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/* be-flipping-v3.c -- Test for handling different endianness for SFrame V3
flex FDE in libsframe.
Copyright (C) 2026 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "sframe-test.h"
/* SFrame info from the source specified in README-be-flipping-v3. It contains
one flex FDE with 5 FREs. */
#define DATA "DATA-BE-V3"
int
main (void)
{
sframe_decoder_ctx *dctx = NULL;
uint32_t nfres, fsize;
int32_t fstart;
unsigned char finfo;
int err = 0, err_reg_data = 0;
uint32_t reg_data = 0;
FILE *fp;
struct stat st;
char *sf_buf;
size_t sf_size;
uint8_t rep_block_size;
/* Test setup. */
fp = fopen (DATA, "r");
if (fp == NULL)
goto setup_fail;
if (fstat (fileno (fp), &st) < 0)
{
perror ("fstat");
fclose (fp);
goto setup_fail;
}
sf_buf = malloc (st.st_size);
if (sf_buf == NULL)
{
perror ("malloc");
goto setup_fail;
}
sf_size = fread (sf_buf, 1, st.st_size, fp);
fclose (fp);
if (sf_size == 0)
{
fprintf (stderr, "Decode: Read buffer failed\n");
goto setup_fail;
}
uint32_t dfde = SFRAME_FDE_TYPE_FLEX;
/* Execute tests. */
/* Call to sframe_decode will endian flip the input buffer (big-endian) if
the host running the test is a little-endian system. This endian-flipped
copy of the buffer is kept internally in dctx. */
dctx = sframe_decode (sf_buf, sf_size, &err);
TEST (dctx != NULL, "be-flipping-v3: Decoder setup");
unsigned int fde_cnt = sframe_decoder_get_num_fidx (dctx);
TEST (fde_cnt == 1, "be-flipping-v3: Decoder FDE count");
err = sframe_decoder_get_funcdesc_v2 (dctx, 0, &nfres, &fsize, &fstart,
&finfo, &rep_block_size);
TEST (err == 0, "be-flipping-v3: Decoder get FDE");
TEST (nfres == 5, "be-flipping-v3: Decoder FRE count");
/* Get the FRE at index 2. */
sframe_frame_row_entry fre = {0};
err = sframe_decoder_get_fre (dctx, 0, 2, &fre);
TEST (err == 0, "be-flipping-v3: Decoder get third FRE");
/* Expected CFA offset of 160. */
TEST ((err == 0 && sframe_fre_get_cfa_offset (dctx, &fre, dfde, &err) == 0xa0),
"be-flipping-v3: Get CFA offset of third FRE");
/* Expected RA reg r16. */
reg_data = sframe_get_fre_udata (&fre, SFRAME_FRE_RA_OFFSET_IDX * 2,
&err_reg_data);
TEST ((err_reg_data == 0 && SFRAME_V3_FLEX_FDE_CTRLWORD_REG_P (reg_data) == 0x1),
"be-flipping-v3: Whether RA reg_p is true");
TEST ((err_reg_data == 0 && SFRAME_V3_FLEX_FDE_CTRLWORD_REGNUM (reg_data) == 16),
"be-flipping-v3: Get RA reg of third FRE");
/* Expected FP reg r17. */
err_reg_data = 0;
reg_data = sframe_get_fre_udata (&fre, SFRAME_FRE_FP_OFFSET_IDX * 2,
&err_reg_data);
TEST ((err_reg_data == 0 && SFRAME_V3_FLEX_FDE_CTRLWORD_REG_P (reg_data) == 0x1),
"be-flipping-v3: Whether FP reg_p is true");
TEST ((err_reg_data == 0 && SFRAME_V3_FLEX_FDE_CTRLWORD_REGNUM (reg_data) == 17),
"be-flipping-v3: Get FP reg of third FRE");
free (sf_buf);
sf_buf = NULL;
sframe_decoder_free (&dctx);
return 0;
setup_fail:
sframe_decoder_free (&dctx);
fail ("be-flipping-v3: Test setup");
return 1;
}
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