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authorRich Felker <dalias@aerifal.cx>2012-02-06 01:14:23 -0500
committerRich Felker <dalias@aerifal.cx>2012-02-06 01:14:23 -0500
commitf4ad36c4bf23899a3164ebd40ff5781c152bcb01 (patch)
treeb1d9a18eac66966fe7718d6cf82b4da83f99b1a0 /src/stdlib/ecvt.c
parent5a09a53010046fce204cb5138329f8aace79ab1a (diff)
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add deprecated (removed from posix) [efg]cvt() functions
these have not been heavily tested, but they should work as described
in the old standards. probably broken for non-finite values...
Diffstat (limited to 'src/stdlib/ecvt.c')
-rw-r--r--src/stdlib/ecvt.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/src/stdlib/ecvt.c b/src/stdlib/ecvt.c
new file mode 100644
index 00000000..48e70cd8
--- /dev/null
+++ b/src/stdlib/ecvt.c
@@ -0,0 +1,19 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+char *ecvt(double x, int n, int *dp, int *sign)
+{
+	static char buf[16];
+	char tmp[32];
+	int i, j;
+
+	if (n-1U > 15) n = 15;
+	sprintf(tmp, "%.*e", n-1, x);
+	i = *sign = (tmp[0]=='-');
+	for (j=0; tmp[i]!='e'; j+=(tmp[i++]!='.'))
+		buf[j] = tmp[i];
+	buf[j] = 0;
+	*dp = atoi(tmp+i+1);
+
+	return buf;
+}