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//------------------------------------------------------------------------------
// GB_mx_mxArray_to_string.c: get a built-in string
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_mex.h"
int GB_mx_mxArray_to_string // returns length of string, or -1 if S not a string
(
char *string, // size maxlen
const size_t maxlen, // length of string
const mxArray *S // built-in mxArray containing a string
)
{
size_t len = 0 ;
string [0] = '\0' ;
if (S != NULL && mxGetNumberOfElements (S) > 0)
{
if (!mxIsChar (S))
{
mexWarnMsgIdAndTxt ("GB:warn", "argument must be a string") ;
return (-1) ;
}
len = mxGetNumberOfElements (S) ;
if (len > 0)
{
mxGetString (S, string, maxlen) ;
string [maxlen] = '\0' ;
}
}
return (len) ;
}
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