--- /dev/null
+/*
+ * 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef _AO_LISP_H_
+#define _AO_LISP_H_
+
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+
+# define AO_LISP_CONS 0
+# define AO_LISP_INT 1
+# define AO_LISP_STRING 2
+# define AO_LISP_OTHER 3
+
+# define AO_LISP_ATOM 4
+# define AO_LISP_BUILTIN 5
+
+# define AO_LISP_NIL 0
+
+#define AO_LISP_POOL 1024
+#define AO_LISP_ROOT 16
+
+static inline void *ao_lisp_set_ref(void *addr) {
+ return (void *) ((intptr_t)addr | 1);
+}
+
+static inline void *ao_lisp_clear_ref(void *addr) {
+ return (void *) ((intptr_t)addr & ~1);
+}
+
+extern uint8_t ao_lisp_pool[AO_LISP_POOL];
+
+struct ao_lisp_mem_type {
+ void (*mark)(void *addr);
+ int (*size)(void *addr);
+ void (*move)(void *addr);
+};
+
+typedef intptr_t ao_lisp_poly;
+
+struct ao_lisp_cons {
+ ao_lisp_poly car;
+ struct ao_lisp_cons *cdr;
+};
+
+struct ao_lisp_atom {
+ uint8_t type;
+ ao_lisp_poly val;
+ struct ao_lisp_atom *next;
+ char name[];
+};
+
+#define AO_LISP_ATOM_CONST ((struct ao_lisp_atom *) (intptr_t) 1)
+
+extern const struct ao_lisp_atom *ao_lisp_builtins[];
+
+struct ao_lisp_builtin {
+ uint8_t type;
+ ao_lisp_poly (*func)(struct ao_lisp_cons *cons);
+ char name[];
+};
+
+static inline void *
+ao_lisp_poly_other(ao_lisp_poly poly) {
+ return (void *) (poly - AO_LISP_OTHER);
+}
+
+static const inline ao_lisp_poly
+ao_lisp_other_poly(const void *other)
+{
+ return (ao_lisp_poly) other + AO_LISP_OTHER;
+}
+
+#define AO_LISP_OTHER_POLY(other) ((ao_lisp_poly)(other) + AO_LISP_OTHER)
+
+static inline int ao_lisp_poly_type(ao_lisp_poly poly) {
+ int type = poly & 3;
+ if (type == AO_LISP_OTHER)
+ return *((uint8_t *) ao_lisp_poly_other(poly));
+ return type;
+}
+
+static inline struct ao_lisp_cons *
+ao_lisp_poly_cons(ao_lisp_poly poly)
+{
+ return (struct ao_lisp_cons *) (poly - AO_LISP_CONS);
+}
+
+static inline ao_lisp_poly
+ao_lisp_cons_poly(struct ao_lisp_cons *cons)
+{
+ return (ao_lisp_poly) cons + AO_LISP_CONS;
+}
+
+static inline int
+ao_lisp_poly_int(ao_lisp_poly poly)
+{
+ return (int) (poly >> 2);
+}
+
+static inline ao_lisp_poly
+ao_lisp_int_poly(int i)
+{
+ return ((ao_lisp_poly) i << 2) + AO_LISP_INT;
+}
+
+static inline char *
+ao_lisp_poly_string(ao_lisp_poly poly)
+{
+ return (char *) (poly - AO_LISP_STRING);
+}
+
+static inline ao_lisp_poly
+ao_lisp_string_poly(char *s) {
+ return (ao_lisp_poly) s + AO_LISP_STRING;
+}
+
+static inline struct ao_lisp_atom *
+ao_lisp_poly_atom(ao_lisp_poly poly)
+{
+ return (struct ao_lisp_atom *) (poly - AO_LISP_OTHER);
+}
+
+static inline ao_lisp_poly
+ao_lisp_atom_poly(struct ao_lisp_atom *a)
+{
+ return (ao_lisp_poly) a + AO_LISP_OTHER;
+}
+
+static inline struct ao_lisp_builtin *
+ao_lisp_poly_builtin(ao_lisp_poly poly)
+{
+ return (struct ao_lisp_builtin *) (poly - AO_LISP_OTHER);
+}
+
+static inline ao_lisp_poly
+ao_lisp_builtin_poly(struct ao_lisp_builtin *b)
+{
+ return (ao_lisp_poly) b + AO_LISP_OTHER;
+}
+
+/* memory functions */
+
+void
+ao_lisp_mark(const struct ao_lisp_mem_type *type, void *addr);
+
+/* returns 1 if the object was already marked */
+int
+ao_lisp_mark_memory(void *addr, int size);
+
+void *
+ao_lisp_move(const struct ao_lisp_mem_type *type, void *addr);
+
+/* returns NULL if the object was already moved */
+void *
+ao_lisp_move_memory(void *addr, int size);
+
+void *
+ao_lisp_alloc(int size);
+
+int
+ao_lisp_root_add(const struct ao_lisp_mem_type *type, void *addr);
+
+void
+ao_lisp_root_clear(void *addr);
+
+/* cons */
+extern const struct ao_lisp_mem_type ao_lisp_cons_type;
+
+struct ao_lisp_cons *
+ao_lisp_cons(ao_lisp_poly car, struct ao_lisp_cons *cdr);
+
+void
+ao_lisp_cons_print(struct ao_lisp_cons *cons);
+
+/* string */
+extern const struct ao_lisp_mem_type ao_lisp_string_type;
+
+char *
+ao_lisp_string_new(int len);
+
+char *
+ao_lisp_string_copy(char *a);
+
+char *
+ao_lisp_string_cat(char *a, char *b);
+
+void
+ao_lisp_string_print(char *s);
+
+/* atom */
+extern const struct ao_lisp_mem_type ao_lisp_atom_type;
+
+void
+ao_lisp_atom_init(void);
+
+void
+ao_lisp_atom_print(struct ao_lisp_atom *atom);
+
+struct ao_lisp_atom *
+ao_lisp_atom_intern(char *name);
+
+/* int */
+void
+ao_lisp_int_print(int i);
+
+/* prim */
+ao_lisp_poly
+ao_lisp_poly_print(ao_lisp_poly p);
+
+void
+ao_lisp_poly_mark(ao_lisp_poly p);
+
+ao_lisp_poly
+ao_lisp_poly_move(ao_lisp_poly p);
+
+/* eval */
+ao_lisp_poly
+ao_lisp_eval(ao_lisp_poly p);
+
+/* builtin */
+void
+ao_lisp_builtin_print(struct ao_lisp_builtin *b);
+
+/* read */
+ao_lisp_poly
+ao_lisp_read(void);
+
+#endif /* _AO_LISP_H_ */
static struct ao_lisp_cons *formals_tail;
static uint8_t been_here;
+#if 0
+#define DBG(...) printf(__VA_ARGS__)
+#define DBG_CONS(a) ao_lisp_cons_print(a)
+#define DBG_POLY(a) ao_lisp_poly_print(a)
+#else
+#define DBG(...)
+#define DBG_CONS(a)
+#define DBG_POLY(a)
+#endif
+
ao_lisp_poly
ao_lisp_eval(ao_lisp_poly v)
{
formals_tail = NULL;
v = actuals->car;
- printf("start: stack"); ao_lisp_cons_print(stack); printf("\n");
- printf("start: actuals"); ao_lisp_cons_print(actuals); printf("\n");
- printf("start: formals"); ao_lisp_cons_print(formals); printf("\n");
+ DBG("start: stack"); DBG_CONS(stack); DBG("\n");
+ DBG("start: actuals"); DBG_CONS(actuals); DBG("\n");
+ DBG("start: formals"); DBG_CONS(formals); DBG("\n");
}
/* Evaluate primitive types */
}
for (;;) {
- printf("add formal: "); ao_lisp_poly_print(v); printf("\n");
+ DBG("add formal: "); DBG_POLY(v); DBG("\n");
formal = ao_lisp_cons(v, NULL);
if (formals_tail)
formals_tail = formal;
actuals = actuals->cdr;
- printf("formals: ");
- ao_lisp_cons_print(formals);
- printf("\n");
- printf("actuals: ");
- ao_lisp_cons_print(actuals);
- printf("\n");
+ DBG("formals: ");
+ DBG_CONS(formals);
+ DBG("\n");
+ DBG("actuals: ");
+ DBG_CONS(actuals);
+ DBG("\n");
/* Process all of the arguments */
if (actuals) {
v = actuals->car;
- printf ("actual: "); ao_lisp_poly_print(v); printf("\n");
+ DBG ("actual: "); DBG_POLY(v); DBG("\n");
break;
}
v = b->func(formals->cdr);
- printf ("eval: ");
- ao_lisp_cons_print(formals);
- printf(" -> ");
- ao_lisp_poly_print(v);
- printf ("\n");
+ DBG ("eval: ");
+ DBG_CONS(formals);
+ DBG(" -> ");
+ DBG_POLY(v);
+ DBG ("\n");
} else {
- printf ("invalid eval\n");
+ DBG ("invalid eval\n");
}
if (--cons) {
formals_tail = formal;
stack = stack->cdr;
- printf("stack pop: stack"); ao_lisp_cons_print(stack); printf("\n");
- printf("stack pop: actuals"); ao_lisp_cons_print(actuals); printf("\n");
- printf("stack pop: formals"); ao_lisp_cons_print(formals); printf("\n");
+ DBG("stack pop: stack"); DBG_CONS(stack); DBG("\n");
+ DBG("stack pop: actuals"); DBG_CONS(actuals); DBG("\n");
+ DBG("stack pop: formals"); DBG_CONS(formals); DBG("\n");
} else {
- printf("done func\n");
+ DBG("done func\n");
break;
}
}
#include "ao_lisp.h"
-const uint32_t classTable[256] = {
- IGNORE, /* ^@ */
- IGNORE, /* ^A */
- IGNORE, /* ^B */
- IGNORE, /* ^C */
- IGNORE, /* ^D */
- IGNORE, /* ^E */
- IGNORE, /* ^F */
- IGNORE, /* ^G */
- IGNORE, /* ^H */
- WHITE, /* ^I */
- WHITE, /* ^J */
- WHITE, /* ^K */
- WHITE, /* ^L */
- WHITE, /* ^M */
- IGNORE, /* ^N */
- IGNORE, /* ^O */
- IGNORE, /* ^P */
- IGNORE, /* ^Q */
- IGNORE, /* ^R */
- IGNORE, /* ^S */
- IGNORE, /* ^T */
- IGNORE, /* ^U */
- IGNORE, /* ^V */
- IGNORE, /* ^W */
- IGNORE, /* ^X */
- IGNORE, /* ^Y */
- IGNORE, /* ^Z */
- IGNORE, /* ^[ */
- IGNORE, /* ^\ */
- IGNORE, /* ^] */
- IGNORE, /* ^^ */
- IGNORE, /* ^_ */
- PRINTABLE|WHITE, /* */
- PRINTABLE, /* ! */
- PRINTABLE|STRINGC, /* " */
- PRINTABLE|COMMENT, /* # */
- PRINTABLE, /* $ */
- PRINTABLE, /* % */
- PRINTABLE, /* & */
- PRINTABLE|QUOTEC, /* ' */
- PRINTABLE|BRA, /* ( */
- PRINTABLE|KET, /* ) */
- PRINTABLE, /* * */
- PRINTABLE|SIGN, /* + */
- PRINTABLE, /* , */
- PRINTABLE|SIGN, /* - */
- PRINTABLE|DOT, /* . */
- PRINTABLE, /* / */
- PRINTABLE|DIGIT, /* 0 */
- PRINTABLE|DIGIT, /* 1 */
- PRINTABLE|DIGIT, /* 2 */
- PRINTABLE|DIGIT, /* 3 */
- PRINTABLE|DIGIT, /* 4 */
- PRINTABLE|DIGIT, /* 5 */
- PRINTABLE|DIGIT, /* 6 */
- PRINTABLE|DIGIT, /* 7 */
- PRINTABLE|DIGIT, /* 8 */
- PRINTABLE|DIGIT, /* 9 */
- PRINTABLE, /* : */
- PRINTABLE|COMMENT, /* ; */
- PRINTABLE, /* < */
- PRINTABLE, /* = */
- PRINTABLE, /* > */
- PRINTABLE, /* ? */
- PRINTABLE, /* @ */
- PRINTABLE, /* A */
- PRINTABLE, /* B */
- PRINTABLE, /* C */
- PRINTABLE, /* D */
- PRINTABLE|EXP, /* E */
- PRINTABLE, /* F */
- PRINTABLE, /* G */
- PRINTABLE, /* H */
- PRINTABLE, /* I */
- PRINTABLE, /* J */
- PRINTABLE, /* K */
- PRINTABLE, /* L */
- PRINTABLE, /* M */
- PRINTABLE, /* N */
- PRINTABLE, /* O */
- PRINTABLE, /* P */
- PRINTABLE, /* Q */
- PRINTABLE, /* R */
- PRINTABLE, /* S */
- PRINTABLE, /* T */
- PRINTABLE, /* U */
- PRINTABLE, /* V */
- PRINTABLE, /* W */
- PRINTABLE, /* X */
- PRINTABLE, /* Y */
- PRINTABLE, /* Z */
- PRINTABLE|BRA, /* [ */
- PRINTABLE|BACKSLASH, /* \ */
- PRINTABLE|KET, /* ] */
- PRINTABLE, /* ^ */
- PRINTABLE, /* _ */
- PRINTABLE, /* ` */
- PRINTABLE, /* a */
- PRINTABLE, /* b */
- PRINTABLE, /* c */
- PRINTABLE, /* d */
- PRINTABLE|EXP, /* e */
- PRINTABLE, /* f */
- PRINTABLE, /* g */
- PRINTABLE, /* h */
- PRINTABLE, /* i */
- PRINTABLE, /* j */
- PRINTABLE, /* k */
- PRINTABLE, /* l */
- PRINTABLE, /* m */
- PRINTABLE, /* n */
- PRINTABLE, /* o */
- PRINTABLE, /* p */
- PRINTABLE, /* q */
- PRINTABLE, /* r */
- PRINTABLE, /* s */
- PRINTABLE, /* t */
- PRINTABLE, /* u */
- PRINTABLE, /* v */
- PRINTABLE, /* w */
- PRINTABLE, /* x */
- PRINTABLE, /* y */
- PRINTABLE, /* z */
- PRINTABLE|BRA, /* { */
- PRINTABLE|VBAR, /* | */
- PRINTABLE|KET, /* } */
- PRINTABLE|TWIDDLE, /* ~ */
- IGNORE, /* ^? */
-};
{
int i;
- printf("collect\n");
/* Mark */
memset(ao_lisp_busy, '\0', sizeof (ao_lisp_busy));
for (i = 0; i < AO_LISP_ROOT; i++)
--- /dev/null
+/*
+ * 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include "ao_lisp.h"
+#include "ao_lisp_read.h"
+
+static const uint16_t lex_classes[128] = {
+ IGNORE, /* ^@ */
+ IGNORE, /* ^A */
+ IGNORE, /* ^B */
+ IGNORE, /* ^C */
+ IGNORE, /* ^D */
+ IGNORE, /* ^E */
+ IGNORE, /* ^F */
+ IGNORE, /* ^G */
+ IGNORE, /* ^H */
+ WHITE, /* ^I */
+ WHITE, /* ^J */
+ WHITE, /* ^K */
+ WHITE, /* ^L */
+ WHITE, /* ^M */
+ IGNORE, /* ^N */
+ IGNORE, /* ^O */
+ IGNORE, /* ^P */
+ IGNORE, /* ^Q */
+ IGNORE, /* ^R */
+ IGNORE, /* ^S */
+ IGNORE, /* ^T */
+ IGNORE, /* ^U */
+ IGNORE, /* ^V */
+ IGNORE, /* ^W */
+ IGNORE, /* ^X */
+ IGNORE, /* ^Y */
+ IGNORE, /* ^Z */
+ IGNORE, /* ^[ */
+ IGNORE, /* ^\ */
+ IGNORE, /* ^] */
+ IGNORE, /* ^^ */
+ IGNORE, /* ^_ */
+ PRINTABLE|WHITE, /* */
+ PRINTABLE, /* ! */
+ PRINTABLE|STRINGC, /* " */
+ PRINTABLE|COMMENT, /* # */
+ PRINTABLE, /* $ */
+ PRINTABLE, /* % */
+ PRINTABLE, /* & */
+ PRINTABLE|QUOTEC, /* ' */
+ PRINTABLE|BRA, /* ( */
+ PRINTABLE|KET, /* ) */
+ PRINTABLE, /* * */
+ PRINTABLE|SIGN, /* + */
+ PRINTABLE, /* , */
+ PRINTABLE|SIGN, /* - */
+ PRINTABLE, /* . */
+ PRINTABLE, /* / */
+ PRINTABLE|DIGIT, /* 0 */
+ PRINTABLE|DIGIT, /* 1 */
+ PRINTABLE|DIGIT, /* 2 */
+ PRINTABLE|DIGIT, /* 3 */
+ PRINTABLE|DIGIT, /* 4 */
+ PRINTABLE|DIGIT, /* 5 */
+ PRINTABLE|DIGIT, /* 6 */
+ PRINTABLE|DIGIT, /* 7 */
+ PRINTABLE|DIGIT, /* 8 */
+ PRINTABLE|DIGIT, /* 9 */
+ PRINTABLE, /* : */
+ PRINTABLE|COMMENT, /* ; */
+ PRINTABLE, /* < */
+ PRINTABLE, /* = */
+ PRINTABLE, /* > */
+ PRINTABLE, /* ? */
+ PRINTABLE, /* @ */
+ PRINTABLE, /* A */
+ PRINTABLE, /* B */
+ PRINTABLE, /* C */
+ PRINTABLE, /* D */
+ PRINTABLE, /* E */
+ PRINTABLE, /* F */
+ PRINTABLE, /* G */
+ PRINTABLE, /* H */
+ PRINTABLE, /* I */
+ PRINTABLE, /* J */
+ PRINTABLE, /* K */
+ PRINTABLE, /* L */
+ PRINTABLE, /* M */
+ PRINTABLE, /* N */
+ PRINTABLE, /* O */
+ PRINTABLE, /* P */
+ PRINTABLE, /* Q */
+ PRINTABLE, /* R */
+ PRINTABLE, /* S */
+ PRINTABLE, /* T */
+ PRINTABLE, /* U */
+ PRINTABLE, /* V */
+ PRINTABLE, /* W */
+ PRINTABLE, /* X */
+ PRINTABLE, /* Y */
+ PRINTABLE, /* Z */
+ PRINTABLE, /* [ */
+ PRINTABLE|BACKSLASH, /* \ */
+ PRINTABLE, /* ] */
+ PRINTABLE, /* ^ */
+ PRINTABLE, /* _ */
+ PRINTABLE, /* ` */
+ PRINTABLE, /* a */
+ PRINTABLE, /* b */
+ PRINTABLE, /* c */
+ PRINTABLE, /* d */
+ PRINTABLE, /* e */
+ PRINTABLE, /* f */
+ PRINTABLE, /* g */
+ PRINTABLE, /* h */
+ PRINTABLE, /* i */
+ PRINTABLE, /* j */
+ PRINTABLE, /* k */
+ PRINTABLE, /* l */
+ PRINTABLE, /* m */
+ PRINTABLE, /* n */
+ PRINTABLE, /* o */
+ PRINTABLE, /* p */
+ PRINTABLE, /* q */
+ PRINTABLE, /* r */
+ PRINTABLE, /* s */
+ PRINTABLE, /* t */
+ PRINTABLE, /* u */
+ PRINTABLE, /* v */
+ PRINTABLE, /* w */
+ PRINTABLE, /* x */
+ PRINTABLE, /* y */
+ PRINTABLE, /* z */
+ PRINTABLE, /* { */
+ PRINTABLE|VBAR, /* | */
+ PRINTABLE, /* } */
+ PRINTABLE|TWIDDLE, /* ~ */
+ IGNORE, /* ^? */
+};
+
+static int lex_unget_c;
+
+static inline int
+lex_get()
+{
+ int c;
+ if (lex_unget_c) {
+ c = lex_unget_c;
+ lex_unget_c = 0;
+ } else
+ c = getchar();
+ return c;
+}
+
+static inline void
+lex_unget(int c)
+{
+ if (c != EOF)
+ lex_unget_c = c;
+}
+
+static int
+lex_quoted (void)
+{
+ int c;
+ int v;
+ int count;
+
+ c = lex_get();
+// if (jumping)
+// return nil;
+ if (c == EOF)
+ return EOF;
+ c &= 0x7f;
+ switch (c) {
+ case 'n':
+ return '\n';
+ case 'f':
+ return '\f';
+ case 'b':
+ return '\b';
+ case 'r':
+ return '\r';
+ case 'v':
+ return '\v';
+ case 't':
+ return '\t';
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ v = c - '0';
+ count = 1;
+ while (count <= 3) {
+ c = lex_get();
+// if (jumping)
+// return nil;
+ if (c == EOF)
+ return EOF;
+ c &= 0x7f;
+ if (c < '0' || '7' < c) {
+ lex_unget(c);
+ break;
+ }
+ v = (v << 3) + c - '0';
+ ++count;
+ }
+ return v;
+ default:
+ return c;
+ }
+}
+
+static uint16_t lex_class;
+
+static int
+lexc(void)
+{
+ int c;
+ do {
+ c = lex_get();
+ if (c == EOF) {
+ lex_class = ENDOFFILE;
+ c = 0;
+ } else {
+ c &= 0x7f;
+ lex_class = lex_classes[c];
+ if (lex_class & BACKSLASH) {
+ c = lex_quoted();
+ if (c == EOF)
+ lex_class = ENDOFFILE;
+ else
+ lex_class = PRINTABLE;
+ }
+ }
+ } while (lex_class & IGNORE);
+ return c;
+}
+
+#define AO_LISP_TOKEN_MAX 32
+
+static char token_string[AO_LISP_TOKEN_MAX];
+static int token_int;
+static int token_len;
+
+static inline void add_token(int c) {
+ if (c && token_len < AO_LISP_TOKEN_MAX - 1)
+ token_string[token_len++] = c;
+}
+
+static inline void end_token(void) {
+ token_string[token_len] = '\0';
+}
+
+static int
+lex(void)
+{
+ int c;
+
+ token_len = 0;
+ for (;;) {
+ c = lexc();
+ if (lex_class & ENDOFFILE)
+ return AO_LISP_NIL;
+
+// if (jumping)
+// return nil;
+ if (lex_class & WHITE)
+ continue;
+
+ if (lex_class & (BRA|KET|QUOTEC)) {
+ add_token(c);
+ end_token();
+ switch (c) {
+ case '(':
+ return OPEN;
+ case ')':
+ return CLOSE;
+ case '\'':
+ return QUOTE;
+ }
+ }
+ if (lex_class & TWIDDLE) {
+ token_int = lexc();
+ return NUM;
+ }
+ if (lex_class & STRINGC) {
+ for (;;) {
+ c = lexc();
+// if (jumping)
+// return nil;
+ if (lex_class & (STRINGC|ENDOFFILE)) {
+ end_token();
+ return STRING;
+ }
+ add_token(c);
+ }
+ }
+ if (lex_class & PRINTABLE) {
+ int isnum;
+ int hasdigit;
+ int isneg;
+
+ isnum = 1;
+ hasdigit = 0;
+ token_int = 0;
+ isneg = 0;
+ for (;;) {
+ if (!(lex_class & NUMBER)) {
+ isnum = 0;
+ } else {
+ if (token_len != 0 &&
+ (lex_class & SIGN))
+ {
+ isnum = 0;
+ }
+ if (c == '-')
+ isneg = 1;
+ if (lex_class & DIGIT) {
+ hasdigit = 1;
+ if (isnum)
+ token_int = token_int * 10 + c - '0';
+ }
+ }
+ add_token (c);
+ c = lexc ();
+// if (jumping)
+// return nil;
+ if (lex_class & (NOTNAME)) {
+// if (lex_class & ENDOFFILE)
+// clearerr (f);
+ lex_unget(c);
+ end_token ();
+ if (isnum && hasdigit) {
+ if (isneg)
+ token_int = -token_int;
+ return NUM;
+ }
+ return NAME;
+ }
+ }
+
+ }
+ }
+}
+
+static int parse_token;
+static uint8_t been_here;
+static struct ao_lisp_cons *read_cons;
+static struct ao_lisp_cons *read_cons_tail;
+static struct ao_lisp_cons *read_stack;
+
+static ao_lisp_poly
+read_item(void)
+{
+ struct ao_lisp_atom *atom;
+ char *string;
+ int cons;
+ ao_lisp_poly v;
+
+ if (!been_here) {
+ ao_lisp_root_add(&ao_lisp_cons_type, &read_cons);
+ ao_lisp_root_add(&ao_lisp_cons_type, &read_cons_tail);
+ ao_lisp_root_add(&ao_lisp_cons_type, &read_stack);
+ }
+
+ cons = 0;
+ read_cons = read_cons_tail = read_stack = 0;
+ for (;;) {
+ while (parse_token == OPEN) {
+ if (cons++)
+ read_stack = ao_lisp_cons(ao_lisp_cons_poly(read_cons), read_stack);
+ read_cons = NULL;
+ read_cons_tail = NULL;
+ parse_token = lex();
+ }
+
+ switch (parse_token) {
+ case ENDOFFILE:
+ default:
+ v = AO_LISP_NIL;
+ break;
+ case NAME:
+ atom = ao_lisp_atom_intern(token_string);
+ if (atom)
+ v = ao_lisp_atom_poly(atom);
+ else
+ v = AO_LISP_NIL;
+ break;
+ case NUM:
+ v = ao_lisp_int_poly(token_int);
+ break;
+ case STRING:
+ string = ao_lisp_string_copy(token_string);
+ if (string)
+ v = ao_lisp_string_poly(string);
+ else
+ v = AO_LISP_NIL;
+ break;
+ case CLOSE:
+ if (cons)
+ v = ao_lisp_cons_poly(read_cons);
+ else
+ v = AO_LISP_NIL;
+ if (--cons) {
+ read_cons = ao_lisp_poly_cons(read_stack->car);
+ read_stack = read_stack->cdr;
+ for (read_cons_tail = read_cons;
+ read_cons_tail && read_cons_tail->cdr;
+ read_cons_tail = read_cons_tail->cdr)
+ ;
+ }
+ break;
+ }
+
+ if (!cons)
+ break;
+
+ struct ao_lisp_cons *read = ao_lisp_cons(v, NULL);
+ if (read_cons_tail)
+ read_cons_tail->cdr = read;
+ else
+ read_cons = read;
+ read_cons_tail = read;
+
+ parse_token = lex();
+ }
+ return v;
+}
+
+ao_lisp_poly
+ao_lisp_read(void)
+{
+ parse_token = lex();
+ return read_item();
+}
--- /dev/null
+/*
+ * 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef _AO_LISP_READ_H_
+#define _AO_LISP_READ_H_
+
+# define END 0
+# define NAME 1
+# define OPEN 2
+# define CLOSE 3
+# define QUOTE 4
+# define STRING 5
+# define NUM 6
+
+/*
+ * character classes
+ */
+
+# define PRINTABLE 0x00000001 /* \t \n ' ' - '~' */
+# define QUOTED 0x00000002 /* \ anything */
+# define BRA 0x00000004 /* ( [ { */
+# define KET 0x00000008 /* ) ] } */
+# define WHITE 0x00000010 /* ' ' \t \n */
+# define DIGIT 0x00000020 /* [0-9] */
+# define SIGN 0x00000040 /* +- */
+# define ENDOFFILE 0x00000080 /* end of file */
+# define COMMENT 0x00000100 /* ; # */
+# define IGNORE 0x00000200 /* \0 - ' ' */
+# define QUOTEC 0x00000400 /* ' */
+# define BACKSLASH 0x00000800 /* \ */
+# define VBAR 0x00001000 /* | */
+# define TWIDDLE 0x00002000 /* ~ */
+# define STRINGC 0x00004000 /* " */
+
+# define NOTNAME (STRINGC|TWIDDLE|VBAR|QUOTEC|COMMENT|ENDOFFILE|WHITE|KET|BRA)
+# define NUMBER (DIGIT|SIGN)
+
+#endif /* _AO_LISP_READ_H_ */
return a;
}
+char *
+ao_lisp_string_copy(char *a)
+{
+ int alen = strlen(a);
+
+ char *r = ao_lisp_alloc(alen + 1);
+ if (!r)
+ return NULL;
+ strcpy(r, a);
+ return r;
+}
+
char *
ao_lisp_string_cat(char *a, char *b)
{
cc $(CFLAGS) -o $@ ao_quaternion_test.c -lm
-AO_LISP_OBJS = ao_lisp_test.o ao_lisp_mem.o ao_lisp_lex.o ao_lisp_cons.o ao_lisp_string.o ao_lisp_atom.o ao_lisp_int.o ao_lisp_prim.o ao_lisp_eval.o ao_lisp_poly.o ao_lisp_builtin.o
+AO_LISP_OBJS = ao_lisp_test.o ao_lisp_mem.o ao_lisp_lex.o ao_lisp_cons.o ao_lisp_string.o ao_lisp_atom.o ao_lisp_int.o ao_lisp_prim.o ao_lisp_eval.o ao_lisp_poly.o ao_lisp_builtin.o ao_lisp_read.o
ao_lisp_test: $(AO_LISP_OBJS)
cc $(CFLAGS) -o $@ $(AO_LISP_OBJS)
{
int i, j;
struct ao_lisp_atom *atom;
+ ao_lisp_poly poly;
ao_lisp_root_add(&ao_lisp_cons_type, (void **) &list);
ao_lisp_root_add(&ao_lisp_string_type, (void **) &string);
printf ("\n");
ao_lisp_poly_print(ao_lisp_eval(ao_lisp_cons_poly(list)));
printf ("\n");
+
+ while ((poly = ao_lisp_read())) {
+ poly = ao_lisp_eval(poly);
+ ao_lisp_poly_print(poly);
+ putchar ('\n');
+ fflush(stdout);
+ }
+
}
projects / fw / altos / commitdiff