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|
/*
* tclClockFmt.c --
*
* Contains the date format (and scan) routines. This code is back-ported
* from the time and date facilities of tclSE engine, by Serg G. Brester.
*
* Copyright (c) 2015 by Sergey G. Brester aka sebres. All rights reserved.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tclInt.h"
#include "tclDate.h"
/*
* Miscellaneous forward declarations and functions used within this file
*/
static void
ClockFmtObj_DupInternalRep(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr);
static void
ClockFmtObj_FreeInternalRep(Tcl_Obj *objPtr);
static int
ClockFmtObj_SetFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
static void
ClockFmtObj_UpdateString(Tcl_Obj *objPtr);
TCL_DECLARE_MUTEX(ClockFmtMutex); /* Serializes access to common format list. */
static void ClockFmtScnStorageDelete(ClockFmtScnStorage *fss);
static void ClockFrmScnFinalize(ClientData clientData);
/*
* Clock scan and format facilities.
*/
inline int
_str2int(
time_t *out,
register
const char *p,
const char *e,
int sign)
{
register time_t val = 0, prev = 0;
if (sign > 0) {
while (p < e) {
val = val * 10 + (*p++ - '0');
if (val < prev) {
return TCL_ERROR;
}
prev = val;
}
} else {
while (p < e) {
val = val * 10 - (*p++ - '0');
if (val > prev) {
return TCL_ERROR;
}
prev = val;
}
}
*out = val;
return TCL_OK;
}
inline int
_str2wideInt(
Tcl_WideInt *out,
register
const char *p,
const char *e,
int sign)
{
register Tcl_WideInt val = 0, prev = 0;
if (sign > 0) {
while (p < e) {
val = val * 10 + (*p++ - '0');
if (val < prev) {
return TCL_ERROR;
}
prev = val;
}
} else {
while (p < e) {
val = val * 10 - (*p++ - '0');
if (val > prev) {
return TCL_ERROR;
}
prev = val;
}
}
*out = val;
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*/
#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
static struct {
ClockFmtScnStorage *stackPtr;
ClockFmtScnStorage *stackBound;
unsigned int count;
} ClockFmtScnStorage_GC = {NULL, NULL, 0};
inline void
ClockFmtScnStorageGC_In(ClockFmtScnStorage *entry)
{
/* add new entry */
TclSpliceIn(entry, ClockFmtScnStorage_GC.stackPtr);
if (ClockFmtScnStorage_GC.stackBound == NULL) {
ClockFmtScnStorage_GC.stackBound = entry;
}
ClockFmtScnStorage_GC.count++;
/* if GC ist full */
if (ClockFmtScnStorage_GC.count > CLOCK_FMT_SCN_STORAGE_GC_SIZE) {
/* GC stack is LIFO: delete first inserted entry */
ClockFmtScnStorage *delEnt = ClockFmtScnStorage_GC.stackBound;
ClockFmtScnStorage_GC.stackBound = delEnt->prevPtr;
TclSpliceOut(delEnt, ClockFmtScnStorage_GC.stackPtr);
ClockFmtScnStorage_GC.count--;
delEnt->prevPtr = delEnt->nextPtr = NULL;
/* remove it now */
ClockFmtScnStorageDelete(delEnt);
}
}
inline void
ClockFmtScnStorage_GC_Out(ClockFmtScnStorage *entry)
{
TclSpliceOut(entry, ClockFmtScnStorage_GC.stackPtr);
ClockFmtScnStorage_GC.count--;
if (ClockFmtScnStorage_GC.stackBound == entry) {
ClockFmtScnStorage_GC.stackBound = entry->prevPtr;
}
entry->prevPtr = entry->nextPtr = NULL;
}
#endif
/*
*----------------------------------------------------------------------
*/
static Tcl_HashTable FmtScnHashTable;
static int initialized = 0;
inline Tcl_HashEntry *
HashEntry4FmtScn(ClockFmtScnStorage *fss) {
return (Tcl_HashEntry*)(fss + 1);
};
inline ClockFmtScnStorage *
FmtScn4HashEntry(Tcl_HashEntry *hKeyPtr) {
return (ClockFmtScnStorage*)(((char*)hKeyPtr) - sizeof(ClockFmtScnStorage));
};
/*
* Format storage hash (list of formats shared across all threads).
*/
static Tcl_HashEntry *
ClockFmtScnStorageAllocProc(
Tcl_HashTable *tablePtr, /* Hash table. */
void *keyPtr) /* Key to store in the hash table entry. */
{
ClockFmtScnStorage *fss;
const char *string = (const char *) keyPtr;
Tcl_HashEntry *hPtr;
unsigned int size,
allocsize = sizeof(ClockFmtScnStorage) + sizeof(Tcl_HashEntry);
allocsize += (size = strlen(string) + 1);
if (size > sizeof(hPtr->key)) {
allocsize -= sizeof(hPtr->key);
}
fss = ckalloc(allocsize);
/* initialize */
memset(fss, 0, sizeof(*fss));
hPtr = HashEntry4FmtScn(fss);
memcpy(&hPtr->key.string, string, size);
hPtr->clientData = 0; /* currently unused */
return hPtr;
}
static void
ClockFmtScnStorageFreeProc(
Tcl_HashEntry *hPtr)
{
ClockFmtScnStorage *fss = FmtScn4HashEntry(hPtr);
if (fss->scnTok != NULL) {
ckfree(fss->scnTok);
fss->scnTok = NULL;
fss->scnTokC = 0;
}
if (fss->fmtTok != NULL) {
ckfree(fss->fmtTok);
fss->fmtTok = NULL;
fss->fmtTokC = 0;
}
ckfree(fss);
}
static void
ClockFmtScnStorageDelete(ClockFmtScnStorage *fss) {
Tcl_HashEntry *hPtr = HashEntry4FmtScn(fss);
/*
* This will delete a hash entry and call "ckfree" for storage self, if
* some additionally handling required, freeEntryProc can be used instead
*/
Tcl_DeleteHashEntry(hPtr);
}
/*
* Derivation of tclStringHashKeyType with another allocEntryProc
*/
static Tcl_HashKeyType ClockFmtScnStorageHashKeyType;
/*
*----------------------------------------------------------------------
*/
static ClockFmtScnStorage *
FindOrCreateFmtScnStorage(
Tcl_Interp *interp,
const char *strFmt)
{
ClockFmtScnStorage *fss = NULL;
int new;
Tcl_HashEntry *hPtr;
Tcl_MutexLock(&ClockFmtMutex);
/* if not yet initialized */
if (!initialized) {
/* initialize type */
memcpy(&ClockFmtScnStorageHashKeyType, &tclStringHashKeyType, sizeof(tclStringHashKeyType));
ClockFmtScnStorageHashKeyType.allocEntryProc = ClockFmtScnStorageAllocProc;
ClockFmtScnStorageHashKeyType.freeEntryProc = ClockFmtScnStorageFreeProc;
/* initialize hash table */
Tcl_InitCustomHashTable(&FmtScnHashTable, TCL_CUSTOM_TYPE_KEYS,
&ClockFmtScnStorageHashKeyType);
initialized = 1;
Tcl_CreateExitHandler(ClockFrmScnFinalize, NULL);
}
/* get or create entry (and alocate storage) */
hPtr = Tcl_CreateHashEntry(&FmtScnHashTable, strFmt, &new);
if (hPtr != NULL) {
fss = FmtScn4HashEntry(hPtr);
#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
/* unlink if it is currently in GC */
if (new == 0 && fss->objRefCount == 0) {
ClockFmtScnStorage_GC_Out(fss);
}
#endif
/* new reference, so increment in lock right now */
fss->objRefCount++;
}
Tcl_MutexUnlock(&ClockFmtMutex);
if (fss == NULL && interp != NULL) {
Tcl_AppendResult(interp, "retrieve clock format failed \"",
strFmt ? strFmt : "", "\"", NULL);
Tcl_SetErrorCode(interp, "TCL", "EINVAL", NULL);
}
return fss;
}
/*
* Type definition.
*/
Tcl_ObjType ClockFmtObjType = {
"clock-format", /* name */
ClockFmtObj_FreeInternalRep, /* freeIntRepProc */
ClockFmtObj_DupInternalRep, /* dupIntRepProc */
ClockFmtObj_UpdateString, /* updateStringProc */
ClockFmtObj_SetFromAny /* setFromAnyProc */
};
#define SetObjClockFmtScn(objPtr, fss) \
objPtr->internalRep.twoPtrValue.ptr1 = fss
#define ObjClockFmtScn(objPtr) \
(ClockFmtScnStorage *)objPtr->internalRep.twoPtrValue.ptr1;
#define SetObjLitStorage(objPtr, lit) \
objPtr->internalRep.twoPtrValue.ptr2 = lit
#define ObjLitStorage(objPtr) \
(ClockLitStorage *)objPtr->internalRep.twoPtrValue.ptr2;
#define ClockFmtObj_SetObjIntRep(objPtr, fss, lit) \
objPtr->internalRep.twoPtrValue.ptr1 = fss, \
objPtr->internalRep.twoPtrValue.ptr2 = lit, \
objPtr->typePtr = &ClockFmtObjType;
/*
*----------------------------------------------------------------------
*/
static void
ClockFmtObj_DupInternalRep(srcPtr, copyPtr)
Tcl_Obj *srcPtr;
Tcl_Obj *copyPtr;
{
ClockFmtScnStorage *fss = ObjClockFmtScn(srcPtr);
// ClockLitStorage *lit = ObjLitStorage(srcPtr);
if (fss != NULL) {
Tcl_MutexLock(&ClockFmtMutex);
fss->objRefCount++;
Tcl_MutexUnlock(&ClockFmtMutex);
}
ClockFmtObj_SetObjIntRep(copyPtr, fss, NULL);
/* if no format representation, dup string representation */
if (fss == NULL) {
copyPtr->bytes = ckalloc(srcPtr->length + 1);
memcpy(copyPtr->bytes, srcPtr->bytes, srcPtr->length + 1);
copyPtr->length = srcPtr->length;
}
}
/*
*----------------------------------------------------------------------
*/
static void
ClockFmtObj_FreeInternalRep(objPtr)
Tcl_Obj *objPtr;
{
ClockFmtScnStorage *fss = ObjClockFmtScn(objPtr);
// ClockLitStorage *lit = ObjLitStorage(objPtr);
if (fss != NULL) {
Tcl_MutexLock(&ClockFmtMutex);
/* decrement object reference count of format/scan storage */
if (--fss->objRefCount <= 0) {
#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
/* don't remove it right now (may be reusable), just add to GC */
ClockFmtScnStorageGC_In(fss);
#else
/* remove storage (format representation) */
ClockFmtScnStorageDelete(fss);
#endif
}
Tcl_MutexUnlock(&ClockFmtMutex);
}
SetObjClockFmtScn(objPtr, NULL);
SetObjLitStorage(objPtr, NULL);
objPtr->typePtr = NULL;
};
/*
*----------------------------------------------------------------------
*/
static int
ClockFmtObj_SetFromAny(interp, objPtr)
Tcl_Interp *interp;
Tcl_Obj *objPtr;
{
ClockFmtScnStorage *fss;
const char *strFmt = TclGetString(objPtr);
if (!strFmt || (fss = FindOrCreateFmtScnStorage(interp, strFmt)) == NULL) {
return TCL_ERROR;
}
if (objPtr->typePtr && objPtr->typePtr->freeIntRepProc)
objPtr->typePtr->freeIntRepProc(objPtr);
ClockFmtObj_SetObjIntRep(objPtr, fss, NULL);
return TCL_OK;
};
/*
*----------------------------------------------------------------------
*/
static void
ClockFmtObj_UpdateString(objPtr)
Tcl_Obj *objPtr;
{
char *name = "UNKNOWN";
int len;
ClockFmtScnStorage *fss = ObjClockFmtScn(objPtr);
if (fss != NULL) {
Tcl_HashEntry *hPtr = HashEntry4FmtScn(fss);
name = hPtr->key.string;
}
len = strlen(name);
objPtr->length = len,
objPtr->bytes = ckalloc((size_t)++len);
if (objPtr->bytes)
memcpy(objPtr->bytes, name, len);
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetClockFrmScnFromObj --
*
* Returns a clock format/scan representation of (*objPtr), if possible.
* If something goes wrong, NULL is returned, and if interp is non-NULL,
* an error message is written there.
*
* Results:
* Valid representation of type ClockFmtScnStorage.
*
* Side effects:
* Caches the ClockFmtScnStorage reference as the internal rep of (*objPtr)
* and in global hash table, shared across all threads.
*
*----------------------------------------------------------------------
*/
ClockFmtScnStorage *
Tcl_GetClockFrmScnFromObj(
Tcl_Interp *interp,
Tcl_Obj *objPtr)
{
ClockFmtScnStorage *fss;
if (objPtr->typePtr != &ClockFmtObjType) {
if (ClockFmtObj_SetFromAny(interp, objPtr) != TCL_OK) {
return NULL;
}
}
fss = ObjClockFmtScn(objPtr);
if (fss == NULL) {
const char *strFmt = TclGetString(objPtr);
fss = FindOrCreateFmtScnStorage(interp, strFmt);
}
return fss;
}
static int
LocaleListSearch(ClockFmtScnCmdArgs *opts,
DateInfo *info, const char * mcKey, int *val)
{
Tcl_Obj *callargs[4] = {NULL, NULL, NULL, NULL}, **lstv;
int i, lstc;
Tcl_Obj *valObj = NULL;
int ret = TCL_RETURN;
/* get msgcat value */
TclNewLiteralStringObj(callargs[0], "::msgcat::mcget");
TclNewLiteralStringObj(callargs[1], "::tcl::clock");
callargs[2] = opts->localeObj;
if (opts->localeObj == NULL) {
TclNewLiteralStringObj(callargs[1], "c");
}
callargs[3] = Tcl_NewStringObj(mcKey, -1);
for (i = 0; i < 4; i++) {
Tcl_IncrRefCount(callargs[i]);
}
if (Tcl_EvalObjv(opts->interp, 4, callargs, 0) != TCL_OK) {
goto done;
}
Tcl_InitObjRef(valObj, Tcl_GetObjResult(opts->interp));
/* is a list */
if (TclListObjGetElements(opts->interp, valObj, &lstc, &lstv) != TCL_OK) {
goto done;
}
/* search in list */
for (i = 0; i < lstc; i++) {
const char *s = TclGetString(lstv[i]);
int l = lstv[i]->length;
if ( l <= info->dateEnd - yyInput
&& strncasecmp(yyInput, s, l) == 0
) {
*val = i;
yyInput += l;
break;
}
}
ret = TCL_OK;
/* if not found */
if (i >= lstc) {
ret = TCL_ERROR;
}
done:
Tcl_UnsetObjRef(valObj);
for (i = 0; i < 4; i++) {
Tcl_UnsetObjRef(callargs[i]);
}
return ret;
}
static int
StaticListSearch(ClockFmtScnCmdArgs *opts,
DateInfo *info, const char **lst, int *val)
{
int len;
const char **s = lst;
while (*s != NULL) {
len = strlen(*s);
if ( len <= info->dateEnd - yyInput
&& strncasecmp(yyInput, *s, len) == 0
) {
*val = (s - lst);
yyInput += len;
break;
}
s++;
}
if (*s == NULL) {
return TCL_ERROR;
}
return TCL_OK;
};
static int
ClockScnToken_Month_Proc(ClockFmtScnCmdArgs *opts,
DateInfo *info, ClockScanToken *tok)
{
/*
static const char * months[] = {
/* full * /
"January", "February", "March",
"April", "May", "June",
"July", "August", "September",
"October", "November", "December",
/* abbr * /
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
NULL
};
int val;
if (StaticListSearch(opts, info, months, &val) != TCL_OK) {
return TCL_ERROR;
}
yyMonth = (val % 12) + 1;
return TCL_OK;
*/
int val;
int ret = LocaleListSearch(opts, info, "MONTHS_FULL", &val);
if (ret != TCL_OK) {
if (ret == TCL_RETURN) {
return ret;
}
ret = LocaleListSearch(opts, info, "MONTHS_ABBREV", &val);
if (ret != TCL_OK) {
return ret;
}
}
yyMonth = val + 1;
return TCL_OK;
}
static int
ClockScnToken_LocaleListMatcher_Proc(ClockFmtScnCmdArgs *opts,
DateInfo *info, ClockScanToken *tok)
{
int val;
int ret = LocaleListSearch(opts, info, (char *)tok->map->data, &val);
if (ret != TCL_OK) {
return ret;
}
*(time_t *)(((char *)info) + tok->map->offs) = val;
return TCL_OK;
}
static const char *ScnSTokenMapIndex =
"dmbyYHMSJCs";
static ClockScanTokenMap ScnSTokenMap[] = {
/* %d %e */
{CTOKT_DIGIT, CLF_DATE, 1, 2, TclOffset(DateInfo, date.dayOfMonth),
NULL},
/* %m */
{CTOKT_DIGIT, CLF_DATE, 1, 2, TclOffset(DateInfo, date.month),
NULL},
/* %b %B %h */
{CTOKT_PARSER, CLF_DATE, 0, 0, 0,
ClockScnToken_Month_Proc},
/* %y */
{CTOKT_DIGIT, CLF_DATE, 1, 2, TclOffset(DateInfo, date.year),
NULL},
/* %Y */
{CTOKT_DIGIT, CLF_DATE | CLF_CENTURY, 1, 4, TclOffset(DateInfo, date.year),
NULL},
/* %H */
{CTOKT_DIGIT, CLF_TIME, 1, 2, TclOffset(DateInfo, date.hour),
NULL},
/* %M */
{CTOKT_DIGIT, CLF_TIME, 1, 2, TclOffset(DateInfo, date.minutes),
NULL},
/* %S */
{CTOKT_DIGIT, CLF_TIME, 1, 2, TclOffset(DateInfo, date.secondOfDay),
NULL},
/* %J */
{CTOKT_DIGIT, CLF_DATE | CLF_JULIANDAY, 1, 0xffff, TclOffset(DateInfo, date.julianDay),
NULL},
/* %C */
{CTOKT_DIGIT, CLF_DATE | CLF_CENTURY, 1, 2, TclOffset(DateInfo, dateCentury),
NULL},
/* %s */
{CTOKT_DIGIT, CLF_LOCALSEC | CLF_SIGNED, 1, 0xffff, TclOffset(DateInfo, date.localSeconds),
NULL},
};
static const char *ScnSTokenWrapMapIndex[2] = {
"eBh",
"dbb"
};
static const char *ScnETokenMapIndex =
"";
static ClockScanTokenMap ScnETokenMap[] = {
{0, 0, 0}
};
static const char *ScnETokenWrapMapIndex[2] = {
"",
""
};
static const char *ScnOTokenMapIndex =
"d";
static ClockScanTokenMap ScnOTokenMap[] = {
/* %Od %Oe */
{CTOKT_PARSER, CLF_DATE, 0, 0, TclOffset(DateInfo, date.dayOfMonth),
ClockScnToken_LocaleListMatcher_Proc, "LOCALE_NUMERALS"},
};
static const char *ScnOTokenWrapMapIndex[2] = {
"e",
"d"
};
static const char *ScnSpecTokenMapIndex =
" ";
static ClockScanTokenMap ScnSpecTokenMap[] = {
{CTOKT_SPACE, 0, 1, 0xffff, 0,
NULL},
};
static ClockScanTokenMap ScnWordTokenMap = {
CTOKT_WORD, 0, 1, 0, 0,
NULL
};
#define AllocTokenInChain(tok, chain, tokCnt) \
if (++(tok) >= (chain) + (tokCnt)) { \
(char *)(chain) = ckrealloc((char *)(chain), \
(tokCnt + CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE) * sizeof(*(tok))); \
if ((chain) == NULL) { goto done; }; \
(tok) = (chain) + (tokCnt); \
(tokCnt) += CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE; \
} \
memset(tok, 0, sizeof(*(tok)));
/*
*----------------------------------------------------------------------
*/
ClockScanToken *
ClockGetOrParseScanFormat(
Tcl_Interp *interp, /* Tcl interpreter */
Tcl_Obj *formatObj) /* Format container */
{
ClockFmtScnStorage *fss;
ClockScanToken *tok;
if (formatObj->typePtr != &ClockFmtObjType) {
if (ClockFmtObj_SetFromAny(interp, formatObj) != TCL_OK) {
return NULL;
}
}
fss = ObjClockFmtScn(formatObj);
if (fss == NULL) {
fss = FindOrCreateFmtScnStorage(interp, TclGetString(formatObj));
if (fss == NULL) {
return NULL;
}
}
/* if first time scanning - tokenize format */
if (fss->scnTok == NULL) {
const char *strFmt;
register const char *p, *e, *cp;
Tcl_MutexLock(&ClockFmtMutex);
fss->scnTokC = CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE;
fss->scnTok =
tok = ckalloc(sizeof(*tok) * CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE);
memset(tok, 0, sizeof(*(tok)));
strFmt = HashEntry4FmtScn(fss)->key.string;
for (e = p = strFmt, e += strlen(strFmt); p != e; p++) {
switch (*p) {
case '%':
if (1) {
ClockScanTokenMap * maps = ScnSTokenMap;
const char *mapIndex = ScnSTokenMapIndex,
**wrapIndex = ScnSTokenWrapMapIndex;
if (p+1 >= e) {
goto word_tok;
}
p++;
/* try to find modifier: */
switch (*p) {
case '%':
/* begin new word token - don't join with previous word token,
* because current mapping should be "...%%..." -> "...%..." */
tok->map = &ScnWordTokenMap;
tok->tokWord.start = tok->tokWord.end = p;
AllocTokenInChain(tok, fss->scnTok, fss->scnTokC);
continue;
break;
case 'E':
maps = ScnETokenMap,
mapIndex = ScnETokenMapIndex,
wrapIndex = ScnETokenWrapMapIndex;
p++;
break;
case 'O':
maps = ScnOTokenMap,
mapIndex = ScnOTokenMapIndex,
wrapIndex = ScnOTokenWrapMapIndex;
p++;
break;
}
/* search direct index */
cp = strchr(mapIndex, *p);
if (!cp || *cp == '\0') {
/* search wrapper index (multiple chars for same token) */
cp = strchr(wrapIndex[0], *p);
if (!cp || *cp == '\0') {
p--;
goto word_tok;
}
cp = strchr(mapIndex, wrapIndex[1][cp - wrapIndex[0]]);
if (!cp || *cp == '\0') { /* unexpected, but ... */
#ifdef DEBUG
Tcl_Panic("token \"%c\" has no map in wrapper resolver", *p);
#endif
p--;
goto word_tok;
}
}
tok->map = &ScnSTokenMap[cp - mapIndex];
tok->tokWord.start = p;
/* calculate look ahead value by standing together tokens */
if (tok > fss->scnTok) {
ClockScanToken *prevTok = tok - 1;
unsigned int lookAhead = tok->map->minSize;
while (prevTok >= fss->scnTok) {
if (prevTok->map->type != tok->map->type) {
break;
}
prevTok->lookAhead += lookAhead;
prevTok--;
}
}
/* next token */
AllocTokenInChain(tok, fss->scnTok, fss->scnTokC);
}
break;
case ' ':
cp = strchr(ScnSpecTokenMapIndex, *p);
if (!cp || *cp == '\0') {
p--;
goto word_tok;
}
tok->map = &ScnSpecTokenMap[cp - ScnSpecTokenMapIndex];
AllocTokenInChain(tok, fss->scnTok, fss->scnTokC);
break;
default:
word_tok:
if (1) {
ClockScanToken *wordTok = tok;
if (tok > fss->scnTok && (tok-1)->map == &ScnWordTokenMap) {
wordTok = tok-1;
}
wordTok->tokWord.end = p;
if (wordTok == tok) {
wordTok->tokWord.start = p;
wordTok->map = &ScnWordTokenMap;
AllocTokenInChain(tok, fss->scnTok, fss->scnTokC);
}
continue;
}
break;
}
continue;
}
done:
Tcl_MutexUnlock(&ClockFmtMutex);
}
return fss->scnTok;
}
/*
*----------------------------------------------------------------------
*/
int
ClockScan(
ClientData clientData, /* Client data containing literal pool */
Tcl_Interp *interp, /* Tcl interpreter */
register DateInfo *info, /* Date fields used for parsing & converting */
Tcl_Obj *strObj, /* String containing the time to scan */
ClockFmtScnCmdArgs *opts) /* Command options */
{
ClockClientData *dataPtr = clientData;
ClockScanToken *tok;
ClockScanTokenMap *map;
register const char *p, *x, *end;
unsigned short int flags = 0;
int ret = TCL_ERROR;
if ((tok = ClockGetOrParseScanFormat(interp, opts->formatObj)) == NULL) {
return TCL_ERROR;
}
/* prepare parsing */
yyMeridian = MER24;
p = TclGetString(strObj);
end = p + strObj->length;
/* in strict mode - bypass spaces at begin / end only (not between tokens) */
if (opts->flags & CLF_STRICT) {
while (p < end && isspace(UCHAR(*p))) {
p++;
}
}
info->dateStart = yyInput = p;
info->dateEnd = end;
/* parse string */
for (; tok->map != NULL; tok++) {
map = tok->map;
/* bypass spaces at begin of input before parsing each token */
if ( !(opts->flags & CLF_STRICT)
&& (map->type != CTOKT_SPACE && map->type != CTOKT_WORD)
) {
while (p < end && isspace(UCHAR(*p))) {
p++;
}
}
yyInput = p;
switch (map->type)
{
case CTOKT_DIGIT:
if (1) {
int size = map->maxSize;
int sign = 1;
if (map->flags & CLF_SIGNED) {
if (*p == '+') { yyInput = ++p; }
else
if (*p == '-') { yyInput = ++p; sign = -1; };
}
/* greedy find digits (look for forward digits consider spaces),
* corresponding pre-calculated lookAhead */
if (size != map->minSize && tok->lookAhead) {
int spcnt = 0;
const char *pe;
size += tok->lookAhead;
x = p + size; if (x > end) { x = end; };
pe = x;
while (p < x) {
if (isspace(UCHAR(*p))) {
if (pe > p) { pe = p; };
if (x < end) x++;
p++;
spcnt++;
continue;
}
if (isdigit(UCHAR(*p))) {
p++;
continue;
}
break;
}
/* consider reserved (lookAhead) for next tokens */
p -= tok->lookAhead + spcnt;
if (p > pe) {
p = pe;
}
} else {
x = p + size; if (x > end) { x = end; };
while (isdigit(UCHAR(*p)) && p < x) { p++; };
}
size = p - yyInput;
if (size < map->minSize) {
/* missing input -> error */
goto error;
}
/* string 2 number, put number into info structure by offset */
p = yyInput; x = p + size;
if (!(map->flags & CLF_LOCALSEC)) {
if (_str2int((time_t *)(((char *)info) + map->offs),
p, x, sign) != TCL_OK) {
goto overflow;
}
p = x;
} else {
if (_str2wideInt((Tcl_WideInt *)(((char *)info) + map->offs),
p, x, sign) != TCL_OK) {
goto overflow;
}
p = x;
}
flags |= map->flags;
}
break;
case CTOKT_PARSER:
switch (map->parser(opts, info, tok)) {
case TCL_OK:
break;
case TCL_RETURN:
goto done;
break;
default:
goto error;
break;
};
p = yyInput;
flags |= map->flags;
break;
case CTOKT_SPACE:
/* at least one space in strict mode */
if (opts->flags & CLF_STRICT) {
if (!isspace(UCHAR(*p))) {
/* unmatched -> error */
goto error;
}
p++;
}
while (p < end && isspace(UCHAR(*p))) {
p++;
}
break;
case CTOKT_WORD:
x = tok->tokWord.start;
if (x == tok->tokWord.end) { /* single char word */
if (*p != *x) {
/* no match -> error */
goto error;
}
p++;
continue;
}
/* multi-char word */
while (p < end && x < tok->tokWord.end && *p++ == *x++) {};
if (x < tok->tokWord.end) {
/* no match -> error */
goto error;
}
break;
}
}
/* ignore spaces at end */
while (p < end && isspace(UCHAR(*p))) {
p++;
}
/* check end was reached */
if (p < end) {
/* something after last token - wrong format */
goto error;
}
/* invalidate result */
if (flags & CLF_DATE) {
if (!(flags & CLF_JULIANDAY)) {
info->flags |= CLF_INVALIDATE_SECONDS|CLF_INVALIDATE_JULIANDAY;
if (yyYear < 100) {
if (!(flags & CLF_CENTURY)) {
if (yyYear >= dataPtr->yearOfCenturySwitch) {
yyYear -= 100;
}
yyYear += dataPtr->currentYearCentury;
} else {
yyYear += info->dateCentury * 100;
}
}
yydate.era = CE;
}
/* if date but no time - reset time */
if (!(flags & (CLF_TIME|CLF_LOCALSEC))) {
info->flags |= CLF_INVALIDATE_SECONDS;
yydate.localSeconds = 0;
}
}
if (flags & CLF_TIME) {
info->flags |= CLF_INVALIDATE_SECONDS;
yySeconds = ToSeconds(yyHour, yyMinutes,
yySeconds, yyMeridian);
} else
if (!(flags & CLF_LOCALSEC)) {
info->flags |= CLF_INVALIDATE_SECONDS;
yySeconds = yydate.localSeconds % SECONDS_PER_DAY;
}
ret = TCL_OK;
goto done;
overflow:
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"integer value too large to represent", -1));
Tcl_SetErrorCode(interp, "CLOCK", "integervalueTooLarge", NULL);
goto done;
error:
Tcl_SetResult(interp,
"input string does not match supplied format", TCL_STATIC);
Tcl_SetErrorCode(interp, "CLOCK", "badInputString", NULL);
done:
return ret;
}
MODULE_SCOPE void
ClockFrmScnClearCaches(void)
{
Tcl_MutexLock(&ClockFmtMutex);
/* clear caches ... */
Tcl_MutexUnlock(&ClockFmtMutex);
}
static void
ClockFrmScnFinalize(
ClientData clientData) /* Not used. */
{
Tcl_MutexLock(&ClockFmtMutex);
#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
/* clear GC */
ClockFmtScnStorage_GC.stackPtr = NULL;
ClockFmtScnStorage_GC.stackBound = NULL;
ClockFmtScnStorage_GC.count = 0;
#endif
if (initialized) {
Tcl_DeleteHashTable(&FmtScnHashTable);
initialized = 0;
}
Tcl_MutexUnlock(&ClockFmtMutex);
Tcl_MutexFinalize(&ClockFmtMutex);
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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