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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "libuutil_common.h"
#include <limits.h>
#include <ctype.h>
#define MAX_BASE 36
#define IS_DIGIT(x) ((x) >= '0' && (x) <= '9')
#define CTOI(x) (((x) >= '0' && (x) <= '9') ? (x) - '0' : \
((x) >= 'a' && (x) <= 'z') ? (x) + 10 - 'a' : (x) + 10 - 'A')
static int
strtoint(const char *s_arg, uint64_t *out, uint32_t base, int sign)
{
const unsigned char *s = (const unsigned char *)s_arg;
uint64_t val = 0;
uint64_t multmax;
unsigned c, i;
int neg = 0;
int bad_digit = 0;
int bad_char = 0;
int overflow = 0;
if (s == NULL || base == 1 || base > MAX_BASE) {
uu_set_error(UU_ERROR_INVALID_ARGUMENT);
return (-1);
}
while ((c = *s) != 0 && isspace(c))
s++;
switch (c) {
case '-':
if (!sign)
overflow = 1; /* becomes underflow below */
neg = 1;
/*FALLTHRU*/
case '+':
c = *++s;
break;
default:
break;
}
if (c == '\0') {
uu_set_error(UU_ERROR_EMPTY);
return (-1);
}
if (base == 0) {
if (c != '0')
base = 10;
else if (s[1] == 'x' || s[1] == 'X')
base = 16;
else
base = 8;
}
if (base == 16 && c == '0' && (s[1] == 'x' || s[1] == 'X'))
c = *(s += 2);
if ((val = CTOI(c)) >= base) {
if (IS_DIGIT(c))
bad_digit = 1;
else
bad_char = 1;
val = 0;
}
multmax = (uint64_t)UINT64_MAX / (uint64_t)base;
for (c = *++s; c != '\0'; c = *++s) {
if ((i = CTOI(c)) >= base) {
if (isspace(c))
break;
if (IS_DIGIT(c))
bad_digit = 1;
else
bad_char = 1;
i = 0;
}
if (val > multmax)
overflow = 1;
val *= base;
if ((uint64_t)UINT64_MAX - val < (uint64_t)i)
overflow = 1;
val += i;
}
while ((c = *s) != 0) {
if (!isspace(c))
bad_char = 1;
s++;
}
if (sign) {
if (neg) {
if (val > -(uint64_t)INT64_MIN)
overflow = 1;
} else {
if (val > INT64_MAX)
overflow = 1;
}
}
if (neg)
val = -val;
if (bad_char | bad_digit | overflow) {
if (bad_char)
uu_set_error(UU_ERROR_INVALID_CHAR);
else if (bad_digit)
uu_set_error(UU_ERROR_INVALID_DIGIT);
else if (overflow) {
if (neg)
uu_set_error(UU_ERROR_UNDERFLOW);
else
uu_set_error(UU_ERROR_OVERFLOW);
}
return (-1);
}
*out = val;
return (0);
}
int
uu_strtoint(const char *s, void *v, size_t sz, int base,
int64_t min, int64_t max)
{
uint64_t val_u;
int64_t val;
if (min > max)
goto bad_argument;
switch (sz) {
case 1:
if (max > INT8_MAX || min < INT8_MIN)
goto bad_argument;
break;
case 2:
if (max > INT16_MAX || min < INT16_MIN)
goto bad_argument;
break;
case 4:
if (max > INT32_MAX || min < INT32_MIN)
goto bad_argument;
break;
case 8:
if (max > INT64_MAX || min < INT64_MIN)
goto bad_argument;
break;
default:
goto bad_argument;
}
if (min == 0 && max == 0) {
min = -(1ULL << (8 * sz - 1));
max = (1ULL << (8 * sz - 1)) - 1;
}
if (strtoint(s, &val_u, base, 1) == -1)
return (-1);
val = (int64_t)val_u;
if (val < min) {
uu_set_error(UU_ERROR_UNDERFLOW);
return (-1);
} else if (val > max) {
uu_set_error(UU_ERROR_OVERFLOW);
return (-1);
}
switch (sz) {
case 1:
*(int8_t *)v = val;
return (0);
case 2:
*(int16_t *)v = val;
return (0);
case 4:
*(int32_t *)v = val;
return (0);
case 8:
*(int64_t *)v = val;
return (0);
default:
break; /* fall through to bad_argument */
}
bad_argument:
uu_set_error(UU_ERROR_INVALID_ARGUMENT);
return (-1);
}
int
uu_strtouint(const char *s, void *v, size_t sz, int base,
uint64_t min, uint64_t max)
{
uint64_t val;
if (min > max)
goto bad_argument;
switch (sz) {
case 1:
if (max > UINT8_MAX)
goto bad_argument;
break;
case 2:
if (max > UINT16_MAX)
goto bad_argument;
break;
case 4:
if (max > UINT32_MAX)
goto bad_argument;
break;
case 8:
if (max > UINT64_MAX)
goto bad_argument;
break;
default:
goto bad_argument;
}
if (min == 0 && max == 0) {
/* we have to be careful, since << can overflow */
max = (1ULL << (8 * sz - 1)) * 2 - 1;
}
if (strtoint(s, &val, base, 0) == -1)
return (-1);
if (val < min) {
uu_set_error(UU_ERROR_UNDERFLOW);
return (-1);
} else if (val > max) {
uu_set_error(UU_ERROR_OVERFLOW);
return (-1);
}
switch (sz) {
case 1:
*(uint8_t *)v = val;
return (0);
case 2:
*(uint16_t *)v = val;
return (0);
case 4:
*(uint32_t *)v = val;
return (0);
case 8:
*(uint64_t *)v = val;
return (0);
default:
break; /* shouldn't happen, fall through */
}
bad_argument:
uu_set_error(UU_ERROR_INVALID_ARGUMENT);
return (-1);
}
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