annotate bn_mp_fwrite.c @ 1:22d5cf7d4b1a libtommath

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author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:23:46 +0000
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1 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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2 *
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3 * LibTomMath is a library that provides multiple-precision
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4 * integer arithmetic as well as number theoretic functionality.
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5 *
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6 * The library was designed directly after the MPI library by
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7 * Michael Fromberger but has been written from scratch with
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8 * additional optimizations in place.
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9 *
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10 * The library is free for all purposes without any express
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11 * guarantee it works.
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12 *
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13 * Tom St Denis, [email protected], http://math.libtomcrypt.org
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14 */
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15 #include <tommath.h>
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16
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17 int mp_fwrite(mp_int *a, int radix, FILE *stream)
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18 {
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19 char *buf;
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20 int err, len, x;
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21
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22 if ((err = mp_radix_size(a, radix, &len)) != MP_OKAY) {
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23 return err;
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24 }
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26 buf = OPT_CAST(char) XMALLOC (len);
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27 if (buf == NULL) {
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28 return MP_MEM;
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29 }
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31 if ((err = mp_toradix(a, buf, radix)) != MP_OKAY) {
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32 XFREE (buf);
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33 return err;
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34 }
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35
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36 for (x = 0; x < len; x++) {
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37 if (fputc(buf[x], stream) == EOF) {
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38 XFREE (buf);
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39 return MP_VAL;
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40 }
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41 }
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42
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43 XFREE (buf);
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44 return MP_OKAY;
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45 }
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