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transition period_helper to use pandas_datetimestruct #19918

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merged 8 commits into from
Mar 4, 2018
Merged

transition period_helper to use pandas_datetimestruct #19918

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2a22d6a
transition period_helper to use pandas_datetimestruct
jbrockmendel Feb 26, 2018
3cbff92
troubleshoot appveyor err
jbrockmendel Feb 27, 2018
31fa86f
Merge branch 'master' of https://github.com/pandas-dev/pandas into ph…
jbrockmendel Feb 27, 2018
737333d
Merge branch 'master' of https://github.com/pandas-dev/pandas into ph…
jbrockmendel Feb 28, 2018
b99596d
declare ints earlier
jbrockmendel Feb 28, 2018
bc82a76
docstring
jbrockmendel Feb 28, 2018
a165356
Fixup declarations
jbrockmendel Mar 1, 2018
e16dd3e
Merge branch 'master' of https://github.com/pandas-dev/pandas into ph…
jbrockmendel Mar 1, 2018
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113 changes: 52 additions & 61 deletions pandas/_libs/src/period_helper.c
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Original file line number Diff line number Diff line change
Expand Up @@ -58,18 +58,6 @@ npy_int64 unix_date_from_ymd(int year, int month, int day) {
return unix_date;
}

/* Sets the date part of the date_info struct
Assumes GREGORIAN_CALENDAR */
static int dInfoCalc_SetFromAbsDate(register struct date_info *dinfo,
npy_int64 unix_date) {
pandas_datetimestruct dts;

pandas_datetime_to_datetimestruct(unix_date, PANDAS_FR_D, &dts);
dinfo->year = dts.year;
dinfo->month = dts.month;
dinfo->day = dts.day;
return 0;
}

///////////////////////////////////////////////

Expand Down Expand Up @@ -139,9 +127,9 @@ static npy_int64 DtoB_weekday(npy_int64 unix_date) {
return floordiv(unix_date + 4, 7) * 5 + mod_compat(unix_date + 4, 7) - 4;
}

static npy_int64 DtoB(struct date_info *dinfo,
static npy_int64 DtoB(pandas_datetimestruct *dts,
int roll_back, npy_int64 unix_date) {
int day_of_week = dayofweek(dinfo->year, dinfo->month, dinfo->day);
int day_of_week = dayofweek(dts->year, dts->month, dts->day);

if (roll_back == 1) {
if (day_of_week > 4) {
Expand All @@ -161,32 +149,32 @@ static npy_int64 DtoB(struct date_info *dinfo,
//************ FROM DAILY ***************

static npy_int64 asfreq_DTtoA(npy_int64 ordinal, asfreq_info *af_info) {
struct date_info dinfo;
pandas_datetimestruct dts;
ordinal = downsample_daytime(ordinal, af_info);
dInfoCalc_SetFromAbsDate(&dinfo, ordinal);
if (dinfo.month > af_info->to_a_year_end) {
return (npy_int64)(dinfo.year + 1 - 1970);
pandas_datetime_to_datetimestruct(ordinal, PANDAS_FR_D, &dts);
if (dts.month > af_info->to_end) {
return (npy_int64)(dts.year + 1 - 1970);
} else {
return (npy_int64)(dinfo.year - 1970);
return (npy_int64)(dts.year - 1970);
}
}

static int DtoQ_yq(npy_int64 ordinal, asfreq_info *af_info, int *year) {
struct date_info dinfo;
pandas_datetimestruct dts;
int quarter;

dInfoCalc_SetFromAbsDate(&dinfo, ordinal);
if (af_info->to_q_year_end != 12) {
dinfo.month -= af_info->to_q_year_end;
if (dinfo.month <= 0) {
dinfo.month += 12;
pandas_datetime_to_datetimestruct(ordinal, PANDAS_FR_D, &dts);
if (af_info->to_end != 12) {
dts.month -= af_info->to_end;
if (dts.month <= 0) {
dts.month += 12;
} else {
dinfo.year += 1;
dts.year += 1;
}
}

*year = dinfo.year;
quarter = monthToQuarter(dinfo.month);
*year = dts.year;
quarter = monthToQuarter(dts.month);
return quarter;
}

Expand All @@ -200,29 +188,28 @@ static npy_int64 asfreq_DTtoQ(npy_int64 ordinal, asfreq_info *af_info) {
}

static npy_int64 asfreq_DTtoM(npy_int64 ordinal, asfreq_info *af_info) {
struct date_info dinfo;
pandas_datetimestruct dts;

ordinal = downsample_daytime(ordinal, af_info);

dInfoCalc_SetFromAbsDate(&dinfo, ordinal);
return (npy_int64)((dinfo.year - 1970) * 12 + dinfo.month - 1);
pandas_datetime_to_datetimestruct(ordinal, PANDAS_FR_D, &dts);
return (npy_int64)((dts.year - 1970) * 12 + dts.month - 1);
}

static npy_int64 asfreq_DTtoW(npy_int64 ordinal, asfreq_info *af_info) {
ordinal = downsample_daytime(ordinal, af_info);
return floordiv(ordinal + 3 - af_info->to_week_end, 7) + 1;
return floordiv(ordinal + 3 - af_info->to_end, 7) + 1;
}

static npy_int64 asfreq_DTtoB(npy_int64 ordinal, asfreq_info *af_info) {
struct date_info dinfo;
int roll_back;

ordinal = downsample_daytime(ordinal, af_info);
dInfoCalc_SetFromAbsDate(&dinfo, ordinal);
pandas_datetimestruct dts;
npy_int64 unix_date = downsample_daytime(ordinal, af_info);
pandas_datetime_to_datetimestruct(unix_date, PANDAS_FR_D, &dts);

// This usage defines roll_back the opposite way from the others
roll_back = 1 - af_info->is_end;
return DtoB(&dinfo, roll_back, ordinal);
return DtoB(&dts, roll_back, unix_date);
}

//************ FROM BUSINESS ***************
Expand Down Expand Up @@ -252,7 +239,7 @@ static npy_int64 asfreq_BtoW(npy_int64 ordinal, asfreq_info *af_info) {
//************ FROM WEEKLY ***************

static npy_int64 asfreq_WtoDT(npy_int64 ordinal, asfreq_info *af_info) {
ordinal = ordinal * 7 + af_info->from_week_end - 4 +
ordinal = ordinal * 7 + af_info->from_end - 4 +
(7 - 1) * (af_info->is_end - 1);
return upsample_daytime(ordinal, af_info);
}
Expand All @@ -274,12 +261,13 @@ static npy_int64 asfreq_WtoW(npy_int64 ordinal, asfreq_info *af_info) {
}

static npy_int64 asfreq_WtoB(npy_int64 ordinal, asfreq_info *af_info) {
struct date_info dinfo;
int roll_back;
pandas_datetimestruct dts;
npy_int64 unix_date = asfreq_WtoDT(ordinal, af_info);

int roll_back = af_info->is_end;
dInfoCalc_SetFromAbsDate(&dinfo, unix_date);
return DtoB(&dinfo, roll_back, unix_date);
pandas_datetime_to_datetimestruct(unix_date, PANDAS_FR_D, &dts);
roll_back = af_info->is_end;
return DtoB(&dts, roll_back, unix_date);
}

//************ FROM MONTHLY ***************
Expand Down Expand Up @@ -313,12 +301,13 @@ static npy_int64 asfreq_MtoW(npy_int64 ordinal, asfreq_info *af_info) {
}

static npy_int64 asfreq_MtoB(npy_int64 ordinal, asfreq_info *af_info) {
struct date_info dinfo;
int roll_back;
pandas_datetimestruct dts;
npy_int64 unix_date = asfreq_MtoDT(ordinal, af_info);

int roll_back = af_info->is_end;
dInfoCalc_SetFromAbsDate(&dinfo, unix_date);
return DtoB(&dinfo, roll_back, unix_date);
pandas_datetime_to_datetimestruct(unix_date, PANDAS_FR_D, &dts);
roll_back = af_info->is_end;
return DtoB(&dts, roll_back, unix_date);
}

//************ FROM QUARTERLY ***************
Expand All @@ -328,8 +317,8 @@ static void QtoD_ym(npy_int64 ordinal, int *year, int *month,
*year = floordiv(ordinal, 4) + 1970;
*month = mod_compat(ordinal, 4) * 3 + 1;

if (af_info->from_q_year_end != 12) {
*month += af_info->from_q_year_end;
if (af_info->from_end != 12) {
*month += af_info->from_end;
if (*month > 12) {
*month -= 12;
} else {
Expand Down Expand Up @@ -367,23 +356,24 @@ static npy_int64 asfreq_QtoW(npy_int64 ordinal, asfreq_info *af_info) {
}

static npy_int64 asfreq_QtoB(npy_int64 ordinal, asfreq_info *af_info) {
struct date_info dinfo;
int roll_back;
pandas_datetimestruct dts;
npy_int64 unix_date = asfreq_QtoDT(ordinal, af_info);

int roll_back = af_info->is_end;
dInfoCalc_SetFromAbsDate(&dinfo, unix_date);
return DtoB(&dinfo, roll_back, unix_date);
pandas_datetime_to_datetimestruct(unix_date, PANDAS_FR_D, &dts);
roll_back = af_info->is_end;
return DtoB(&dts, roll_back, unix_date);
}

//************ FROM ANNUAL ***************

static void AtoD_ym(npy_int64 ordinal, int *year, int *month,
static void AtoD_ym(npy_int64 ordinal, npy_int64 *year, int *month,
asfreq_info *af_info) {
*year = ordinal + 1970;
*month = 1;

if (af_info->from_a_year_end != 12) {
*month += af_info->from_a_year_end;
if (af_info->from_end != 12) {
*month += af_info->from_end;
if (*month > 12) {
// This case is never reached, but is kept for symmetry
// with QtoD_ym
Expand All @@ -395,8 +385,8 @@ static void AtoD_ym(npy_int64 ordinal, int *year, int *month,
}

static npy_int64 asfreq_AtoDT(npy_int64 ordinal, asfreq_info *af_info) {
npy_int64 unix_date;
int year, month;
npy_int64 unix_date, year;
int month;

ordinal += af_info->is_end;
AtoD_ym(ordinal, &year, &month, af_info);
Expand All @@ -423,12 +413,13 @@ static npy_int64 asfreq_AtoW(npy_int64 ordinal, asfreq_info *af_info) {
}

static npy_int64 asfreq_AtoB(npy_int64 ordinal, asfreq_info *af_info) {
struct date_info dinfo;
int roll_back;
pandas_datetimestruct dts;
npy_int64 unix_date = asfreq_AtoDT(ordinal, af_info);

int roll_back = af_info->is_end;
dInfoCalc_SetFromAbsDate(&dinfo, unix_date);
return DtoB(&dinfo, roll_back, unix_date);
pandas_datetime_to_datetimestruct(unix_date, PANDAS_FR_D, &dts);
roll_back = af_info->is_end;
return DtoB(&dts, roll_back, unix_date);
}

static npy_int64 nofunc(npy_int64 ordinal, asfreq_info *af_info) {
Expand Down
30 changes: 13 additions & 17 deletions pandas/_libs/src/period_helper.h
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Original file line number Diff line number Diff line change
Expand Up @@ -81,27 +81,23 @@ typedef struct asfreq_info {
// char relation == 'S' (for START) --> is_end = 0
// char relation == 'E' (for END) --> is_end = 1

int from_week_end; // day the week ends on in the "from" frequency
int to_week_end; // day the week ends on in the "to" frequency

int from_a_year_end; // month the year ends on in the "from" frequency
int to_a_year_end; // month the year ends on in the "to" frequency

int from_q_year_end; // month the year ends on in the "from" frequency
int to_q_year_end; // month the year ends on in the "to" frequency
int from_end;
int to_end;
// weekly:
// from_end --> day the week ends on in the "from" frequency
// to_end --> day the week ends on in the "to" frequency
//
// annual:
// from_end --> month the year ends on in the "from" frequency
// to_end --> month the year ends on in the "to" frequency
//
// quarterly:
// from_end --> month the year ends on in the "from" frequency
// to_end --> month the year ends on in the "to" frequency

npy_int64 intraday_conversion_factor;
} asfreq_info;

typedef struct date_info {
double second;
int minute;
int hour;
int day;
int month;
int year;
} date_info;

typedef npy_int64 (*freq_conv_func)(npy_int64, asfreq_info *af_info);

/*
Expand Down
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