diff --git a/femtolisp/LICENSE b/femtolisp/LICENSE new file mode 100644 index 0000000..f68dd36 --- /dev/null +++ b/femtolisp/LICENSE @@ -0,0 +1,214 @@ +Common Public License Version 1.0 +Fri, 2007-06-01 17:16 — nelson + +THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS COMMON PUBLIC +LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM +CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT. + +1. DEFINITIONS + +"Contribution" means: + +a) in the case of the initial Contributor, the initial code and +documentation distributed under this Agreement, and + +b) in the case of each subsequent Contributor: + +i) changes to the Program, and + +ii) additions to the Program; + +where such changes and/or additions to the Program originate from and are +distributed by that particular Contributor. A Contribution 'originates' from a +Contributor if it was added to the Program by such Contributor itself or anyone +acting on such Contributor's behalf. 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Each party waives its rights to a jury trial in +any resulting litigation. diff --git a/femtolisp/cvalues.c b/femtolisp/cvalues.c index 332d849..a83ca70 100644 --- a/femtolisp/cvalues.c +++ b/femtolisp/cvalues.c @@ -130,7 +130,7 @@ value_t cvalue_from_data(value_t type, void *data, size_t sz) // ptr is user-managed; we don't autorelease it unless the // user explicitly calls (autorelease ) on the result of this function. // 'parent' is an optional cvalue that this pointer is known to point -// into; UNBOUND if none. +// into; NIL if none. value_t cvalue_from_ref(value_t type, void *ptr, size_t sz, value_t parent) { cvalue_t *pcv; @@ -146,7 +146,7 @@ value_t cvalue_from_ref(value_t type, void *ptr, size_t sz, value_t parent) pcv->deps = NIL; pcv->type = POP(); parent = POP(); - if (parent != UNBOUND) { + if (parent != NIL) { // TODO: add dependency } cv = tagptr(pcv, TAG_BUILTIN); @@ -178,7 +178,7 @@ value_t cvalue_string(size_t sz) value_t cvalue_pinned_cstring(char *str) { value_t v = cvalue_from_ref(symbol_value(stringtypesym), str, strlen(str), - UNBOUND); + NIL); ((cvalue_t*)ptr(v))->flags.cstring = 1; return v; } diff --git a/femtolisp/flisp.c b/femtolisp/flisp.c index 9eabe18..4900ee0 100644 --- a/femtolisp/flisp.c +++ b/femtolisp/flisp.c @@ -20,17 +20,6 @@ * read macros for backquote * symbol character-escaping printer - * new print algorithm - 1. traverse & tag all conses to be printed. when you encounter a cons - that is already tagged, add it to a table to give it a #n# index - 2. untag a cons when printing it. if cons is in the table, print - "#n=" before it in the car, " . #n=" in the cdr. if cons is in the - table but already untagged, print #n# in car or " . #n#" in the cdr. - * read macros for #n# and #n= using the same kind of table - * also need a table of read labels to translate from input indexes to - normalized indexes (0 for first label, 1 for next, etc.) - * read macro #. for eval-when-read. use for printing builtins, e.g. "#.eq" - The value of this extra complexity, and what makes this fork worthy of the femtoLisp brand, is that the interpreter is fully "closed" in the sense that all representable values can be read and printed. @@ -48,8 +37,8 @@ * strings - hash tables - by Jeff Bezanson - Public Domain + by Jeff Bezanson (C) 2008 + Distributed under the Common Public License v1.0 */ #include @@ -76,7 +65,8 @@ static char *builtin_names[] = "cons", "car", "cdr", "rplaca", "rplacd", "eval", "apply", "set", "prog1", "raise", "+", "-", "*", "/", "<", "~", "&", "!", "$", - "vector", "aref", "aset", "length", "assoc", "compare" }; + "vector", "aref", "aset", "length", "assoc", "compare", + "for" }; static char *stack_bottom; #define PROCESS_STACK_SIZE (2*1024*1024) @@ -651,7 +641,7 @@ static value_t eval_sexpr(value_t e, uint32_t penv, int tail) symbol_t *sym; uint32_t saveSP, envsz, lenv; int i, nargs, noeval=0; - fixnum_t s; + fixnum_t s, lo, hi; cvalue_t *cv; int64_t accum; @@ -1144,12 +1134,34 @@ static value_t eval_sexpr(value_t e, uint32_t penv, int tail) argcount("assoc", nargs, 2); v = assoc(Stack[SP-2], Stack[SP-1]); break; + case F_FOR: + argcount("for", nargs, 3); + lo = tofixnum(Stack[SP-3], "for"); + hi = tofixnum(Stack[SP-2], "for"); + f = Stack[SP-1]; + v = car(cdr(f)); + if (!iscons(v) || !iscons(cdr_(cdr_(f))) || + cdr_(v) != NIL) + lerror(ArgError, "for: expected 1 argument lambda"); + f = cdr_(f); + PUSH(f); // save function cdr + SP += 4; // make space + Stack[SP-4] = fixnum(3); // env size + Stack[SP-1] = cdr_(cdr_(f)); // cloenv + for(s=lo; s <= hi; s++) { + f = Stack[SP-5]; + Stack[SP-3] = car_(f); // lambda list + Stack[SP-2] = fixnum(s); // argument value + v = eval_sexpr(car_(cdr_(f)), SP-3, 0); + } + break; case F_SPECIAL_APPLY: v = Stack[saveSP-4]; f = Stack[saveSP-5]; PUSH(f); PUSH(v); nargs = 2; + // falls through!! case F_APPLY: argcount("apply", nargs, 2); v = Stack[saveSP] = Stack[SP-1]; // second arg is new arglist diff --git a/femtolisp/flisp.h b/femtolisp/flisp.h index 038f272..9180c6a 100644 --- a/femtolisp/flisp.h +++ b/femtolisp/flisp.h @@ -86,7 +86,7 @@ enum { F_CONS, F_CAR, F_CDR, F_RPLACA, F_RPLACD, F_EVAL, F_APPLY, F_SET, F_PROG1, F_RAISE, F_ADD, F_SUB, F_MUL, F_DIV, F_LT, F_BNOT, F_BAND, F_BOR, F_BXOR, - F_VECTOR, F_AREF, F_ASET, F_LENGTH, F_ASSOC, F_COMPARE, + F_VECTOR, F_AREF, F_ASET, F_LENGTH, F_ASSOC, F_COMPARE, F_FOR, N_BUILTINS }; #define isspecial(v) (uintval(v) <= (unsigned int)F_PROGN) diff --git a/femtolisp/system.lsp b/femtolisp/system.lsp index f7a5e05..ef7c2d9 100644 --- a/femtolisp/system.lsp +++ b/femtolisp/system.lsp @@ -1,6 +1,6 @@ ; femtoLisp standard library -; by Jeff Bezanson -; Public Domain +; by Jeff Bezanson (C) 2008 +; Distributed under the Common Public License v1.0 (set 'list (lambda args args)) @@ -269,22 +269,23 @@ (defmacro dotimes (var . body) (let ((v (car var)) - (cnt (cadr var))) - (list 'let (list (list v 0)) - (list 'while (list < v cnt) - (list prog1 (f-body body) (list 'setq v (list + v 1))))))) + (cnt (cadr var)) + (lim (gensym))) + `(let ((,lim (- ,cnt 1))) + (for 0 ,lim + (lambda (,v) ,(f-body body)))))) (defun map-int (f n) (if (<= n 0) () - (let ((first (cons (f 0) nil))) - ((label map-int- - (lambda (acc i n) - (if (= i n) - first - (progn (rplacd acc (cons (f i) nil)) - (map-int- (cdr acc) (+ i 1) n))))) - first 1 n)))) + (let ((first (cons (f 0) nil)) + (acc nil)) + (setq acc first) + (for 1 (- n 1) + (lambda (i) + (progn (rplacd acc (cons (f i) nil)) + (setq acc (cdr acc))))) + first))) (defun iota (n) (map-int identity n)) @@ -403,11 +404,11 @@ (defun list-to-vector (l) (apply vector l)) (defun vector-to-list (v) - (let ((i (- (length v) 1)) + (let ((n (length v)) (l nil)) - (while (>= i 0) - (setq l (cons (aref v i) l)) - (setq i (- i 1))) + (for 1 n + (lambda (i) + (setq l (cons (aref v (- n i)) l)))) l)) (defun self-evaluating-p (x) diff --git a/femtolisp/test.lsp b/femtolisp/test.lsp index 61d98c5..d18d753 100644 --- a/femtolisp/test.lsp +++ b/femtolisp/test.lsp @@ -57,6 +57,18 @@ ,(f-body body) (setq ,v (+ ,v 1))))))) +(defun map-int (f n) + (if (<= n 0) + () + (let ((first (cons (f 0) nil))) + ((label map-int- + (lambda (acc i n) + (if (= i n) + first + (progn (rplacd acc (cons (f i) nil)) + (map-int- (cdr acc) (+ i 1) n))))) + first 1 n)))) + (defmacro labl (name fn) `((lambda (,name) (setq ,name ,fn)) nil)) diff --git a/femtolisp/todo b/femtolisp/todo index d0adae1..6707ecc 100644 --- a/femtolisp/todo +++ b/femtolisp/todo @@ -122,6 +122,7 @@ for internal use: and a more efficient apply() entry point . disadvantage is looking through the lambda list on every lookup. maybe improve by making lambda lists vectors somehow? +* fast builtin bounded iteration construct (for lo hi (lambda (x) ...)) bugs: * with the fully recursive (simpler) relocate(), the size of cons chains @@ -830,6 +831,19 @@ IOStream API *rand.uint64 *rand.double +----------------------------------------------------------------------------- + + * new print algorithm + 1. traverse & tag all conses to be printed. when you encounter a cons + that is already tagged, add it to a table to give it a #n# index + 2. untag a cons when printing it. if cons is in the table, print + "#n=" before it in the car, " . #n=" in the cdr. if cons is in the + table but already untagged, print #n# in car or " . #n#" in the cdr. + * read macros for #n# and #n= using the same kind of table + * also need a table of read labels to translate from input indexes to + normalized indexes (0 for first label, 1 for next, etc.) + * read macro #. for eval-when-read. use for printing builtins, e.g. "#.eq" + ----------------------------------------------------------------------------- prettyprint notes