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Import Tcl 8.6.10

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This commit is contained in:
Steve Dower
2020-09-24 22:53:56 +01:00
parent 0343d03b22
commit 3bb8e3e086
1005 changed files with 593700 additions and 41637 deletions
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131
libtommath/bn_mp_read_radix.c
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@@ -1,88 +1,79 @@
#include <tommath.h>
#include "tommath_private.h"
#ifdef BN_MP_READ_RADIX_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis
*
* LibTomMath is a library that provides multiple-precision
* integer arithmetic as well as number theoretic functionality.
*
* The library was designed directly after the MPI library by
* Michael Fromberger but has been written from scratch with
* additional optimizations in place.
*
* The library is free for all purposes without any express
* guarantee it works.
*
* Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
*/
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
#define MP_TOUPPER(c) ((((c) >= 'a') && ((c) <= 'z')) ? (((c) + 'A') - 'a') : (c))
/* read a string [ASCII] in a given radix */
int mp_read_radix (mp_int * a, const char *str, int radix)
mp_err mp_read_radix(mp_int *a, const char *str, int radix)
{
int y, res, neg;
char ch;
mp_err err;
int y;
mp_sign neg;
unsigned pos;
char ch;
/* zero the digit bignum */
mp_zero(a);
/* zero the digit bignum */
mp_zero(a);
/* make sure the radix is ok */
if (radix < 2 || radix > 64) {
return MP_VAL;
}
/* make sure the radix is ok */
if ((radix < 2) || (radix > 64)) {
return MP_VAL;
}
/* if the leading digit is a
* minus set the sign to negative.
*/
if (*str == '-') {
++str;
neg = MP_NEG;
} else {
neg = MP_ZPOS;
}
/* if the leading digit is a
* minus set the sign to negative.
*/
if (*str == '-') {
++str;
neg = MP_NEG;
} else {
neg = MP_ZPOS;
}
/* set the integer to the default of zero */
mp_zero (a);
/* process each digit of the string */
while (*str) {
/* if the radix < 36 the conversion is case insensitive
* this allows numbers like 1AB and 1ab to represent the same value
* [e.g. in hex]
*/
ch = (char) ((radix < 36) ? toupper ((unsigned char) *str) : *str);
for (y = 0; y < 64; y++) {
if (ch == mp_s_rmap[y]) {
/* set the integer to the default of zero */
mp_zero(a);
/* process each digit of the string */
while (*str != '\0') {
/* if the radix <= 36 the conversion is case insensitive
* this allows numbers like 1AB and 1ab to represent the same value
* [e.g. in hex]
*/
ch = (radix <= 36) ? (char)MP_TOUPPER((int)*str) : *str;
pos = (unsigned)(ch - '(');
if (mp_s_rmap_reverse_sz < pos) {
break;
}
}
y = (int)mp_s_rmap_reverse[pos];
/* if the char was found in the map
* and is less than the given radix add it
* to the number, otherwise exit the loop.
*/
if (y < radix) {
if ((res = mp_mul_d (a, (mp_digit) radix, a)) != MP_OKAY) {
return res;
/* if the char was found in the map
* and is less than the given radix add it
* to the number, otherwise exit the loop.
*/
if ((y == 0xff) || (y >= radix)) {
break;
}
if ((res = mp_add_d (a, (mp_digit) y, a)) != MP_OKAY) {
return res;
if ((err = mp_mul_d(a, (mp_digit)radix, a)) != MP_OKAY) {
return err;
}
} else {
break;
}
++str;
}
/* if an illegal character was found, fail. */
if ((err = mp_add_d(a, (mp_digit)y, a)) != MP_OKAY) {
return err;
}
++str;
}
if ( *str != '\0' ) {
mp_zero( a );
/* if an illegal character was found, fail. */
if (!((*str == '\0') || (*str == '\r') || (*str == '\n'))) {
mp_zero(a);
return MP_VAL;
}
}
/* set the sign only if a != 0 */
if (mp_iszero(a) != 1) {
a->sign = neg;
}
return MP_OKAY;
/* set the sign only if a != 0 */
if (!MP_IS_ZERO(a)) {
a->sign = neg;
}
return MP_OKAY;
}
#endif