/* * tclPkg.c -- * * This file implements package and version control for Tcl via the * "package" command and a few C APIs. * * Copyright (c) 1996 Sun Microsystems, Inc. * Copyright (c) 2006 Andreas Kupries * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclPkg.c,v 1.19 2006/09/28 20:54:45 andreas_kupries Exp $ * * TIP #268. * Heavily rewritten to handle the extend version numbers, and extended * package requirements. */ #include "tclInt.h" /* * Each invocation of the "package ifneeded" command creates a structure of * the following type, which is used to load the package into the interpreter * if it is requested with a "package require" command. */ typedef struct PkgAvail { char *version; /* Version string; malloc'ed. */ char *script; /* Script to invoke to provide this version of * the package. Malloc'ed and protected by * Tcl_Preserve and Tcl_Release. */ struct PkgAvail *nextPtr; /* Next in list of available versions of the * same package. */ } PkgAvail; /* * For each package that is known in any way to an interpreter, there is one * record of the following type. These records are stored in the * "packageTable" hash table in the interpreter, keyed by package name such as * "Tk" (no version number). */ typedef struct Package { char *version; /* Version that has been supplied in this * interpreter via "package provide" * (malloc'ed). NULL means the package * doesn't exist in this interpreter yet. */ PkgAvail *availPtr; /* First in list of all available versions of * this package. */ ClientData clientData; /* Client data. */ } Package; /* * Prototypes for functions defined in this file: */ static int CheckVersionAndConvert(Tcl_Interp *interp, CONST char *string, char** internal, int* stable); static int CompareVersions(char *v1i, char *v2i, int *isMajorPtr); static int CheckRequirement(Tcl_Interp *interp, CONST char *string); static int CheckAllRequirements(Tcl_Interp* interp, int reqc, Tcl_Obj *CONST reqv[]); static int RequirementSatisfied(char *havei, CONST char *req); static int AllRequirementsSatisfied(char *havei, int reqc, Tcl_Obj *CONST reqv[]); static void AddRequirementsToResult(Tcl_Interp* interp, int reqc, Tcl_Obj *CONST reqv[]); static void AddRequirementsToDString(Tcl_DString* dstring, int reqc, Tcl_Obj *CONST reqv[]); static Package * FindPackage(Tcl_Interp *interp, CONST char *name); static Tcl_Obj* ExactRequirement(CONST char* version); static void VersionCleanupProc(ClientData clientData, Tcl_Interp *interp); /* *---------------------------------------------------------------------- * * Tcl_PkgProvide / Tcl_PkgProvideEx -- * * This function is invoked to declare that a particular version of a * particular package is now present in an interpreter. There must not be * any other version of this package already provided in the interpreter. * * Results: * Normally returns TCL_OK; if there is already another version of the * package loaded then TCL_ERROR is returned and an error message is left * in the interp's result. * * Side effects: * The interpreter remembers that this package is available, so that no * other version of the package may be provided for the interpreter. * *---------------------------------------------------------------------- */ int Tcl_PkgProvide( Tcl_Interp *interp, /* Interpreter in which package is now * available. */ CONST char *name, /* Name of package. */ CONST char *version) /* Version string for package. */ { return Tcl_PkgProvideEx(interp, name, version, (ClientData) NULL); } int Tcl_PkgProvideEx( Tcl_Interp *interp, /* Interpreter in which package is now * available. */ CONST char *name, /* Name of package. */ CONST char *version, /* Version string for package. */ ClientData clientData) /* clientdata for this package (normally used * for C callback function table) */ { Package *pkgPtr; char* pvi; char* vi; int res; pkgPtr = FindPackage(interp, name); if (pkgPtr->version == NULL) { pkgPtr->version = ckalloc((unsigned) (strlen(version) + 1)); strcpy(pkgPtr->version, version); pkgPtr->clientData = clientData; return TCL_OK; } if (CheckVersionAndConvert (interp, pkgPtr->version, &pvi, NULL) != TCL_OK) { return TCL_ERROR; } else if (CheckVersionAndConvert (interp, version, &vi, NULL) != TCL_OK) { Tcl_Free (pvi); return TCL_ERROR; } res = CompareVersions(pvi, vi, NULL); Tcl_Free (pvi); Tcl_Free (vi); if (res == 0) { if (clientData != NULL) { pkgPtr->clientData = clientData; } return TCL_OK; } Tcl_AppendResult(interp, "conflicting versions provided for package \"", name, "\": ", pkgPtr->version, ", then ", version, NULL); return TCL_ERROR; } /* *---------------------------------------------------------------------- * * Tcl_PkgRequire / Tcl_PkgRequireEx / Tcl_PkgRequireProc -- * * This function is called by code that depends on a particular version * of a particular package. If the package is not already provided in the * interpreter, this function invokes a Tcl script to provide it. If the * package is already provided, this function makes sure that the * caller's needs don't conflict with the version that is present. * * Results: * If successful, returns the version string for the currently provided * version of the package, which may be different from the "version" * argument. If the caller's requirements cannot be met (e.g. the version * requested conflicts with a currently provided version, or the required * version cannot be found, or the script to provide the required version * generates an error), NULL is returned and an error message is left in * the interp's result. * * Side effects: * The script from some previous "package ifneeded" command may be * invoked to provide the package. * *---------------------------------------------------------------------- */ CONST char * Tcl_PkgRequire( Tcl_Interp *interp, /* Interpreter in which package is now * available. */ CONST char *name, /* Name of desired package. */ CONST char *version, /* Version string for desired version; NULL * means use the latest version available. */ int exact) /* Non-zero means that only the particular * version given is acceptable. Zero means use * the latest compatible version. */ { return Tcl_PkgRequireEx(interp, name, version, exact, NULL); } CONST char * Tcl_PkgRequireEx( Tcl_Interp *interp, /* Interpreter in which package is now * available. */ CONST char *name, /* Name of desired package. */ CONST char *version, /* Version string for desired version; NULL * means use the latest version available. */ int exact, /* Non-zero means that only the particular * version given is acceptable. Zero means use * the latest compatible version. */ ClientData *clientDataPtr) /* Used to return the client data for this * package. If it is NULL then the client data * is not returned. This is unchanged if this * call fails for any reason. */ { Tcl_Obj *ov; int res; /* * If an attempt is being made to load this into a standalone executable * on a platform where backlinking is not supported then this must be a * shared version of Tcl (Otherwise the load would have failed). Detect * this situation by checking that this library has been correctly * initialised. If it has not been then return immediately as nothing will * work. */ if (tclEmptyStringRep == NULL) { /* * OK, so what's going on here? * * First, what are we doing? We are performing a check on behalf of * one particular caller, Tcl_InitStubs(). When a package is stub- * enabled, it is statically linked to libtclstub.a, which contains a * copy of Tcl_InitStubs(). When a stub-enabled package is loaded, its * *_Init() function is supposed to call Tcl_InitStubs() before * calling any other functions in the Tcl library. The first Tcl * function called by Tcl_InitStubs() through the stub table is * Tcl_PkgRequireEx(), so this code right here is the first code that * is part of the original Tcl library in the executable that gets * executed on behalf of a newly loaded stub-enabled package. * * One easy error for the developer/builder of a stub-enabled package * to make is to forget to define USE_TCL_STUBS when compiling the * package. When that happens, the package will contain symbols that * are references to the Tcl library, rather than function pointers * referencing the stub table. On platforms that lack backlinking, * those unresolved references may cause the loading of the package to * also load a second copy of the Tcl library, leading to all kinds of * trouble. We would like to catch that error and report a useful * message back to the user. That's what we're doing. * * Second, how does this work? If we reach this point, then the global * variable tclEmptyStringRep has the value NULL. Compare that with * the definition of tclEmptyStringRep near the top of the file * generic/tclObj.c. It clearly should not have the value NULL; it * should point to the char tclEmptyString. If we see it having the * value NULL, then somehow we are seeing a Tcl library that isn't * completely initialized, and that's an indicator for the error * condition described above. (Further explanation is welcome.) * * Third, so what do we do about it? This situation indicates the * package we just loaded wasn't properly compiled to be stub-enabled, * yet it thinks it is stub-enabled (it called Tcl_InitStubs()). We * want to report that the package just loaded is broken, so we want * to place an error message in the interpreter result and return NULL * to indicate failure to Tcl_InitStubs() so that it will also fail. * (Further explanation why we don't want to Tcl_Panic() is welcome. * After all, two Tcl libraries can't be a good thing!) * * Trouble is that's going to be tricky. We're now using a Tcl library * that's not fully initialized. In particular, it doesn't have a * proper value for tclEmptyStringRep. The Tcl_Obj system heavily * depends on the value of tclEmptyStringRep and all of Tcl depends * (increasingly) on the Tcl_Obj system, we need to correct that flaw * before making the calls to set the interpreter result to the error * message. That's the only flaw corrected; other problems with * initialization of the Tcl library are not remedied, so be very * careful about adding any other calls here without checking how they * behave when initialization is incomplete. */ tclEmptyStringRep = &tclEmptyString; Tcl_AppendResult(interp, "Cannot load package \"", name, "\" in standalone executable: This package is not ", "compiled with stub support", NULL); return NULL; } /* Translate between old and new API, and defer to the new function. */ if (exact) { ov = ExactRequirement (version); } else { ov = Tcl_NewStringObj (version,-1); } Tcl_IncrRefCount (ov); res = Tcl_PkgRequireProc(interp, name, 1, &ov, clientDataPtr); Tcl_DecrRefCount (ov); if (res != TCL_OK) { return NULL; } /* This function returns the version string explictly, and leaves the * interpreter result empty. However "Tcl_PkgRequireProc" above returned * the version through the interpreter result. Simply resetting the result * now potentially deletes the string (obj), and the pointer to its string * rep we have, as our result, may be dangling due to this. Our solution * is to remember the object in interp associated data, with a proper * reference count, and then reset the result. Now pointers will not * dangle. It will be a leak however if nothing is done. So the next time * we come through here we delete the object remembered by this call, as * we can then be sure that there is no pointer to its string around * anymore. Beyond that we have a deletion function which cleans up the last * remembered object which was not cleaned up directly, here. */ ov = (Tcl_Obj*) Tcl_GetAssocData (interp, "tcl/Tcl_PkgRequireEx", NULL); if (ov != NULL) { Tcl_DecrRefCount (ov); } ov = Tcl_GetObjResult (interp); Tcl_IncrRefCount (ov); Tcl_SetAssocData(interp, "tcl/Tcl_PkgRequireEx", VersionCleanupProc, (ClientData) ov); Tcl_ResetResult (interp); return Tcl_GetString (ov); } int Tcl_PkgRequireProc( Tcl_Interp *interp, /* Interpreter in which package is now * available. */ CONST char *name, /* Name of desired package. */ int reqc, /* Requirements constraining the desired version. */ Tcl_Obj *CONST reqv[], /* 0 means to use the latest version available. */ ClientData *clientDataPtr) { Interp *iPtr = (Interp *) interp; Package *pkgPtr; PkgAvail *availPtr, *bestPtr, *bestStablePtr; char *availVersion, *bestVersion; /* Internal rep. of versions */ int availStable; char *script; int code, satisfies, pass; Tcl_DString command; char* pkgVersionI; /* * It can take up to three passes to find the package: one pass to run the * "package unknown" script, one to run the "package ifneeded" script for * a specific version, and a final pass to lookup the package loaded by * the "package ifneeded" script. */ for (pass = 1; ; pass++) { pkgPtr = FindPackage(interp, name); if (pkgPtr->version != NULL) { break; } /* * Check whether we're already attempting to load some version * of this package (circular dependency detection). */ if (pkgPtr->clientData != NULL) { Tcl_AppendResult(interp, "circular package dependency: ", "attempt to provide ", name, " ", (char *)(pkgPtr->clientData), " requires ", name, NULL); AddRequirementsToResult (interp, reqc, reqv); return TCL_ERROR; } /* * The package isn't yet present. Search the list of available * versions and invoke the script for the best available version. * We are actually locating the best, and the best stable version. * One of them is then chosen based on the selection mode. */ bestPtr = NULL; bestStablePtr = NULL; bestVersion = NULL; for (availPtr = pkgPtr->availPtr; availPtr != NULL; availPtr = availPtr->nextPtr) { if (CheckVersionAndConvert (interp, availPtr->version, &availVersion, &availStable) != TCL_OK) { /* The provided version number is has invalid syntax. This * should not happen. This should have been caught by the * 'package ifneeded' registering the package. */ continue; } if (bestPtr != NULL) { int res = CompareVersions (availVersion, bestVersion, NULL); /* Note: Use internal reps! */ if (res <= 0) { /* The version of the package sought is not as good as the * currently selected version. Ignore it. */ Tcl_Free (availVersion); availVersion = NULL; continue; } } /* We have found a version which is better than our max. */ if (reqc > 0) { /* Check satisfaction of requirements */ satisfies = AllRequirementsSatisfied (availVersion, reqc, reqv); if (!satisfies) { Tcl_Free (availVersion); availVersion = NULL; continue; } } bestPtr = availPtr; if (bestVersion != NULL) Tcl_Free (bestVersion); bestVersion = availVersion; /* If this new best version is stable then it also has to be * better than the max stable version found so far. */ if (availStable) { bestStablePtr = availPtr; } } if (bestVersion != NULL) { Tcl_Free (bestVersion); } /* Now choose a version among the two best. For 'latest' we simply * take (actually keep) the best. For 'stable' we take the best * stable, if there is any, or the best if there is nothing stable. */ if ((iPtr->packagePrefer == PKG_PREFER_STABLE) && (bestStablePtr != NULL)) { bestPtr = bestStablePtr; } if (bestPtr != NULL) { /* * We found an ifneeded script for the package. Be careful while * executing it: this could cause reentrancy, so (a) protect the * script itself from deletion and (b) don't assume that bestPtr * will still exist when the script completes. */ CONST char *versionToProvide = bestPtr->version; script = bestPtr->script; pkgPtr->clientData = (ClientData) versionToProvide; Tcl_Preserve((ClientData) script); Tcl_Preserve((ClientData) versionToProvide); code = Tcl_EvalEx(interp, script, -1, TCL_EVAL_GLOBAL); Tcl_Release((ClientData) script); pkgPtr = FindPackage(interp, name); if (code == TCL_OK) { Tcl_ResetResult(interp); if (pkgPtr->version == NULL) { code = TCL_ERROR; Tcl_AppendResult(interp, "attempt to provide package ", name, " ", versionToProvide, " failed: no version of package ", name, " provided", NULL); } else { char* pvi; char* vi; int res; if (CheckVersionAndConvert (interp, pkgPtr->version, &pvi, NULL) != TCL_OK) { code = TCL_ERROR; } else if (CheckVersionAndConvert (interp, versionToProvide, &vi, NULL) != TCL_OK) { Tcl_Free (pvi); code = TCL_ERROR; } else { res = CompareVersions(pvi, vi, NULL); Tcl_Free (pvi); Tcl_Free (vi); if (res != 0) { code = TCL_ERROR; Tcl_AppendResult(interp, "attempt to provide package ", name, " ", versionToProvide, " failed: package ", name, " ", pkgPtr->version, " provided instead", NULL); } } } } else if (code != TCL_ERROR) { Tcl_Obj *codePtr = Tcl_NewIntObj(code); Tcl_ResetResult(interp); Tcl_AppendResult(interp, "attempt to provide package ", name, " ", versionToProvide, " failed: ", "bad return code: ", Tcl_GetString(codePtr), NULL); Tcl_DecrRefCount(codePtr); code = TCL_ERROR; } if (code == TCL_ERROR) { TclFormatToErrorInfo(interp, "\n (\"package ifneeded %s %s\" script)", name, versionToProvide); } Tcl_Release((ClientData) versionToProvide); if (code != TCL_OK) { /* * Take a non-TCL_OK code from the script as an * indication the package wasn't loaded properly, * so the package system should not remember an * improper load. * * This is consistent with our returning NULL. * If we're not willing to tell our caller we * got a particular version, we shouldn't store * that version for telling future callers either. */ if (pkgPtr->version != NULL) { ckfree(pkgPtr->version); pkgPtr->version = NULL; } pkgPtr->clientData = NULL; return TCL_ERROR; } break; } /* * The package is not in the database. If there is a "package unknown" * command, invoke it (but only on the first pass; after that, we * should not get here in the first place). */ if (pass > 1) { break; } script = ((Interp *) interp)->packageUnknown; if (script != NULL) { Tcl_DStringInit(&command); Tcl_DStringAppend(&command, script, -1); Tcl_DStringAppendElement(&command, name); AddRequirementsToDString(&command, reqc, reqv); code = Tcl_EvalEx(interp, Tcl_DStringValue(&command), Tcl_DStringLength(&command), TCL_EVAL_GLOBAL); Tcl_DStringFree(&command); if ((code != TCL_OK) && (code != TCL_ERROR)) { Tcl_Obj *codePtr = Tcl_NewIntObj(code); Tcl_ResetResult(interp); Tcl_AppendResult(interp, "bad return code: ", Tcl_GetString(codePtr), NULL); Tcl_DecrRefCount(codePtr); code = TCL_ERROR; } if (code == TCL_ERROR) { Tcl_AddErrorInfo(interp, "\n (\"package unknown\" script)"); return TCL_ERROR; } Tcl_ResetResult(interp); } } if (pkgPtr->version == NULL) { Tcl_AppendResult(interp, "can't find package ", name, NULL); AddRequirementsToResult(interp, reqc, reqv); return TCL_ERROR; } /* * At this point we know that the package is present. Make sure that the * provided version meets the current requirements. */ if (reqc == 0) { satisfies = 1; } else { CheckVersionAndConvert (interp, pkgPtr->version, &pkgVersionI, NULL); satisfies = AllRequirementsSatisfied (pkgVersionI, reqc, reqv); Tcl_Free (pkgVersionI); } if (satisfies) { if (clientDataPtr) { *clientDataPtr = pkgPtr->clientData; } Tcl_SetObjResult (interp, Tcl_NewStringObj (pkgPtr->version, -1)); return TCL_OK; } Tcl_AppendResult(interp, "version conflict for package \"", name, "\": have ", pkgPtr->version, ", need", NULL); AddRequirementsToResult (interp, reqc, reqv); return TCL_ERROR; } /* *---------------------------------------------------------------------- * * Tcl_PkgPresent / Tcl_PkgPresentEx -- * * Checks to see whether the specified package is present. If it is not * then no additional action is taken. * * Results: * If successful, returns the version string for the currently provided * version of the package, which may be different from the "version" * argument. If the caller's requirements cannot be met (e.g. the version * requested conflicts with a currently provided version), NULL is * returned and an error message is left in interp->result. * * Side effects: * None. * *---------------------------------------------------------------------- */ CONST char * Tcl_PkgPresent( Tcl_Interp *interp, /* Interpreter in which package is now * available. */ CONST char *name, /* Name of desired package. */ CONST char *version, /* Version string for desired version; NULL * means use the latest version available. */ int exact) /* Non-zero means that only the particular * version given is acceptable. Zero means use * the latest compatible version. */ { return Tcl_PkgPresentEx(interp, name, version, exact, NULL); } CONST char * Tcl_PkgPresentEx( Tcl_Interp *interp, /* Interpreter in which package is now * available. */ CONST char *name, /* Name of desired package. */ CONST char *version, /* Version string for desired version; NULL * means use the latest version available. */ int exact, /* Non-zero means that only the particular * version given is acceptable. Zero means use * the latest compatible version. */ ClientData *clientDataPtr) /* Used to return the client data for this * package. If it is NULL then the client data * is not returned. This is unchanged if this * call fails for any reason. */ { Interp *iPtr = (Interp *) interp; Tcl_HashEntry *hPtr; Package *pkgPtr; int satisfies, result; hPtr = Tcl_FindHashEntry(&iPtr->packageTable, name); if (hPtr) { pkgPtr = (Package *) Tcl_GetHashValue(hPtr); if (pkgPtr->version != NULL) { char* pvi; char* vi; int thisIsMajor; /* * At this point we know that the package is present. Make sure * that the provided version meets the current requirement. */ if (version == NULL) { if (clientDataPtr) { *clientDataPtr = pkgPtr->clientData; } return pkgPtr->version; } if (CheckVersionAndConvert (interp, pkgPtr->version, &pvi, NULL) != TCL_OK) { return NULL; } else if (CheckVersionAndConvert (interp, version, &vi, NULL) != TCL_OK) { Tcl_Free (pvi); return NULL; } result = CompareVersions(pvi, vi, &thisIsMajor); Tcl_Free (pvi); Tcl_Free (vi); satisfies = (result == 0) || ((result == 1) && !thisIsMajor); if ((satisfies && !exact) || (result == 0)) { if (clientDataPtr) { *clientDataPtr = pkgPtr->clientData; } return pkgPtr->version; } Tcl_AppendResult(interp, "version conflict for package \"", name, "\": have ", pkgPtr->version, ", need ", version, NULL); return NULL; } } if (version != NULL) { Tcl_AppendResult(interp, "package ", name, " ", version, " is not present", NULL); } else { Tcl_AppendResult(interp, "package ", name, " is not present", NULL); } return NULL; } /* *---------------------------------------------------------------------- * * Tcl_PackageObjCmd -- * * This function is invoked to process the "package" Tcl command. See the * user documentation for details on what it does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_PackageObjCmd( ClientData dummy, /* Not used. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { static CONST char *pkgOptions[] = { "forget", "ifneeded", "names", "prefer", "present", "provide", "require", "unknown", "vcompare", "versions", "vsatisfies", NULL }; enum pkgOptions { PKG_FORGET, PKG_IFNEEDED, PKG_NAMES, PKG_PREFER, PKG_PRESENT, PKG_PROVIDE, PKG_REQUIRE, PKG_UNKNOWN, PKG_VCOMPARE, PKG_VERSIONS, PKG_VSATISFIES }; Interp *iPtr = (Interp *) interp; int optionIndex, exact, i, satisfies; PkgAvail *availPtr, *prevPtr; Package *pkgPtr; Tcl_HashEntry *hPtr; Tcl_HashSearch search; Tcl_HashTable *tablePtr; CONST char *version; char *argv2, *argv3, *argv4; char* iva = NULL; char* ivb = NULL; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[1], pkgOptions, "option", 0, &optionIndex) != TCL_OK) { return TCL_ERROR; } switch ((enum pkgOptions) optionIndex) { case PKG_FORGET: { char *keyString; for (i = 2; i < objc; i++) { keyString = Tcl_GetString(objv[i]); hPtr = Tcl_FindHashEntry(&iPtr->packageTable, keyString); if (hPtr == NULL) { continue; } pkgPtr = (Package *) Tcl_GetHashValue(hPtr); Tcl_DeleteHashEntry(hPtr); if (pkgPtr->version != NULL) { ckfree(pkgPtr->version); } while (pkgPtr->availPtr != NULL) { availPtr = pkgPtr->availPtr; pkgPtr->availPtr = availPtr->nextPtr; Tcl_EventuallyFree((ClientData)availPtr->version, TCL_DYNAMIC); Tcl_EventuallyFree((ClientData)availPtr->script, TCL_DYNAMIC); ckfree((char *) availPtr); } ckfree((char *) pkgPtr); } break; } case PKG_IFNEEDED: { int length; char* argv3i; char* avi; int res; if ((objc != 4) && (objc != 5)) { Tcl_WrongNumArgs(interp, 2, objv, "package version ?script?"); return TCL_ERROR; } argv3 = Tcl_GetString(objv[3]); if (CheckVersionAndConvert(interp, argv3, &argv3i, NULL) != TCL_OK) { return TCL_ERROR; } argv2 = Tcl_GetString(objv[2]); if (objc == 4) { hPtr = Tcl_FindHashEntry(&iPtr->packageTable, argv2); if (hPtr == NULL) { Tcl_Free (argv3i); return TCL_OK; } pkgPtr = (Package *) Tcl_GetHashValue(hPtr); } else { pkgPtr = FindPackage(interp, argv2); } argv3 = Tcl_GetStringFromObj(objv[3], &length); for (availPtr = pkgPtr->availPtr, prevPtr = NULL; availPtr != NULL; prevPtr = availPtr, availPtr = availPtr->nextPtr) { if (CheckVersionAndConvert (interp, availPtr->version, &avi, NULL) != TCL_OK) { Tcl_Free (argv3i); return TCL_ERROR; } res = CompareVersions(avi, argv3i, NULL); Tcl_Free (avi); if (res == 0){ if (objc == 4) { Tcl_Free (argv3i); Tcl_SetResult(interp, availPtr->script, TCL_VOLATILE); return TCL_OK; } Tcl_EventuallyFree((ClientData)availPtr->script, TCL_DYNAMIC); break; } } Tcl_Free (argv3i); if (objc == 4) { return TCL_OK; } if (availPtr == NULL) { availPtr = (PkgAvail *) ckalloc(sizeof(PkgAvail)); availPtr->version = ckalloc((unsigned) (length + 1)); strcpy(availPtr->version, argv3); if (prevPtr == NULL) { availPtr->nextPtr = pkgPtr->availPtr; pkgPtr->availPtr = availPtr; } else { availPtr->nextPtr = prevPtr->nextPtr; prevPtr->nextPtr = availPtr; } } argv4 = Tcl_GetStringFromObj(objv[4], &length); availPtr->script = ckalloc((unsigned) (length + 1)); strcpy(availPtr->script, argv4); break; } case PKG_NAMES: if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } tablePtr = &iPtr->packageTable; for (hPtr = Tcl_FirstHashEntry(tablePtr, &search); hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { pkgPtr = (Package *) Tcl_GetHashValue(hPtr); if ((pkgPtr->version != NULL) || (pkgPtr->availPtr != NULL)) { Tcl_AppendElement(interp, Tcl_GetHashKey(tablePtr, hPtr)); } } break; case PKG_PRESENT: if (objc < 3) { presentSyntax: Tcl_WrongNumArgs(interp, 2, objv, "?-exact? package ?version?"); return TCL_ERROR; } argv2 = Tcl_GetString(objv[2]); if ((argv2[0] == '-') && (strcmp(argv2, "-exact") == 0)) { exact = 1; } else { exact = 0; } version = NULL; if (objc == (4 + exact)) { version = Tcl_GetString(objv[3 + exact]); if (CheckVersionAndConvert(interp, version, NULL, NULL) != TCL_OK) { return TCL_ERROR; } } else if ((objc != 3) || exact) { goto presentSyntax; } if (exact) { argv3 = Tcl_GetString(objv[3]); version = Tcl_PkgPresent(interp, argv3, version, exact); } else { version = Tcl_PkgPresent(interp, argv2, version, exact); } if (version == NULL) { return TCL_ERROR; } Tcl_SetObjResult( interp, Tcl_NewStringObj( version, -1 ) ); break; case PKG_PROVIDE: if ((objc != 3) && (objc != 4)) { Tcl_WrongNumArgs(interp, 2, objv, "package ?version?"); return TCL_ERROR; } argv2 = Tcl_GetString(objv[2]); if (objc == 3) { hPtr = Tcl_FindHashEntry(&iPtr->packageTable, argv2); if (hPtr != NULL) { pkgPtr = (Package *) Tcl_GetHashValue(hPtr); if (pkgPtr->version != NULL) { Tcl_SetResult(interp, pkgPtr->version, TCL_VOLATILE); } } return TCL_OK; } argv3 = Tcl_GetString(objv[3]); if (CheckVersionAndConvert(interp, argv3, NULL, NULL) != TCL_OK) { return TCL_ERROR; } return Tcl_PkgProvide(interp, argv2, argv3); case PKG_REQUIRE: if (objc < 3) { requireSyntax: Tcl_WrongNumArgs(interp, 2, objv, "?-exact? package ?requirement...?"); return TCL_ERROR; } version = NULL; argv2 = Tcl_GetString(objv[2]); if ((argv2[0] == '-') && (strcmp(argv2, "-exact") == 0)) { Tcl_Obj* ov; int res; if (objc != 5) { goto requireSyntax; } version = Tcl_GetString(objv[4]); if (CheckVersionAndConvert(interp, version, NULL, NULL) != TCL_OK) { return TCL_ERROR; } /* Create a new-style requirement for the exact version. */ ov = ExactRequirement (version); version = NULL; argv3 = Tcl_GetString(objv[3]); Tcl_IncrRefCount (ov); res = Tcl_PkgRequireProc(interp, argv3, 1, &ov, NULL); Tcl_DecrRefCount (ov); return res; } else { if (CheckAllRequirements (interp, objc-3, objv+3) != TCL_OK) { return TCL_ERROR; } return Tcl_PkgRequireProc(interp, argv2, objc-3, objv+3, NULL); } break; case PKG_UNKNOWN: { int length; if (objc == 2) { if (iPtr->packageUnknown != NULL) { Tcl_SetResult(interp, iPtr->packageUnknown, TCL_VOLATILE); } } else if (objc == 3) { if (iPtr->packageUnknown != NULL) { ckfree(iPtr->packageUnknown); } argv2 = Tcl_GetStringFromObj(objv[2], &length); if (argv2[0] == 0) { iPtr->packageUnknown = NULL; } else { iPtr->packageUnknown = (char *) ckalloc((unsigned) (length+1)); strcpy(iPtr->packageUnknown, argv2); } } else { Tcl_WrongNumArgs(interp, 2, objv, "?command?"); return TCL_ERROR; } break; } case PKG_PREFER: { /* See tclInt.h for the enum, just before Interp */ static CONST char *pkgPreferOptions[] = { "latest", "stable", NULL }; if (objc > 3) { Tcl_WrongNumArgs(interp, 2, objv, "?latest|stable?"); return TCL_ERROR; } if (objc == 3) { /* Set value. */ int new; if (Tcl_GetIndexFromObj(interp, objv[2], pkgPreferOptions, "preference", 0, &new) != TCL_OK) { return TCL_ERROR; } if (new < iPtr->packagePrefer) { iPtr->packagePrefer = new; } } /* Always return current value. */ Tcl_SetObjResult(interp, Tcl_NewStringObj (pkgPreferOptions [iPtr->packagePrefer], -1)); break; } case PKG_VCOMPARE: if (objc != 4) { Tcl_WrongNumArgs(interp, 2, objv, "version1 version2"); return TCL_ERROR; } argv3 = Tcl_GetString(objv[3]); argv2 = Tcl_GetString(objv[2]); if ((CheckVersionAndConvert (interp, argv2, &iva, NULL) != TCL_OK) || (CheckVersionAndConvert (interp, argv3, &ivb, NULL) != TCL_OK)) { if (iva != NULL) { Tcl_Free (iva); } /* ivb cannot be set in this branch */ return TCL_ERROR; } /* Comparison is done on the internal representation */ Tcl_SetObjResult(interp,Tcl_NewIntObj(CompareVersions(iva, ivb, NULL))); Tcl_Free (iva); Tcl_Free (ivb); break; case PKG_VERSIONS: if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "package"); return TCL_ERROR; } argv2 = Tcl_GetString(objv[2]); hPtr = Tcl_FindHashEntry(&iPtr->packageTable, argv2); if (hPtr != NULL) { pkgPtr = (Package *) Tcl_GetHashValue(hPtr); for (availPtr = pkgPtr->availPtr; availPtr != NULL; availPtr = availPtr->nextPtr) { Tcl_AppendElement(interp, availPtr->version); } } break; case PKG_VSATISFIES: { char* argv2i = NULL; if (objc < 4) { Tcl_WrongNumArgs(interp, 2, objv, "version requirement requirement..."); return TCL_ERROR; } argv2 = Tcl_GetString(objv[2]); if ((CheckVersionAndConvert(interp, argv2, &argv2i, NULL) != TCL_OK)) { return TCL_ERROR; } else if (CheckAllRequirements (interp, objc-3, objv+3) != TCL_OK) { Tcl_Free (argv2i); return TCL_ERROR; } satisfies = AllRequirementsSatisfied (argv2i, objc-3, objv+3); Tcl_Free (argv2i); Tcl_SetObjResult(interp, Tcl_NewBooleanObj(satisfies)); break; } default: Tcl_Panic("Tcl_PackageObjCmd: bad option index to pkgOptions"); } return TCL_OK; } /* *---------------------------------------------------------------------- * * FindPackage -- * * This function finds the Package record for a particular package in a * particular interpreter, creating a record if one doesn't already * exist. * * Results: * The return value is a pointer to the Package record for the package. * * Side effects: * A new Package record may be created. * *---------------------------------------------------------------------- */ static Package * FindPackage( Tcl_Interp *interp, /* Interpreter to use for package lookup. */ CONST char *name) /* Name of package to fine. */ { Interp *iPtr = (Interp *) interp; Tcl_HashEntry *hPtr; int new; Package *pkgPtr; hPtr = Tcl_CreateHashEntry(&iPtr->packageTable, name, &new); if (new) { pkgPtr = (Package *) ckalloc(sizeof(Package)); pkgPtr->version = NULL; pkgPtr->availPtr = NULL; pkgPtr->clientData = NULL; Tcl_SetHashValue(hPtr, pkgPtr); } else { pkgPtr = (Package *) Tcl_GetHashValue(hPtr); } return pkgPtr; } /* *---------------------------------------------------------------------- * * TclFreePackageInfo -- * * This function is called during interpreter deletion to free all of the * package-related information for the interpreter. * * Results: * None. * * Side effects: * Memory is freed. * *---------------------------------------------------------------------- */ void TclFreePackageInfo( Interp *iPtr) /* Interpereter that is being deleted. */ { Package *pkgPtr; Tcl_HashSearch search; Tcl_HashEntry *hPtr; PkgAvail *availPtr; for (hPtr = Tcl_FirstHashEntry(&iPtr->packageTable, &search); hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { pkgPtr = (Package *) Tcl_GetHashValue(hPtr); if (pkgPtr->version != NULL) { ckfree(pkgPtr->version); } while (pkgPtr->availPtr != NULL) { availPtr = pkgPtr->availPtr; pkgPtr->availPtr = availPtr->nextPtr; Tcl_EventuallyFree((ClientData)availPtr->version, TCL_DYNAMIC); Tcl_EventuallyFree((ClientData)availPtr->script, TCL_DYNAMIC); ckfree((char *) availPtr); } ckfree((char *) pkgPtr); } Tcl_DeleteHashTable(&iPtr->packageTable); if (iPtr->packageUnknown != NULL) { ckfree(iPtr->packageUnknown); } } /* *---------------------------------------------------------------------- * * CheckVersionAndConvert -- * * This function checks to see whether a version number has valid * syntax. It also generates a semi-internal representation (string * rep of a list of numbers). * * Results: * If string is a properly formed version number the TCL_OK is returned. * Otherwise TCL_ERROR is returned and an error message is left in the * interp's result. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int CheckVersionAndConvert( Tcl_Interp *interp, /* Used for error reporting. */ CONST char *string, /* Supposedly a version number, which is * groups of decimal digits separated by * dots. */ char** internal, /* Internal normalized representation */ int* stable) /* Flag: Version is (un)stable. */ { CONST char *p = string; char prevChar; int hasunstable = 0; /* 4* assuming that each char is a separator (a,b become ' -x '). * 4+ to have spce for an additional -2 at the end */ char* ibuf = Tcl_Alloc (4+4*strlen(string)); char* ip = ibuf; /* Basic rules * (1) First character has to be a digit. * (2) All other characters have to be a digit or '.' * (3) Two '.'s may not follow each other. * TIP 268, Modified rules * (1) s.a. * (2) All other characters have to be a digit, 'a', 'b', or '.' * (3) s.a. * (4) Only one of 'a' or 'b' may occur. * (5) Neither 'a', nor 'b' may occur before or after a '.' */ if (!isdigit(UCHAR(*p))) { /* INTL: digit */ goto error; } *ip++ = *p; for (prevChar = *p, p++; *p != 0; p++) { if ( (!isdigit(UCHAR(*p))) && (((*p != '.') && (*p != 'a') && (*p != 'b')) || ((hasunstable && ((*p == 'a') || (*p == 'b'))) || (((prevChar == 'a') || (prevChar == 'b') || (prevChar == '.')) && (*p == '.')) || (((*p == 'a') || (*p == 'b') || (*p == '.')) && (prevChar == '.')))) ) { /* INTL: digit */ goto error; } if ((*p == 'a') || (*p == 'b')) { hasunstable = 1 ; } /* Translation to the internal rep. Regular version chars are copied * as is. The separators are translated to numerics. The new separator * for all parts is space. */ if (*p == '.') { *ip++ = ' '; *ip++ = '0'; *ip++ = ' '; } else if (*p == 'a') { *ip++ = ' '; *ip++ = '-'; *ip++ = '2'; *ip++ = ' '; } else if (*p == 'b') { *ip++ = ' '; *ip++ = '-'; *ip++ = '1'; *ip++ = ' '; } else { *ip++ = *p; } prevChar = *p; } if ((prevChar != '.') && (prevChar != 'a') && (prevChar != 'b')) { *ip = '\0'; if (internal != NULL) { *internal = ibuf; } else { Tcl_Free (ibuf); } if (stable != NULL) { *stable = !hasunstable; } return TCL_OK; } error: Tcl_Free (ibuf); Tcl_AppendResult(interp, "expected version number but got \"", string, "\"", NULL); return TCL_ERROR; } /* *---------------------------------------------------------------------- * * CompareVersions -- * * This function compares two version numbers (in internal rep). * * Results: * The return value is -1 if v1 is less than v2, 0 if the two version * numbers are the same, and 1 if v1 is greater than v2. If *satPtr is * non-NULL, the word it points to is filled in with 1 if v2 >= v1 and * both numbers have the same major number or 0 otherwise. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int CompareVersions( char *v1, /* Versions strings, of form 2.1.3 (any number */ char *v2, /* of version numbers). */ int *isMajorPtr) /* If non-null, the word pointed to is filled * in with a 0/1 value. 1 means that the difference * occured in the first element. */ { int thisIsMajor; int res, flip; char* s1, *e1, *s2, *e2, o1, o2; /* * Each iteration of the following loop processes one number from each * string, terminated by a " " (space). If those numbers don't match then the * comparison is over; otherwise, we loop back for the next number. * * TIP 268. * This is identical the function 'ComparePkgVersion', but using the new * space separator as used by the internal rep of version numbers. The * special separators 'a' and 'b' have already been dealt with in * 'CheckVersionAndConvert', they were translated into numbers as * well. This keeps the comparison sane. Otherwise we would have to * compare numerics, the separators, and also deal with the special case * of end-of-string compared to separators. The semi-list rep we get here * is much easier to handle, as it is still regular. * * Rewritten to not compute a numeric value for the extracted version * number, but do string comparison. Skip any leading zeros for that to * work. This change breaks through the 32bit-limit on version numbers. */ thisIsMajor = 1; s1 = v1; s2 = v2; while (1) { /* * Parse one decimal number from the front of each string. * Skip leading zeros. Terminate found number for upcoming * string-wise comparison, if needed. */ while ((*s1 != 0) && (*s1 == '0')) { s1 ++; } while ((*s2 != 0) && (*s2 == '0')) { s2 ++; } /* * s1, s2 now point to the beginnings of the numbers to compare. Test * for their signs first, as shortcut to the result (different signs), * or determines if result has to be flipped (both negative). If there * is no shortcut we have to insert terminators later to limit the * strcmp. */ if ((*s1 == '-') && (*s2 != '-')) { /* s1 < 0, s2 >= 0 => s1 < s2 */ res = -1; break; } if ((*s1 != '-') && (*s2 == '-')) { /* s1 >= 0, s2 < 0 => s1 > s2 */ res = 1; break; } if ((*s1 == '-') && (*s2 == '-')) { /* a < b => -a > -b, etc. */ s1 ++; s2 ++; flip = 1; } else { flip = 0; } /* * The string comparison is needed, so now we determine where the * numbers end. */ e1 = s1; while ((*e1 != 0) && (*e1 != ' ')) { e1 ++; } e2 = s2; while ((*e2 != 0) && (*e2 != ' ')) { e2 ++; } /* * s1 .. e1 and s2 .. e2 now bracket the numbers to compare. Insert * terminators, compare, and restore actual contents. First however * another shortcut. Compare lengths. Shorter string is smaller * number! Thus we strcmp only strings of identical length. */ if ((e1-s1) < (e2-s2)) { res = -1; } else if ((e2-s2) < (e1-s1)) { res = 1; } else { o1 = *e1 ; *e1 = '\0'; o2 = *e2 ; *e2 = '\0'; res = strcmp (s1, s2); res = (res < 0) ? -1 : (res ? 1 : 0); *e1 = o1; *e2 = o2; } /* * Stop comparing segments when a difference has been found. Here we * may have to flip the result to account for signs. */ if (res != 0) { if (flip) res = -res; break; } /* * Go on to the next version number if the current numbers match. * However stop processing if the end of both numbers has been * reached. */ s1 = e1; s2 = e2; if (*s1 != 0) { s1++; } else if (*s2 == 0) { /* s1, s2 both at the end => identical */ res = 0; break; } if (*s2 != 0) { s2++; } thisIsMajor = 0; } if (isMajorPtr != NULL) { *isMajorPtr = thisIsMajor; } return res; } /* *---------------------------------------------------------------------- * * CheckAllRequirements -- * * This function checks to see whether all requirements in a set * have valid syntax. * * Results: * TCL_OK is returned if all requirements are valid. * Otherwise TCL_ERROR is returned and an error message * is left in the interp's result. * * Side effects: * May modify the interpreter result. * *---------------------------------------------------------------------- */ static int CheckAllRequirements( Tcl_Interp* interp, int reqc, /* Requirements to check. */ Tcl_Obj *CONST reqv[]) { int i; for (i = 0; i < reqc; i++) { if ((CheckRequirement(interp, Tcl_GetString(reqv[i])) != TCL_OK)) { return TCL_ERROR; } } return TCL_OK; } /* *---------------------------------------------------------------------- * * CheckRequirement -- * * This function checks to see whether a requirement has valid syntax. * * Results: * If string is a properly formed requirement then TCL_OK is returned. * Otherwise TCL_ERROR is returned and an error message is left in the * interp's result. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int CheckRequirement( Tcl_Interp *interp, /* Used for error reporting. */ CONST char *string) /* Supposedly a requirement. */ { /* Syntax of requirement = version * = version-version * = version- */ char* dash = NULL; char* buf; dash = strchr (string, '-'); if (dash == NULL) { /* no dash found, has to be a simple version */ return CheckVersionAndConvert (interp, string, NULL, NULL); } if (strchr (dash+1, '-') != NULL) { /* More dashes found after the first. This is wrong. */ Tcl_AppendResult(interp, "expected versionMin-versionMax but got \"", string, "\"", NULL); return TCL_ERROR; } /* Exactly one dash is present. Copy the string, split at the location of * dash and check that both parts are versions. Note that the max part can * be empty. */ buf = strdup (string); dash = buf + (dash - string); *dash = '\0'; /* buf now <=> min part */ dash ++; /* dash now <=> max part */ if ((CheckVersionAndConvert(interp, buf, NULL, NULL) != TCL_OK) || ((*dash != '\0') && (CheckVersionAndConvert(interp, dash, NULL, NULL) != TCL_OK))) { free (buf); return TCL_ERROR; } free (buf); return TCL_OK; } /* *---------------------------------------------------------------------- * * AddRequirementsToResult -- * * This function accumulates requirements in the interpreter result. * * Results: * None. * * Side effects: * The interpreter result is extended. * *---------------------------------------------------------------------- */ static void AddRequirementsToResult( Tcl_Interp* interp, int reqc, /* Requirements constraining the desired version. */ Tcl_Obj *CONST reqv[]) /* 0 means to use the latest version available. */ { if (reqc > 0) { int i; for (i = 0; i < reqc; i++) { Tcl_AppendResult(interp, " ", TclGetString(reqv[i]), NULL); } } } /* *---------------------------------------------------------------------- * * AddRequirementsToDString -- * * This function accumulates requirements in a DString. * * Results: * None. * * Side effects: * The DString argument is extended. * *---------------------------------------------------------------------- */ static void AddRequirementsToDString( Tcl_DString* dstring, int reqc, /* Requirements constraining the desired version. */ Tcl_Obj *CONST reqv[]) /* 0 means to use the latest version available. */ { if (reqc > 0) { int i; for (i = 0; i < reqc; i++) { Tcl_DStringAppend(dstring, " ", 1); Tcl_DStringAppend(dstring, TclGetString(reqv[i]), -1); } } } /* *---------------------------------------------------------------------- * * AllRequirementSatisfied -- * * This function checks to see whether a version satisfies at * least one of a set of requirements. * * Results: * If the requirements are satisfied 1 is returned. * Otherwise 0 is returned. The function assumes * that all pieces have valid syntax. And is allowed * to make that assumption. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int AllRequirementsSatisfied( char* availVersionI, /* Candidate version to check against the requirements */ int reqc, /* Requirements constraining the desired version. */ Tcl_Obj *CONST reqv[]) /* 0 means to use the latest version available. */ { int i, satisfies; for (satisfies = i = 0; i < reqc; i++) { satisfies = RequirementSatisfied(availVersionI, Tcl_GetString(reqv[i])); if (satisfies) break; } return satisfies; } /* *---------------------------------------------------------------------- * * RequirementSatisfied -- * * This function checks to see whether a version satisfies a requirement. * * Results: * If the requirement is satisfied 1 is returned. * Otherwise 0 is returned. The function assumes * that all pieces have valid syntax. And is allowed * to make that assumption. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int RequirementSatisfied( char *havei, /* Version string, of candidate package we have */ CONST char *req) /* Requirement string the candidate has to satisfy */ { /* The have candidate is already in internal rep. */ int satisfied, res; char* dash = NULL; char* buf, *min, *max; dash = strchr (req, '-'); if (dash == NULL) { /* No dash found, is a simple version, fallback to regular check. * The 'CheckVersionAndConvert' cannot fail. We pad the requirement with * 'a0', i.e '-2' before doing the comparison to properly accept * unstables as well. */ char* reqi = NULL; int thisIsMajor; CheckVersionAndConvert (NULL, req, &reqi, NULL); strcat (reqi, " -2"); res = CompareVersions(havei, reqi, &thisIsMajor); satisfied = (res == 0) || ((res == 1) && !thisIsMajor); Tcl_Free (reqi); return satisfied; } /* Exactly one dash is present (Assumption of valid syntax). Copy the req, * split at the location of dash and check that both parts are * versions. Note that the max part can be empty. */ buf = strdup (req); dash = buf + (dash - req); *dash = '\0'; /* buf now <=> min part */ dash ++; /* dash now <=> max part */ if (*dash == '\0') { /* We have a min, but no max. For the comparison we generate the * internal rep, padded with 'a0' i.e. '-2'. */ /* No max part, unbound */ CheckVersionAndConvert (NULL, buf, &min, NULL); strcat (min, " -2"); satisfied = (CompareVersions(havei, min, NULL) >= 0); Tcl_Free (min); free (buf); return satisfied; } /* We have both min and max, and generate their internal reps. * When identical we compare as is, otherwise we pad with 'a0' * to ove the range a bit. */ CheckVersionAndConvert (NULL, buf, &min, NULL); CheckVersionAndConvert (NULL, dash, &max, NULL); if (CompareVersions(min, max, NULL) == 0) { satisfied = (CompareVersions(min, havei, NULL) == 0); } else { strcat (min, " -2"); strcat (max, " -2"); satisfied = ((CompareVersions(min, havei, NULL) <= 0) && (CompareVersions(havei, max, NULL) < 0)); } Tcl_Free (min); Tcl_Free (max); free (buf); return satisfied; } /* *---------------------------------------------------------------------- * * ExactRequirement -- * * This function is the core for the translation of -exact requests. * It translates the request of the version into a range of versions. * The translation was chosen for backwards compatibility. * * Results: * A Tcl_Obj containing the version range as string. * * Side effects: * None. * *---------------------------------------------------------------------- */ static Tcl_Obj* ExactRequirement(version) CONST char* version; { /* A -exact request for a version X.y is translated into the range * X.y-X.(y+1). For example -exact 8.4 means the range "8.4-8.5". * * This translation was chosen to prevent packages which currently use a * 'package require -exact tclversion' from being affected by the core now * registering itself as 8.4.x (patchlevel) instead of 8.4 * (version). Examples are tbcload, compiler, and ITcl. * * Translating -exact 8.4 to the range "8.4-8.4" instead would require us * and everyone else to rebuild these packages to require -exact 8.4.14, * or whatever the exact current patchlevel is. A backward compatibility * issue with effects similar to the bugfix made in 8.5 now requiring * ifneeded and provided versions to match. Instead we have chosen to * interpret exactness to not be exactly equal, but to be exact only * within the specified level, and allowing variation in the deeper * level. More examples: * * -exact 8 => "8-9" * -exact 8.4 => "8.4-8.5" * -exact 8.4.14 => "8.4.14-8.4.15" * -exact 8.0a2 => "8.0a2-8.0a3" */ char* iv; int lc, i; CONST char** lv; char buf [30]; Tcl_Obj* o = Tcl_NewStringObj (version,-1); Tcl_AppendStringsToObj (o, "-", NULL); /* Assuming valid syntax here */ CheckVersionAndConvert (NULL, version, &iv, NULL); /* Split the list into components */ Tcl_SplitList (NULL, iv, &lc, &lv); /* Iterate over the components and make them parts of the result. Except * for the last, which is handled separately, to allow the * incrementation. */ for (i=0; i < (lc-1); i++) { /* Regular component */ Tcl_AppendStringsToObj (o, lv[i], NULL); /* Separator component */ i ++; if (0 == strcmp ("-1", lv[i])) { Tcl_AppendStringsToObj (o, "b", NULL); } else if (0 == strcmp ("-2", lv[i])) { Tcl_AppendStringsToObj (o, "a", NULL); } else { Tcl_AppendStringsToObj (o, ".", NULL); } } /* Regular component, last */ sprintf (buf, "%d", atoi (lv [lc-1]) + 1); Tcl_AppendStringsToObj (o, buf, NULL); ckfree ((char*) lv); return o; } /* *---------------------------------------------------------------------- * * VersionCleanupProc -- * * This function is called to delete the last remember package version * string for an interpreter when the interpreter is deleted. It gets * invoked via the Tcl AssocData mechanism. * * Results: * None. * * Side effects: * Storage for the version object for interp get deleted. * *---------------------------------------------------------------------- */ static void VersionCleanupProc ( ClientData clientData, /* Pointer to remembered version string object * for interp. */ Tcl_Interp *interp) /* Interpreter that is being deleted. */ { Tcl_Obj* ov = (Tcl_Obj*) clientData; if (ov != NULL) { Tcl_DecrRefCount (ov); } } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */