Initial revision

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@2 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 81 insertions, 0 deletions

diff --git a/x68/fconvert.c b/x68/fconvert.c
new file mode 100644
index 000000000..9a0bc0e08
--- /dev/null
+++ b/x68/fconvert.c
@@ -0,0 +1,81 @@
+/*
+ * PROJECT C Library, X68000 PROGRAMMING INTERFACE DEFINITION
+ * --------------------------------------------------------------------
+ * This file is written by the Project C Library Group,  and completely
+ * in public domain. You can freely use, copy, modify, and redistribute
+ * the whole contents, without this notice.
+ * --------------------------------------------------------------------
+ * $Id$
+ */
+/* changed 1997.2.3 by K.Okabe */
+
+/* System headers */
+#include <stdlib.h>
+#include <sys/xstdlib.h>
+
+/* Functions */
+char *fconvert (double x, int ndigit, int *decpt, int *sign, char *buffer)
+{
+    int pos, n;
+    char *src, *dst;
+    char string[24];
+    int figup;
+
+    /* 18桁の文字列に変換 */
+    _dtos18 (x, decpt, sign, string);
+
+    /* コピー元アドレスを設定 */
+    src = string;
+
+    /* コピー先アドレスを設定 */
+    dst = buffer;
+
+    /* 小数点位置を得る */
+    pos = *decpt;
+
+    /* 小数点位置が負なら */
+    if (pos < 0) {
+
+	/* 埋める桁数を計算 */
+	n = min (-pos, ndigit);
+
+	/* 先頭を0で埋める */
+	while (n-- > 0)
+	    *dst++ = '0';
+
+	/* 小数点位置は0になる */
+	*decpt = 0;
+
+    }
+
+    /* 残りのコピー桁数 */
+    n = ndigit + pos;
+
+    /* 格納先にコピー */
+    while (n-- > 0) {
+
+	/* 足りない部分は0で埋める */
+	if (*src == '\0') {
+	    while (n-- >= 0)
+		*dst++ = '0';
+	    break;
+	}
+
+	/* 変換文字列からコピー */
+	*dst++ = *src++;
+
+    }
+
+    /* 丸める */
+    *decpt += (figup = _round (buffer, dst, *src));
+
+    /* 繰り上がりがあれば末尾に0を追加する */
+    if (figup)
+	*dst++ = '0';
+
+    /* 終端に NUL を打つ */
+    *dst = '\0';
+
+    /* アドレスを返す */
+    return buffer;
+}