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add %file-port-name-canonicalization option

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* libguile/fports.c (%file-port-name-canonicalization): New global var.
  (fport_canonicalize_filename): New helper. If
  %file-port-name-canonicalization is 'absolute, then run file port
  names through canonicalize_path; if it's 'relative, then canonicalize
  the name, but strip off load paths; otherwise leave the port name
  alone.
  (scm_open_file): Use fport_canonicalize_filename.
  (scm_init_fports): Define %file-port-name-canonicalization.
This commit is contained in:
Andy Wingo 2010-04-19 13:14:43 +02:00
parent 427c73b9ca
commit 0157a34157
1 changed files with 61 additions and 1 deletions
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62
libguile/fports.c
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@ -266,6 +266,61 @@ SCM_DEFINE (scm_file_port_p, "file-port?", 1, 0, 0,
#undef FUNC_NAME
static SCM* loc_file_port_name_canonicalization;
SCM_SYMBOL (sym_relative, "relative");
SCM_SYMBOL (sym_absolute, "absolute");
static SCM
fport_canonicalize_filename (SCM filename)
{
if (!scm_is_string (filename))
{
return filename;
}
else if (scm_is_eq (*loc_file_port_name_canonicalization, sym_relative))
{
char *str, *canon;
SCM scanon, load_path;
str = scm_to_locale_string (filename);
canon = canonicalize_file_name (str);
free (str);
if (!canon)
return filename;
scanon = scm_take_locale_string (canon);
for (load_path = scm_variable_ref
(scm_c_module_lookup (scm_the_root_module (), "%load-path"));
scm_is_pair (load_path);
load_path = scm_cdr (load_path))
if (scm_is_true (scm_string_prefix_p (scm_car (load_path),
scanon,
SCM_UNDEFINED, SCM_UNDEFINED,
SCM_UNDEFINED, SCM_UNDEFINED)))
return scm_substring (scanon,
scm_string_length (scm_car (load_path)),
SCM_UNDEFINED);
return filename;
}
else if (scm_is_eq (*loc_file_port_name_canonicalization, sym_absolute))
{
char *str, *canon;
str = scm_to_locale_string (filename);
canon = canonicalize_file_name (str);
free (str);
return canon ? scm_take_locale_string (canon) : filename;
}
else
{
return filename;
}
}
/* scm_open_file
* Return a new port open on a given file.
*
@ -386,7 +441,8 @@ SCM_DEFINE (scm_open_file, "open-file", 2, 0, 0,
}
}
port = scm_i_fdes_to_port (fdes, scm_i_mode_bits (mode), filename);
port = scm_i_fdes_to_port (fdes, scm_i_mode_bits (mode),
fport_canonicalize_filename (filename));
scm_dynwind_end ();
@ -894,6 +950,10 @@ scm_init_fports ()
scm_c_define ("_IOLBF", scm_from_int (_IOLBF));
scm_c_define ("_IONBF", scm_from_int (_IONBF));
loc_file_port_name_canonicalization =
SCM_VARIABLE_LOC (scm_c_define ("%file-port-name-canonicalization",
SCM_BOOL_F));
#include "libguile/fports.x"
}