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POLY: introduce delete_polynom_multi()

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Just a wrapper around delete_polynom() to handle multiple args.
Must be called with NULL as last argument!
This commit is contained in:
hasufell 2014-04-20 19:55:30 +02:00
parent 6594a022fe
commit 320af3c617
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GPG Key ID: 220CD1C5BDEED020
2 changed files with 29 additions and 5 deletions
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31
src/poly.c
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@ -24,6 +24,7 @@
#include "mem.h"
#include "poly.h"
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <tompoly.h>
@ -170,6 +171,30 @@ void delete_polynom(pb_poly *poly)
free(poly);
}
/**
* This deletes the internal structure of all polynomials,
* and frees the pointers. Don't call this on stack variables,
* this is intended for use after ntru_ functions, that
* return a polynomial pointer.
* You must call this with NULL as last argument!
*
* @param poly the polynomial to delete
* @param ... follow up polynomials
*/
void delete_polynom_multi(pb_poly *poly, ...)
{
pb_poly *next_poly;
va_list args;
next_poly = poly;
va_start(args, poly);
while (next_poly != NULL) {
delete_polynom(next_poly);
next_poly = va_arg(args, pb_poly*);
}
va_end(args);
}
/**
* Starmultiplication, as follows:
* c = a * b mod (x^N − 1)
@ -353,11 +378,7 @@ OUT_OF_LOOP:
mp_clear(&mp_tmp);
}
delete_polynom(a_tmp);
delete_polynom(b);
delete_polynom(c);
delete_polynom(f);
delete_polynom(g);
delete_polynom_multi(a_tmp, b, c, f, g, NULL);
/* TODO: check if the f * Fq = 1 (mod p) condition holds true */

3
src/poly.h
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@ -28,6 +28,7 @@
#include <tompoly.h>
#include <tommath.h>
#include <stdarg.h>
#include <stdbool.h>
#define MP_SET(...) mp_set(__VA_ARGS__)
@ -164,6 +165,8 @@ void erase_polynom(pb_poly *poly, size_t len);
void delete_polynom(pb_poly *new_poly);
void delete_polynom_multi(pb_poly *poly, ...);
void pb_starmultiply(pb_poly *a,
pb_poly *b,
pb_poly *c,