06201ff3d6
Implement not, shl and shr in mpz library. Add function to create mpzs on the stack, used for memory efficiency when rhs is a small int. Factor out code to parse base-prefix of number into a dedicated function.
41 lines
1015 B
C
41 lines
1015 B
C
#include "misc.h"
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#include "mpconfig.h"
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#include "parsenumbase.h"
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// find real radix base, and strip preceding '0x', '0o' and '0b'
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// puts base in *base, and returns number of bytes to skip the prefix
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int mp_parse_num_base(const char *str, uint len, int *base) {
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const char *p = str;
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int c = *(p++);
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if ((*base == 0 || *base == 16) && c == '0') {
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c = *(p++);
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if ((c | 32) == 'x') {
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*base = 16;
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} else if (*base == 0 && (c | 32) == 'o') {
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*base = 8;
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} else if (*base == 0 && (c | 32) == 'b') {
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*base = 2;
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} else {
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*base = 10;
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p -= 2;
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}
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} else if (*base == 8 && c == '0') {
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c = *(p++);
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if ((c | 32) != 'o') {
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p -= 2;
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}
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} else if (*base == 2 && c == '0') {
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c = *(p++);
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if ((c | 32) != 'b') {
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p -= 2;
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}
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} else {
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if (*base == 0) {
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*base = 10;
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}
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p--;
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}
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return p - str;
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}
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