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/*
* Unix SMB/CIFS implementation.
*
* Copyright (C) Swen Schillig 2019
*
* ** NOTE! The following LGPL license applies to this file.
* ** This does NOT imply that all of Samba is released
* ** under the LGPL
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "smb_strtox.h"
/**
* Convert a string to an unsigned long integer
*
* @param nptr pointer to string which is to be converted
* @param endptr [optional] reference to remainder of the string
* @param base base of the numbering scheme
* @param err error occurred during conversion
* @flags controlling conversion feature
* @result result of the conversion as provided by strtoul
*
* The following flags are supported
* SMB_STR_STANDARD # raise error if negative or non-numeric
* SMB_STR_ALLOW_NEGATIVE # allow strings with a leading "-"
* SMB_STR_FULL_STR_CONV # entire string must be converted
* SMB_STR_ALLOW_NO_CONVERSION # allow empty strings or non-numeric
* SMB_STR_GLIBC_STANDARD # act exactly as the standard glibc strtoul
*
* The following errors are detected
* - wrong base
* - value overflow
* - string with a leading "-" indicating a negative number
* - no conversion due to empty string or not representing a number
*/
unsigned long int
smb_strtoul(const char *nptr, char **endptr, int base, int *err, int flags)
{
unsigned long int val;
int saved_errno = errno;
char *needle = NULL;
char *tmp_endptr = NULL;
errno = 0;
*err = 0;
val = strtoul(nptr, &tmp_endptr, base);
if (endptr != NULL) {
*endptr = tmp_endptr;
}
if (errno != 0) {
*err = errno;
errno = saved_errno;
return val;
}
if ((flags & SMB_STR_ALLOW_NO_CONVERSION) == 0) {
/* got an invalid number-string resulting in no conversion */
if (nptr == tmp_endptr) {
*err = EINVAL;
goto out;
}
}
if ((flags & SMB_STR_ALLOW_NEGATIVE ) == 0) {
/* did we convert a negative "number" ? */
needle = strchr(nptr, '-');
if (needle != NULL && needle < tmp_endptr) {
*err = EINVAL;
goto out;
}
}
if ((flags & SMB_STR_FULL_STR_CONV) != 0) {
/* did we convert the entire string ? */
if (tmp_endptr[0] != '\0') {
*err = EINVAL;
goto out;
}
}
out:
errno = saved_errno;
return val;
}
/**
* Convert a string to an unsigned long long integer
*
* @param nptr pointer to string which is to be converted
* @param endptr [optional] reference to remainder of the string
* @param base base of the numbering scheme
* @param err error occurred during conversion
* @flags controlling conversion feature
* @result result of the conversion as provided by strtoull
*
* The following flags are supported
* SMB_STR_STANDARD # raise error if negative or non-numeric
* SMB_STR_ALLOW_NEGATIVE # allow strings with a leading "-"
* SMB_STR_FULL_STR_CONV # entire string must be converted
* SMB_STR_ALLOW_NO_CONVERSION # allow empty strings or non-numeric
* SMB_STR_GLIBC_STANDARD # act exactly as the standard glibc strtoul
*
* The following errors are detected
* - wrong base
* - value overflow
* - string with a leading "-" indicating a negative number
* - no conversion due to empty string or not representing a number
*/
unsigned long long int
smb_strtoull(const char *nptr, char **endptr, int base, int *err, int flags)
{
unsigned long long int val;
int saved_errno = errno;
char *needle = NULL;
char *tmp_endptr = NULL;
errno = 0;
*err = 0;
val = strtoull(nptr, &tmp_endptr, base);
if (endptr != NULL) {
*endptr = tmp_endptr;
}
if (errno != 0) {
*err = errno;
errno = saved_errno;
return val;
}
if ((flags & SMB_STR_ALLOW_NO_CONVERSION) == 0) {
/* got an invalid number-string resulting in no conversion */
if (nptr == tmp_endptr) {
*err = EINVAL;
goto out;
}
}
if ((flags & SMB_STR_ALLOW_NEGATIVE ) == 0) {
/* did we convert a negative "number" ? */
needle = strchr(nptr, '-');
if (needle != NULL && needle < tmp_endptr) {
*err = EINVAL;
goto out;
}
}
if ((flags & SMB_STR_FULL_STR_CONV) != 0) {
/* did we convert the entire string ? */
if (tmp_endptr[0] != '\0') {
*err = EINVAL;
goto out;
}
}
out:
errno = saved_errno;
return val;
}
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