minischeme: add char
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4
Makefile
4
Makefile
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@ -2,7 +2,7 @@
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miniscm-run-tests: miniscm/scm tests.scm
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./miniscm/scm < tests.scm
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miniscm/scm:
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c89 -DSYSV -DInitFile=\"miniscm/init.scm\" miniscm/miniscm.c -o miniscm/scm
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miniscm/scm: miniscm/miniscm.c
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c89 -g -DSYSV -DInitFile=\"miniscm/init.scm\" miniscm/miniscm.c -o miniscm/scm
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clean:
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rm -f miniscm
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@ -17,6 +17,8 @@ designed to be used by a severely limited Scheme interpreter, which
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* lacks ``call/cc``, ``call-with-values``, etc
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* lacks user definable macros
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* only uses required features from R3RS
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(except ``open-input-port``, ``close-input-port``, ``read-char``,
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``open-output-port``, ``close-output-port``, ``write-char``)
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* has fixnums only
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* minimizes the use of strings
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* does not use "load" recursively
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@ -73,6 +73,3 @@
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(equal? (cdr x) (cdr y)))
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(and (not (pair? y))
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(eqv? x y))))
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(display "This is a limited version of MiniScheme used to run UNSLISP.")
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@ -25,6 +25,13 @@
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*--
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*/
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/* TODO: Add basic port operations.
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*
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* UNSLISP only needs one input port and one output port (besides stdin
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* and stdout). The easiest thing to do is to make ports integers that
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* reference a global list of FILE*.
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*/
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/*
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* Here is System declaration.
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* Please define exactly one symbol in the following section.
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@ -66,14 +73,17 @@
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* Define or undefine following symbols as you need.
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*/
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/* #define VERBOSE */ /* define this if you want verbose GC */
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#define VERBOSE
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#define AVOID_HACK_LOOP /* define this if your compiler is poor
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* enougth to complain "do { } while (0)"
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* construction.
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*/
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#if 0
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#define USE_SETJMP /* undef this if you do not want to use setjmp() */
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#define USE_QQUOTE /* undef this if you do not need quasiquote */
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#define USE_MACRO /* undef this if you do not need macro */
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#endif
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#ifdef USE_QQUOTE
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/*--
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@ -102,7 +112,7 @@
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#define banner "Hello, This is Mini-Scheme Interpreter Version 0.85k4-a.\n"
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#define banner "Hello, This is Mini-Scheme Interpreter Version 0.85k4-a for UNSLISP.\n"
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#include <stdio.h>
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@ -224,6 +234,7 @@ typedef struct cell *pointer;
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# define T_MACRO 256 /* 0000000100000000 */
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#endif
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#define T_PROMISE 512 /* 0000001000000000 */
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#define T_CHAR 1024 /* 0000010000000000 */
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#define T_ATOM 16384 /* 0100000000000000 */ /* only for gc */
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#define CLRATOM 49151 /* 1011111111111111 */ /* only for gc */
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#define MARK 32768 /* 1000000000000000 */
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@ -238,6 +249,7 @@ typedef struct cell *pointer;
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#define isnumber(p) (type(p)&T_NUMBER)
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#define ivalue(p) ((p)->_object._number._ivalue)
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#define ischar(p) (type(p)&T_CHAR)
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#define ispair(p) (type(p)&T_PAIR)
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#define car(p) ((p)->_object._cons._car)
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@ -329,6 +341,18 @@ jmp_buf error_jmp;
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#endif
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char gc_verbose; /* if gc_verbose is not zero, print gc status */
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stricmp(x, y)
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char *x;
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char *y;
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{
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for (; tolower((unsigned char)(*x++))
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== tolower((unsigned char)(*y++));
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x++, y++)
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if (!*x)
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break;
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return *x - *y;
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}
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/* allocate new cell segment */
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alloc_cellseg(n)
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int n;
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@ -526,6 +550,24 @@ char *q;
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return (mk_number(atol(q)));
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}
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/* make char */
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pointer mk_char(name)
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char *name;
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{
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register pointer x = get_cell(NIL, NIL);
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type(x) = (T_CHAR | T_ATOM);
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if (stricmp(name, "space") == 0) {
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ivalue(x) = ' ';
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} else if (stricmp(name, "newline") == 0) {
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ivalue(x) = '\n';
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} else {
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ivalue(x) = *name;
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}
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return x;
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}
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/* make constant */
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pointer mk_const(name)
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char *name;
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@ -548,9 +590,12 @@ char *name;
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sprintf(tmp, "0x%s", &name[1]);
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sscanf(tmp, "%lx", &x);
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return (mk_number(x));
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} else
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} else if (*name == '\\') { /* Character constant */
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return (mk_char(&name[1]));
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} else {
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return (NIL);
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}
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}
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/* ========== garbage collector ========== */
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@ -858,6 +903,16 @@ int f;
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p = "#<CLOSURE>";
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else if (iscontinuation(l))
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p = "#<CONTINUATION>";
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else if (ischar(l)) {
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if (ivalue(l) == '\n')
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p = "#\\newline";
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else if (ivalue(l) == ' ')
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p = "#\\space";
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else {
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p = strbuff;
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sprintf(p, "#\\%c", ivalue(l));
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}
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}
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if (f < 0)
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return strlen(p);
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fputs(p, outfp);
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@ -948,6 +1003,11 @@ register pointer a, b;
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return (ivalue(a) == ivalue(b));
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else
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return (0);
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} else if (ischar(a)) {
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if (ischar(b))
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return (ivalue(a) == ivalue(b));
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else
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return (0);
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} else
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return (a == b);
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}
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@ -1115,7 +1175,7 @@ register pointer a, b;
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#define OP_GET_CLOSURE 101
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#define OP_CLOSUREP 102
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#define OP_MACROP 103
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#define OP_CHAR 104
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static FILE *tmpfp;
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static int tok;
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@ -1716,6 +1776,8 @@ register short op;
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s_retbool(issymbol(car(args)));
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case OP_NUMBER: /* number? */
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s_retbool(isnumber(car(args)));
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case OP_CHAR: /* char? */
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s_retbool(ischar(car(args)));
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case OP_STRING: /* string? */
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s_retbool(isstring(car(args)));
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case OP_PROC: /* procedure? */
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@ -1958,6 +2020,7 @@ register short op;
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fprintf(outfp, "'");
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args = cadr(args);
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s_goto(OP_P0LIST);
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#ifdef USE_QQUOTE
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} else if (car(args) == QQUOTE && ok_abbrev(cdr(args))) {
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fprintf(outfp, "`");
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args = cadr(args);
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@ -1970,6 +2033,7 @@ register short op;
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fprintf(outfp, ",@");
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args = cadr(args);
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s_goto(OP_P0LIST);
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#endif
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} else {
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fprintf(outfp, "(");
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s_save(OP_P1LIST, cdr(args), NIL);
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@ -2045,6 +2109,7 @@ register short op;
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++w;
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args = cadr(args);
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s_goto(OP_P0_WIDTH);
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#ifdef USE_QQUOTE
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} else if (car(args) == QQUOTE
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&& ok_abbrev(cdr(args))) {
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++w;
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@ -2060,6 +2125,7 @@ register short op;
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w += 2;
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args = cadr(args);
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s_goto(OP_P0_WIDTH);
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#endif
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} else {
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++w;
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s_save(OP_P1_WIDTH, cdr(args), NIL);
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@ -2231,10 +2297,11 @@ pointer (*dispatch_table[])() = {
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opexe_6, /* OP_P1_WIDTH, */
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opexe_6, /* OP_GET_CLOSURE, */
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opexe_6, /* OP_CLOSUREP, */
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#ifdef USE_MACRO
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/* OP_MACROP is kept in to fill in a slot. Will return illegal
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* operator when macros are disabled. */
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opexe_6, /* OP_MACROP, */
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#endif
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opexe_3 /* OP_CHAR */
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};
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@ -2382,6 +2449,7 @@ init_procs()
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mk_proc(OP_MACROP, "macro?"); /* a.k */
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#endif
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mk_proc(OP_QUIT, "quit");
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mk_proc(OP_CHAR, "char?");
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}
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