Add sals, several refactors

Signed-off-by: Laurent Bercot <ska@appnovation.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/src/libstddjb/sals.c b/src/libstddjb/sals.c
new file mode 100644
index 0000000..839df6d
--- /dev/null
+++ b/src/libstddjb/sals.c
@@ -0,0 +1,44 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <string.h>
+
+#include <skalibs/direntry.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+
+int sals (char const *fn, stralloc *sa, size_t *x)
+{
+  int n = 0 ;
+  size_t sabase = sa->len ;
+  size_t maxlen = 0 ;
+  DIR *dir = opendir(fn) ;
+  if (dir)
+  {
+    for (;;)
+    {
+      direntry *d ;
+      size_t len ;
+      errno = 0 ;
+      d = readdir(dir) ;
+      if (!d) break ;
+      if (d->d_name[0] == '.')
+        if (((d->d_name[1] == '.') && !d->d_name[2]) || !d->d_name[1])
+          continue ;
+      len = strlen(d->d_name) ;
+      if (len > maxlen) maxlen = len ;
+      if (!stralloc_catb(sa, d->d_name, len+1)) goto err ;
+      n++ ;
+    }
+    if (errno) goto err ;
+    dir_close(dir) ;
+  }
+  else if (errno != ENOENT) return -1 ;
+  if (x) *x = maxlen ;
+  return n ;
+
+ err:
+  dir_close(dir) ;
+  sa->len = sabase ;
+  return -1 ;
+}