774 lines
22 KiB
C
774 lines
22 KiB
C
extern void *memrchr(const void *s, int c, size_t n);
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static htable_t printconses;
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static u_int32_t printlabel;
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static int print_pretty;
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static int print_princ;
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static fixnum_t print_length;
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static fixnum_t print_level;
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static fixnum_t P_LEVEL;
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static int SCR_WIDTH = 80;
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static int HPOS=0, VPOS;
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static void outc(char c, ios_t *f)
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{
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ios_putc(c, f);
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if (c == '\n')
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HPOS = 0;
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else
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HPOS++;
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}
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static void outs(char *s, ios_t *f)
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{
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ios_puts(s, f);
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HPOS += u8_strwidth(s);
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}
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static void outsn(char *s, ios_t *f, size_t n)
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{
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ios_write(f, s, n);
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HPOS += u8_strwidth(s);
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}
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static int outindent(int n, ios_t *f)
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{
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// move back to left margin if we get too indented
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if (n > SCR_WIDTH-12)
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n = 2;
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int n0 = n;
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ios_putc('\n', f);
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VPOS++;
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HPOS = n;
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while (n >= 8) {
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ios_putc('\t', f);
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n -= 8;
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}
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while (n) {
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ios_putc(' ', f);
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n--;
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}
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return n0;
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}
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void fl_print_chr(char c, ios_t *f)
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{
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outc(c, f);
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}
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void fl_print_str(char *s, ios_t *f)
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{
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outs(s, f);
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}
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void print_traverse(value_t v)
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{
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value_t *bp;
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while (iscons(v)) {
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if (ismarked(v)) {
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bp = (value_t*)ptrhash_bp(&printconses, (void*)v);
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if (*bp == (value_t)HT_NOTFOUND)
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*bp = fixnum(printlabel++);
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return;
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}
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mark_cons(v);
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print_traverse(car_(v));
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v = cdr_(v);
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}
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if (!ismanaged(v) || issymbol(v))
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return;
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if (ismarked(v)) {
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bp = (value_t*)ptrhash_bp(&printconses, (void*)v);
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if (*bp == (value_t)HT_NOTFOUND)
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*bp = fixnum(printlabel++);
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return;
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}
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if (isvector(v)) {
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if (vector_size(v) > 0)
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mark_cons(v);
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unsigned int i;
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for(i=0; i < vector_size(v); i++)
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print_traverse(vector_elt(v,i));
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}
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else if (iscprim(v)) {
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mark_cons(v);
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}
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else if (isclosure(v)) {
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mark_cons(v);
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function_t *f = (function_t*)ptr(v);
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print_traverse(f->bcode);
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print_traverse(f->vals);
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print_traverse(f->env);
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}
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else {
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assert(iscvalue(v));
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cvalue_t *cv = (cvalue_t*)ptr(v);
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// don't consider shared references to ""
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if (!cv_isstr(cv) || cv_len(cv)!=0)
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mark_cons(v);
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fltype_t *t = cv_class(cv);
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if (t->vtable != NULL && t->vtable->print_traverse != NULL)
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t->vtable->print_traverse(v);
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}
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}
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static void print_symbol_name(ios_t *f, char *name)
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{
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int i, escape=0, charescape=0;
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if ((name[0] == '\0') ||
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(name[0] == '.' && name[1] == '\0') ||
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(name[0] == '#') ||
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isnumtok(name, NULL))
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escape = 1;
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i=0;
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while (name[i]) {
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if (!symchar(name[i])) {
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escape = 1;
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if (name[i]=='|' || name[i]=='\\') {
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charescape = 1;
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break;
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}
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}
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i++;
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}
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if (escape) {
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if (charescape) {
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outc('|', f);
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i=0;
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while (name[i]) {
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if (name[i]=='|' || name[i]=='\\')
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outc('\\', f);
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outc(name[i], f);
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i++;
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}
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outc('|', f);
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}
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else {
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outc('|', f);
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outs(name, f);
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outc('|', f);
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}
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}
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else {
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outs(name, f);
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}
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}
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/*
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The following implements a simple pretty-printing algorithm. This is
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an unlimited-width approach that doesn't require an extra pass.
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It uses some heuristics to guess whether an expression is "small",
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and avoids wrapping symbols across lines. The result is high
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performance and nice output for typical code. Quality is poor for
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pathological or deeply-nested expressions, but those are difficult
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to print anyway.
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*/
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#define SMALL_STR_LEN 20
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static inline int tinyp(value_t v)
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{
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if (issymbol(v))
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return (u8_strwidth(symbol_name(v)) < SMALL_STR_LEN);
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if (fl_isstring(v))
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return (cv_len((cvalue_t*)ptr(v)) < SMALL_STR_LEN);
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return (isfixnum(v) || isbuiltin(v) || v==FL_F || v==FL_T || v==FL_NIL ||
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v == FL_EOF);
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}
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static int smallp(value_t v)
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{
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if (tinyp(v)) return 1;
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if (fl_isnumber(v)) return 1;
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if (iscons(v)) {
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if (tinyp(car_(v)) && (tinyp(cdr_(v)) ||
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(iscons(cdr_(v)) && tinyp(car_(cdr_(v))) &&
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cdr_(cdr_(v))==NIL)))
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return 1;
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return 0;
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}
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if (isvector(v)) {
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size_t s = vector_size(v);
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return (s == 0 || (tinyp(vector_elt(v,0)) &&
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(s == 1 || (s == 2 &&
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tinyp(vector_elt(v,1))))));
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}
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return 0;
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}
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static int specialindent(value_t head)
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{
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// indent these forms 2 spaces, not lined up with the first argument
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if (head == LAMBDA || head == TRYCATCH || head == definesym ||
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head == defmacrosym || head == forsym)
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return 2;
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return -1;
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}
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static int lengthestimate(value_t v)
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{
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// get the width of an expression if we can do so cheaply
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if (issymbol(v))
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return u8_strwidth(symbol_name(v));
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return -1;
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}
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static int allsmallp(value_t v)
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{
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int n = 1;
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while (iscons(v)) {
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if (!smallp(car_(v)))
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return 0;
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v = cdr_(v);
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n++;
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if (n > 25)
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return n;
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}
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return n;
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}
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static int indentafter3(value_t head, value_t v)
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{
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// for certain X always indent (X a b c) after b
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return ((head == forsym) && !allsmallp(cdr_(v)));
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}
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static int indentafter2(value_t head, value_t v)
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{
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// for certain X always indent (X a b) after a
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return ((head == definesym || head == defmacrosym) &&
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!allsmallp(cdr_(v)));
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}
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static int indentevery(value_t v)
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{
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// indent before every subform of a special form, unless every
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// subform is "small"
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value_t c = car_(v);
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if (c == LAMBDA || c == setqsym)
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return 0;
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if (c == IF) // TODO: others
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return !allsmallp(cdr_(v));
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return 0;
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}
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static int blockindent(value_t v)
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{
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// in this case we switch to block indent mode, where the head
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// is no longer considered special:
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// (a b c d e
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// f g h i j)
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return (allsmallp(v) > 9);
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}
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static void print_pair(ios_t *f, value_t v)
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{
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value_t cd;
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char *op = NULL;
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if (iscons(cdr_(v)) && cdr_(cdr_(v)) == NIL &&
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!ptrhash_has(&printconses, (void*)cdr_(v)) &&
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(((car_(v) == QUOTE) && (op = "'")) ||
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((car_(v) == BACKQUOTE) && (op = "`")) ||
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((car_(v) == COMMA) && (op = ",")) ||
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((car_(v) == COMMAAT) && (op = ",@")) ||
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((car_(v) == COMMADOT) && (op = ",.")))) {
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// special prefix syntax
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unmark_cons(v);
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unmark_cons(cdr_(v));
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outs(op, f);
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fl_print_child(f, car_(cdr_(v)));
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return;
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}
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int startpos = HPOS;
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outc('(', f);
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int newindent=HPOS, blk=blockindent(v);
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int lastv, n=0, si, ind=0, est, always=0, nextsmall, thistiny;
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if (!blk) always = indentevery(v);
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value_t head = car_(v);
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int after3 = indentafter3(head, v);
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int after2 = indentafter2(head, v);
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int n_unindented = 1;
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while (1) {
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cd = cdr_(v);
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if (print_length >= 0 && n >= print_length && cd!=NIL) {
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outsn("...)", f, 4);
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break;
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}
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lastv = VPOS;
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unmark_cons(v);
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fl_print_child(f, car_(v));
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if (!iscons(cd) || ptrhash_has(&printconses, (void*)cd)) {
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if (cd != NIL) {
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outsn(" . ", f, 3);
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fl_print_child(f, cd);
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}
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outc(')', f);
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break;
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}
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if (!print_pretty ||
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((head == LAMBDA) && n == 0)) {
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// never break line before lambda-list
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ind = 0;
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}
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else {
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est = lengthestimate(car_(cd));
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nextsmall = smallp(car_(cd));
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thistiny = tinyp(car_(v));
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ind = (((VPOS > lastv) ||
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(HPOS>SCR_WIDTH/2 && !nextsmall && !thistiny && n>0)) ||
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(HPOS > SCR_WIDTH-4) ||
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(est!=-1 && (HPOS+est > SCR_WIDTH-2)) ||
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((head == LAMBDA) && !nextsmall) ||
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(n > 0 && always) ||
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(n == 2 && after3) ||
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(n == 1 && after2) ||
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(n_unindented >= 3 && !nextsmall) ||
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(n == 0 && !smallp(head)));
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}
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if (ind) {
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newindent = outindent(newindent, f);
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n_unindented = 1;
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}
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else {
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n_unindented++;
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outc(' ', f);
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if (n==0) {
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// set indent level after printing head
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si = specialindent(head);
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if (si != -1)
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newindent = startpos + si;
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else if (!blk)
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newindent = HPOS;
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}
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}
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n++;
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v = cd;
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}
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}
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static void cvalue_print(ios_t *f, value_t v);
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static int print_circle_prefix(ios_t *f, value_t v)
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{
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value_t label;
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if ((label=(value_t)ptrhash_get(&printconses, (void*)v)) !=
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(value_t)HT_NOTFOUND) {
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if (!ismarked(v)) {
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HPOS+=ios_printf(f, "#%ld#", numval(label));
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return 1;
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}
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HPOS+=ios_printf(f, "#%ld=", numval(label));
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}
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if (ismanaged(v))
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unmark_cons(v);
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return 0;
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}
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void fl_print_child(ios_t *f, value_t v)
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{
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char *name;
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if (print_level >= 0 && P_LEVEL >= print_level &&
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(iscons(v) || isvector(v) || isclosure(v))) {
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outc('#', f);
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return;
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}
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P_LEVEL++;
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switch (tag(v)) {
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case TAG_NUM :
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case TAG_NUM1: HPOS+=ios_printf(f, "%ld", numval(v)); break;
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case TAG_SYM:
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name = symbol_name(v);
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if (print_princ)
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outs(name, f);
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else if (ismanaged(v)) {
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outsn("#:", f, 2);
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outs(name, f);
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}
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else
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print_symbol_name(f, name);
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break;
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case TAG_FUNCTION:
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if (v == FL_T) {
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outsn("#t", f, 2);
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}
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else if (v == FL_F) {
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outsn("#f", f, 2);
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}
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else if (v == FL_NIL) {
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outsn("()", f, 2);
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}
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else if (v == FL_EOF) {
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outsn("#<eof>", f, 6);
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}
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else if (isbuiltin(v)) {
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if (!print_princ)
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outsn("#.", f, 2);
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outs(builtin_names[uintval(v)], f);
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}
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else {
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assert(isclosure(v));
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if (!print_princ) {
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if (print_circle_prefix(f, v)) break;
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function_t *fn = (function_t*)ptr(v);
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outs("#fn(", f);
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char *data = cvalue_data(fn->bcode);
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size_t i, sz = cvalue_len(fn->bcode);
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for(i=0; i < sz; i++) data[i] += 48;
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fl_print_child(f, fn->bcode);
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for(i=0; i < sz; i++) data[i] -= 48;
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outc(' ', f);
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fl_print_child(f, fn->vals);
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if (fn->env != NIL) {
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outc(' ', f);
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fl_print_child(f, fn->env);
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}
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if (fn->name != LAMBDA) {
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outc(' ', f);
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fl_print_child(f, fn->name);
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}
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outc(')', f);
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}
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else {
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outs("#<function>", f);
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}
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}
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break;
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case TAG_CVALUE:
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case TAG_CPRIM:
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if (v == UNBOUND) { outs("#<undefined>", f); break; }
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case TAG_VECTOR:
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case TAG_CONS:
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if (print_circle_prefix(f, v)) break;
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if (isvector(v)) {
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outc('[', f);
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int newindent = HPOS, est;
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int i, sz = vector_size(v);
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for(i=0; i < sz; i++) {
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if (print_length >= 0 && i >= print_length && i < sz-1) {
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outsn("...", f, 3);
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break;
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}
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fl_print_child(f, vector_elt(v,i));
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if (i < sz-1) {
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if (!print_pretty) {
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outc(' ', f);
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}
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else {
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est = lengthestimate(vector_elt(v,i+1));
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if (HPOS > SCR_WIDTH-4 ||
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(est!=-1 && (HPOS+est > SCR_WIDTH-2)) ||
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(HPOS > SCR_WIDTH/2 &&
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!smallp(vector_elt(v,i+1)) &&
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!tinyp(vector_elt(v,i))))
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newindent = outindent(newindent, f);
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else
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outc(' ', f);
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}
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}
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}
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outc(']', f);
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break;
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}
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if (iscvalue(v) || iscprim(v))
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cvalue_print(f, v);
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else
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print_pair(f, v);
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break;
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}
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P_LEVEL--;
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}
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static void print_string(ios_t *f, char *str, size_t sz)
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{
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char buf[512];
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size_t i = 0;
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uint8_t c;
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static char hexdig[] = "0123456789abcdef";
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outc('"', f);
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if (!u8_isvalid(str, sz)) {
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// alternate print algorithm that preserves data if it's not UTF-8
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for(i=0; i < sz; i++) {
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c = str[i];
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if (c == '\\')
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outsn("\\\\", f, 2);
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else if (c == '"')
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outsn("\\\"", f, 2);
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else if (c >= 32 && c < 0x7f)
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outc(c, f);
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else {
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outsn("\\x", f, 2);
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outc(hexdig[c>>4], f);
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outc(hexdig[c&0xf], f);
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}
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}
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}
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else {
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while (i < sz) {
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size_t n = u8_escape(buf, sizeof(buf), str, &i, sz, 1, 0);
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outsn(buf, f, n-1);
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}
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}
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outc('"', f);
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}
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static numerictype_t sym_to_numtype(value_t type);
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// 'weak' means we don't need to accurately reproduce the type, so
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// for example #int32(0) can be printed as just 0. this is used
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// printing in a context where a type is already implied, e.g. inside
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// an array.
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static void cvalue_printdata(ios_t *f, void *data, size_t len, value_t type,
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int weak)
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{
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if (type == bytesym) {
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unsigned char ch = *(unsigned char*)data;
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|
if (print_princ)
|
|
outc(ch, f);
|
|
else if (weak)
|
|
HPOS+=ios_printf(f, "0x%hhx", ch);
|
|
else
|
|
HPOS+=ios_printf(f, "#byte(0x%hhx)", ch);
|
|
}
|
|
else if (type == wcharsym) {
|
|
uint32_t wc = *(uint32_t*)data;
|
|
char seq[8];
|
|
size_t nb = u8_toutf8(seq, sizeof(seq), &wc, 1);
|
|
seq[nb] = '\0';
|
|
if (print_princ) {
|
|
// TODO: better multibyte handling
|
|
outs(seq, f);
|
|
}
|
|
else {
|
|
outsn("#\\", f, 2);
|
|
if (wc == 0x00) outsn("nul", f, 3);
|
|
else if (wc == 0x07) outsn("alarm", f, 5);
|
|
else if (wc == 0x08) outsn("backspace", f, 9);
|
|
else if (wc == 0x09) outsn("tab", f, 3);
|
|
else if (wc == 0x0A) outsn("linefeed", f, 8);
|
|
//else if (wc == 0x0A) outsn("newline", f, 7);
|
|
else if (wc == 0x0B) outsn("vtab", f, 4);
|
|
else if (wc == 0x0C) outsn("page", f, 4);
|
|
else if (wc == 0x0D) outsn("return", f, 6);
|
|
else if (wc == 0x1B) outsn("esc", f, 3);
|
|
else if (wc == 0x20) outsn("space", f, 5);
|
|
else if (wc == 0x7F) outsn("delete", f, 6);
|
|
else if (iswprint(wc)) outs(seq, f);
|
|
else HPOS+=ios_printf(f, "x%04x", (int)wc);
|
|
}
|
|
}
|
|
else if (type == floatsym || type == doublesym) {
|
|
char buf[64];
|
|
double d;
|
|
int ndec;
|
|
if (type == floatsym) { d = (double)*(float*)data; ndec = 8; }
|
|
else { d = *(double*)data; ndec = 16; }
|
|
if (!DFINITE(d)) {
|
|
char *rep;
|
|
if (isnan(d))
|
|
rep = sign_bit(d) ? "-nan.0" : "+nan.0";
|
|
else
|
|
rep = sign_bit(d) ? "-inf.0" : "+inf.0";
|
|
if (type == floatsym && !print_princ && !weak)
|
|
HPOS+=ios_printf(f, "#%s(%s)", symbol_name(type), rep);
|
|
else
|
|
outs(rep, f);
|
|
}
|
|
else if (d == 0) {
|
|
if (1/d < 0)
|
|
outsn("-0.0", f, 4);
|
|
else
|
|
outsn("0.0", f, 3);
|
|
if (type == floatsym && !print_princ && !weak)
|
|
outc('f', f);
|
|
}
|
|
else {
|
|
snprint_real(buf, sizeof(buf), d, 0, ndec, 3, 10);
|
|
int hasdec = (strpbrk(buf, ".eE") != NULL);
|
|
outs(buf, f);
|
|
if (!hasdec) outsn(".0", f, 2);
|
|
if (type == floatsym && !print_princ && !weak)
|
|
outc('f', f);
|
|
}
|
|
}
|
|
else if (type == uint64sym
|
|
#ifdef BITS64
|
|
|| type == ulongsym
|
|
#endif
|
|
) {
|
|
uint64_t ui64 = *(uint64_t*)data;
|
|
if (weak || print_princ)
|
|
HPOS += ios_printf(f, "%llu", ui64);
|
|
else
|
|
HPOS += ios_printf(f, "#%s(%llu)", symbol_name(type), ui64);
|
|
}
|
|
else if (issymbol(type)) {
|
|
// handle other integer prims. we know it's smaller than uint64
|
|
// at this point, so int64 is big enough to capture everything.
|
|
int64_t i64 = conv_to_int64(data, sym_to_numtype(type));
|
|
if (weak || print_princ)
|
|
HPOS += ios_printf(f, "%lld", i64);
|
|
else
|
|
HPOS += ios_printf(f, "#%s(%lld)", symbol_name(type), i64);
|
|
}
|
|
else if (iscons(type)) {
|
|
if (car_(type) == arraysym) {
|
|
value_t eltype = car(cdr_(type));
|
|
size_t cnt, elsize;
|
|
if (iscons(cdr_(cdr_(type)))) {
|
|
cnt = toulong(car_(cdr_(cdr_(type))), "length");
|
|
elsize = cnt ? len/cnt : 0;
|
|
}
|
|
else {
|
|
// incomplete array type
|
|
int junk;
|
|
elsize = ctype_sizeof(eltype, &junk);
|
|
cnt = elsize ? len/elsize : 0;
|
|
}
|
|
if (eltype == bytesym) {
|
|
if (print_princ) {
|
|
ios_write(f, data, len);
|
|
/*
|
|
char *nl = memrchr(data, '\n', len);
|
|
if (nl)
|
|
HPOS = u8_strwidth(nl+1);
|
|
else
|
|
HPOS += u8_strwidth(data);
|
|
*/
|
|
}
|
|
else {
|
|
print_string(f, (char*)data, len);
|
|
}
|
|
return;
|
|
}
|
|
else if (eltype == wcharsym) {
|
|
// TODO wchar
|
|
}
|
|
else {
|
|
}
|
|
size_t i;
|
|
if (!weak) {
|
|
if (eltype == uint8sym) {
|
|
outsn("#vu8(", f, 5);
|
|
}
|
|
else {
|
|
outsn("#array(", f, 7);
|
|
fl_print_child(f, eltype);
|
|
if (cnt > 0)
|
|
outc(' ', f);
|
|
}
|
|
}
|
|
else {
|
|
outc('[', f);
|
|
}
|
|
for(i=0; i < cnt; i++) {
|
|
if (i > 0)
|
|
outc(' ', f);
|
|
cvalue_printdata(f, data, elsize, eltype, 1);
|
|
data += elsize;
|
|
}
|
|
if (!weak)
|
|
outc(')', f);
|
|
else
|
|
outc(']', f);
|
|
}
|
|
else if (car_(type) == enumsym) {
|
|
int n = *(int*)data;
|
|
value_t syms = car(cdr_(type));
|
|
assert(isvector(syms));
|
|
if (!weak) {
|
|
outsn("#enum(", f, 6);
|
|
fl_print_child(f, syms);
|
|
outc(' ', f);
|
|
}
|
|
if (n >= (int)vector_size(syms)) {
|
|
cvalue_printdata(f, data, len, int32sym, 1);
|
|
}
|
|
else {
|
|
fl_print_child(f, vector_elt(syms, n));
|
|
}
|
|
if (!weak)
|
|
outc(')', f);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void cvalue_print(ios_t *f, value_t v)
|
|
{
|
|
cvalue_t *cv = (cvalue_t*)ptr(v);
|
|
void *data = cptr(v);
|
|
value_t label;
|
|
|
|
if (cv_class(cv) == builtintype) {
|
|
void *fptr = *(void**)data;
|
|
label = (value_t)ptrhash_get(&reverse_dlsym_lookup_table, cv);
|
|
if (label == (value_t)HT_NOTFOUND) {
|
|
HPOS += ios_printf(f, "#<builtin @0x%08lx>",
|
|
(unsigned long)(builtin_t)fptr);
|
|
}
|
|
else {
|
|
if (print_princ) {
|
|
outs(symbol_name(label), f);
|
|
}
|
|
else {
|
|
outsn("#fn(", f, 4);
|
|
outs(symbol_name(label), f);
|
|
outc(')', f);
|
|
}
|
|
}
|
|
}
|
|
else if (cv_class(cv)->vtable != NULL &&
|
|
cv_class(cv)->vtable->print != NULL) {
|
|
cv_class(cv)->vtable->print(v, f);
|
|
}
|
|
else {
|
|
value_t type = cv_type(cv);
|
|
size_t len = iscprim(v) ? cv_class(cv)->size : cv_len(cv);
|
|
cvalue_printdata(f, data, len, type, 0);
|
|
}
|
|
}
|
|
|
|
static void set_print_width()
|
|
{
|
|
value_t pw = symbol_value(printwidthsym);
|
|
if (!isfixnum(pw)) return;
|
|
SCR_WIDTH = numval(pw);
|
|
}
|
|
|
|
void fl_print(ios_t *f, value_t v)
|
|
{
|
|
print_pretty = (symbol_value(printprettysym) != FL_F);
|
|
if (print_pretty)
|
|
set_print_width();
|
|
print_princ = (symbol_value(printreadablysym) == FL_F);
|
|
|
|
value_t pl = symbol_value(printlengthsym);
|
|
if (isfixnum(pl)) print_length = numval(pl);
|
|
else print_length = -1;
|
|
pl = symbol_value(printlevelsym);
|
|
if (isfixnum(pl)) print_level = numval(pl);
|
|
else print_level = -1;
|
|
P_LEVEL = 0;
|
|
|
|
printlabel = 0;
|
|
print_traverse(v);
|
|
HPOS = VPOS = 0;
|
|
|
|
fl_print_child(f, v);
|
|
|
|
if (print_level >= 0 || print_length >= 0) {
|
|
memset(consflags, 0, 4*bitvector_nwords(heapsize/sizeof(cons_t)));
|
|
}
|
|
|
|
if ((iscons(v) || isvector(v) || isfunction(v) || iscvalue(v)) &&
|
|
!fl_isstring(v) && v!=FL_T && v!=FL_F && v!=FL_NIL) {
|
|
htable_reset(&printconses, 32);
|
|
}
|
|
}
|