altos/scheme: Rename to 'scheme', clean up build

[fw/altos] / src / scheme / ao_scheme_string.c

diff --git a/src/scheme/ao_scheme_string.c b/src/scheme/ao_scheme_string.c
new file mode 100644 (file)
index 0000000..e25306c
--- /dev/null
+++ b/src/scheme/ao_scheme_string.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright © 2016 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao_scheme.h"
+
+static void string_mark(void *addr)
+{
+       (void) addr;
+}
+
+static int string_size(void *addr)
+{
+       if (!addr)
+               return 0;
+       return strlen(addr) + 1;
+}
+
+static void string_move(void *addr)
+{
+       (void) addr;
+}
+
+const struct ao_scheme_type ao_scheme_string_type = {
+       .mark = string_mark,
+       .size = string_size,
+       .move = string_move,
+       .name = "string",
+};
+
+char *
+ao_scheme_string_copy(char *a)
+{
+       int     alen = strlen(a);
+
+       ao_scheme_string_stash(0, a);
+       char    *r = ao_scheme_alloc(alen + 1);
+       a = ao_scheme_string_fetch(0);
+       if (!r)
+               return NULL;
+       strcpy(r, a);
+       return r;
+}
+
+char *
+ao_scheme_string_cat(char *a, char *b)
+{
+       int     alen = strlen(a);
+       int     blen = strlen(b);
+
+       ao_scheme_string_stash(0, a);
+       ao_scheme_string_stash(1, b);
+       char    *r = ao_scheme_alloc(alen + blen + 1);
+       a = ao_scheme_string_fetch(0);
+       b = ao_scheme_string_fetch(1);
+       if (!r)
+               return NULL;
+       strcpy(r, a);
+       strcpy(r+alen, b);
+       return r;
+}
+
+ao_poly
+ao_scheme_string_pack(struct ao_scheme_cons *cons)
+{
+       int     len = ao_scheme_cons_length(cons);
+       ao_scheme_cons_stash(0, cons);
+       char    *r = ao_scheme_alloc(len + 1);
+       cons = ao_scheme_cons_fetch(0);
+       char    *s = r;
+
+       while (cons) {
+               if (!ao_scheme_integer_typep(ao_scheme_poly_type(cons->car)))
+                       return ao_scheme_error(AO_SCHEME_INVALID, "non-int passed to pack");
+               *s++ = ao_scheme_poly_integer(cons->car);
+               cons = ao_scheme_poly_cons(cons->cdr);
+       }
+       *s++ = 0;
+       return ao_scheme_string_poly(r);
+}
+
+ao_poly
+ao_scheme_string_unpack(char *a)
+{
+       struct ao_scheme_cons   *cons = NULL, *tail = NULL;
+       int                     c;
+       int                     i;
+
+       for (i = 0; (c = a[i]); i++) {
+               ao_scheme_cons_stash(0, cons);
+               ao_scheme_cons_stash(1, tail);
+               ao_scheme_string_stash(0, a);
+               struct ao_scheme_cons   *n = ao_scheme_cons_cons(ao_scheme_int_poly(c), AO_SCHEME_NIL);
+               a = ao_scheme_string_fetch(0);
+               cons = ao_scheme_cons_fetch(0);
+               tail = ao_scheme_cons_fetch(1);
+
+               if (!n) {
+                       cons = NULL;
+                       break;
+               }
+               if (tail)
+                       tail->cdr = ao_scheme_cons_poly(n);
+               else
+                       cons = n;
+               tail = n;
+       }
+       return ao_scheme_cons_poly(cons);
+}
+
+void
+ao_scheme_string_write(ao_poly p)
+{
+       char    *s = ao_scheme_poly_string(p);
+       char    c;
+
+       putchar('"');
+       while ((c = *s++)) {
+               switch (c) {
+               case '\n':
+                       printf ("\\n");
+                       break;
+               case '\r':
+                       printf ("\\r");
+                       break;
+               case '\t':
+                       printf ("\\t");
+                       break;
+               default:
+                       if (c < ' ')
+                               printf("\\%03o", c);
+                       else
+                               putchar(c);
+                       break;
+               }
+       }
+       putchar('"');
+}
+
+void
+ao_scheme_string_display(ao_poly p)
+{
+       char    *s = ao_scheme_poly_string(p);
+       char    c;
+
+       while ((c = *s++))
+               putchar(c);
+}