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core: read_string: Allow for gc. 

* src/posix.c (read_char): Add optional port parameter.
(read_string): Allow for gc.
This commit is contained in:
Jan Nieuwenhuizen 2018-11-11 10:17:50 +01:00
parent 280b763ae8
commit b85db01e9b
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GPG Key ID: F3C1A0D9C1D65273
1 changed files with 17 additions and 8 deletions
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25
src/posix.c
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@ -93,9 +93,14 @@ peek_char ()
}
SCM
read_char ()
read_char (SCM port) ///((arity . n))
{
return MAKE_CHAR (readchar ());
int fd = g_stdin;
if (TYPE (port) == TPAIR && TYPE (car (port)) == TNUMBER)
g_stdin = VALUE (CAR (port));
SCM c = MAKE_CHAR (readchar ());
g_stdin = fd;
return c;
}
SCM
@ -118,15 +123,19 @@ read_string (SCM port) ///((arity . n))
int fd = g_stdin;
if (TYPE (port) == TPAIR && TYPE (car (port)) == TNUMBER)
g_stdin = VALUE (CAR (port));
SCM lst = cell_nil;
SCM c = read_char ();
while (VALUE (c) != -1)
gc_push_frame ();
r0 = cell_nil;
r1 = read_char (cell_nil);
while (VALUE (r1) != -1)
{
lst = append2 (lst, cons (c, cell_nil));
c = read_char ();
r0 = cons (r1, r0);
r1 = read_char (cell_nil);
gc_check ();
}
g_stdin = fd;
return MAKE_STRING (lst);
SCM lst = MAKE_STRING (reverse_x_ (r0, cell_nil));
gc_pop_frame ();
return lst;
}
SCM