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#include <unistd.h>
#include <string.h>
#include <jim.h>
# include <sys/types.h>
# include <dirent.h>
/* -----------------------------------------------------------------------------
* Packages handling
* ---------------------------------------------------------------------------*/
#define JIM_PKG_ANY_VERSION -1
int Jim_PackageProvide(Jim_Interp *interp, const char *name, const char *ver,
int flags)
{
/* If the package was already provided returns an error. */
if (Jim_FindHashEntry(&interp->packages, name) != NULL) {
if (flags & JIM_ERRMSG) {
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp),
"package '", name, "' was already provided", NULL);
}
return JIM_ERR;
}
Jim_AddHashEntry(&interp->packages, name, (char*) ver);
return JIM_OK;
}
static char *JimFindPackage(Jim_Interp *interp, char **prefixes,
int prefixc, const char *pkgName)
{
int i;
for (i = 0; i < prefixc; i++) {
char buf[JIM_PATH_LEN];
if (prefixes[i] == NULL) continue;
snprintf(buf, sizeof(buf), "%s/%s.tcl", prefixes[i], pkgName);
if (access(buf, R_OK) == 0) {
return Jim_StrDup(buf);
}
snprintf(buf, sizeof(buf), "%s/%s.so", prefixes[i], pkgName);
if (access(buf, R_OK) == 0) {
return Jim_StrDup(buf);
}
}
return NULL;
}
/* Search for a suitable package under every dir specified by jim_libpath
* and load it if possible. If a suitable package was loaded with success
* JIM_OK is returned, otherwise JIM_ERR is returned. */
static int JimLoadPackage(Jim_Interp *interp, const char *name, int flags)
{
Jim_Obj *libPathObjPtr;
char **prefixes, *path;
int prefixc, i, retCode = JIM_OK;
libPathObjPtr = Jim_GetGlobalVariableStr(interp, "jim_libpath", JIM_NONE);
if (libPathObjPtr == NULL) {
prefixc = 0;
libPathObjPtr = NULL;
} else {
Jim_IncrRefCount(libPathObjPtr);
Jim_ListLength(interp, libPathObjPtr, &prefixc);
}
prefixes = Jim_Alloc(sizeof(char*)*prefixc);
for (i = 0; i < prefixc; i++) {
Jim_Obj *prefixObjPtr;
if (Jim_ListIndex(interp, libPathObjPtr, i,
&prefixObjPtr, JIM_NONE) != JIM_OK)
{
prefixes[i] = NULL;
continue;
}
prefixes[i] = Jim_StrDup(Jim_GetString(prefixObjPtr, NULL));
}
/* Scan every directory for the the first match */
path = JimFindPackage(interp, prefixes, prefixc, name);
if (path != NULL) {
char *p = strrchr(path, '.');
/* Try to load/source it */
if (p && strcmp(p, ".tcl") == 0) {
retCode = Jim_EvalFile(interp, path);
} else {
retCode = Jim_LoadLibrary(interp, path);
}
} else {
retCode = JIM_ERR;
}
Jim_Free(path);
for (i = 0; i < prefixc; i++)
Jim_Free(prefixes[i]);
Jim_Free(prefixes);
if (libPathObjPtr)
Jim_DecrRefCount(interp, libPathObjPtr);
return retCode;
}
const char *Jim_PackageRequire(Jim_Interp *interp, const char *name,
const char *ver, int flags)
{
Jim_HashEntry *he;
/* Start with an empty error string */
Jim_SetResultString(interp, "", 0);
he = Jim_FindHashEntry(&interp->packages, name);
if (he == NULL) {
/* Try to load the package. */
if (JimLoadPackage(interp, name, flags) == JIM_OK) {
he = Jim_FindHashEntry(&interp->packages, name);
if (he == NULL) {
/* Did not call package provide, so we do it for them */
Jim_PackageProvide(interp, name, "1.0", 0);
return "1.0";
}
return he->val;
}
/* No way... return an error. */
if (flags & JIM_ERRMSG) {
int len;
Jim_GetString(Jim_GetResult(interp), &len);
Jim_AppendStrings(interp, Jim_GetResult(interp), len ? "\n" : "",
"Can't find package '", name, "'", NULL);
}
return NULL;
} else {
return he->val;
}
}
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