forked from github/server
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
|
|
Copyright (c) 1998-2015, Enno Rehling <enno@eressea.de>
|
|
Katja Zedel <katze@felidae.kn-bremen.de
|
|
Christian Schlittchen <corwin@amber.kn-bremen.de>
|
|
|
|
Permission to use, copy, modify, and/or distribute this software for any
|
|
purpose with or without fee is hereby granted, provided that the above
|
|
copyright notice and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
**/
|
|
|
|
#include <platform.h>
|
|
#include "base36.h"
|
|
#include "log.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <assert.h>
|
|
#include <ctype.h>
|
|
|
|
int atoi36(const char *str)
|
|
{
|
|
/* cannot use strtol, because invalid strings will cause crash */
|
|
const unsigned char *s = (const unsigned char *)str;
|
|
int i = 0, sign = 1;
|
|
assert(s);
|
|
if (!(*s))
|
|
return 0;
|
|
if (*s == '-') {
|
|
sign = -1;
|
|
++s;
|
|
}
|
|
while (isalnum(*(unsigned char *)s)) {
|
|
if (isupper(*(unsigned char *)s))
|
|
i = i * 36 + (*s) - 'A' + 10;
|
|
else if (islower(*(unsigned char *)s))
|
|
i = i * 36 + (*s) - 'a' + 10;
|
|
else if (isdigit(*(unsigned char *)s))
|
|
i = i * 36 + (*s) - '0';
|
|
else
|
|
break;
|
|
++s;
|
|
}
|
|
if (i < 0)
|
|
return 0;
|
|
return i * sign;
|
|
}
|
|
|
|
const char *itoab(int i, int base)
|
|
{
|
|
static char sstr[80];
|
|
char *s, *dst;
|
|
static int index = 0; /* STATIC_XCALL: used across calls */
|
|
int neg = 0;
|
|
|
|
s = sstr + (index * 20);
|
|
index = (index + 1) & 3; /* quick for % 4 */
|
|
dst = s + 19;
|
|
(*dst--) = 0;
|
|
if (i != 0) {
|
|
if (i < 0) {
|
|
i = -i;
|
|
neg = 1;
|
|
}
|
|
while (i && dst >= s) {
|
|
int x = i % base;
|
|
i = i / base;
|
|
if (x < 10) {
|
|
*(dst--) = (char)('0' + x);
|
|
}
|
|
else if ('a' + x - 10 == 'l') {
|
|
*(dst--) = 'L';
|
|
}
|
|
else {
|
|
*(dst--) = (char)('a' + (x - 10));
|
|
}
|
|
}
|
|
if (dst > s) {
|
|
if (neg) {
|
|
*(dst) = '-';
|
|
}
|
|
else {
|
|
++dst;
|
|
}
|
|
}
|
|
else {
|
|
log_error("static buffer exhauset, itoab(%d, %d)", i, base);
|
|
assert(i == 0 || !"itoab: static buffer exhausted");
|
|
}
|
|
}
|
|
else
|
|
*dst = '0';
|
|
|
|
return dst;
|
|
}
|
|
|
|
const char *itoa36(int i)
|
|
{
|
|
return itoab(i, 36);
|
|
}
|
|
|
|
const char *itoa10(int i)
|
|
{
|
|
return itoab(i, 10);
|
|
}
|
|
|
|
int i10toi36(int i)
|
|
{
|
|
int r = 0;
|
|
while (i) {
|
|
r = r * 36 + i % 10;
|
|
i = i / 10;
|
|
}
|
|
return r;
|
|
}
|