetInt(interp, bytes+4, &offset) != TCL_OK) { + if ((length == 4) || (*bytes != 'e') || (strncmp(bytes, "end", + (size_t)((length > 3) ? 3 : length)) != 0)) { return TCL_ERROR; } - if (bytes[3] == '-') { - offset = -offset; - } - } else { - /* - * Conversion failed. Report the error. - */ - - badIndexFormat: - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "bad index \"%s\": must be end?[+-]integer?", bytes)); - Tcl_SetErrorCode(interp, "TCL", "VALUE", "INDEX", NULL); + if (length > 4) { + if (((bytes[3] != '-') && (bytes[3] != '+')) + || (TclIsSpaceProc(bytes[4])) + || (TCL_OK != Tcl_GetInt(NULL, bytes+4, &offset))) { + return TCL_ERROR; + } + if (bytes[3] == '-') { + offset = -offset; + } } - return TCL_ERROR; + ir.longValue = offset; + Tcl_StoreIntRep(objPtr, &endOffsetType, &ir); } - - /* - * The conversion succeeded. Free the old internal rep and set the new - * one. - */ - - TclFreeIntRep(objPtr); - objPtr->internalRep.longValue = offset; - objPtr->typePtr = &tclEndOffsetType; - + *indexPtr = endValue + irPtr->longValue; return TCL_OK; } |