From: Sven Verdoolaege <skimo@kotnet.org>
Date: Thu, 26 Feb 2009 10:59:03 +0000 (+0100)
Subject: add isl_mat_swap_cols
X-Git-Tag: isl-0.01~270
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=19556df351532e510c9e7cf5ab7d35254338dc1e;p=platform%2Fupstream%2Fisl.git

add isl_mat_swap_cols
---

diff --git a/isl_mat.c b/isl_mat.c
index 306f236..e2566d5 100644
--- a/isl_mat.c
+++ b/isl_mat.c
@@ -670,6 +670,25 @@ error:
 	return NULL;
 }
 
+struct isl_mat *isl_mat_swap_cols(struct isl_ctx *ctx,
+	struct isl_mat *mat, unsigned i, unsigned j)
+{
+	int r;
+
+	mat = isl_mat_cow(ctx, mat);
+	if (!mat)
+		return NULL;
+	isl_assert(ctx, i < mat->n_col, goto error);
+	isl_assert(ctx, j < mat->n_col, goto error);
+
+	for (r = 0; r < mat->n_row; ++r)
+		isl_int_swap(mat->row[r][i], mat->row[r][j]);
+	return mat;
+error:
+	isl_mat_free(ctx, mat);
+	return NULL;
+}
+
 struct isl_mat *isl_mat_swap_rows(struct isl_ctx *ctx,
 	struct isl_mat *mat, unsigned i, unsigned j)
 {
diff --git a/isl_mat.h b/isl_mat.h
index 503b6f4..ea38739 100644
--- a/isl_mat.h
+++ b/isl_mat.h
@@ -41,6 +41,8 @@ void isl_mat_sub_copy(struct isl_ctx *ctx, isl_int **dst, isl_int **src,
 void isl_mat_sub_neg(struct isl_ctx *ctx, isl_int **dst, isl_int **src,
 	unsigned n_row, unsigned dst_col, unsigned src_col, unsigned n_col);
 
+struct isl_mat *isl_mat_swap_cols(struct isl_ctx *ctx,
+	struct isl_mat *mat, unsigned i, unsigned j);
 struct isl_mat *isl_mat_swap_rows(struct isl_ctx *ctx,
 	struct isl_mat *mat, unsigned i, unsigned j);