Use cythonize for build

pandas/_libs/internals.pyx

@@ -12,7 +12,7 @@ cdef extern from "Python.h":
 import numpy as np
 from numpy cimport int64_t
 
-cdef extern from "compat_helper.h":
+cdef extern from "src/compat_helper.h":
     cdef int slice_get_indices(PyObject* s, Py_ssize_t length,
                                Py_ssize_t *start, Py_ssize_t *stop,
                                Py_ssize_t *step,

pandas/_libs/khash.pxd

@@ -3,7 +3,7 @@
 from cpython cimport PyObject
 from numpy cimport int64_t, uint64_t, int32_t, uint32_t, float64_t
 
-cdef extern from "khash_python.h":
+cdef extern from "src/klib/khash_python.h":
     ctypedef uint32_t khint_t
     ctypedef khint_t khiter_t
 

pandas/_libs/lib.pyx

@@ -914,4 +914,4 @@ def indices_fast(object index, ndarray[int64_t] labels, list keys,
     return result
 
 
-include "inference.pyx"
+include "src/inference.pyx"

pandas/_libs/parsers.pyx

@@ -72,7 +72,7 @@ cdef double NEGINF = -INF
 cdef extern from "errno.h":
     int errno
 
-cdef extern from "headers/portable.h":
+cdef extern from "src/headers/portable.h":
     # I *think* this is here so that strcasecmp is defined on Windows
     # so we don't get
     # `parsers.obj : error LNK2001: unresolved external symbol strcasecmp`
@@ -87,7 +87,7 @@ except NameError:
     basestring = str
 
 
-cdef extern from "parser/tokenizer.h":
+cdef extern from "src/parser/tokenizer.h":
 
     ctypedef enum ParserState:
         START_RECORD
@@ -243,7 +243,7 @@ cdef extern from "parser/tokenizer.h":
     int to_boolean(const char *item, uint8_t *val) nogil
 
 
-cdef extern from "parser/io.h":
+cdef extern from "src/parser/io.h":
     void *new_mmap(char *fname)
     int del_mmap(void *src)
     void* buffer_mmap_bytes(void *source, size_t nbytes,

pandas/_libs/src/parser/tokenizer.h

@@ -28,7 +28,7 @@ See LICENSE for the license
 
 #include "../headers/stdint.h"
 
-#include "khash.h"
+#include "../klib/khash.h"
 
 #define CHUNKSIZE 1024 * 256
 #define KB 1024

pandas/_libs/tslib.pyx

@@ -25,9 +25,7 @@ from tslibs.np_datetime cimport (check_dts_bounds,
                                  _string_to_dts,
                                  dt64_to_dtstruct, dtstruct_to_dt64,
                                  pydatetime_to_dt64, pydate_to_dt64,
-                                 get_datetime64_value,
-                                 days_per_month_table,
-                                 dayofweek, is_leapyear)
+                                 get_datetime64_value)
 from tslibs.np_datetime import OutOfBoundsDatetime
 
 from tslibs.parsing import parse_datetime_string
@@ -40,6 +38,7 @@ import pytz
 UTC = pytz.utc
 
 
+from tslibs.ccalendar cimport get_days_in_month, dayofweek
 from tslibs.timedeltas cimport cast_from_unit
 from tslibs.timedeltas import Timedelta
 from tslibs.timezones cimport (is_utc, is_tzlocal, is_fixed_offset,
@@ -749,7 +748,7 @@ def monthrange(int64_t year, int64_t month):
     if month < 1 or month > 12:
         raise ValueError("bad month number 0; must be 1-12")
 
-    days = days_per_month_table[is_leapyear(year)][month - 1]
+    days = get_days_in_month(year, month)
 
     return (dayofweek(year, month, 1), days)
 

pandas/_libs/tslibs/np_datetime.pxd

@@ -54,7 +54,6 @@ cdef extern from "../src/datetime/np_datetime.h":
                                            PANDAS_DATETIMEUNIT fr,
                                            pandas_datetimestruct *result) nogil
 
-    int days_per_month_table[2][12]
     int dayofweek(int y, int m, int d) nogil
     int is_leapyear(int64_t year) nogil
 

pandas/_libs/tslibs/offsets.pyx

@@ -18,12 +18,12 @@ cnp.import_array()
 from util cimport is_string_object, is_integer_object
 
 from ccalendar import MONTHS, DAYS
+from ccalendar cimport get_days_in_month, dayofweek
 from conversion cimport tz_convert_single, pydt_to_i8
 from frequencies cimport get_freq_code
 from nattype cimport NPY_NAT
 from np_datetime cimport (pandas_datetimestruct,
-                          dtstruct_to_dt64, dt64_to_dtstruct,
-                          is_leapyear, days_per_month_table, dayofweek)
+                          dtstruct_to_dt64, dt64_to_dtstruct)
 
 # ---------------------------------------------------------------------
 # Constants
@@ -390,12 +390,6 @@ class BaseOffset(_BaseOffset):
 # ----------------------------------------------------------------------
 # RelativeDelta Arithmetic
 
-@cython.wraparound(False)
-@cython.boundscheck(False)
-cdef inline int get_days_in_month(int year, int month) nogil:
-    return days_per_month_table[is_leapyear(year)][month - 1]
-
-
 cdef inline int year_add_months(pandas_datetimestruct dts, int months) nogil:
     """new year number after shifting pandas_datetimestruct number of months"""
     return dts.year + (dts.month + months - 1) / 12

pandas/_libs/tslibs/period.pyx

@@ -22,10 +22,10 @@ from cpython.datetime cimport PyDateTime_Check, PyDateTime_IMPORT
 PyDateTime_IMPORT
 
 from np_datetime cimport (pandas_datetimestruct, dtstruct_to_dt64,
-                          dt64_to_dtstruct, is_leapyear)
+                          dt64_to_dtstruct)
 
 cimport util
-from util cimport is_period_object, is_string_object, INT32_MIN
+from util cimport is_period_object, is_string_object
 
 from pandas._libs.missing cimport is_null_datetimelike
 
@@ -34,6 +34,7 @@ from timezones cimport is_utc, is_tzlocal, get_utcoffset, get_dst_info
 from timedeltas cimport delta_to_nanoseconds
 
 from ccalendar import MONTH_NUMBERS
+from ccalendar cimport is_leapyear
 from frequencies cimport (get_freq_code, get_base_alias,
                           get_to_timestamp_base, get_freq_str,
                           get_rule_month)
@@ -46,7 +47,13 @@ from pandas.tseries import offsets
 from pandas.tseries import frequencies
 
 
-cdef extern from "period_helper.h":
+cdef extern from "../src/numpy_helper.h":
+    object char_to_string(char*)
+
+cdef extern from "../src/headers/stdint.h":
+    enum: INT32_MIN
+
+cdef extern from "../src/period_helper.h":
     ctypedef struct date_info:
         int64_t absdate
         double abstime
@@ -339,7 +346,7 @@ cdef object _period_strftime(int64_t value, int freq, object fmt):
 
     formatted = c_strftime(&dinfo, <char*> fmt)
 
-    result = util.char_to_string(formatted)
+    result = char_to_string(formatted)
     free(formatted)
 
     for i in range(len(extra_fmts)):