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(Qload_file_name, Vload_file_name): New variables.

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(syms_of_lread): Initialize and staticpro it.
(Fload): Bind it.
(read_list): Before dumping, ignore (#$ . WHATEVER)--return 0.
This commit is contained in:
Richard M. Stallman 1994-12-21 18:14:20 +00:00
parent b5ff43cc2e
commit 20ea2964cd
1 changed files with 49 additions and 3 deletions
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52
src/lread.c
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@ -67,7 +67,7 @@ extern int errno;
Lisp_Object Qread_char, Qget_file_char, Qstandard_input, Qcurrent_load_list;
Lisp_Object Qvariable_documentation, Vvalues, Vstandard_input, Vafter_load_alist;
Lisp_Object Qascii_character, Qload;
Lisp_Object Qascii_character, Qload, Qload_file_name;
extern Lisp_Object Qevent_symbol_element_mask;
@ -81,9 +81,12 @@ Lisp_Object Vload_path;
lists of defs in their load files. */
Lisp_Object Vload_history;
/* This is useud to build the load history. */
/* This is used to build the load history. */
Lisp_Object Vcurrent_load_list;
/* Name of file actually being read by `load'. */
Lisp_Object Vload_file_name;
/* List of descriptors now open for Fload. */
static Lisp_Object load_descriptor_list;
@ -436,6 +439,7 @@ Return t if file exists.")
XSETFASTINT (XCONS (lispstream)->cdr, (EMACS_UINT)stream & 0xffff);
record_unwind_protect (load_unwind, lispstream);
record_unwind_protect (load_descriptor_unwind, load_descriptor_list);
specbind (Qload_file_name, found);
load_descriptor_list
= Fcons (make_number (fileno (stream)), load_descriptor_list);
load_in_progress++;
@ -1183,6 +1187,31 @@ read1 (readcharfun, pch)
return tmp;
}
#endif
/* #@NUMBER is used to skip NUMBER following characters.
That's used in .elc files to skip over doc strings
and function definitions. */
if (c == '@')
{
int i, nskip = 0;
/* Read a decimal integer. */
while ((c = READCHAR) >= 0
&& c >= '0' && c <= '9')
{
nskip *= 10;
nskip += c - '0';
}
if (c >= 0)
UNREAD (c);
/* Skip that many characters. */
for (i = 0; i < nskip && c >= 0; i++)
c = READCHAR;
goto retry;
}
if (c == '$')
return Vload_file_name;
UNREAD (c);
Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil));
@ -1471,6 +1500,7 @@ read_list (flag, readcharfun)
Lisp_Object val, tail;
register Lisp_Object elt, tem;
struct gcpro gcpro1, gcpro2;
int cancel = 0;
val = Qnil;
tail = Qnil;
@ -1481,6 +1511,15 @@ read_list (flag, readcharfun)
GCPRO2 (val, tail);
elt = read1 (readcharfun, &ch);
UNGCPRO;
/* If purifying, and the list starts with #$,
return 0 instead. This is a doc string reference
and it will be replaced anyway by Snarf-documentation,
so don't waste pure space with it. */
if (EQ (elt, Vload_file_name)
&& !NILP (Vpurify_flag) && NILP (Vdoc_file_name))
cancel = 1;
if (ch)
{
if (flag > 0)
@ -1501,7 +1540,7 @@ read_list (flag, readcharfun)
read1 (readcharfun, &ch);
UNGCPRO;
if (ch == ')')
return val;
return (cancel ? make_number (0) : val);
return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil));
}
return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil));
@ -2020,6 +2059,10 @@ The remaining elements of each list are symbols defined as functions\n\
or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'.");
Vload_history = Qnil;
DEFVAR_LISP ("load-file-name", &Vload_file_name,
"Full name of file being loaded by `load'.");
Vload_file_name = Qnil;
DEFVAR_LISP ("current-load-list", &Vcurrent_load_list,
"Used for internal purposes by `load'.");
Vcurrent_load_list = Qnil;
@ -2044,4 +2087,7 @@ or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'.");
Qload = intern ("load");
staticpro (&Qload);
Qload_file_name = intern ("load-file-name");
staticpro (&Qload_file_name);
}