#include "tclInt.h"
typedef struct PkgAvail {
char *version;
char *script;
struct PkgAvail *nextPtr;
} PkgAvail;
typedef struct Package {
char *version;
PkgAvail *availPtr;
ClientData clientData;
} Package;
static int CheckVersion _ANSI_ARGS_((Tcl_Interp *interp,
CONST char *string));
static int ComparePkgVersions _ANSI_ARGS_((CONST char *v1,
CONST char *v2,
int *satPtr));
static Package * FindPackage _ANSI_ARGS_((Tcl_Interp *interp,
CONST char *name));
int
Tcl_PkgProvide(interp, name, version)
Tcl_Interp *interp;
CONST char *name;
CONST char *version;
{
return Tcl_PkgProvideEx(interp, name, version, (ClientData) NULL);
}
int
Tcl_PkgProvideEx(interp, name, version, clientData)
Tcl_Interp *interp;
CONST char *name;
CONST char *version;
ClientData clientData;
{
Package *pkgPtr;
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 (ComparePkgVersions(pkgPtr->version, version, (int *) NULL) == 0) {
if (clientData != NULL) {
pkgPtr->clientData = clientData;
}
return TCL_OK;
}
Tcl_AppendResult(interp, "conflicting versions provided for package \"",
name, "\": ", pkgPtr->version, ", then ", version, (char *) NULL);
return TCL_ERROR;
}
CONST char *
Tcl_PkgRequire(interp, name, version, exact)
Tcl_Interp *interp;
CONST char *name;
CONST char *version;
int exact;
{
return Tcl_PkgRequireEx(interp, name, version, exact, (ClientData *) NULL);
}
CONST char *
Tcl_PkgRequireEx(interp, name, version, exact, clientDataPtr)
Tcl_Interp *interp;
CONST char *name;
CONST char *version;
int exact;
ClientData *clientDataPtr;
{
Package *pkgPtr;
PkgAvail *availPtr, *bestPtr;
char *script;
int code, satisfies, result, pass;
Tcl_DString command;
if (tclEmptyStringRep == NULL) {
tclEmptyStringRep = &tclEmptyString;
Tcl_AppendResult(interp, "Cannot load package \"", name,
"\" in standalone executable: This package is not ",
"compiled with stub support", NULL);
return NULL;
}
for (pass = 1; ; pass++) {
pkgPtr = FindPackage(interp, name);
if (pkgPtr->version != NULL) {
break;
}
bestPtr = NULL;
for (availPtr = pkgPtr->availPtr; availPtr != NULL;
availPtr = availPtr->nextPtr) {
if ((bestPtr != NULL) && (ComparePkgVersions(availPtr->version,
bestPtr->version, (int *) NULL) <= 0)) {
continue;
}
if (version != NULL) {
result = ComparePkgVersions(availPtr->version, version,
&satisfies);
if ((result != 0) && exact) {
continue;
}
if (!satisfies) {
continue;
}
}
bestPtr = availPtr;
}
if (bestPtr != NULL) {
script = bestPtr->script;
Tcl_Preserve((ClientData) script);
code = Tcl_GlobalEval(interp, script);
Tcl_Release((ClientData) script);
if (code != TCL_OK) {
if (code == TCL_ERROR) {
Tcl_AddErrorInfo(interp,
"\n (\"package ifneeded\" script)");
}
return NULL;
}
Tcl_ResetResult(interp);
pkgPtr = FindPackage(interp, name);
break;
}
if (pass > 1) {
break;
}
script = ((Interp *) interp)->packageUnknown;
if (script != NULL) {
Tcl_DStringInit(&command);
Tcl_DStringAppend(&command, script, -1);
Tcl_DStringAppendElement(&command, name);
Tcl_DStringAppend(&command, " ", 1);
Tcl_DStringAppend(&command, (version != NULL) ? version : "{}",
-1);
if (exact) {
Tcl_DStringAppend(&command, " -exact", 7);
}
code = Tcl_GlobalEval(interp, Tcl_DStringValue(&command));
Tcl_DStringFree(&command);
if (code != TCL_OK) {
if (code == TCL_ERROR) {
Tcl_AddErrorInfo(interp,
"\n (\"package unknown\" script)");
}
return NULL;
}
Tcl_ResetResult(interp);
}
}
if (pkgPtr->version == NULL) {
Tcl_AppendResult(interp, "can't find package ", name,
(char *) NULL);
if (version != NULL) {
Tcl_AppendResult(interp, " ", version, (char *) NULL);
}
return NULL;
}
if (version == NULL) {
if (clientDataPtr) {
*clientDataPtr = pkgPtr->clientData;
}
return pkgPtr->version;
}
result = ComparePkgVersions(pkgPtr->version, version, &satisfies);
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,
(char *) NULL);
return NULL;
}
CONST char *
Tcl_PkgPresent(interp, name, version, exact)
Tcl_Interp *interp;
CONST char *name;
CONST char *version;
int exact;
{
return Tcl_PkgPresentEx(interp, name, version, exact, (ClientData *) NULL);
}
CONST char *
Tcl_PkgPresentEx(interp, name, version, exact, clientDataPtr)
Tcl_Interp *interp;
CONST char *name;
CONST char *version;
int exact;
ClientData *clientDataPtr;
{
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) {
if (version == NULL) {
if (clientDataPtr) {
*clientDataPtr = pkgPtr->clientData;
}
return pkgPtr->version;
}
result = ComparePkgVersions(pkgPtr->version, version, &satisfies);
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, (char *) NULL);
return NULL;
}
}
if (version != NULL) {
Tcl_AppendResult(interp, "package ", name, " ", version,
" is not present", (char *) NULL);
} else {
Tcl_AppendResult(interp, "package ", name, " is not present",
(char *) NULL);
}
return NULL;
}
int
Tcl_PackageObjCmd(dummy, interp, objc, objv)
ClientData dummy;
Tcl_Interp *interp;
int objc;
Tcl_Obj *CONST objv[];
{
static CONST char *pkgOptions[] = {
"forget", "ifneeded", "names", "present", "provide", "require",
"unknown", "vcompare", "versions", "vsatisfies", (char *) NULL
};
enum pkgOptions {
PKG_FORGET, PKG_IFNEEDED, PKG_NAMES, 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;
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;
ckfree(availPtr->version);
Tcl_EventuallyFree((ClientData)availPtr->script, TCL_DYNAMIC);
ckfree((char *) availPtr);
}
ckfree((char *) pkgPtr);
}
break;
}
case PKG_IFNEEDED: {
int length;
if ((objc != 4) && (objc != 5)) {
Tcl_WrongNumArgs(interp, 2, objv, "package version ?script?");
return TCL_ERROR;
}
argv3 = Tcl_GetString(objv[3]);
if (CheckVersion(interp, argv3) != TCL_OK) {
return TCL_ERROR;
}
argv2 = Tcl_GetString(objv[2]);
if (objc == 4) {
hPtr = Tcl_FindHashEntry(&iPtr->packageTable, argv2);
if (hPtr == NULL) {
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 (ComparePkgVersions(availPtr->version, argv3, (int *) NULL)
== 0) {
if (objc == 4) {
Tcl_SetResult(interp, availPtr->script, TCL_VOLATILE);
return TCL_OK;
}
Tcl_EventuallyFree((ClientData)availPtr->script, TCL_DYNAMIC);
break;
}
}
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 (CheckVersion(interp, version) != 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 (CheckVersion(interp, argv3) != 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 ?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 (CheckVersion(interp, version) != TCL_OK) {
return TCL_ERROR;
}
} else if ((objc != 3) || exact) {
goto requireSyntax;
}
if (exact) {
argv3 = Tcl_GetString(objv[3]);
version = Tcl_PkgRequire(interp, argv3, version, exact);
} else {
version = Tcl_PkgRequire(interp, argv2, version, exact);
}
if (version == NULL) {
return TCL_ERROR;
}
Tcl_SetObjResult( interp, Tcl_NewStringObj( version, -1 ) );
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_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 ((CheckVersion(interp, argv2) != TCL_OK)
|| (CheckVersion(interp, argv3) != TCL_OK)) {
return TCL_ERROR;
}
Tcl_SetIntObj(Tcl_GetObjResult(interp),
ComparePkgVersions(argv2, argv3, (int *) NULL));
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: {
if (objc != 4) {
Tcl_WrongNumArgs(interp, 2, objv, "version1 version2");
return TCL_ERROR;
}
argv3 = Tcl_GetString(objv[3]);
argv2 = Tcl_GetString(objv[2]);
if ((CheckVersion(interp, argv2) != TCL_OK)
|| (CheckVersion(interp, argv3) != TCL_OK)) {
return TCL_ERROR;
}
ComparePkgVersions(argv2, argv3, &satisfies);
Tcl_SetIntObj(Tcl_GetObjResult(interp), satisfies);
break;
}
default: {
panic("Tcl_PackageObjCmd: bad option index to pkgOptions");
}
}
return TCL_OK;
}
static Package *
FindPackage(interp, name)
Tcl_Interp *interp;
CONST char *name;
{
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;
}
void
TclFreePackageInfo(iPtr)
Interp *iPtr;
{
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;
ckfree(availPtr->version);
Tcl_EventuallyFree((ClientData)availPtr->script, TCL_DYNAMIC);
ckfree((char *) availPtr);
}
ckfree((char *) pkgPtr);
}
Tcl_DeleteHashTable(&iPtr->packageTable);
if (iPtr->packageUnknown != NULL) {
ckfree(iPtr->packageUnknown);
}
}
static int
CheckVersion(interp, string)
Tcl_Interp *interp;
CONST char *string;
{
CONST char *p = string;
char prevChar;
if (!isdigit(UCHAR(*p))) {
goto error;
}
for (prevChar = *p, p++; *p != 0; p++) {
if (!isdigit(UCHAR(*p)) &&
((*p != '.') || (prevChar == '.'))) {
goto error;
}
prevChar = *p;
}
if (prevChar != '.') {
return TCL_OK;
}
error:
Tcl_AppendResult(interp, "expected version number but got \"",
string, "\"", (char *) NULL);
return TCL_ERROR;
}
static int
ComparePkgVersions(v1, v2, satPtr)
CONST char *v1;
CONST char *v2;
int *satPtr;
{
int thisIsMajor, n1, n2;
thisIsMajor = 1;
while (1) {
n1 = n2 = 0;
while ((*v1 != 0) && (*v1 != '.')) {
n1 = 10*n1 + (*v1 - '0');
v1++;
}
while ((*v2 != 0) && (*v2 != '.')) {
n2 = 10*n2 + (*v2 - '0');
v2++;
}
if (n1 != n2) {
break;
}
if (*v1 != 0) {
v1++;
} else if (*v2 == 0) {
break;
}
if (*v2 != 0) {
v2++;
}
thisIsMajor = 0;
}
if (satPtr != NULL) {
*satPtr = (n1 == n2) || ((n1 > n2) && !thisIsMajor);
}
if (n1 > n2) {
return 1;
} else if (n1 == n2) {
return 0;
} else {
return -1;
}
}