libguile/readline.c

   1 /* need copyright assignment from Daniel Risacher */
   2
   3 #include "_scm.h"
   4 #ifdef HAVE_LIBREADLINE
   5 #include <libguile.h>
   6 #include <gh.h>
   7 #include <readline/readline.h>
   8 #include <readline/history.h>
   9
  10 SCM_PROC (s_readline, "readline", 0, 1, 0, scm_readline);
  11 SCM
  12 scm_readline (SCM txt)
  13 {
  14   SCM ret;
  15   char* s;
  16   char* prompt;
  17
  18   if (! SCM_UNBNDP (txt))
  19     {
  20       SCM_ASSERT ((SCM_NIMP(txt) && SCM_STRINGP(txt)), txt, SCM_ARG1,
  21                   s_readline);
  22       SCM_COERCE_SUBSTR (txt);
  23     }
  24
  25   SCM_DEFER_INTS;
  26   prompt = SCM_UNBNDP (txt) ? "" : SCM_CHARS (txt);
  27
  28   s = readline(prompt);
  29   if (s)
  30     ret = gh_str02scm(s);
  31   else
  32     ret = SCM_EOF_VAL;
  33
  34   free (s);
  35   SCM_ALLOW_INTS;
  36
  37   return ret;
  38 }
  39
  40 SCM_PROC (s_add_history, "add-history", 1, 0, 0, scm_add_history);
  41 SCM
  42 scm_add_history (SCM txt)
  43 {
  44   char* s;
  45   SCM_ASSERT ((SCM_NIMP(txt) && SCM_STRINGP(txt)), txt, SCM_ARG1,
  46               s_add_history);
  47   SCM_COERCE_SUBSTR (txt);
  48
  49   SCM_DEFER_INTS;
  50   s = SCM_CHARS(txt);
  51   add_history(s);
  52   SCM_ALLOW_INTS;
  53
  54   return SCM_UNSPECIFIED;
  55 }
  56
  57 void
  58 scm_init_readline ()
  59 {
  60 #include "readline.x"
  61   scm_add_feature ("readline");
  62 }
  63
  64 #endif