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Fix #167: Port ast27 to Python 3.11 #176

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Dec 2, 2021
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Fix #167: Port ast27 to Python 3.11 #176

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42 changes: 34 additions & 8 deletions ast27/Python/mystrtoul.c
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,32 @@ static int digitlimit[] = {
#error "Need table for SIZEOF_LONG"
#endif

/* Table of digit values for 8-bit string -> integer conversion.
* '0' maps to 0, ..., '9' maps to 9.
* 'a' and 'A' map to 10, ..., 'z' and 'Z' map to 35.
* All other indices map to 37.
* Note that when converting a base B string, a char c is a legitimate
* base B digit iff digitvalue[Py_CHARPyLong_MASK(c)] < B.
*/
unsigned char digitvalue[256] = {
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 37, 37, 37, 37, 37, 37,
37, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 37, 37, 37, 37,
37, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
};

/*
** strtoul
** This is a general purpose routine for converting
Expand Down Expand Up @@ -109,7 +135,7 @@ Ta27OS_strtoul(register char *str, char **ptr, int base)
++str;
if (*str == 'x' || *str == 'X') {
/* there must be at least one digit after 0x */
if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 16) {
if (digitvalue[Py_CHARMASK(str[1])] >= 16) {
if (ptr)
*ptr = str;
return 0;
Expand All @@ -118,7 +144,7 @@ Ta27OS_strtoul(register char *str, char **ptr, int base)
base = 16;
} else if (*str == 'o' || *str == 'O') {
/* there must be at least one digit after 0o */
if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 8) {
if (digitvalue[Py_CHARMASK(str[1])] >= 8) {
if (ptr)
*ptr = str;
return 0;
Expand All @@ -127,7 +153,7 @@ Ta27OS_strtoul(register char *str, char **ptr, int base)
base = 8;
} else if (*str == 'b' || *str == 'B') {
/* there must be at least one digit after 0b */
if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 2) {
if (digitvalue[Py_CHARMASK(str[1])] >= 2) {
if (ptr)
*ptr = str;
return 0;
Expand All @@ -147,7 +173,7 @@ Ta27OS_strtoul(register char *str, char **ptr, int base)
++str;
if (*str == 'b' || *str == 'B') {
/* there must be at least one digit after 0b */
if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 2) {
if (digitvalue[Py_CHARMASK(str[1])] >= 2) {
if (ptr)
*ptr = str;
return 0;
Expand All @@ -162,7 +188,7 @@ Ta27OS_strtoul(register char *str, char **ptr, int base)
++str;
if (*str == 'o' || *str == 'O') {
/* there must be at least one digit after 0o */
if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 8) {
if (digitvalue[Py_CHARMASK(str[1])] >= 8) {
if (ptr)
*ptr = str;
return 0;
Expand All @@ -177,7 +203,7 @@ Ta27OS_strtoul(register char *str, char **ptr, int base)
++str;
if (*str == 'x' || *str == 'X') {
/* there must be at least one digit after 0x */
if (_PyLong_DigitValue[Py_CHARMASK(str[1])] >= 16) {
if (digitvalue[Py_CHARMASK(str[1])] >= 16) {
if (ptr)
*ptr = str;
return 0;
Expand All @@ -203,7 +229,7 @@ Ta27OS_strtoul(register char *str, char **ptr, int base)
ovlimit = digitlimit[base];

/* do the conversion until non-digit character encountered */
while ((c = _PyLong_DigitValue[Py_CHARMASK(*str)]) < base) {
while ((c = digitvalue[Py_CHARMASK(*str)]) < base) {
if (ovlimit > 0) /* no overflow check required */
result = result * base + c;
else { /* requires overflow check */
Expand Down Expand Up @@ -240,7 +266,7 @@ Ta27OS_strtoul(register char *str, char **ptr, int base)
overflowed:
if (ptr) {
/* spool through remaining digit characters */
while (_PyLong_DigitValue[Py_CHARMASK(*str)] < base)
while (digitvalue[Py_CHARMASK(*str)] < base)
++str;
*ptr = str;
}
Expand Down