mes.c: display, newline: take optional port; add write-char, read hex #xXX.
This commit is contained in:
Jan Nieuwenhuizen
parent
066deeb183
commit
2097e9e4ef
122
mes.c
122
mes.c
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@ -69,7 +69,7 @@ typedef struct scm_t {
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#define MES_C 1
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#include "mes.h"
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scm *display_helper (scm*, bool, char*, bool);
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scm *display_helper (FILE*, scm*, bool, char*, bool);
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bool
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symbol_eq (scm *x, char *s)
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{
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@ -515,9 +515,20 @@ vector_p (scm *x)
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}
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scm *
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display (scm *x)
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display (scm *x/*...*/)
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{
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return display_helper (x, false, "", false);
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scm *e = car (x);
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scm *p = cdr (x);
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int fd = 1;
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if (p->type == PAIR && p->car->type == NUMBER) fd = p->car->value;
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FILE *f = fd == 1 ? stdout : stderr;
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return display_helper (f, e, false, "", false);
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}
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scm *
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display_ (FILE* f, scm *x) //internal
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{
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return display_helper (f, x, false, "", false);
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}
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scm *
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@ -909,66 +920,69 @@ vector_to_list (scm *v)
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}
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scm *
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newline ()
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newline (scm *p/*...*/)
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{
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puts ("");
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int fd = 1;
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if (p->type == PAIR && p->car->type == NUMBER) fd = p->car->value;
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FILE *f = fd == 1 ? stdout : stderr;
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fputs ("\n", f);
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return &scm_unspecified;
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}
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scm *
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display_helper (scm *x, bool cont, char *sep, bool quote)
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display_helper (FILE* f, scm *x, bool cont, char *sep, bool quote)
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{
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scm *r;
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printf ("%s", sep);
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if (x->type == CHAR && x->value == char_nul.value) printf ("#\\%s", char_nul.name);
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else if (x->type == CHAR && x->value == char_backspace.value) printf ("#\\%s", char_backspace.name);
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else if (x->type == CHAR && x->value == char_tab.value) printf ("#\\%s", char_tab.name);
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else if (x->type == CHAR && x->value == char_newline.value) printf ("#\\%s", char_newline.name);
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else if (x->type == CHAR && x->value == char_vt.value) printf ("#\\%s", char_vt.name);
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else if (x->type == CHAR && x->value == char_page.value) printf ("#\\%s", char_page.name);
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else if (x->type == CHAR && x->value == char_return.value) printf ("#\\%s", char_return.name);
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else if (x->type == CHAR && x->value == char_space.value) printf ("#\\%s", char_space.name);
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else if (x->type == CHAR) printf ("#\\%c", x->value);
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fprintf (f, "%s", sep);
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if (x->type == CHAR && x->value == char_nul.value) fprintf (f, "#\\%s", char_nul.name);
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else if (x->type == CHAR && x->value == char_backspace.value) fprintf (f, "#\\%s", char_backspace.name);
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else if (x->type == CHAR && x->value == char_tab.value) fprintf (f, "#\\%s", char_tab.name);
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else if (x->type == CHAR && x->value == char_newline.value) fprintf (f, "#\\%s", char_newline.name);
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else if (x->type == CHAR && x->value == char_vt.value) fprintf (f, "#\\%s", char_vt.name);
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else if (x->type == CHAR && x->value == char_page.value) fprintf (f, "#\\%s", char_page.name);
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else if (x->type == CHAR && x->value == char_return.value) fprintf (f, "#\\%s", char_return.name);
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else if (x->type == CHAR && x->value == char_space.value) fprintf (f, "#\\%s", char_space.name);
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else if (x->type == CHAR) fprintf (f, "#\\%c", x->value);
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else if (x->type == MACRO) {
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printf ("(*macro* ");
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display_helper (x->macro, cont, sep, quote);
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printf (")");
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fprintf (f, "(*macro* ");
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display_helper (f, x->macro, cont, sep, quote);
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fprintf (f, ")");
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}
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else if (x->type == NUMBER) printf ("%d", x->value);
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else if (x->type == NUMBER) fprintf (f, "%d", x->value);
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else if (x->type == PAIR) {
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if (car (x) == &symbol_circ) {
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printf ("(*circ* . #-1#)");
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fprintf (f, "(*circ* . #-1#)");
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return &scm_unspecified;
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}
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if (car (x) == &symbol_closure) {
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printf ("(*closure* . #-1#)");
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fprintf (f, "(*closure* . #-1#)");
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return &scm_unspecified;
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}
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if (car (x) == &scm_quote) {
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printf ("'");
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return display_helper (car (cdr (x)), cont, "", true);
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fprintf (f, "'");
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return display_helper (f, car (cdr (x)), cont, "", true);
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}
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if (!cont) printf ("(");
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display (car (x));
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if (!cont) fprintf (f, "(");
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display_ (f, car (x));
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if (cdr (x)->type == PAIR)
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display_helper (cdr (x), true, " ", false);
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display_helper (f, cdr (x), true, " ", false);
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else if (cdr (x) != &scm_nil) {
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printf (" . ");
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display (cdr (x));
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fprintf (f, " . ");
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display_ (f, cdr (x));
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}
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if (!cont) printf (")");
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if (!cont) fprintf (f, ")");
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}
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else if (x->type == VECTOR) {
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printf ("#(", x->length);
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fprintf (f, "#(", x->length);
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for (int i = 0; i < x->length; i++) {
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if (x->vector[i]->type == VECTOR)
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printf ("%s#(...)", i ? " " : "");
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fprintf (f, "%s#(...)", i ? " " : "");
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else
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display_helper (x->vector[i], false, i ? " " : "", false);
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display_helper (f, x->vector[i], false, i ? " " : "", false);
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}
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printf (")");
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fprintf (f, ")");
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}
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else if (atom_p (x) == &scm_t) printf ("%s", x->name);
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else if (atom_p (x) == &scm_t) fprintf (f, "%s", x->name);
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return &scm_unspecified;
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}
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@ -1001,10 +1015,23 @@ read_char ()
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return make_char (getchar ());
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}
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scm *
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write_char (scm *x/*...*/)
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{
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scm *c = car (x);
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scm *p = cdr (x);
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int fd = 1;
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if (p->type == PAIR && p->car->type == NUMBER) fd = p->car->value;
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FILE *f = fd == 1 ? stdout : stderr;
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assert (c->type == NUMBER || c->type == CHAR);
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fputc (c->value, f);
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return c;
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}
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scm*
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builtin_ungetchar (scm *c)
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{
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assert (c->type == NUMBER);
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assert (c->type == NUMBER || c->type == CHAR);
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ungetchar (c->value);
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return c;
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}
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@ -1060,6 +1087,7 @@ readword (int c, char* w, scm *a)
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cons (readword (getchar (), w, a),
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&scm_nil));}
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if (c == ';') {readcomment (c); return readword ('\n', w, a);}
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if (c == '#' && peek_char () == 'x') {getchar (); return read_hex ();}
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if (c == '#' && peek_char () == '\\') {getchar (); return read_character ();}
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if (c == '#' && !w && peek_char () == '(') {getchar (); return list_to_vector (readlist (a));}
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if (c == '#' && peek_char () == '(') {ungetchar (c); return lookup (w, a);}
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@ -1069,6 +1097,24 @@ readword (int c, char* w, scm *a)
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return readword (getchar (), strncat (w ? w : buf, &ch, 1), a);
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}
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scm *
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read_hex ()
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{
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int n = 0;
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int c = peek_char ();
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while ((c >= '0' && c <= '9')
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|| (c >= 'A' && c <= 'F')
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|| (c >= 'a' && c <= 'f')) {
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n <<= 4;
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if (c >= 'a') n += c - 'a' + 10;
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else if (c >= 'A') n += c - 'A' + 10;
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else n+= c - '0';
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getchar ();
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c = peek_char ();
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}
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return make_number (n);
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}
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scm *
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read_character ()
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{
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@ -1370,7 +1416,7 @@ int
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main (int argc, char *argv[])
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{
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scm *a = mes_environment ();
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display (eval (cons (&symbol_begin, read_file (readenv (a), a)), a));
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newline ();
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display_ (stderr, eval (cons (&symbol_begin, read_file (readenv (a), a)), a));
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fputs ("", stderr);
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return 0;
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}
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