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fnfmt.c
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#include "sys.h"
#include "util.h"
#include "syscqct.h"
enum{
FmtWidth = 1,
FmtLeft = FmtWidth << 1,
FmtPrec = FmtLeft << 1,
FmtSharp = FmtPrec << 1,
FmtSpace = FmtSharp << 1,
FmtSign = FmtSpace << 1,
FmtZero = FmtSign << 1,
FmtFlag = FmtZero << 1
};
/* distinct, cqct-specific approximation of Fmt in x/lib9 */
typedef struct Fmt Fmt;
struct Fmt {
char *start, *to, *stop;
int (*flush)(VM*, Fmt*);
void *farg;
int width;
int prec;
unsigned int flags;
};
static char* _fmtctype(Ctype *t, char *o);
static char* _fmtdecl(Ctype *t, Cid *is);
static char*
fmtplist(Vec *param)
{
char **ds, *buf, *bp;
Imm i, n;
unsigned long m;
Ctype *t;
Vec *pvec;
Val id;
n = param->len;
if(n == 0)
return xstrdup("");
ds = emalloc(n*sizeof(char**));
m = 1; /* null */
for(i = 0; i < n; i++){
pvec = valvec(vecref(param, i));
t = valctype(vecref(pvec, Typepos));
id = vecref(pvec, 1);
if(Viskind(id, Qcid))
ds[i] = _fmtdecl(t, valcid(id));
else
ds[i] = _fmtctype(t, xstrdup(""));
m += strlen(ds[i]);
if(i < n-1)
m += 2; /* comma, space */
}
buf = emalloc(m);
bp = buf;
for(i = 0; i < n; i++){
strcpy(bp, ds[i]);
bp += strlen(ds[i]);
efree(ds[i]);
if(i < n-1){
strcpy(bp, ", ");
bp += 2;
}
}
*bp = 0;
efree(ds);
return buf;
}
static char*
_fmtctype(Ctype *t, char *o)
{
char *buf, *w, *pl;
unsigned m, leno;
Cid *id;
Cbase cb;
Cval *cv;
Ctype *sub;
Ctypearr *ta;
Ctypefunc *tf;
leno = strlen(o);
switch(t->tkind){
case Tvoid:
m = 4+1+leno+1;
buf = emalloc(m);
if(leno)
snprint(buf, m, "void %s", o);
else
snprint(buf, m, "void");
efree(o);
return buf;
case Tbase:
cb = typecbase(t);
m = strlen(cbasename[cb])+1+leno+1;
buf = emalloc(m);
if(leno)
snprint(buf, m, "%s %s", cbasename[cb], o);
else
snprint(buf, m, "%s", cbasename[cb]);
efree(o);
return buf;
case Ttypedef:
id = typetid(t);
m = id->len+1+leno+1;
buf = emalloc(m);
if(leno)
snprint(buf, m, "%.*s %s",
(int)id->len, ciddata(id), o);
else
snprint(buf, m, "%.*s",
(int)id->len, ciddata(id));
efree(o);
return buf;
case Tstruct:
case Tunion:
case Tenum:
w = tkindstr[t->tkind];
id = typetag(t);
if(id){
m = strlen(w)+1+id->len+1+leno+1;
buf = emalloc(m);
if(leno)
snprint(buf, m, "%s %.*s %s",
w, (int)id->len, ciddata(id), o);
else
snprint(buf, m, "%s %.*s", w,
(int)id->len, ciddata(id));
}else{
m = strlen(w)+1+leno+1;
buf = emalloc(m);
if(leno)
snprint(buf, m, "%s %s", w, o);
else
snprint(buf, m, "%s", w);
}
efree(o);
return buf;
case Tundef:
return _fmtctype(subtype(t), o);
case Tptr:
m = 2+leno+1+1;
buf = emalloc(m);
sub = subtype(t);
if(sub->tkind == Tfun || sub->tkind == Tarr)
snprint(buf, m, "(*%s)", o);
else
snprint(buf, m, "*%s", o);
efree(o);
return _fmtctype(sub, buf);
case Tarr:
ta = (Ctypearr*)t;
m = leno+1+10+1+1; /* assume max 10 digit size */
buf = emalloc(m);
if(Viskind(ta->cnt, Qnil))
snprint(buf, m, "%s[]", o);
else{
cv = valcval(ta->cnt);
snprint(buf, m, "%s[%" PRIu64 "]", o, cvalu(cv));
}
efree(o);
return _fmtctype(subtype(t), buf);
case Tfun:
tf = (Ctypefunc*)t;
pl = fmtplist(tf->param);
m = leno+1+strlen(pl)+1+1;
buf = emalloc(m);
snprint(buf, m, "%s(%s)", o, pl);
efree(o);
efree(pl);
return _fmtctype(subtype(t), buf);
case Tconst:
case Tbitfield:
/* this is questionable...maybe we want more accurate printed
representation of these objects, especially bitfields */
return _fmtctype(subtype(t), o);
}
return 0;
}
static char*
_fmtdecl(Ctype *t, Cid *id)
{
char *o;
o = emalloc(id->len+1);
memcpy(o, ciddata(id), id->len);
return _fmtctype(t, o);
}
static Str*
fmtdecl(Ctype *t, Cid *id)
{
char *s;
Str *str;
s = _fmtdecl(t, id);
str = mkstr0(s);
efree(s);
return str;
}
char*
fmtctypec(Ctype *t)
{
return _fmtctype(t, xstrdup(""));
}
Str*
fmtctype(Ctype *t)
{
char *s;
Str *str;
s = fmtctypec(t);
str = mkstr0(s);
efree(s);
return str;
}
static int
cval2int(Cval *cv)
{
/* FIXME: implement with rerep? */
Ctype *t;
t = chasetype(cv->type);
switch(typerep(t)){
case Rs08le:
case Rs08be:
return (int)(s8)cvalu(cv);
case Rs16le:
case Rs16be:
return (int)(s16)cvalu(cv);
case Rs32le:
case Rs32be:
return (int)(s32)cvalu(cv);
case Rs64le:
case Rs64be:
return (int)(s64)cvalu(cv);
case Ru08le:
case Ru08be:
return (int)(u8)cvalu(cv);
case Ru16le:
case Ru16be:
return (int)(u16)cvalu(cv);
case Ru32le:
case Ru32be:
return (int)(u32)cvalu(cv);
case Ru64le:
case Ru64be:
return (int)(u64)cvalu(cv);
default:
bug();
}
}
static int
fmtputc(VM *vm, Fmt *f, char ch)
{
if(f->to >= f->stop)
if(f->flush(vm, f) == -1)
return -1;
*f->to++ = ch;
return 0;
}
static int
fmtpad(VM *vm, Fmt *f, int n)
{
char c;
c = (f->flags&FmtZero) ? '0' : ' ';
while(n-- > 0)
if(fmtputc(vm, f, c))
return -1;
return 0;
}
static int
fmtputs(VM *vm, Fmt *f, char *p, Imm m)
{
unsigned int fl, l;
fl = f->flags;
if((fl&FmtPrec) && m > f->prec)
m = f->prec;
l = m; /* lost precision */
if((fl&FmtWidth) && !(fl&FmtLeft)){
if(fmtpad(vm, f, f->width-m))
return -1;
}
while(l-- > 0)
fmtputc(vm, f, *p++);
if((fl&FmtWidth) && (fl&FmtLeft)){
if(fmtpad(vm, f, f->width-m))
return -1;
}
return 0;
}
static int
fmtputB(VM *vm, Fmt *f, char *p, Imm m)
{
unsigned int fl, l;
char *q;
unsigned char c;
Imm w;
w = 0;
fl = f->flags;
if((fl&FmtPrec) && m > f->prec)
m = f->prec;
if(fl&FmtWidth){
q = p;
l = m; /* lost precision */
while(l-- > 0){
c = *q++;
if(xisgraph(c) || xisspace(c))
w++;
else
w += 4;
}
}
l = m; /* lost precision */
if((fl&FmtWidth) && !(fl&FmtLeft)){
if(fmtpad(vm, f, f->width-w))
return -1;
}
while(l-- > 0){
c = *p++;
if(c == '\\'){
fmtputc(vm, f, '\\');
fmtputc(vm, f, '\\');
}else if(c == '\"'){
fmtputc(vm, f, '\\');
fmtputc(vm, f, '\"');
}else if(xisgraph(c) || xisspace(c))
fmtputc(vm, f, c);
else{
fmtputc(vm, f, '\\');
fmtputc(vm, f, '0'+((c>>6)&0x3));
fmtputc(vm, f, '0'+((c>>3)&0x7));
fmtputc(vm, f, '0'+(c&0x7));
}
}
if((fl&FmtWidth) && (fl&FmtLeft)){
if(fmtpad(vm, f, f->width-w))
return -1;
}
return 0;
}
static int
fmtputs0(VM *vm, Fmt *f, char *p)
{
return fmtputs(vm, f, p, strlen(p));
}
static int
listmember(List* lst, Val v)
{
Imm len, i;
len = listlen(lst);
for(i = 0; i < len; i++)
if(eqval(v, listref(lst, i)))
return 1;
return 0;
}
static int
fmtval(VM *vm, Fmt *f, Val val, List* seen)
{
char buf[256];
Cval *cv;
Closure *cl;
Code *cd;
List *l;
Pair *p;
Vec *v;
Range *r;
//Rd *rd;
Cid *id;
//Rec *rec;
Str *str;
Val bv, rv;
u32 m;
Imm n;
Dom *d;
As *as;
Ns *ns;
Ctype *t;
float fv;
double dv;
Cbase cb;
Expr *e;
Val x;
if(listmember(seen, val))
return fmtputs0(vm, f, "<recursive data>");
switch(Vkind(val)){
case Qcval:
cv = valcval(val);
t = chasetype(cv->type);
switch(t->tkind){
case Tbase:
cb = typecbase(t);
if(isfloat[cb]){
switch(cb){
case Vfloat:
fv = cvalf(cv);
snprintf(buf, sizeof(buf), "%f",
(double)fv);
break;
case Vdouble:
dv = cvald(cv);
snprintf(buf, sizeof(buf), "%f", dv);
break;
case Vlongdouble:
case Vcomplex:
case Vdoublex:
case Vlongdoublex:
vmerr(vm, "formatter does not support %s",
cbasename[cb]);
default:
fatal("bug");
}
}else if(isunsigned[cb])
snprint(buf, sizeof(buf), "%" PRIu64,
cvalu(cv));
else
snprint(buf, sizeof(buf), "%" PRId64,
(int64_t)cvalu(cv));
break;
case Tptr:
snprint(buf, sizeof(buf), "%" PRIx64, cvalu(cv));
break;
default:
fatal("bug");
}
return fmtputs0(vm, f, buf);
case Qcl:
cl = valcl(val);
/* FIXME distinguish continuations */
if(cl->dlen > 0){
if(fmtputs0(vm, f, "<closure "))
return -1;
}else{
if(fmtputs0(vm, f, "<procedure "))
return -1;
}
if(fmtputB(vm, f, ciddata(cl->code->id), cl->code->id->len-1))
return -1;
return fmtputs0(vm, f, ">");
case Qnil:
return fmtputs0(vm, f, "<nil>");
case Qbox:
if(fmtputs0(vm, f, "<box "))
return -1;
bv = valboxed(val);
listins(vm, seen, 0, val);
if(fmtval(vm, f, bv, seen))
return -1;
listpop(seen, &x);
return fmtputs0(vm, f, ">");
case Qns:
ns = valns(val);
if(ns->name)
snprint(buf, sizeof(buf), "<ns %.*s>",
(int)ns->name->len, strdata(ns->name));
else
snprint(buf, sizeof(buf), "<ns>");
return fmtputs0(vm, f, buf);
case Qas:
as = valas(val);
if(as->name)
snprint(buf, sizeof(buf), "<as %.*s>",
(int)as->name->len, strdata(as->name));
else
snprint(buf, sizeof(buf), "<as>");
return fmtputs0(vm, f, buf);
case Qdom:
d = valdom(val);
if(d->name)
snprint(buf, sizeof(buf), "<domain %.*s>",
(int)d->name->len, strdata(d->name));
else
snprint(buf, sizeof(buf), "<domain>");
return fmtputs0(vm, f, buf);
case Qtab:
if(valtab(val)->priv) {
if(valtab(val)->fmt) {
rv = ccall(vm, valtab(val)->fmt, 1, &val);
if(!Viskind(rv, Qstr))
vmerr(vm, "formatter for table must return a string");
str = valstr(rv);
return fmtputs(vm, f, strdata(str), str->len);
} else if(!valtab(val)->name) {
return fmtputs0(vm, f, "<table>");
} else {
if(fmtputs0(vm, f, "<"))
return -1;
if(fmtputB(vm, f, strdata(valtab(val)->name), valtab(val)->name->len))
return -1;
if(fmtputs0(vm, f, ">"))
return -1;
return 0;
}
}
v = tabenum(valtab(val));
n = v->len/2;
if(fmtputs0(vm, f, "table(["))
return -1;
listins(vm, seen, 0, val);
for(m = 0; m < n; m++){
if(m > 0){
if(fmtputs0(vm, f, ", "))
return -1;
}else{
if(fmtputs0(vm, f, " "))
return -1;
}
if(fmtval(vm, f, vecdata(v)[m], seen))
return -1;
if(fmtputs0(vm, f, " : "))
return -1;
if(fmtval(vm, f, vecdata(v)[m+v->len/2], seen))
return -1;
}
listpop(seen, &x);
return fmtputs0(vm, f, " ])");
case Qctype:
str = fmtctype(valctype(val));
return fmtputB(vm, f, strdata(str), str->len);
case Qvec:
v = valvec(val);
if(fmtputs0(vm, f, "vector("))
return -1;
listins(vm, seen, 0, val);
for(m = 0; m < v->len; m++){
if(m > 0){
if(fmtputs0(vm, f, ", "))
return -1;
}else{
if(fmtputs0(vm, f, " "))
return -1;
}
if(fmtval(vm, f, vecdata(v)[m], seen))
return -1;
}
listpop(seen, &x);
return fmtputs0(vm, f, " )");
case Qlist:
l = vallist(val);
n = listlen(l);
if(n > 20)
n = 20;
if(fmtputs0(vm, f, "["))
return -1;
listins(vm, seen, 0, val);
for(m = 0; m < n; m++){
if(m > 0){
if(fmtputs0(vm, f, ", "))
return -1;
}else{
if(fmtputs0(vm, f, " "))
return -1;
}
if(fmtval(vm, f, listref(l, m), seen))
return -1;
}
listpop(seen, &x);
if(n < listlen(l)){
snprint(buf, sizeof(buf), ", ... (%" PRId64 " more)", (int64_t)listlen(l)-n);
if(fmtputs0(vm, f, buf))
return -1;
}
return fmtputs0(vm, f, " ]");
case Qpair:
p = valpair(val);
if (isweak(&p->hd)) {
if(fmtputs0(vm, f, "weakcons("))
return -1;
}
else {
if(fmtputs0(vm, f, "cons("))
return -1;
}
listins(vm, seen, 0, val);
if(fmtval(vm, f, p->car, seen))
return -1;
if(fmtputs0(vm, f, ", "))
return -1;
if(fmtval(vm, f, p->cdr, seen))
return -1;
listpop(seen, &x);
return fmtputs0(vm, f, ")");
case Qrange:
r = valrange(val);
snprint(buf, sizeof(buf),
"<range 0x%" PRIx64 " 0x%" PRIx64 ">",
cvalu(r->beg), cvalu(r->len));
return fmtputs0(vm, f, buf);
case Qcid:
id = valcid(val);
return fmtputB(vm, f, ciddata(id), id->len-1);
case Qstr:
str = valstr(val);
if(fmtputs0(vm, f, "\""))
return -1;
if(fmtputB(vm, f, strdata(str), str->len))
return -1;
return fmtputs0(vm, f, "\"");
case Qcode:
cd = valcode(val);
if(fmtputs0(vm, f, "<code "))
return -1;
if(fmtputB(vm, f, ciddata(cd->id), cd->id->len-1))
return -1;
return fmtputs0(vm, f, ">");
case Qcont:
return fmtputs0(vm, f, "<stack>");
case Qexpr:
e = valexpr(val);
switch(e->kind){
case Eid:
if(fmtputs0(vm, f, "#id('"))
return -1;
if(fmtputs0(vm, f, ciddata(valcid(e->aux))))
return -1;
if(fmtputs0(vm, f, ")"))
return -1;
break;
case Eval:
if(fmtputs0(vm, f, "#val("))
return -1;
listins(vm, seen, 0, val);
if(Vkind(e->aux) == Qcval) {
if(fmtval(vm, f, e->aux, seen))
return -1;
} else if(Vkind(e->aux) == Qcid) {
char *s;
s = ciddata(valcid(e->aux));
// we lack a syntax for unparseable cids.
if(strchr(s, '.') || strchr(s, ' ')) {
if(fmtputs0(vm, f, "mkcid(\""))
return -1;
if(fmtval(vm, f, e->aux, seen))
return -1;
if(fmtputs0(vm, f, "\")"))
return -1;
} else {
if(fmtputs0(vm, f, "'"))
return -1;
if(fmtval(vm, f, e->aux, seen))
return -1;
}
} else if(Vkind(e->aux) == Qstr) {
if(fmtval(vm, f, e->aux, seen))
return -1;
} else if(Vkind(e->aux) == Qctype) {
if(fmtputs0(vm, f, "@typename("))
return -1;
if(fmtval(vm, f, e->aux, seen))
return -1;
if(fmtputs0(vm, f, ")"))
return -1;
} else {
if(fmtval(vm, f, e->aux, seen))
return -1;
}
listpop(seen, &x);
if(fmtputs0(vm, f, ")"))
return -1;
break;
case Enull:
return fmtputs0(vm, f, "#[]");
case Eelist:
/* FIXME: don't assume the elist is well formed */
if(fmtputs0(vm, f, "#["))
return -1;
n = elistlen(e);
listins(vm, seen, 0, val);
for(m = 0; m < n; m++, e = e->e2){
if(m > 0){
if(fmtputs0(vm, f, ", "))
return -1;
}else{
if(fmtputs0(vm, f, " "))
return -1;
}
if(fmtval(vm, f, e->e1 ? mkvalexpr(e->e1) : Xnil, seen))
return -1;
}
listpop(seen, &x);
return fmtputs0(vm, f, " ]");
default:
listins(vm, seen, 0, val);
if(fmtputs0(vm, f, "#"))
return -1;
if(fmtputs0(vm, f, ciddata(e->skind)))
return -1;
if(fmtputs0(vm, f, "("))
return -1;
if(e->e1 == 0)
goto endexpr;
if(fmtval(vm, f, mkvalexpr(e->e1), seen))
return -1;
if(e->e2 == 0)
goto endexpr;
if(fmtputs0(vm, f, ", "))
return -1;
if(fmtval(vm, f, mkvalexpr(e->e2), seen))
return -1;
if(e->e3 == 0)
goto endexpr;
if(fmtputs0(vm, f, ", "))
return -1;
if(fmtval(vm, f, mkvalexpr(e->e3), seen))
return -1;
if(e->e4 == 0)
goto endexpr;
if(fmtputs0(vm, f, ", "))
return -1;
if(fmtval(vm, f, mkvalexpr(e->e4), seen))
return -1;
endexpr:
listpop(seen, &x);
if(fmtputs0(vm, f, ")"))
return -1;
break;
}
return 0;
default:
snprint(buf, sizeof(buf), "<unhandled type %d>", Vkind(val));
return fmtputs0(vm, f, buf);
}
}
static int
fmticval(VM *vm, Fmt *f, unsigned char conv, Cval *cv)
{
static char buf[Maxprintint];
static char fmt[1+3+1+Maxprintint+5];
static char mod[4], *mp;
unsigned int fl;
char *fp;
float fv;
double dv;
Rkind rep;
static char* fmttab[Rnrep][256] = {
[Ru08le]['d'] = PRId8, [Ru08le]['i'] = PRIi8,
[Ru08be]['d'] = PRId8, [Ru08be]['i'] = PRIi8,
[Rs08le]['d'] = PRId8, [Rs08le]['i'] = PRIi8,
[Rs08be]['d'] = PRId8, [Rs08be]['i'] = PRIi8,
[Ru16le]['d'] = PRId16, [Ru16le]['i'] = PRIi16,
[Ru16be]['d'] = PRId16, [Ru16be]['i'] = PRIi16,
[Rs16le]['d'] = PRId16, [Rs16le]['i'] = PRIi16,
[Rs16be]['d'] = PRId16, [Rs16be]['i'] = PRIi16,
[Ru32le]['d'] = PRId32, [Ru32le]['i'] = PRIi32,
[Ru32be]['d'] = PRId32, [Ru32be]['i'] = PRIi32,
[Rs32le]['d'] = PRId32, [Rs32le]['i'] = PRIi32,
[Rs32be]['d'] = PRId32, [Rs32be]['i'] = PRIi32,
[Ru64le]['d'] = PRId64, [Ru64le]['i'] = PRIi64,
[Ru64be]['d'] = PRId64, [Ru64be]['i'] = PRIi64,
[Rs64le]['d'] = PRId64, [Rs64le]['i'] = PRIi64,
[Rs64be]['d'] = PRId64, [Rs64be]['i'] = PRIi64,
[Ru08le]['o'] = PRIo8, [Ru08le]['u'] = PRIu8,
[Ru08be]['o'] = PRIo8, [Ru08be]['u'] = PRIu8,
[Rs08le]['o'] = PRIo8, [Rs08le]['u'] = PRIu8,
[Rs08be]['o'] = PRIo8, [Rs08be]['u'] = PRIu8,
[Ru16le]['o'] = PRIo16, [Ru16le]['u'] = PRIu16,
[Ru16be]['o'] = PRIo16, [Ru16be]['u'] = PRIu16,
[Rs16le]['o'] = PRIo16, [Rs16le]['u'] = PRIu16,
[Rs16be]['o'] = PRIo16, [Rs16be]['u'] = PRIu16,
[Ru32le]['o'] = PRIo32, [Ru32le]['u'] = PRIu32,
[Ru32be]['o'] = PRIo32, [Ru32be]['u'] = PRIu32,
[Rs32le]['o'] = PRIo32, [Rs32le]['u'] = PRIu32,
[Rs32be]['o'] = PRIo32, [Rs32be]['u'] = PRIu32,
[Ru64le]['o'] = PRIo64, [Ru64le]['u'] = PRIu64,
[Ru64be]['o'] = PRIo64, [Ru64be]['u'] = PRIu64,
[Rs64le]['o'] = PRIo64, [Rs64le]['u'] = PRIu64,
[Rs64be]['o'] = PRIo64, [Rs64be]['u'] = PRIu64,
[Ru08le]['x'] = PRIx8, [Ru08le]['X'] = PRIX8,
[Ru08be]['x'] = PRIx8, [Ru08be]['X'] = PRIX8,
[Rs08le]['x'] = PRIx8, [Rs08le]['X'] = PRIX8,
[Rs08be]['x'] = PRIx8, [Rs08be]['X'] = PRIX8,
[Ru16le]['x'] = PRIx16, [Ru16le]['X'] = PRIX16,
[Ru16be]['x'] = PRIx16, [Ru16be]['X'] = PRIX16,
[Rs16le]['x'] = PRIx16, [Rs16le]['X'] = PRIX16,
[Rs16be]['x'] = PRIx16, [Rs16be]['X'] = PRIX16,
[Ru32le]['x'] = PRIx32, [Ru32le]['X'] = PRIX32,
[Ru32be]['x'] = PRIx32, [Ru32be]['X'] = PRIX32,
[Rs32le]['x'] = PRIx32, [Rs32le]['X'] = PRIX32,
[Rs32be]['x'] = PRIx32, [Rs32be]['X'] = PRIX32,
[Ru64le]['x'] = PRIx64, [Ru64le]['X'] = PRIX64,
[Ru64be]['x'] = PRIx64, [Ru64be]['X'] = PRIX64,
[Rs64le]['x'] = PRIx64, [Rs64le]['X'] = PRIX64,
[Rs64be]['x'] = PRIx64, [Rs64be]['X'] = PRIX64,
[Rf32]['f'] = "f",
[Rf64]['f'] = "f",
[Rf32]['g'] = "g",
[Rf64]['g'] = "g",
};
rep = typerep(chasetype(cv->type));
fp = fmttab[rep][conv];
fl = f->flags;
f->flags &= ~(FmtWidth|FmtPrec|FmtSpace|FmtSign|FmtSharp);
mp = mod;
if(fl&FmtSharp)
*mp++ = '#';
if(fl&FmtSign)
*mp++ = '+'; /* trumps FmtSpace */
else if(fl&FmtSpace)
*mp++ = ' ';
if(fl&FmtLeft)
*mp++ = '-'; /* trumps FmtZero */
else if(fl&FmtZero)
*mp++ = '0';
*mp = 0;
if((fl&FmtWidth) && (fl&FmtPrec))
snprint(fmt, sizeof(fmt), "%%%s%d.%d%s", mod, f->width, f->prec, fp);
else if(fl&FmtPrec)
snprint(fmt, sizeof(fmt), "%%%s.%d%s", mod, f->prec, fp);
else if(fl&FmtWidth)
snprint(fmt, sizeof(fmt), "%%%s%d%s", mod, f->width, fp);
else
snprint(fmt, sizeof(fmt), "%%%s%s", mod, fp);
switch(rep){
case Ru08le:
case Ru08be:
snprint(buf, sizeof(buf), fmt, (u8)cvalu(cv));
break;
case Rs08le:
case Rs08be:
snprint(buf, sizeof(buf), fmt, (s8)cvalu(cv));
break;
case Ru16le:
case Ru16be:
snprint(buf, sizeof(buf), fmt, (u16)cvalu(cv));
break;
case Rs16le:
case Rs16be:
snprint(buf, sizeof(buf), fmt, (s16)cvalu(cv));
break;
case Ru32le:
case Ru32be:
snprint(buf, sizeof(buf), fmt, (u32)cvalu(cv));
break;
case Rs32le:
case Rs32be:
snprint(buf, sizeof(buf), fmt, (s32)cvalu(cv));
break;
case Ru64le:
case Ru64be:
snprint(buf, sizeof(buf), fmt, (u64)cvalu(cv));
break;
case Rs64le:
case Rs64be:
snprint(buf, sizeof(buf), fmt, (s64)cvalu(cv));
break;
case Rf32:
fv = cvalf(cv);
snprint(buf, sizeof(buf), fmt, fv);
break;
case Rf64:
dv = cvald(cv);
snprint(buf, sizeof(buf), fmt, dv);
break;
default:
fatal("bug");
}
return fmtputs(vm, f, buf, strlen(buf));
}
static int
fmtenconst(VM *vm, Fmt *f, Cval *cv)
{
Ctype *t;
Ctypeenum *te;
Vec *v;
Cval *k;
Cid *id;
u32 m;
t = cv->type;
while(t->tkind == Ttypedef)
t = subtype(t);
if(t->tkind != Tenum)
return fmticval(vm, f, 'd', cv);
te = (Ctypeenum*)t;
for(m = 0; m < te->konst->len; m++){
v = valvec(vecref(te->konst, m));
k = valcval(vecref(v, 1));
/* direct comparison is sane because
* enum consts all have the same
* type */
if(cvalu(cv) == cvalu(k)){
id = valcid(vecref(v, 0));
return fmtputs(vm, f, ciddata(id), id->len-1);
}
}
return fmticval(vm, f, 'd', cv);
}
/* dofmt: dispatch format conversions.
based on code and ideas from plan 9 libc */
static void
dofmt(VM *vm, Fmt *f, char *fmt, Imm fmtlen, Imm argc, Val *argv)
{
static char buf[3+Maxprintint];
Val *vpp, vp, vq;
Cval *cv, *cv1;
Str *as, *ys;
Cid *xs;
char *sfmt, *efmt, *p;
char ch;
unsigned char c;
Ctype *t;
Vec *vec;
int i;
Imm len;
Val xargv[2];
vpp = &argv[0];
ch = 0;
efmt = fmt+fmtlen;
while(1){
ch = 0;
while(fmt < efmt && (ch = *fmt++) != '%')
if(fmtputc(vm, f, ch))
return;
sfmt = fmt-1;
if(ch == '%' && fmt >= efmt)
goto fail;
if(fmt >= efmt)
return;
if(*fmt == '%'){
if(fmtputc(vm, f, ch))
return;
fmt++;
continue;
}
if(argc == 0)
vmerr(vm, "format string needs more arguments");
vp = *vpp++;
argc--;
f->flags = 0;
f->width = 0;
f->prec = 0;
morespec:
if(fmt >= efmt)
goto fail;
ch = *fmt++;
switch(ch){
case '.':
f->flags |= FmtWidth|FmtPrec;
goto morespec;
case '0':
if(!(f->flags&FmtWidth)){
f->flags |= FmtZero;
goto morespec;
}
/* fall through */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
i = 0;
while(ch >= '0' && ch <= '9'){
i = i*10+ch-'0';
if(fmt >= efmt)
return;
ch = *fmt++;
}
fmt--;
numflag:
if(f->flags&FmtWidth){
f->flags |= FmtPrec;