diff --git a/Python/pyctype.c b/Python/pyctype.c
new file mode 100644
index 0000000..da117d5
--- /dev/null
+++ b/Python/pyctype.c
@@ -0,0 +1,214 @@
+#include "Python.h"
+
+/* Our own locale-independent ctype.h-like macros */
+
+const unsigned int _Py_ctype_table[256] = {
+    0, /* 0x0 '\x00' */
+    0, /* 0x1 '\x01' */
+    0, /* 0x2 '\x02' */
+    0, /* 0x3 '\x03' */
+    0, /* 0x4 '\x04' */
+    0, /* 0x5 '\x05' */
+    0, /* 0x6 '\x06' */
+    0, /* 0x7 '\x07' */
+    0, /* 0x8 '\x08' */
+    PY_CTF_SPACE, /* 0x9 '\t' */
+    PY_CTF_SPACE, /* 0xa '\n' */
+    PY_CTF_SPACE, /* 0xb '\v' */
+    PY_CTF_SPACE, /* 0xc '\f' */
+    PY_CTF_SPACE, /* 0xd '\r' */
+    0, /* 0xe '\x0e' */
+    0, /* 0xf '\x0f' */
+    0, /* 0x10 '\x10' */
+    0, /* 0x11 '\x11' */
+    0, /* 0x12 '\x12' */
+    0, /* 0x13 '\x13' */
+    0, /* 0x14 '\x14' */
+    0, /* 0x15 '\x15' */
+    0, /* 0x16 '\x16' */
+    0, /* 0x17 '\x17' */
+    0, /* 0x18 '\x18' */
+    0, /* 0x19 '\x19' */
+    0, /* 0x1a '\x1a' */
+    0, /* 0x1b '\x1b' */
+    0, /* 0x1c '\x1c' */
+    0, /* 0x1d '\x1d' */
+    0, /* 0x1e '\x1e' */
+    0, /* 0x1f '\x1f' */
+    PY_CTF_SPACE, /* 0x20 ' ' */
+    0, /* 0x21 '!' */
+    0, /* 0x22 '"' */
+    0, /* 0x23 '#' */
+    0, /* 0x24 '$' */
+    0, /* 0x25 '%' */
+    0, /* 0x26 '&' */
+    0, /* 0x27 "'" */
+    0, /* 0x28 '(' */
+    0, /* 0x29 ')' */
+    0, /* 0x2a '*' */
+    0, /* 0x2b '+' */
+    0, /* 0x2c ',' */
+    0, /* 0x2d '-' */
+    0, /* 0x2e '.' */
+    0, /* 0x2f '/' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x30 '0' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x31 '1' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x32 '2' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x33 '3' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x34 '4' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x35 '5' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x36 '6' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x37 '7' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x38 '8' */
+    PY_CTF_DIGIT|PY_CTF_XDIGIT, /* 0x39 '9' */
+    0, /* 0x3a ':' */
+    0, /* 0x3b ';' */
+    0, /* 0x3c '<' */
+    0, /* 0x3d '=' */
+    0, /* 0x3e '>' */
+    0, /* 0x3f '?' */
+    0, /* 0x40 '@' */
+    PY_CTF_UPPER|PY_CTF_XDIGIT, /* 0x41 'A' */
+    PY_CTF_UPPER|PY_CTF_XDIGIT, /* 0x42 'B' */
+    PY_CTF_UPPER|PY_CTF_XDIGIT, /* 0x43 'C' */
+    PY_CTF_UPPER|PY_CTF_XDIGIT, /* 0x44 'D' */
+    PY_CTF_UPPER|PY_CTF_XDIGIT, /* 0x45 'E' */
+    PY_CTF_UPPER|PY_CTF_XDIGIT, /* 0x46 'F' */
+    PY_CTF_UPPER, /* 0x47 'G' */
+    PY_CTF_UPPER, /* 0x48 'H' */
+    PY_CTF_UPPER, /* 0x49 'I' */
+    PY_CTF_UPPER, /* 0x4a 'J' */
+    PY_CTF_UPPER, /* 0x4b 'K' */
+    PY_CTF_UPPER, /* 0x4c 'L' */
+    PY_CTF_UPPER, /* 0x4d 'M' */
+    PY_CTF_UPPER, /* 0x4e 'N' */
+    PY_CTF_UPPER, /* 0x4f 'O' */
+    PY_CTF_UPPER, /* 0x50 'P' */
+    PY_CTF_UPPER, /* 0x51 'Q' */
+    PY_CTF_UPPER, /* 0x52 'R' */
+    PY_CTF_UPPER, /* 0x53 'S' */
+    PY_CTF_UPPER, /* 0x54 'T' */
+    PY_CTF_UPPER, /* 0x55 'U' */
+    PY_CTF_UPPER, /* 0x56 'V' */
+    PY_CTF_UPPER, /* 0x57 'W' */
+    PY_CTF_UPPER, /* 0x58 'X' */
+    PY_CTF_UPPER, /* 0x59 'Y' */
+    PY_CTF_UPPER, /* 0x5a 'Z' */
+    0, /* 0x5b '[' */
+    0, /* 0x5c '\\' */
+    0, /* 0x5d ']' */
+    0, /* 0x5e '^' */
+    0, /* 0x5f '_' */
+    0, /* 0x60 '`' */
+    PY_CTF_LOWER|PY_CTF_XDIGIT, /* 0x61 'a' */
+    PY_CTF_LOWER|PY_CTF_XDIGIT, /* 0x62 'b' */
+    PY_CTF_LOWER|PY_CTF_XDIGIT, /* 0x63 'c' */
+    PY_CTF_LOWER|PY_CTF_XDIGIT, /* 0x64 'd' */
+    PY_CTF_LOWER|PY_CTF_XDIGIT, /* 0x65 'e' */
+    PY_CTF_LOWER|PY_CTF_XDIGIT, /* 0x66 'f' */
+    PY_CTF_LOWER, /* 0x67 'g' */
+    PY_CTF_LOWER, /* 0x68 'h' */
+    PY_CTF_LOWER, /* 0x69 'i' */
+    PY_CTF_LOWER, /* 0x6a 'j' */
+    PY_CTF_LOWER, /* 0x6b 'k' */
+    PY_CTF_LOWER, /* 0x6c 'l' */
+    PY_CTF_LOWER, /* 0x6d 'm' */
+    PY_CTF_LOWER, /* 0x6e 'n' */
+    PY_CTF_LOWER, /* 0x6f 'o' */
+    PY_CTF_LOWER, /* 0x70 'p' */
+    PY_CTF_LOWER, /* 0x71 'q' */
+    PY_CTF_LOWER, /* 0x72 'r' */
+    PY_CTF_LOWER, /* 0x73 's' */
+    PY_CTF_LOWER, /* 0x74 't' */
+    PY_CTF_LOWER, /* 0x75 'u' */
+    PY_CTF_LOWER, /* 0x76 'v' */
+    PY_CTF_LOWER, /* 0x77 'w' */
+    PY_CTF_LOWER, /* 0x78 'x' */
+    PY_CTF_LOWER, /* 0x79 'y' */
+    PY_CTF_LOWER, /* 0x7a 'z' */
+    0, /* 0x7b '{' */
+    0, /* 0x7c '|' */
+    0, /* 0x7d '}' */
+    0, /* 0x7e '~' */
+    0, /* 0x7f '\x7f' */
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+
+const unsigned char _Py_ctype_tolower[256] = {
+    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+    0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+    0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+    0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+    0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
+    0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+    0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+    0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
+    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+    0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+    0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+    0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+    0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+    0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
+    0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
+    0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
+    0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
+    0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
+    0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
+    0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
+    0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
+    0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+    0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+};
+
+const unsigned char _Py_ctype_toupper[256] = {
+    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+    0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+    0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+    0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+    0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+    0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
+    0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+    0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+    0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+    0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
+    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+    0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+    0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+    0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+    0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+    0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
+    0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
+    0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
+    0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
+    0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
+    0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
+    0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
+    0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
+    0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+    0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+};
+
diff --git a/Python/pystrtod.c b/Python/pystrtod.c
index ea7f1f5..e677305 100644
--- a/Python/pystrtod.c
+++ b/Python/pystrtod.c
@@ -3,12 +3,6 @@
 #include <Python.h>
 #include <locale.h>
 
-/* ascii character tests (as opposed to locale tests) */
-#define ISSPACE(c)  ((c) == ' ' || (c) == '\f' || (c) == '\n' || \
-                     (c) == '\r' || (c) == '\t' || (c) == '\v')
-#define ISDIGIT(c)  ((c) >= '0' && (c) <= '9')
-
-
 /**
  * PyOS_ascii_strtod:
  * @nptr:    the string to convert to a numeric value.
@@ -81,7 +75,7 @@
 
 	p = nptr;
 	/* Skip leading space */
-	while (ISSPACE(*p))
+	while (Py_ISSPACE(*p))
 		p++;
 
 	/* Process leading sign, if present */
@@ -124,7 +118,7 @@
 		goto invalid_string;
 
 	/* Check that what's left begins with a digit or decimal point */
-	if (!ISDIGIT(*p) && *p != '.')
+	if (!Py_ISDIGIT(*p) && *p != '.')
 		goto invalid_string;
 
 	digits_pos = p;
@@ -135,7 +129,7 @@
 		   swapped for the current locale's decimal point before we
 		   call strtod.  On the other hand, if we find the current
 		   locale's decimal point then the input is invalid. */
-		while (ISDIGIT(*p))
+		while (Py_ISDIGIT(*p))
 			p++;
 
 		if (*p == '.')
@@ -143,14 +137,14 @@
 			decimal_point_pos = p++;
 
 			/* locate end of number */
-			while (ISDIGIT(*p))
+			while (Py_ISDIGIT(*p))
 				p++;
 
 			if (*p == 'e' || *p == 'E')
 				p++;
 			if (*p == '+' || *p == '-')
 				p++;
-			while (ISDIGIT(*p))
+			while (Py_ISDIGIT(*p))
 				p++;
 			end = p;
 		}
@@ -244,7 +238,7 @@
 
 		if (*buffer == '+' || *buffer == '-')
 			buffer++;
-		while (isdigit(Py_CHARMASK(*buffer)))
+		while (Py_ISDIGIT(*buffer))
 			buffer++;
 		if (strncmp(buffer, decimal_point, decimal_point_len) == 0) {
 			*buffer = '.';
@@ -306,7 +300,7 @@
 
 		/* Find the end of the exponent, keeping track of leading
 		   zeros. */
-		while (*p && isdigit(Py_CHARMASK(*p))) {
+		while (*p && Py_ISDIGIT(*p)) {
 			if (in_leading_zeros && *p == '0')
 				++leading_zero_cnt;
 			if (*p != '0')
@@ -369,11 +363,11 @@
 		/* Skip leading sign, if present.  I think this could only
 		   ever be '-', but it can't hurt to check for both. */
 		++p;
-	while (*p && isdigit(Py_CHARMASK(*p)))
+	while (*p && Py_ISDIGIT(*p))
 		++p;
 
 	if (*p == '.') {
-		if (isdigit(Py_CHARMASK(*(p+1)))) {
+		if (Py_ISDIGIT(*(p+1))) {
 			/* Nothing to do, we already have a decimal
 			   point and a digit after it */
 		}