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...

diff --git a/include/stdlib.h b/include/stdlib.h
index 43225dd..9c8a118 100644 (file)
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -134,6 +134,9 @@ void *valloc (size_t);
 void *memalign(size_t, size_t);
 int clearenv(void);
 int ptsname_r(int, char *, size_t);
 void *memalign(size_t, size_t);
 int clearenv(void);
 int ptsname_r(int, char *, size_t);

+char *ecvt(double, int, int *, int *);
+char *fcvt(double, int, int *, int *);
+char *gcvt(double, int, char *);

 #endif
 
 
 #endif
 
 

diff --git a/src/stdlib/ecvt.c b/src/stdlib/ecvt.c
new file mode 100644 (file)
index 0000000..48e70cd
--- /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;
+}

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);
+}

diff --git a/src/stdlib/gcvt.c b/src/stdlib/gcvt.c
new file mode 100644 (file)
index 0000000..6c075e2
--- /dev/null
+++ b/src/stdlib/gcvt.c
@@ -0,0 +1,8 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+char *gcvt(double x, int n, char *b)
+{
+       sprintf(b, "%.*g", n, x);
+       return b;
+}