4 files changed, 79 insertions, 0 deletions
diff --git a/src/libstddjb/int64_scan_base_max.c b/src/libstddjb/int64_scan_base_max.c
new file mode 100644
index 0000000..69fb4bb
--- /dev/null
+++ b/src/libstddjb/int64_scan_base_max.c
@@ -0,0 +1,20 @@
+/* ISC license. */
+
+#include <skalibs/uint64.h>
+#include "fmtscan-internal.h"
+
+size_t int64_scan_base_max (char const *s, int64_t *d, uint8_t base, uint64_t max)
+{
+  if (s[0] == '-')
+  {
+    uint64_t u ;
+    size_t pos = uint64_scan_base_max(s+1, &u, base, max+1) ;
+    return pos ? (*d = -u, 1 + pos) : 0 ;
+  }
+  else if (s[0] == '+')
+  {
+    size_t pos = uint64_scan_base_max(s+1, (uint64_t *)d, base, max) ;
+    return pos ? 1 + pos : 0 ;
+  }
+  else return uint64_scan_base_max(s, (uint64_t *)d, base, max) ;
+}
diff --git a/src/libstddjb/uint640_fmt_generic.c b/src/libstddjb/uint640_fmt_generic.c
new file mode 100644
index 0000000..7ff02be
--- /dev/null
+++ b/src/libstddjb/uint640_fmt_generic.c
@@ -0,0 +1,21 @@
+/* ISC license. */
+
+#include <string.h>
+
+#include <skalibs/uint64.h>
+#include <skalibs/fmtscan.h>
+
+size_t uint640_fmt_generic (char *s, uint64_t x, size_t n, uint8_t base)
+{
+  size_t len = uint64_fmt_generic(0, x, base) ;
+  if (s)
+  {
+    if (len < n)
+    {
+      memset(s, '0', n - len) ;
+      s += n - len ;
+    }
+    uint64_fmt_generic(s, x, base) ;
+  }
+  return len > n ? len : n ;
+}
diff --git a/src/libstddjb/uint64_fmt_generic.c b/src/libstddjb/uint64_fmt_generic.c
new file mode 100644
index 0000000..54375a3
--- /dev/null
+++ b/src/libstddjb/uint64_fmt_generic.c
@@ -0,0 +1,17 @@
+/* ISC license. */
+
+#include <skalibs/uint64.h>
+#include <skalibs/fmtscan.h>
+
+size_t uint64_fmt_generic (char *s, uint64_t x, uint8_t base)
+{
+  size_t len = 1 ;
+  uint64_t q = x ;
+  while (q >= base) { len++ ; q /= base ; }
+  if (s)
+  {
+    s += len ;
+    do { *--s = fmtscan_asc(x % base) ; x /= base ; } while (x) ;
+  }
+  return len ;
+}
diff --git a/src/libstddjb/uint64_scan_base_max.c b/src/libstddjb/uint64_scan_base_max.c
new file mode 100644
index 0000000..6debe0a
--- /dev/null
+++ b/src/libstddjb/uint64_scan_base_max.c
@@ -0,0 +1,21 @@
+/* ISC license. */
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <skalibs/uint64.h>
+#include <skalibs/fmtscan.h>
+
+size_t uint64_scan_base_max (char const *s, uint64_t *u, uint8_t base, uint64_t max)
+{
+  uint64_t result = 0 ;
+  size_t pos = 0 ;
+  for (;; pos++)
+  {
+    uint8_t c = fmtscan_num(s[pos], base) ;
+    if (c >= base || result > ((max - c) / base)) break ;
+    result = result * base + c ;
+  }
+  if (pos) *u = result ;
+  return pos ;
+}