diff options
| -rw-r--r-- | src/fix-ng/eval.cc | 56 | ||||
| -rw-r--r-- | src/fix-ng/eval.hh | 3 | ||||
| -rw-r--r-- | src/fix-ng/fix-expr.cc | 122 | ||||
| -rw-r--r-- | src/fix-ng/fix-expr.hh | 40 | ||||
| -rw-r--r-- | src/fix-ng/primops.cc | 16 |
5 files changed, 182 insertions, 55 deletions
diff --git a/src/fix-ng/eval.cc b/src/fix-ng/eval.cc index 726bc5daeb..90b7ff29f2 100644 --- a/src/fix-ng/eval.cc +++ b/src/fix-ng/eval.cc @@ -5,6 +5,7 @@ EvalState::EvalState() + : normalForms(32768, 75) { blackHole = ATmake("BlackHole()"); if (!blackHole) throw Error("cannot build black hole"); @@ -20,32 +21,43 @@ Expr getAttr(EvalState & state, Expr e, const string & name) /* Substitute an argument set into the body of a function. */ static Expr substArgs(Expr body, ATermList formals, Expr arg) { - Subs subs; + ATermMap subs; Expr undefined = ATmake("Undefined"); /* Get the formal arguments. */ while (!ATisEmpty(formals)) { + ATerm t = ATgetFirst(formals); char * s; - if (!ATmatch(ATgetFirst(formals), "<str>", &s)) + if (!ATmatch(t, "<str>", &s)) abort(); /* can't happen */ - subs[s] = undefined; + subs.set(t, undefined); formals = ATgetNext(formals); } /* Get the actual arguments, and check that they match with the formals. */ - Attrs args; + ATermMap args; queryAllAttrs(arg, args); - for (Attrs::iterator i = args.begin(); i != args.end(); i++) { - if (subs.find(i->first) == subs.end()) - throw badTerm(format("argument `%1%' not declared") % i->first, arg); - subs[i->first] = i->second; + for (ATermList keys = args.keys(); !ATisEmpty(keys); + keys = ATgetNext(keys)) + { + Expr key = ATgetFirst(keys); + Expr cur = subs.get(key); + if (!cur) + throw badTerm(format("argument `%1%' not declared") + % aterm2String(key), arg); + subs.set(key, args.get(key)); } /* Check that all arguments are defined. */ - for (Subs::iterator i = subs.begin(); i != subs.end(); i++) - if (i->second == undefined) - throw badTerm(format("formal argument `%1%' missing") % i->first, arg); + for (ATermList keys = subs.keys(); !ATisEmpty(keys); + keys = ATgetNext(keys)) + { + Expr key = ATgetFirst(keys); + if (subs.get(key) == undefined) + throw badTerm(format("formal argument `%1%' missing") + % aterm2String(key), arg); + } return substitute(subs, body); } @@ -59,26 +71,26 @@ static Expr substArgs(Expr body, ATermList formals, Expr arg) ATerm expandRec(ATerm e, ATermList bnds) { /* Create the substitution list. */ - Subs subs; + ATermMap subs; ATermList bs = bnds; while (!ATisEmpty(bs)) { char * s; Expr e2; if (!ATmatch(ATgetFirst(bs), "Bind(<str>, <term>)", &s, &e2)) abort(); /* can't happen */ - subs[s] = ATmake("Select(<term>, <str>)", e, s); + subs.set(s, ATmake("Select(<term>, <str>)", e, s)); bs = ATgetNext(bs); } /* Create the non-recursive set. */ - Attrs as; + ATermMap as; bs = bnds; while (!ATisEmpty(bs)) { char * s; Expr e2; if (!ATmatch(ATgetFirst(bs), "Bind(<str>, <term>)", &s, &e2)) abort(); /* can't happen */ - as[s] = substitute(subs, e2); + as.set(s, substitute(subs, e2)); bs = ATgetNext(bs); } @@ -205,18 +217,18 @@ Expr evalExpr(EvalState & state, Expr e) /* Consult the memo table to quickly get the normal form of previously evaluated expressions. */ - NormalForms::iterator i = state.normalForms.find(e); - if (i != state.normalForms.end()) { - if (i->second == state.blackHole) + Expr nf = state.normalForms.get(e); + if (nf) { + if (nf == state.blackHole) throw badTerm("infinite recursion", e); state.nrCached++; - return i->second; + return nf; } /* Otherwise, evaluate and memoize. */ - state.normalForms[e] = state.blackHole; - Expr nf = evalExpr2(state, e); - state.normalForms[e] = nf; + state.normalForms.set(e, state.blackHole); + nf = evalExpr2(state, e); + state.normalForms.set(e, nf); return nf; } diff --git a/src/fix-ng/eval.hh b/src/fix-ng/eval.hh index 364f28471b..9be3ae2da0 100644 --- a/src/fix-ng/eval.hh +++ b/src/fix-ng/eval.hh @@ -7,13 +7,12 @@ #include "expr.hh" -typedef map<Expr, Expr> NormalForms; typedef map<Path, PathSet> DrvPaths; typedef map<Path, Hash> DrvHashes; struct EvalState { - NormalForms normalForms; + ATermMap normalForms; DrvPaths drvPaths; DrvHashes drvHashes; /* normalised derivation hashes */ Expr blackHole; diff --git a/src/fix-ng/fix-expr.cc b/src/fix-ng/fix-expr.cc index 6333595c63..814e186b41 100644 --- a/src/fix-ng/fix-expr.cc +++ b/src/fix-ng/fix-expr.cc @@ -2,6 +2,91 @@ #include "expr.hh" +ATermMap::ATermMap(unsigned int initialSize, unsigned int maxLoadPct) +{ + table = ATtableCreate(initialSize, maxLoadPct); + if (!table) throw Error("cannot create ATerm table"); +} + + +ATermMap::ATermMap(const ATermMap & map) + : table(0) +{ + ATermList keys = map.keys(); + + /* !!! adjust allocation for load pct */ + table = ATtableCreate(ATgetLength(keys), map.maxLoadPct); + if (!table) throw Error("cannot create ATerm table"); + + for (; !ATisEmpty(keys); keys = ATgetNext(keys)) { + ATerm key = ATgetFirst(keys); + set(key, map.get(key)); + } +} + + +ATermMap::~ATermMap() +{ + if (table) ATtableDestroy(table); +} + + +void ATermMap::set(ATerm key, ATerm value) +{ + return ATtablePut(table, key, value); +} + + +void ATermMap::set(const string & key, ATerm value) +{ + set(string2ATerm(key), value); +} + + +ATerm ATermMap::get(ATerm key) const +{ + return ATtableGet(table, key); +} + + +ATerm ATermMap::get(const string & key) const +{ + return get(string2ATerm(key)); +} + + +void ATermMap::remove(ATerm key) +{ + ATtableRemove(table, key); +} + + +void ATermMap::remove(const string & key) +{ + remove(string2ATerm(key)); +} + + +ATermList ATermMap::keys() const +{ + ATermList keys = ATtableKeys(table); + if (!keys) throw Error("cannot query aterm map keys"); + return keys; +} + + +ATerm string2ATerm(const string & s) +{ + return (ATerm) ATmakeAppl0(ATmakeAFun((char *) s.c_str(), 0, ATtrue)); +} + + +string aterm2String(ATerm t) +{ + return ATgetName(ATgetAFun(t)); +} + + ATerm bottomupRewrite(TermFun & f, ATerm e) { if (ATgetType(e) == AT_APPL) { @@ -31,7 +116,7 @@ ATerm bottomupRewrite(TermFun & f, ATerm e) } -void queryAllAttrs(Expr e, Attrs & attrs) +void queryAllAttrs(Expr e, ATermMap & attrs) { ATermList bnds; if (!ATmatch(e, "Attrs([<list>])", &bnds)) @@ -42,7 +127,7 @@ void queryAllAttrs(Expr e, Attrs & attrs) Expr e; if (!ATmatch(ATgetFirst(bnds), "Bind(<str>, <term>)", &s, &e)) abort(); /* can't happen */ - attrs[s] = e; + attrs.set(s, e); bnds = ATgetNext(bnds); } } @@ -50,33 +135,32 @@ void queryAllAttrs(Expr e, Attrs & attrs) Expr queryAttr(Expr e, const string & name) { - Attrs attrs; + ATermMap attrs; queryAllAttrs(e, attrs); - Attrs::iterator i = attrs.find(name); - return i == attrs.end() ? 0 : i->second; + return attrs.get(name); } -Expr makeAttrs(const Attrs & attrs) +Expr makeAttrs(const ATermMap & attrs) { - ATermList bnds = ATempty; - for (Attrs::const_iterator i = attrs.begin(); i != attrs.end(); i++) + ATermList bnds = ATempty, keys = attrs.keys(); + while (!ATisEmpty(keys)) { + Expr key = ATgetFirst(keys); bnds = ATinsert(bnds, - ATmake("Bind(<str>, <term>)", i->first.c_str(), i->second)); + ATmake("Bind(<term>, <term>)", key, attrs.get(key))); + keys = ATgetNext(keys); + } return ATmake("Attrs(<term>)", ATreverse(bnds)); } -ATerm substitute(Subs & subs, ATerm e) +Expr substitute(const ATermMap & subs, Expr e) { char * s; if (ATmatch(e, "Var(<str>)", &s)) { - Subs::iterator i = subs.find(s); - if (i == subs.end()) - return e; - else - return i->second; + Expr sub = subs.get(s); + return sub ? sub : e; } /* In case of a function, filter out all variables bound by this @@ -84,11 +168,11 @@ ATerm substitute(Subs & subs, ATerm e) ATermList formals; ATerm body; if (ATmatch(e, "Function([<list>], <term>)", &formals, &body)) { - Subs subs2(subs); + ATermMap subs2(subs); ATermList fs = formals; while (!ATisEmpty(fs)) { if (!ATmatch(ATgetFirst(fs), "<str>", &s)) abort(); - subs2.erase(s); + subs2.remove(s); fs = ATgetNext(fs); } return ATmake("Function(<term>, <term>)", formals, @@ -98,13 +182,13 @@ ATerm substitute(Subs & subs, ATerm e) /* Idem for a mutually recursive attribute set. */ ATermList bindings; if (ATmatch(e, "Rec([<list>])", &bindings)) { - Subs subs2(subs); + ATermMap subs2(subs); ATermList bnds = bindings; while (!ATisEmpty(bnds)) { Expr e; if (!ATmatch(ATgetFirst(bnds), "Bind(<str>, <term>)", &s, &e)) abort(); /* can't happen */ - subs2.erase(s); + subs2.remove(s); bnds = ATgetNext(bnds); } return ATmake("Rec(<term>)", substitute(subs2, (ATerm) bindings)); diff --git a/src/fix-ng/fix-expr.hh b/src/fix-ng/fix-expr.hh index 700f7beca9..93a010abed 100644 --- a/src/fix-ng/fix-expr.hh +++ b/src/fix-ng/fix-expr.hh @@ -14,6 +14,38 @@ typedef ATerm Expr; +/* Mappings from ATerms to ATerms. This is just a wrapper around + ATerm tables. */ +class ATermMap +{ +private: + unsigned int maxLoadPct; + ATermTable table; + +public: + ATermMap(unsigned int initialSize = 16, unsigned int maxLoadPct = 75); + ATermMap(const ATermMap & map); + ~ATermMap(); + + void set(ATerm key, ATerm value); + void set(const string & key, ATerm value); + + ATerm get(ATerm key) const; + ATerm get(const string & key) const; + + void remove(ATerm key); + void remove(const string & key); + + ATermList keys() const; +}; + + +/* Convert a string to an ATerm (i.e., a quoted nullary function + applicaton). */ +ATerm string2ATerm(const string & s); +string aterm2String(ATerm t); + + /* Generic bottomup traversal over ATerms. The traversal first recursively descends into subterms, and then applies the given term function to the resulting term. */ @@ -25,19 +57,17 @@ ATerm bottomupRewrite(TermFun & f, ATerm e); /* Query all attributes in an attribute set expression. The expression must be in normal form. */ -typedef map<string, Expr> Attrs; -void queryAllAttrs(Expr e, Attrs & attrs); +void queryAllAttrs(Expr e, ATermMap & attrs); /* Query a specific attribute from an attribute set expression. The expression must be in normal form. */ Expr queryAttr(Expr e, const string & name); /* Create an attribute set expression from an Attrs value. */ -Expr makeAttrs(const Attrs & attrs); +Expr makeAttrs(const ATermMap & attrs); /* Perform a set of substitutions on an expression. */ -typedef map<string, Expr> Subs; -ATerm substitute(Subs & subs, ATerm e); +Expr substitute(const ATermMap & subs, Expr e); #endif /* !__FIXEXPR_H */ diff --git a/src/fix-ng/primops.cc b/src/fix-ng/primops.cc index f887d265f3..ef0fd354ef 100644 --- a/src/fix-ng/primops.cc +++ b/src/fix-ng/primops.cc @@ -123,7 +123,7 @@ Expr primDerivation(EvalState & state, Expr args) { Nest nest(lvlVomit, "evaluating derivation"); - Attrs attrs; + ATermMap attrs; args = evalExpr(state, args); queryAllAttrs(args, attrs); @@ -136,9 +136,11 @@ Expr primDerivation(EvalState & state, Expr args) Hash outHash; bool outHashGiven = false; - for (Attrs::iterator i = attrs.begin(); i != attrs.end(); i++) { - string key = i->first; - Expr value = i->second; + for (ATermList keys = attrs.keys(); !ATisEmpty(keys); + keys = ATgetNext(keys)) + { + string key = aterm2String(ATgetFirst(keys)); + Expr value = attrs.get(key); Nest nest(lvlVomit, format("processing attribute `%1%'") % key); /* The `args' attribute is special: it supplies the @@ -198,9 +200,9 @@ Expr primDerivation(EvalState & state, Expr args) msg(lvlChatty, format("instantiated `%1%' -> `%2%'") % drvName % drvPath); - attrs["outPath"] = ATmake("Path(<str>)", outPath.c_str()); - attrs["drvPath"] = ATmake("Path(<str>)", drvPath.c_str()); - attrs["type"] = ATmake("Str(\"derivation\")"); + attrs.set("outPath", ATmake("Path(<str>)", outPath.c_str())); + attrs.set("drvPath", ATmake("Path(<str>)", drvPath.c_str())); + attrs.set("type", ATmake("Str(\"derivation\")")); return makeAttrs(attrs); } |