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//------------------------------------------------------------------------------
// GB_assign_describe: construct a string that describes GrB_assign / subassign
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB.h"
void GB_assign_describe
(
// output
char *str, // string of size slen
int slen,
// input
const bool C_replace, // descriptor for C
const int Ikind,
const int Jkind,
const bool M_is_null,
const int M_sparsity,
const bool Mask_comp, // true for !M, false for M
const bool Mask_struct, // true if M is structural, false if valued
const GrB_BinaryOp accum, // present here
const bool A_is_null,
const int assign_kind // row assign, col assign, assign, or subassign
)
{
//--------------------------------------------------------------------------
// construct the accum operator string
//--------------------------------------------------------------------------
str [0] = '\0' ;
char *op_str ;
if (accum == NULL)
{
// no accum operator is present
op_str = "" ;
}
else
{
// use a simpler version of accum->name
if (accum->opcode == GB_USER_binop_code) op_str = "op" ;
else if (GB_STRING_MATCH (accum->name, "plus")) op_str = "+" ;
else if (GB_STRING_MATCH (accum->name, "minus")) op_str = "-" ;
else if (GB_STRING_MATCH (accum->name, "times")) op_str = "*" ;
else if (GB_STRING_MATCH (accum->name, "div")) op_str = "/" ;
else if (GB_STRING_MATCH (accum->name, "or")) op_str = "|" ;
else if (GB_STRING_MATCH (accum->name, "and")) op_str = "&" ;
else if (GB_STRING_MATCH (accum->name, "xor")) op_str = "^" ;
else op_str = accum->name ;
}
//--------------------------------------------------------------------------
// construct the Mask string
//--------------------------------------------------------------------------
#define GB_MASK_STRING_LEN 128
const char *Mask ;
char Mask_string [GB_MASK_STRING_LEN+1] ;
if (M_is_null)
{
// M is not present
if (Mask_comp)
{
Mask = C_replace ? "<!,replace>" : "<!>" ;
}
else
{
Mask = C_replace ? "<replace>" : "" ;
}
}
else
{
// M is present
snprintf (Mask_string, GB_MASK_STRING_LEN, "<%sM%s%s%s>",
(Mask_comp) ? "!" : "",
(M_sparsity == GxB_BITMAP) ? ",bitmap"
: ((M_sparsity == GxB_FULL) ? ",full" : ""),
Mask_struct ? ",struct" : "",
C_replace ? ",replace" : "") ;
Mask = Mask_string ;
}
//--------------------------------------------------------------------------
// construct the string for A or the scalar
//--------------------------------------------------------------------------
const char *S = (A_is_null) ? "scalar" : "A" ;
//--------------------------------------------------------------------------
// construct the string for (I,J)
//--------------------------------------------------------------------------
const char *Istr = (Ikind == GB_ALL) ? ":" : "I" ;
const char *Jstr = (Jkind == GB_ALL) ? ":" : "J" ;
//--------------------------------------------------------------------------
// burble the final result
//--------------------------------------------------------------------------
switch (assign_kind)
{
case GB_ROW_ASSIGN :
// C(i,J) = A
snprintf (str, slen, "C%s(i,%s) %s= A ", Mask, Jstr, op_str) ;
break ;
case GB_COL_ASSIGN :
// C(I,j) = A
snprintf (str, slen, "C%s(%s,j) %s= A ", Mask, Istr, op_str) ;
break ;
case GB_ASSIGN :
// C<M>(I,J) = A
if (Ikind == GB_ALL && Jkind == GB_ALL)
{
// C<M> += A
snprintf (str, slen, "C%s %s= %s ", Mask, op_str, S) ;
}
else
{
// C<M>(I,J) = A
snprintf (str, slen, "C%s(%s,%s) %s= %s ", Mask, Istr, Jstr,
op_str, S) ;
}
break ;
case GB_SUBASSIGN :
// C(I,J)<M> = A
if (Ikind == GB_ALL && Jkind == GB_ALL)
{
// C<M> += A
snprintf (str, slen, "C%s %s= %s ", Mask, op_str, S) ;
}
else
{
// C(I,J)<M> = A
snprintf (str, slen, "C(%s,%s)%s %s= %s ", Istr, Jstr, Mask,
op_str, S) ;
}
break ;
default: ;
}
}
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