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simplesshd/dropbear/libtommath/bn_mp_fwrite.c
2020-12-28 16:40:37 -05:00

46 lines
992 B
C

#include "tommath_private.h"
#ifdef BN_MP_FWRITE_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
#ifndef MP_NO_FILE
mp_err mp_fwrite(const mp_int *a, int radix, FILE *stream)
{
char *buf;
mp_err err;
int len;
size_t written;
/* TODO: this function is not in this PR */
if (MP_HAS(MP_RADIX_SIZE_OVERESTIMATE)) {
/* if ((err = mp_radix_size_overestimate(&t, base, &len)) != MP_OKAY) goto LBL_ERR; */
} else {
if ((err = mp_radix_size(a, radix, &len)) != MP_OKAY) {
return err;
}
}
buf = (char *) MP_MALLOC((size_t)len);
if (buf == NULL) {
return MP_MEM;
}
if ((err = mp_to_radix(a, buf, (size_t)len, &written, radix)) != MP_OKAY) {
goto LBL_ERR;
}
if (fwrite(buf, written, 1uL, stream) != 1uL) {
err = MP_ERR;
goto LBL_ERR;
}
err = MP_OKAY;
LBL_ERR:
MP_FREE_BUFFER(buf, (size_t)len);
return err;
}
#endif
#endif