add deprecated (removed from posix) [efg]cvt() functions

[musl] / src / stdlib / fcvt.c

diff --git a/src/stdlib/fcvt.c b/src/stdlib/fcvt.c
new file mode 100644 (file)
index 0000000..003aa5a
--- /dev/null
+++ b/src/stdlib/fcvt.c
@@ -0,0 +1,25 @@
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+char *fcvt(double x, int n, int *dp, int *sign)
+{
+       char tmp[1500];
+       int i, lz;
+
+       if (n > 1400U) n = 1400;
+       sprintf(tmp, "%.*f", n, x);
+       i = (tmp[0] == '-');
+       if (tmp[i] == '0') lz = strspn(tmp+i+2, "0");
+       else lz = -(int)strcspn(tmp+i, ".");
+
+       if (n<=lz) {
+               *sign = i;
+               *dp = 0;
+               if (n>14U) n = 14;
+               return "000000000000000"+14-n;
+       }
+
+       return ecvt(x, n-lz, dp, sign);
+}