1 files changed, 76 insertions, 0 deletions
diff --git a/src/libexecline/exlsn_import.c b/src/libexecline/exlsn_import.c
new file mode 100644
index 0000000..1574027
--- /dev/null
+++ b/src/libexecline/exlsn_import.c
@@ -0,0 +1,76 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/genalloc.h>
+#include <skalibs/env.h>
+#include <execline/execline.h>
+#include "exlsn.h"
+
+static int exlsn_import_as (int argc, char const **argv, char const *const *envp, exlsn_t *info, unsigned int as)
+{
+  eltransforminfo_t si = ELTRANSFORMINFO_ZERO ;
+  subgetopt_t localopt = SUBGETOPT_ZERO ;
+  elsubst_t blah ;
+  char const *defaultval = 0 ;
+  char const *x ;
+  int insist = 0 ;
+  blah.var = info->vars.len ;
+  blah.value = info->values.len ;
+
+  for (;;)
+  {
+    register int opt = subgetopt_r(argc, argv, "iD:nsCcd:", &localopt) ;
+    if (opt < 0) break ;
+    switch (opt)
+    {
+      case 'i' : insist = 1 ; break ;
+      case 'D' : defaultval = localopt.arg ; break ;
+      case 'n' : si.chomp = 1 ; break ;
+      case 's' : si.split = 1 ; break ;
+      case 'C' : si.crunch = 1 ; break ;
+      case 'c' : si.crunch = 0 ; break ;
+      case 'd' : si.delim = localopt.arg ; break ;
+      default : return -3 ;
+    }
+  }
+  argc -= localopt.ind ; argv += localopt.ind ;
+
+  if ((unsigned int)argc < 1+as) return -3 ;
+  if (!*argv[0] || el_vardupl(argv[0], info->vars.s, info->vars.len)) return -2 ;
+  if (!stralloc_catb(&info->vars, argv[0], str_len(argv[0]) + 1)) return -1 ;
+  x = env_get2(envp, argv[as]) ;
+  if (!x)
+  {
+    if (insist) strerr_dienotset(100, argv[as]) ;
+    x = defaultval ;
+  }
+  if (!x) blah.n = 0 ;
+  else
+  {
+    register int r ;
+    if (!stralloc_cats(&info->values, x)) goto err ;
+    r = el_transform(&info->values, blah.value, &si) ;
+    if (r < 0) goto err ;
+    blah.n = r ;
+  }
+  if (!genalloc_append(elsubst_t, &info->data, &blah)) goto err ;
+  return localopt.ind + 1 + as ;
+
+ err:
+  info->vars.len = blah.var ;
+  info->values.len = blah.value ;
+  return -1 ;
+}
+
+int exlsn_import (int argc, char const **argv, char const *const *envp, exlsn_t *info)
+{
+  return exlsn_import_as(argc, argv, envp, info, 0) ;
+}
+
+int exlsn_importas (int argc, char const **argv, char const *const *envp, exlsn_t *info)
+{
+  return exlsn_import_as(argc, argv, envp, info, 1) ;
+}