# terminfo.m4 serial 2 (gettext-0.17)
dnl Copyright (C) 2000-2002, 2006 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

dnl From Bruno Haible.

AC_DEFUN([gl_TERMINFO],
[
  AC_REQUIRE([gl_TERMINFO_BODY])
  if test $gl_cv_terminfo_tparam = no && test $gl_cv_terminfo_tparm = no; then
    AC_LIBOBJ([tparm])
  fi
  case "$gl_cv_terminfo" in
    no*)
      case "$gl_cv_termcap" in
        no*)
          AC_LIBOBJ([tputs])
          ;;
      esac
      ;;
  esac
])

AC_DEFUN([gl_TERMINFO_BODY],
[
  dnl Some systems have setupterm(), tigetnum(), tigetstr(), tigetflag(),
  dnl tputs(), tgoto() in the same library as tgetent(), tgetnum(), tgetstr(),
  dnl tgetflag(), e.g. Linux (in libncurses) or Solaris (in libtermcap =
  dnl libncurses).
  dnl Some systems have them in a different library, e.g. OSF/1 (in libcurses,
  dnl not in libtermcap) or HP-UX (in libxcurses, not in libtermcap).
  dnl Some systems, like NetBSD or BeOS, don't have these functions at all;
  dnl they have only a libtermcap.
  dnl Some systems, like BeOS, use GNU termcap, which has tparam() instead of
  dnl tparm().
  dnl Some systems, like mingw, have nothing at all.

  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
  AC_REQUIRE([AC_LIB_RPATH])

  dnl Search for libncurses and define LIBNCURSES, LTLIBNCURSES and INCNCURSES
  dnl accordingly.
  AC_LIB_LINKFLAGS_BODY([ncurses])

  dnl Search for libtermcap and define LIBTERMCAP, LTLIBTERMCAP and INCTERMCAP
  dnl accordingly.
  AC_LIB_LINKFLAGS_BODY([termcap])

  dnl Search for libxcurses and define LIBXCURSES, LTLIBXCURSES and INCXCURSES
  dnl accordingly.
  AC_LIB_LINKFLAGS_BODY([xcurses])

  dnl Search for libcurses and define LIBCURSES, LTLIBCURSES and INCCURSES
  dnl accordingly.
  AC_LIB_LINKFLAGS_BODY([curses])

  dnl When searching for the terminfo functions, prefer libtermcap over
  dnl libxcurses and libcurses, because it is smaller.
  AC_CACHE_CHECK([where terminfo library functions come from], [gl_cv_terminfo], [
    gl_cv_terminfo="not found, consider installing GNU ncurses"
    AC_TRY_LINK([extern
      #ifdef __cplusplus
      "C"
      #endif
      int setupterm (const char *, int, int *);
      extern
      #ifdef __cplusplus
      "C"
      #endif
      int tigetnum (const char *);
      extern
      #ifdef __cplusplus
      "C"
      #endif
      int tigetflag (const char *);
      extern
      #ifdef __cplusplus
      "C"
      #endif
      const char * tigetstr (const char *);
      ], [return setupterm ("xterm", 0, (int *)0)
                 + tigetnum ("colors")
                 + tigetflag ("hc") + * tigetstr("oc");],
      [gl_cv_terminfo=libc])
    if test "$gl_cv_terminfo" != libc; then
      gl_save_LIBS="$LIBS"
      LIBS="$LIBS $LIBNCURSES"
      AC_TRY_LINK([extern
        #ifdef __cplusplus
        "C"
        #endif
        int setupterm (const char *, int, int *);
        extern
        #ifdef __cplusplus
        "C"
        #endif
        int tigetnum (const char *);
        extern
        #ifdef __cplusplus
        "C"
        #endif
        int tigetflag (const char *);
        extern
        #ifdef __cplusplus
        "C"
        #endif
        const char * tigetstr (const char *);
        ], [return setupterm ("xterm", 0, (int *)0)
                   + tigetnum ("colors")
                   + tigetflag ("hc") + * tigetstr("oc");],
        [gl_cv_terminfo=libncurses])
      LIBS="$gl_save_LIBS"
      if test "$gl_cv_terminfo" != libncurses; then
        gl_save_LIBS="$LIBS"
        LIBS="$LIBS $LIBTERMCAP"
        AC_TRY_LINK([extern
          #ifdef __cplusplus
          "C"
          #endif
          int setupterm (const char *, int, int *);
          extern
          #ifdef __cplusplus
          "C"
          #endif
          int tigetnum (const char *);
          extern
          #ifdef __cplusplus
          "C"
          #endif
          int tigetflag (const char *);
          extern
          #ifdef __cplusplus
          "C"
          #endif
          const char * tigetstr (const char *);
          ], [return setupterm ("xterm", 0, (int *)0)
                     + tigetnum ("colors")
                     + tigetflag ("hc") + * tigetstr("oc");],
          [gl_cv_terminfo=libtermcap])
        LIBS="$gl_save_LIBS"
        if test "$gl_cv_terminfo" != libtermcap; then
          gl_save_LIBS="$LIBS"
          LIBS="$LIBS $LIBXCURSES"
          AC_TRY_LINK([extern
            #ifdef __cplusplus
            "C"
            #endif
            int setupterm (const char *, int, int *);
            extern
            #ifdef __cplusplus
            "C"
            #endif
            int tigetnum (const char *);
            extern
            #ifdef __cplusplus
            "C"
            #endif
            int tigetflag (const char *);
            extern
            #ifdef __cplusplus
            "C"
            #endif
            const char * tigetstr (const char *);
            ], [return setupterm ("xterm", 0, (int *)0)
                       + tigetnum ("colors")
                       + tigetflag ("hc") + * tigetstr("oc");],
            [gl_cv_terminfo=libxcurses])
          LIBS="$gl_save_LIBS"
          if test "$gl_cv_terminfo" != libxcurses; then
            gl_save_LIBS="$LIBS"
            LIBS="$LIBS $LIBCURSES"
            AC_TRY_LINK([extern
              #ifdef __cplusplus
              "C"
              #endif
              int setupterm (const char *, int, int *);
              extern
              #ifdef __cplusplus
              "C"
              #endif
              int tigetnum (const char *);
              extern
              #ifdef __cplusplus
              "C"
              #endif
              int tigetflag (const char *);
              extern
              #ifdef __cplusplus
              "C"
              #endif
              const char * tigetstr (const char *);
              ], [return setupterm ("xterm", 0, (int *)0)
                         + tigetnum ("colors")
                         + tigetflag ("hc") + * tigetstr("oc");],
              [gl_cv_terminfo=libcurses])
            LIBS="$gl_save_LIBS"
          fi
        fi
      fi
    fi
  ])
  case "$gl_cv_terminfo" in
    libc)
      LIBTERMINFO=
      LTLIBTERMINFO=
      INCTERMINFO=
      ;;
    libncurses)
      LIBTERMINFO="$LIBNCURSES"
      LTLIBTERMINFO="$LTLIBNCURSES"
      INCTERMINFO="$INCNCURSES"
      ;;
    libtermcap)
      LIBTERMINFO="$LIBTERMCAP"
      LTLIBTERMINFO="$LTLIBTERMCAP"
      INCTERMINFO="$INCTERMCAP"
      ;;
    libxcurses)
      LIBTERMINFO="$LIBXCURSES"
      LTLIBTERMINFO="$LTLIBXCURSES"
      INCTERMINFO="$INCXCURSES"
      ;;
    libcurses)
      LIBTERMINFO="$LIBCURSES"
      LTLIBTERMINFO="$LTLIBCURSES"
      INCTERMINFO="$INCCURSES"
      ;;
  esac
  case "$gl_cv_terminfo" in
    libc | libncurses | libtermcap | libxcurses | libcurses)
      AC_DEFINE([HAVE_TERMINFO], 1,
        [Define if setupterm(), tigetnum(), tigetstr(), tigetflag()
         are among the termcap library functions.])
      ;;
    *)
      dnl Use the termcap functions as a fallback.
      AC_CACHE_CHECK([where termcap library functions come from], [gl_cv_termcap], [
        gl_cv_termcap="not found, consider installing GNU ncurses"
        AC_TRY_LINK([extern
          #ifdef __cplusplus
          "C"
          #endif
          int tgetent (char *, const char *);
          ], [return tgetent ((char *) 0, "xterm");],
          [gl_cv_termcap=libc])
        if test "$gl_cv_termcap" != libc; then
          gl_save_LIBS="$LIBS"
          LIBS="$LIBS $LIBNCURSES"
          AC_TRY_LINK([extern
            #ifdef __cplusplus
            "C"
            #endif
            int tgetent (char *, const char *);
            ], [return tgetent ((char *) 0, "xterm");],
            [gl_cv_termcap=libncurses])
          LIBS="$gl_save_LIBS"
          if test "$gl_cv_termcap" != libncurses; then
            gl_save_LIBS="$LIBS"
            LIBS="$LIBS $LIBTERMCAP"
            AC_TRY_LINK([extern
              #ifdef __cplusplus
              "C"
              #endif
              int tgetent (char *, const char *);
              ], [return tgetent ((char *) 0, "xterm");],
              [gl_cv_termcap=libtermcap])
            LIBS="$gl_save_LIBS"
          fi
        fi
      ])
      case "$gl_cv_termcap" in
        libc)
          LIBTERMINFO=
          LTLIBTERMINFO=
          INCTERMINFO=
          ;;
        libncurses)
          LIBTERMINFO="$LIBNCURSES"
          LTLIBTERMINFO="$LTLIBNCURSES"
          INCTERMINFO="$INCNCURSES"
          ;;
        libtermcap)
          LIBTERMINFO="$LIBTERMCAP"
          LTLIBTERMINFO="$LTLIBTERMCAP"
          INCTERMINFO="$INCTERMCAP"
          ;;
      esac
      case "$gl_cv_termcap" in
        libc | libncurses | libtermcap)
          AC_DEFINE([HAVE_TERMCAP], 1,
            [Define if tgetent(), tgetnum(), tgetstr(), tgetflag()
             are among the termcap library functions.])
          ;;
      esac
      ;;
  esac
  AC_SUBST([LIBTERMINFO])
  AC_SUBST([LTLIBTERMINFO])
  AC_SUBST([INCTERMINFO])

  dnl Test against the old GNU termcap, which provides a tparam() function
  dnl instead of the classical tparm() function.
  AC_CACHE_CHECK([for tparam], [gl_cv_terminfo_tparam], [
    gl_save_LIBS="$LIBS"
    LIBS="$LIBS $LIBTERMINFO"
    gl_save_CPPFLAGS="$CPPFLAGS"
    CPPFLAGS="$CPPFLAGS $INCTERMINFO"
    AC_TRY_LINK([extern
      #ifdef __cplusplus
      "C"
      #endif
      char * tparam (const char *, void *, int, ...);
      char buf;
      ], [return tparam ("\033\133%dm", &buf, 1, 8);],
      [gl_cv_terminfo_tparam=yes], [gl_cv_terminfo_tparam=no])
    CPPFLAGS="$gl_save_CPPFLAGS"
    LIBS="$gl_save_LIBS"
  ])
  if test $gl_cv_terminfo_tparam = yes; then
    AC_DEFINE([HAVE_TPARAM], 1,
      [Define if tparam() is among the termcap library functions.])
  else
    dnl Test whether a tparm() function is provided. It is missing e.g.
    dnl in NetBSD 3.0 libtermcap.
    AC_CACHE_CHECK([for tparm], [gl_cv_terminfo_tparm], [
      gl_save_LIBS="$LIBS"
      LIBS="$LIBS $LIBTERMINFO"
      gl_save_CPPFLAGS="$CPPFLAGS"
      CPPFLAGS="$CPPFLAGS $INCTERMINFO"
      AC_TRY_LINK([extern
        #ifdef __cplusplus
        "C"
        #endif
        char * tparm (const char *, ...);
        ], [return tparm ("\033\133%dm", 8);],
        [gl_cv_terminfo_tparm=yes], [gl_cv_terminfo_tparm=no])
      CPPFLAGS="$gl_save_CPPFLAGS"
      LIBS="$gl_save_LIBS"
    ])
  fi
])