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Unified Diff: third_party/sqlite/src/src/date.c

Issue 2751253002: [sql] Import SQLite 3.17.0. (Closed)
Patch Set: also clang on Linux i386 Created 3 years, 9 months ago
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Index: third_party/sqlite/src/src/date.c
diff --git a/third_party/sqlite/src/src/date.c b/third_party/sqlite/src/src/date.c
index 3d7604ab45380a6ca1282464cd338b3e301f7000..a08248ce2f2504bd18626c0f2b92639f6ff85943 100644
--- a/third_party/sqlite/src/src/date.c
+++ b/third_party/sqlite/src/src/date.c
@@ -50,54 +50,80 @@
#ifndef SQLITE_OMIT_DATETIME_FUNCS
+/*
+** The MSVC CRT on Windows CE may not have a localtime() function.
+** So declare a substitute. The substitute function itself is
+** defined in "os_win.c".
+*/
+#if !defined(SQLITE_OMIT_LOCALTIME) && defined(_WIN32_WCE) && \
+ (!defined(SQLITE_MSVC_LOCALTIME_API) || !SQLITE_MSVC_LOCALTIME_API)
+struct tm *__cdecl localtime(const time_t *);
+#endif
/*
** A structure for holding a single date and time.
*/
typedef struct DateTime DateTime;
struct DateTime {
- sqlite3_int64 iJD; /* The julian day number times 86400000 */
- int Y, M, D; /* Year, month, and day */
- int h, m; /* Hour and minutes */
- int tz; /* Timezone offset in minutes */
- double s; /* Seconds */
- char validYMD; /* True (1) if Y,M,D are valid */
- char validHMS; /* True (1) if h,m,s are valid */
- char validJD; /* True (1) if iJD is valid */
- char validTZ; /* True (1) if tz is valid */
- char tzSet; /* Timezone was set explicitly */
+ sqlite3_int64 iJD; /* The julian day number times 86400000 */
+ int Y, M, D; /* Year, month, and day */
+ int h, m; /* Hour and minutes */
+ int tz; /* Timezone offset in minutes */
+ double s; /* Seconds */
+ char validJD; /* True (1) if iJD is valid */
+ char rawS; /* Raw numeric value stored in s */
+ char validYMD; /* True (1) if Y,M,D are valid */
+ char validHMS; /* True (1) if h,m,s are valid */
+ char validTZ; /* True (1) if tz is valid */
+ char tzSet; /* Timezone was set explicitly */
+ char isError; /* An overflow has occurred */
};
/*
-** Convert zDate into one or more integers. Additional arguments
-** come in groups of 5 as follows:
+** Convert zDate into one or more integers according to the conversion
+** specifier zFormat.
+**
+** zFormat[] contains 4 characters for each integer converted, except for
+** the last integer which is specified by three characters. The meaning
+** of a four-character format specifiers ABCD is:
**
-** N number of digits in the integer
-** min minimum allowed value of the integer
-** max maximum allowed value of the integer
-** nextC first character after the integer
-** pVal where to write the integers value.
+** A: number of digits to convert. Always "2" or "4".
+** B: minimum value. Always "0" or "1".
+** C: maximum value, decoded as:
+** a: 12
+** b: 14
+** c: 24
+** d: 31
+** e: 59
+** f: 9999
+** D: the separator character, or \000 to indicate this is the
+** last number to convert.
+**
+** Example: To translate an ISO-8601 date YYYY-MM-DD, the format would
+** be "40f-21a-20c". The "40f-" indicates the 4-digit year followed by "-".
+** The "21a-" indicates the 2-digit month followed by "-". The "20c" indicates
+** the 2-digit day which is the last integer in the set.
**
-** Conversions continue until one with nextC==0 is encountered.
** The function returns the number of successful conversions.
*/
-static int getDigits(const char *zDate, ...){
+static int getDigits(const char *zDate, const char *zFormat, ...){
+ /* The aMx[] array translates the 3rd character of each format
+ ** spec into a max size: a b c d e f */
+ static const u16 aMx[] = { 12, 14, 24, 31, 59, 9999 };
va_list ap;
- int val;
- int N;
- int min;
- int max;
- int nextC;
- int *pVal;
int cnt = 0;
- va_start(ap, zDate);
+ char nextC;
+ va_start(ap, zFormat);
do{
- N = va_arg(ap, int);
- min = va_arg(ap, int);
- max = va_arg(ap, int);
- nextC = va_arg(ap, int);
- pVal = va_arg(ap, int*);
+ char N = zFormat[0] - '0';
+ char min = zFormat[1] - '0';
+ int val = 0;
+ u16 max;
+
+ assert( zFormat[2]>='a' && zFormat[2]<='f' );
+ max = aMx[zFormat[2] - 'a'];
+ nextC = zFormat[3];
val = 0;
while( N-- ){
if( !sqlite3Isdigit(*zDate) ){
@@ -106,12 +132,13 @@ static int getDigits(const char *zDate, ...){
val = val*10 + *zDate - '0';
zDate++;
}
- if( val<min || val>max || (nextC!=0 && nextC!=*zDate) ){
+ if( val<(int)min || val>(int)max || (nextC!=0 && nextC!=*zDate) ){
goto end_getDigits;
}
- *pVal = val;
+ *va_arg(ap,int*) = val;
zDate++;
cnt++;
+ zFormat += 4;
}while( nextC );
end_getDigits:
va_end(ap);
@@ -152,7 +179,7 @@ static int parseTimezone(const char *zDate, DateTime *p){
return c!=0;
}
zDate++;
- if( getDigits(zDate, 2, 0, 14, ':', &nHr, 2, 0, 59, 0, &nMn)!=2 ){
+ if( getDigits(zDate, "20b:20e", &nHr, &nMn)!=2 ){
return 1;
}
zDate += 5;
@@ -173,13 +200,13 @@ zulu_time:
static int parseHhMmSs(const char *zDate, DateTime *p){
int h, m, s;
double ms = 0.0;
- if( getDigits(zDate, 2, 0, 24, ':', &h, 2, 0, 59, 0, &m)!=2 ){
+ if( getDigits(zDate, "20c:20e", &h, &m)!=2 ){
return 1;
}
zDate += 5;
if( *zDate==':' ){
zDate++;
- if( getDigits(zDate, 2, 0, 59, 0, &s)!=1 ){
+ if( getDigits(zDate, "20e", &s)!=1 ){
return 1;
}
zDate += 2;
@@ -197,6 +224,7 @@ static int parseHhMmSs(const char *zDate, DateTime *p){
s = 0;
}
p->validJD = 0;
+ p->rawS = 0;
p->validHMS = 1;
p->h = h;
p->m = m;
@@ -207,6 +235,14 @@ static int parseHhMmSs(const char *zDate, DateTime *p){
}
/*
+** Put the DateTime object into its error state.
+*/
+static void datetimeError(DateTime *p){
+ memset(p, 0, sizeof(*p));
+ p->isError = 1;
+}
+
+/*
** Convert from YYYY-MM-DD HH:MM:SS to julian day. We always assume
** that the YYYY-MM-DD is according to the Gregorian calendar.
**
@@ -225,6 +261,10 @@ static void computeJD(DateTime *p){
M = 1;
D = 1;
}
+ if( Y<-4713 || Y>9999 || p->rawS ){
+ datetimeError(p);
+ return;
+ }
if( M<=2 ){
Y--;
M += 12;
@@ -267,7 +307,7 @@ static int parseYyyyMmDd(const char *zDate, DateTime *p){
}else{
neg = 0;
}
- if( getDigits(zDate,4,0,9999,'-',&Y,2,1,12,'-',&M,2,1,31,0,&D)!=3 ){
+ if( getDigits(zDate, "40f-21a-21d", &Y, &M, &D)!=3 ){
return 1;
}
zDate += 10;
@@ -306,6 +346,21 @@ static int setDateTimeToCurrent(sqlite3_context *context, DateTime *p){
}
/*
+** Input "r" is a numeric quantity which might be a julian day number,
+** or the number of seconds since 1970. If the value if r is within
+** range of a julian day number, install it as such and set validJD.
+** If the value is a valid unix timestamp, put it in p->s and set p->rawS.
+*/
+static void setRawDateNumber(DateTime *p, double r){
+ p->s = r;
+ p->rawS = 1;
+ if( r>=0.0 && r<5373484.5 ){
+ p->iJD = (sqlite3_int64)(r*86400000.0 + 0.5);
+ p->validJD = 1;
+ }
+}
+
+/*
** Attempt to parse the given string into a julian day number. Return
** the number of errors.
**
@@ -334,13 +389,30 @@ static int parseDateOrTime(
}else if( sqlite3StrICmp(zDate,"now")==0){
return setDateTimeToCurrent(context, p);
}else if( sqlite3AtoF(zDate, &r, sqlite3Strlen30(zDate), SQLITE_UTF8) ){
- p->iJD = (sqlite3_int64)(r*86400000.0 + 0.5);
- p->validJD = 1;
+ setRawDateNumber(p, r);
return 0;
}
return 1;
}
+/* The julian day number for 9999-12-31 23:59:59.999 is 5373484.4999999.
+** Multiplying this by 86400000 gives 464269060799999 as the maximum value
+** for DateTime.iJD.
+**
+** But some older compilers (ex: gcc 4.2.1 on older Macs) cannot deal with
+** such a large integer literal, so we have to encode it.
+*/
+#define INT_464269060799999 ((((i64)0x1a640)<<32)|0x1072fdff)
+
+/*
+** Return TRUE if the given julian day number is within range.
+**
+** The input is the JulianDay times 86400000.
+*/
+static int validJulianDay(sqlite3_int64 iJD){
+ return iJD>=0 && iJD<=INT_464269060799999;
+}
+
/*
** Compute the Year, Month, and Day from the julian day number.
*/
@@ -352,6 +424,7 @@ static void computeYMD(DateTime *p){
p->M = 1;
p->D = 1;
}else{
+ assert( validJulianDay(p->iJD) );
Z = (int)((p->iJD + 43200000)/86400000);
A = (int)((Z - 1867216.25)/36524.25);
A = Z + 1 + A - (A/4);
@@ -382,6 +455,7 @@ static void computeHMS(DateTime *p){
s -= p->h*3600;
p->m = s/60;
p->s += s - p->m*60;
+ p->rawS = 0;
p->validHMS = 1;
}
@@ -402,6 +476,7 @@ static void clearYMD_HMS_TZ(DateTime *p){
p->validTZ = 0;
}
+#ifndef SQLITE_OMIT_LOCALTIME
/*
** On recent Windows platforms, the localtime_s() function is available
** as part of the "Secure CRT". It is essentially equivalent to
@@ -420,7 +495,6 @@ static void clearYMD_HMS_TZ(DateTime *p){
#define HAVE_LOCALTIME_S 1
#endif
-#ifndef SQLITE_OMIT_LOCALTIME
/*
** The following routine implements the rough equivalent of localtime_r()
** using whatever operating-system specific localtime facility that
@@ -443,14 +517,14 @@ static int osLocaltime(time_t *t, struct tm *pTm){
#endif
sqlite3_mutex_enter(mutex);
pX = localtime(t);
-#ifndef SQLITE_OMIT_BUILTIN_TEST
+#ifndef SQLITE_UNTESTABLE
if( sqlite3GlobalConfig.bLocaltimeFault ) pX = 0;
#endif
if( pX ) *pTm = *pX;
sqlite3_mutex_leave(mutex);
rc = pX==0;
#else
-#ifndef SQLITE_OMIT_BUILTIN_TEST
+#ifndef SQLITE_UNTESTABLE
if( sqlite3GlobalConfig.bLocaltimeFault ) return 1;
#endif
#if HAVE_LOCALTIME_R
@@ -521,7 +595,9 @@ static sqlite3_int64 localtimeOffset(
y.validYMD = 1;
y.validHMS = 1;
y.validJD = 0;
+ y.rawS = 0;
y.validTZ = 0;
+ y.isError = 0;
computeJD(&y);
*pRc = SQLITE_OK;
return y.iJD - x.iJD;
@@ -529,6 +605,29 @@ static sqlite3_int64 localtimeOffset(
#endif /* SQLITE_OMIT_LOCALTIME */
/*
+** The following table defines various date transformations of the form
+**
+** 'NNN days'
+**
+** Where NNN is an arbitrary floating-point number and "days" can be one
+** of several units of time.
+*/
+static const struct {
+ u8 eType; /* Transformation type code */
+ u8 nName; /* Length of th name */
+ char *zName; /* Name of the transformation */
+ double rLimit; /* Maximum NNN value for this transform */
+ double rXform; /* Constant used for this transform */
+} aXformType[] = {
+ { 0, 6, "second", 464269060800.0, 86400000.0/(24.0*60.0*60.0) },
+ { 0, 6, "minute", 7737817680.0, 86400000.0/(24.0*60.0) },
+ { 0, 4, "hour", 128963628.0, 86400000.0/24.0 },
+ { 0, 3, "day", 5373485.0, 86400000.0 },
+ { 1, 5, "month", 176546.0, 30.0*86400000.0 },
+ { 2, 4, "year", 14713.0, 365.0*86400000.0 },
+};
+
+/*
** Process a modifier to a date-time stamp. The modifiers are
** as follows:
**
@@ -552,17 +651,15 @@ static sqlite3_int64 localtimeOffset(
** to context pCtx. If the error is an unrecognized modifier, no error is
** written to pCtx.
*/
-static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){
+static int parseModifier(
+ sqlite3_context *pCtx, /* Function context */
+ const char *z, /* The text of the modifier */
+ int n, /* Length of zMod in bytes */
+ DateTime *p /* The date/time value to be modified */
+){
int rc = 1;
- int n;
double r;
- char *z, zBuf[30];
- z = zBuf;
- for(n=0; n<ArraySize(zBuf)-1 && zMod[n]; n++){
- z[n] = (char)sqlite3UpperToLower[(u8)zMod[n]];
- }
- z[n] = 0;
- switch( z[0] ){
+ switch(sqlite3UpperToLower[(u8)z[0]] ){
#ifndef SQLITE_OMIT_LOCALTIME
case 'l': {
/* localtime
@@ -570,7 +667,7 @@ static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){
** Assuming the current time value is UTC (a.k.a. GMT), shift it to
** show local time.
*/
- if( strcmp(z, "localtime")==0 ){
+ if( sqlite3_stricmp(z, "localtime")==0 ){
computeJD(p);
p->iJD += localtimeOffset(p, pCtx, &rc);
clearYMD_HMS_TZ(p);
@@ -582,16 +679,21 @@ static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){
/*
** unixepoch
**
- ** Treat the current value of p->iJD as the number of
+ ** Treat the current value of p->s as the number of
** seconds since 1970. Convert to a real julian day number.
*/
- if( strcmp(z, "unixepoch")==0 && p->validJD ){
- p->iJD = (p->iJD + 43200)/86400 + 21086676*(i64)10000000;
- clearYMD_HMS_TZ(p);
- rc = 0;
+ if( sqlite3_stricmp(z, "unixepoch")==0 && p->rawS ){
+ r = p->s*1000.0 + 210866760000000.0;
+ if( r>=0.0 && r<464269060800000.0 ){
+ clearYMD_HMS_TZ(p);
+ p->iJD = (sqlite3_int64)r;
+ p->validJD = 1;
+ p->rawS = 0;
+ rc = 0;
+ }
}
#ifndef SQLITE_OMIT_LOCALTIME
- else if( strcmp(z, "utc")==0 ){
+ else if( sqlite3_stricmp(z, "utc")==0 ){
if( p->tzSet==0 ){
sqlite3_int64 c1;
computeJD(p);
@@ -617,7 +719,7 @@ static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){
** weekday N where 0==Sunday, 1==Monday, and so forth. If the
** date is already on the appropriate weekday, this is a no-op.
*/
- if( strncmp(z, "weekday ", 8)==0
+ if( sqlite3_strnicmp(z, "weekday ", 8)==0
&& sqlite3AtoF(&z[8], &r, sqlite3Strlen30(&z[8]), SQLITE_UTF8)
&& (n=(int)r)==r && n>=0 && r<7 ){
sqlite3_int64 Z;
@@ -640,7 +742,7 @@ static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){
** Move the date backwards to the beginning of the current day,
** or month or year.
*/
- if( strncmp(z, "start of ", 9)!=0 ) break;
+ if( sqlite3_strnicmp(z, "start of ", 9)!=0 ) break;
z += 9;
computeYMD(p);
p->validHMS = 1;
@@ -648,15 +750,15 @@ static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){
p->s = 0.0;
p->validTZ = 0;
p->validJD = 0;
- if( strcmp(z,"month")==0 ){
+ if( sqlite3_stricmp(z,"month")==0 ){
p->D = 1;
rc = 0;
- }else if( strcmp(z,"year")==0 ){
+ }else if( sqlite3_stricmp(z,"year")==0 ){
computeYMD(p);
p->M = 1;
p->D = 1;
rc = 0;
- }else if( strcmp(z,"day")==0 ){
+ }else if( sqlite3_stricmp(z,"day")==0 ){
rc = 0;
}
break;
@@ -674,6 +776,7 @@ static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){
case '8':
case '9': {
double rRounder;
+ int i;
for(n=1; z[n] && z[n]!=':' && !sqlite3Isspace(z[n]); n++){}
if( !sqlite3AtoF(z, &r, n, SQLITE_UTF8) ){
rc = 1;
@@ -702,46 +805,48 @@ static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){
rc = 0;
break;
}
+
+ /* If control reaches this point, it means the transformation is
+ ** one of the forms like "+NNN days". */
z += n;
while( sqlite3Isspace(*z) ) z++;
n = sqlite3Strlen30(z);
if( n>10 || n<3 ) break;
- if( z[n-1]=='s' ){ z[n-1] = 0; n--; }
+ if( sqlite3UpperToLower[(u8)z[n-1]]=='s' ) n--;
computeJD(p);
- rc = 0;
+ rc = 1;
rRounder = r<0 ? -0.5 : +0.5;
- if( n==3 && strcmp(z,"day")==0 ){
- p->iJD += (sqlite3_int64)(r*86400000.0 + rRounder);
- }else if( n==4 && strcmp(z,"hour")==0 ){
- p->iJD += (sqlite3_int64)(r*(86400000.0/24.0) + rRounder);
- }else if( n==6 && strcmp(z,"minute")==0 ){
- p->iJD += (sqlite3_int64)(r*(86400000.0/(24.0*60.0)) + rRounder);
- }else if( n==6 && strcmp(z,"second")==0 ){
- p->iJD += (sqlite3_int64)(r*(86400000.0/(24.0*60.0*60.0)) + rRounder);
- }else if( n==5 && strcmp(z,"month")==0 ){
- int x, y;
- computeYMD_HMS(p);
- p->M += (int)r;
- x = p->M>0 ? (p->M-1)/12 : (p->M-12)/12;
- p->Y += x;
- p->M -= x*12;
- p->validJD = 0;
- computeJD(p);
- y = (int)r;
- if( y!=r ){
- p->iJD += (sqlite3_int64)((r - y)*30.0*86400000.0 + rRounder);
- }
- }else if( n==4 && strcmp(z,"year")==0 ){
- int y = (int)r;
- computeYMD_HMS(p);
- p->Y += y;
- p->validJD = 0;
- computeJD(p);
- if( y!=r ){
- p->iJD += (sqlite3_int64)((r - y)*365.0*86400000.0 + rRounder);
+ for(i=0; i<ArraySize(aXformType); i++){
+ if( aXformType[i].nName==n
+ && sqlite3_strnicmp(aXformType[i].zName, z, n)==0
+ && r>-aXformType[i].rLimit && r<aXformType[i].rLimit
+ ){
+ switch( aXformType[i].eType ){
+ case 1: { /* Special processing to add months */
+ int x;
+ computeYMD_HMS(p);
+ p->M += (int)r;
+ x = p->M>0 ? (p->M-1)/12 : (p->M-12)/12;
+ p->Y += x;
+ p->M -= x*12;
+ p->validJD = 0;
+ r -= (int)r;
+ break;
+ }
+ case 2: { /* Special processing to add years */
+ int y = (int)r;
+ computeYMD_HMS(p);
+ p->Y += y;
+ p->validJD = 0;
+ r -= (int)r;
+ break;
+ }
+ }
+ computeJD(p);
+ p->iJD += (sqlite3_int64)(r*aXformType[i].rXform + rRounder);
+ rc = 0;
+ break;
}
- }else{
- rc = 1;
}
clearYMD_HMS_TZ(p);
break;
@@ -768,7 +873,7 @@ static int isDate(
sqlite3_value **argv,
DateTime *p
){
- int i;
+ int i, n;
const unsigned char *z;
int eType;
memset(p, 0, sizeof(*p));
@@ -777,8 +882,7 @@ static int isDate(
}
if( (eType = sqlite3_value_type(argv[0]))==SQLITE_FLOAT
|| eType==SQLITE_INTEGER ){
- p->iJD = (sqlite3_int64)(sqlite3_value_double(argv[0])*86400000.0 + 0.5);
- p->validJD = 1;
+ setRawDateNumber(p, sqlite3_value_double(argv[0]));
}else{
z = sqlite3_value_text(argv[0]);
if( !z || parseDateOrTime(context, (char*)z, p) ){
@@ -787,8 +891,11 @@ static int isDate(
}
for(i=1; i<argc; i++){
z = sqlite3_value_text(argv[i]);
- if( z==0 || parseModifier(context, (char*)z, p) ) return 1;
+ n = sqlite3_value_bytes(argv[i]);
+ if( z==0 || parseModifier(context, (char*)z, n, p) ) return 1;
}
+ computeJD(p);
+ if( p->isError || !validJulianDay(p->iJD) ) return 1;
return 0;
}
@@ -951,7 +1058,7 @@ static void strftimeFunc(
sqlite3_result_error_toobig(context);
return;
}else{
- z = sqlite3DbMallocRaw(db, (int)n);
+ z = sqlite3DbMallocRawNN(db, (int)n);
if( z==0 ){
sqlite3_result_error_nomem(context);
return;
@@ -1087,7 +1194,6 @@ static void currentTimeFunc(
){
time_t t;
char *zFormat = (char *)sqlite3_user_data(context);
- sqlite3 *db;
sqlite3_int64 iT;
struct tm *pTm;
struct tm sNow;
@@ -1120,7 +1226,7 @@ static void currentTimeFunc(
** external linkage.
*/
void sqlite3RegisterDateTimeFunctions(void){
- static SQLITE_WSD FuncDef aDateTimeFuncs[] = {
+ static FuncDef aDateTimeFuncs[] = {
#ifndef SQLITE_OMIT_DATETIME_FUNCS
DFUNCTION(julianday, -1, 0, 0, juliandayFunc ),
DFUNCTION(date, -1, 0, 0, dateFunc ),
@@ -1136,11 +1242,5 @@ void sqlite3RegisterDateTimeFunctions(void){
STR_FUNCTION(current_timestamp, 0, "%Y-%m-%d %H:%M:%S", 0, currentTimeFunc),
#endif
};
- int i;
- FuncDefHash *pHash = &GLOBAL(FuncDefHash, sqlite3GlobalFunctions);
- FuncDef *aFunc = (FuncDef*)&GLOBAL(FuncDef, aDateTimeFuncs);
-
- for(i=0; i<ArraySize(aDateTimeFuncs); i++){
- sqlite3FuncDefInsert(pHash, &aFunc[i]);
- }
+ sqlite3InsertBuiltinFuncs(aDateTimeFuncs, ArraySize(aDateTimeFuncs));
}
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