GCOV - Varnish Cache


/*-
 * Copyright (c) 2010 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/*lint -save -esym(759, SYMTAB_NOERR) -esym(765, SYMTAB_NOERR)*/

#include "config.h"

#include <ctype.h>
#include <stdlib.h>
#include <string.h>

#include "vcc_compile.h"

#include "vct.h"

/*--------------------------------------------------------------------*/

#define VCC_KIND(U,l) const struct kind SYM_##U[1] = {{ KIND_MAGIC, #l}};
#include "tbl/symbol_kind.h"

/*--------------------------------------------------------------------*/

struct vcc_namespace {
        unsigned                magic;
#define VCC_NAMESPACE_MAGIC     0x27b842f4
        const char              *name;
        enum vcc_namespace_e    id;
};

#define VCC_NAMESPACE(U, l)                             \
        static const struct vcc_namespace sym_##l = {   \
                VCC_NAMESPACE_MAGIC,                    \
                #l,                                     \
                VCC_NAMESPACE_##U                       \
        };                                              \
        vcc_ns_t SYM_##U = &sym_##l;
#include "vcc_namespace.h"

/*--------------------------------------------------------------------*/

struct symtab {
        unsigned                        magic;
#define SYMTAB_MAGIC                    0x084d9c8a
        unsigned                        nlen;
        const char                      *name;
        const struct symtab             *parent;
        VTAILQ_ENTRY(symtab)            list;
        VTAILQ_HEAD(,symtab)            children;
        VTAILQ_HEAD(,symbol)            symbols;
};

vcc_kind_t
VCC_HandleKind(vcc_type_t fmt)
{
        if (fmt == ACL)         return (SYM_ACL);
        if (fmt == BACKEND)     return (SYM_BACKEND);
        if (fmt == PROBE)       return (SYM_PROBE);
        if (fmt == STEVEDORE)   return (SYM_STEVEDORE);
        if (fmt == SUB)         return (SYM_SUB);
        if (fmt == INSTANCE)    return (SYM_INSTANCE);
        AZ(fmt->global_pfx);
        return (SYM_NONE);
}

void
VCC_PrintCName(struct vsb *vsb, const char *b, const char *e)
{

        AN(vsb);
        AN(b);

        if (e == NULL)
                e = strchr(b, '\0');
        assert(b < e);

        for (; b < e; b++)
                if (vct_isalnum(*b))
                        VSB_putc(vsb, *b);
                else
                        VSB_printf(vsb, "_%02x_", *b);
}

static void
vcc_symtabname(struct vsb *vsb, const struct symtab *st)
{
        if (st->parent != NULL && st->parent->parent != NULL) {
                vcc_symtabname(vsb, st->parent);
                VSB_putc(vsb, '.');
        }
        VSB_cat(vsb, st->name);
}

void
VCC_SymName(struct vsb *vsb, const struct symbol *sym)
{
        AN(vsb);
        CHECK_OBJ_NOTNULL(sym, SYMBOL_MAGIC);
        CHECK_OBJ_NOTNULL(sym->symtab, SYMTAB_MAGIC);
        vcc_symtabname(vsb, sym->symtab);
}

static struct symtab *
vcc_symtab_new(const char *name)
{
        struct symtab *st;

        ALLOC_OBJ(st, SYMTAB_MAGIC);
        AN(st);
        st->name = name;
        st->nlen = strlen(st->name);
        VTAILQ_INIT(&st->children);
        VTAILQ_INIT(&st->symbols);
        return (st);
}

static struct symtab *
vcc_symtab_str(struct symtab *st, const char *b, const char *e, unsigned tok)
{
        struct symtab *st2, *st3;
        size_t l;
        int i;
        const char *q;

        assert(tok == ID || tok == CSTR);
        if (e == NULL)
                e = strchr(b, '\0');
        q = e;

        while (b < e) {
                if (tok == ID) {
                        for (q = b; q < e && *q != '.'; q++)
                                continue;
                }
                l = pdiff(b, q);
                VTAILQ_FOREACH(st2, &st->children, list) {
                        i = strncasecmp(st2->name, b, l);
                        if (i < 0)
                                continue;
                        if (i == 0 && l == st2->nlen)
                                break;
                        st3 = vcc_symtab_new(vcc_Dup_be(b, q));
                        st3->parent = st;
                        VTAILQ_INSERT_BEFORE(st2, st3, list);
                        st2 = st3;
                        break;
                }
                if (st2 == NULL) {
                        st2 = vcc_symtab_new(vcc_Dup_be(b, q));
                        st2->parent = st;
                        VTAILQ_INSERT_TAIL(&st->children, st2, list);
                }
                st = st2;
                b = q + 1;
        }
        return (st);
}

static struct symbol *
vcc_new_symbol(struct vcc *tl, struct symtab *st,
    vcc_kind_t kind, int vlo, int vhi)
{
        struct symbol *sym;

        sym = TlAlloc(tl, sizeof *sym);
        INIT_OBJ(sym, SYMBOL_MAGIC);
        AN(sym);
        sym->name = st->name;
        sym->symtab = st;
        sym->kind = kind;
        sym->type = VOID;
        sym->lorev = vlo;
        sym->hirev = vhi;
        VTAILQ_INSERT_TAIL(&st->symbols, sym, list);
        return (sym);
}

static struct symbol *
vcc_sym_in_tab(struct vcc *tl, struct symtab *st,
    vcc_kind_t kind, int vlo, int vhi)
{
        const struct symtab *pst;
        struct symbol *sym, *psym;

        VTAILQ_FOREACH(sym, &st->symbols, list) {
                if (sym->lorev > vhi || sym->hirev < vlo)
                        continue;
                if (kind == SYM_NONE && kind == sym->kind &&
                    sym->wildcard == NULL)
                        continue;
                if (tl->syntax < VCL_41 && strcmp(sym->name, "default") &&
                     kind != SYM_NONE && kind != sym->kind &&
                     sym->wildcard == NULL)
                        continue;
                return (sym);
        }
        pst = st->parent;
        if (pst == NULL)
                return (sym);
        psym = VTAILQ_FIRST(&pst->symbols);
        if (psym == NULL)
                return (sym);
        if (psym->wildcard == NULL)
                return (sym);

        sym = vcc_new_symbol(tl, st, kind, vlo, vhi);
        psym->wildcard(tl, psym, sym);
        if (tl->err)
                return (NULL);
        return (sym);
}


const struct symxref XREF_NONE[1] = {{"xref_none"}};
const struct symxref XREF_DEF[1] = {{"xref_def"}};
const struct symxref XREF_REF[1] = {{"xref_ref"}};

const struct symmode SYMTAB_NOERR[1] = {{
        .name = "sym_noerror",
        .noerr = 1
}};

const struct symmode SYMTAB_CREATE[1] = {{
        .name = "sym_create"
}};

const struct symmode SYMTAB_EXISTING[1] = {{
        .name = "Symbol not found"
}};

const struct symmode SYMTAB_PARTIAL[1] = {{
        .name = "Symbol not found",
        .partial = 1
}};

const struct symmode SYMTAB_PARTIAL_NOERR[1] = {{
        .name = "Symbol not found",
        .partial = 1,
        .noerr = 1
}};

struct symbol *
VCC_SymbolGet(struct vcc *tl, vcc_ns_t ns, vcc_kind_t kind,
    const struct symmode *e, const struct symxref *x)
{
        struct symtab *st, *st2 = NULL;
        struct symbol *sym = NULL, *sym2 = NULL;
        struct token *t0, *tn, *tn1, *tn2 = NULL;

        AN(tl);
        CHECK_OBJ_NOTNULL(ns, VCC_NAMESPACE_MAGIC);
        AN(ns->name);
        CHECK_OBJ_NOTNULL(kind, KIND_MAGIC);
        AN(e);
        AN(x);
        AN(x->name);
        if (tl->syntax >= VCL_41 && e == SYMTAB_CREATE && kind != SYM_SUB &&
            vcc_Has_vcl_prefix(tl->t->b)) {
                VSB_cat(tl->sb, "Symbols named 'vcl_*' are reserved.\nAt:");
                vcc_ErrWhere(tl, tl->t);
                return (NULL);
        }

        st = tl->syms[ns->id];
        t0 = tl->t;
        tn = tl->t;
        assert(tn->tok == ID);
        while (1) {
                assert(tn->tok == ID || tn->tok == CSTR);
                if (tn->tok == CSTR && tl->syntax < VCL_41) {
                        VSB_cat(tl->sb,
                            "Quoted headers are available for VCL >= 4.1.\n"
                            "At:");
                        vcc_ErrWhere(tl, tn);
                        return (NULL);
                }
                if (tn->tok == ID)
                        st = vcc_symtab_str(st, tn->b, tn->e, tn->tok);
                else
                        st = vcc_symtab_str(st, tn->dec, NULL, tn->tok);
                sym2 = vcc_sym_in_tab(tl, st, kind, tl->syntax, tl->syntax);
                if (sym2 != NULL) {
                        sym = sym2;
                        st2 = st;
                        tn2 = tn;
                }
                tn1 = vcc_PeekTokenFrom(tl, tn);
                if (tn1->tok != '.')
                        break;
                tn1 = vcc_PeekTokenFrom(tl, tn1);
                if (tn1->tok == CSTR && (sym == NULL || sym->wildcard == NULL))
                        break;
                if (tn1->tok != CSTR && tn1->tok != ID)
                        break;
                tn = tn1;
        }
        if (sym != NULL && sym->kind == SYM_ALIAS) {
                assert(ns == SYM_MAIN);
                st = vcc_symtab_str(tl->syms[ns->id], sym->eval_priv, NULL, ID);
                AN(st);
                st2 = st;
                sym = vcc_sym_in_tab(tl, st, SYM_NONE, sym->lorev, sym->hirev);
                AN(sym);
        }
        if (sym != NULL && sym->kind == SYM_VMOD && e->partial)
                e = SYMTAB_EXISTING;
        if (sym != NULL && e->partial) {
                st = st2;
                tn = tn2;
        } else if (st != st2) {
                sym = NULL;
        }
        if (tl->err || (sym == NULL && e->noerr))
                return (sym);
        AN(st);
        AN(tn);
        if (sym == NULL && e == SYMTAB_CREATE)
                sym = vcc_new_symbol(tl, st, kind, tl->syntax, tl->syntax);
        tl->t = vcc_PeekTokenFrom(tl, tn);
        if (tl->err)
                return (NULL);
        if (sym == NULL) {
                VSB_printf(tl->sb, "%s: '", e->name);
                vcc_PrintTokens(tl, t0, tl->t);
                VSB_cat(tl->sb, "'");
                sym = vcc_sym_in_tab(tl, st, kind, VCL_LOW, VCL_HIGH);
                if (sym != NULL && sym->kind != SYM_OBJECT &&
                    sym->kind != SYM_INSTANCE) { /* XXX: too specific */
                        VSB_cat(tl->sb, " (Only available when");
                        if (sym->lorev >= VCL_LOW)
                                VSB_printf(tl->sb, " %.1f <=", .1 * sym->lorev);
                        VSB_cat(tl->sb, " VCL syntax");
                        if (sym->hirev <= VCL_HIGH)
                                VSB_printf(tl->sb, " <= %.1f", .1 * sym->hirev);
                        VSB_cat(tl->sb, ")");
                }
                VSB_cat(tl->sb, "\nAt: ");
                vcc_ErrWhere2(tl, t0, tl->t);
                return (NULL);
        }
        if (kind != SYM_NONE && kind != sym->kind && sym->type != DEFAULT) {
                VSB_cat(tl->sb, "Symbol '");
                vcc_PrintTokens(tl, t0, tl->t);
                VSB_printf(tl->sb, "' has wrong type (%s), expected %s:",
                    sym->kind->name, kind->name);
                VSB_cat(tl->sb, "\nAt: ");
                vcc_ErrWhere2(tl, t0, tl->t);
                if (sym->def_b != NULL) {
                        VSB_cat(tl->sb, "Symbol was defined here: ");
                        vcc_ErrWhere(tl, sym->def_b);
                } else if (sym->ref_b != NULL) {
                        VSB_cat(tl->sb, "Symbol was declared here: ");
                        vcc_ErrWhere(tl, sym->ref_b);
                } else {
                        VSB_cat(tl->sb, "Symbol was builtin\n");
                }
                return (NULL);
        }
        if (x == XREF_DEF) {
                if (sym->def_b == NULL)
                        sym->def_b = t0;
                sym->ndef++;
        } else if (x == XREF_REF) {
                if (sym->ref_b == NULL)
                        sym->ref_b = t0;
                sym->nref++;
        } else {
                assert (x == XREF_NONE);
        }
        return (sym);
}

static struct symbol *
vcc_TypeSymbol(struct vcc *tl, vcc_ns_t ns, vcc_kind_t kind, vcc_type_t type)
{
        struct token t[1], *t0;
        struct symbol *sym;
        struct vsb *buf;

        buf = VSB_new_auto();
        AN(buf);
        VSB_printf(buf, "%s.%.*s", type->name, PF(tl->t));
        AZ(VSB_finish(buf));

        /* NB: we create a fake token but errors are handled by the caller. */
        memcpy(t, tl->t, sizeof *t);
        t->b = VSB_data(buf);
        t->e = t->b + VSB_len(buf);

        t0 = tl->t;
        tl->t = t;
        sym = VCC_SymbolGet(tl, ns, kind, SYMTAB_NOERR, XREF_NONE);
        tl->t = t0;
        VSB_destroy(&buf);

        return (sym);
}

struct symbol *
VCC_TypeSymbol(struct vcc *tl, vcc_kind_t kind, vcc_type_t type)
{

        if (strchr(type->name, '.') == NULL)
                return (vcc_TypeSymbol(tl, SYM_TYPE, kind, type));

        /* NB: type imported from a VMOD */
        return (vcc_TypeSymbol(tl, SYM_MAIN, kind, type));
}

struct symbol *
VCC_MkSym(struct vcc *tl, const char *b, vcc_ns_t ns, vcc_kind_t kind,
    int vlo, int vhi)
{
        struct symtab *st;
        struct symbol *sym;
        const struct symbol *parent;

        AN(tl);
        AN(b);
        CHECK_OBJ_NOTNULL(ns, VCC_NAMESPACE_MAGIC);
        CHECK_OBJ_NOTNULL(kind, KIND_MAGIC);
        assert(vlo <= vhi);

        if (tl->syms[ns->id] == NULL)
                tl->syms[ns->id] = vcc_symtab_new("");
        st = vcc_symtab_str(tl->syms[ns->id], b, NULL, ID);
        AN(st);
        sym = vcc_sym_in_tab(tl, st, kind, vlo, vhi);
        if (sym != NULL) {
                assert(sym->kind == SYM_VAR);
                parent = sym->eval_priv;
                AN(parent);
                AN(parent->wildcard);
                assert(sym->type == parent->type);
                return (sym);
        }
        AZ(sym);
        sym = vcc_new_symbol(tl, st, kind, vlo, vhi);
        AN(sym);
        sym->noref = 1;
        return (sym);
}

struct symbol *
VCC_MkSymAlias(struct vcc *tl, const char *alias, const char *name)
{
        struct symbol *sym_alias, *sym;
        struct symtab *st;

        AN(tl);
        AN(alias);
        AN(name);

        st = vcc_symtab_str(tl->syms[SYM_MAIN->id], name, NULL, ID);
        AN(st);
        sym = vcc_sym_in_tab(tl, st, SYM_NONE, VCL_LOW, VCL_HIGH);
        AN(sym);
        assert(sym->kind != SYM_ALIAS);
        sym_alias = VCC_MkSym(tl, alias, SYM_MAIN, SYM_ALIAS, sym->lorev,
            sym->hirev);
        AN(sym_alias);
        sym_alias->eval_priv = strdup(name);
        AN(sym_alias->eval_priv);
        return (sym);
}

static void
vcc_walksymbols(struct vcc *tl, const struct symtab *root,
    symwalk_f *func, vcc_kind_t kind)
{
        struct symbol *sym;
        struct symtab *st1, *st2 = NULL;

        VTAILQ_FOREACH(sym, &root->symbols, list) {
                if (kind == SYM_NONE || kind == sym->kind)
                        func(tl, sym);
                ERRCHK(tl);
        }
        VTAILQ_FOREACH(st1, &root->children, list) {
                if (st2 != NULL)
                        assert(strcasecmp(st1->name, st2->name) >= 0);
                st2 = st1;
                vcc_walksymbols(tl, st1, func, kind);
                ERRCHK(tl);
        }
}

void
VCC_WalkSymbols(struct vcc *tl, symwalk_f *func, vcc_ns_t ns, vcc_kind_t kind)
{

        CHECK_OBJ_NOTNULL(ns, VCC_NAMESPACE_MAGIC);
        vcc_walksymbols(tl, tl->syms[ns->id], func, kind);
}

void
VCC_GlobalSymbol(struct symbol *sym, vcc_type_t type)
{
        vcc_kind_t kind;
        struct vsb *vsb;

        CHECK_OBJ_NOTNULL(sym, SYMBOL_MAGIC);
        AN(type);
        AN(type->global_pfx);

        kind = VCC_HandleKind(type);

        if (sym->lname != NULL) {
                AN(sym->rname);
                assert(sym->type == type);
                assert(sym->kind == kind);
                return;
        }

        vsb = VSB_new_auto();
        AN(vsb);
        VSB_printf(vsb, "%s_", type->global_pfx);
        VCC_PrintCName(vsb, sym->name, NULL);
        AZ(VSB_finish(vsb));
        sym->lname = strdup(VSB_data(vsb));
        AN(sym->lname);
        if (type == SUB) {
                VSB_clear(vsb);
                VSB_printf(vsb, "sub_%s", sym->lname);
                AZ(VSB_finish(vsb));
        }
        sym->rname = strdup(VSB_data(vsb));
        AN(sym->rname);
        VSB_destroy(&vsb);

        sym->type = type;
        sym->kind = kind;
        if (sym->kind != SYM_NONE) {
                AZ(VCT_invalid_name(sym->rname, NULL));
                if (type == SUB)
                        sym->eval = vcc_Eval_Sub;
                else
                        sym->eval = vcc_Eval_Handle;
        } else {
                WRONG("Wrong kind of global symbol");
        }

#define VCL_MET_MAC(l,u,t,b)   sym->r_methods |= VCL_MET_##u;
#include "tbl/vcl_returns.h"
}

struct symbol *
VCC_HandleSymbol(struct vcc *tl, vcc_type_t fmt)
{
        struct symbol *sym;
        vcc_kind_t kind;
        struct token *t;
        const char *p;

        if (vcc_IdIs(tl->t, "default") && fmt->default_sym != NULL) {
                vcc_NextToken(tl);
                return (fmt->default_sym);
        }

        kind = VCC_HandleKind(fmt);
        assert(kind != SYM_NONE);

        t = tl->t;
        sym = VCC_SymbolGet(tl, SYM_MAIN, SYM_NONE, SYMTAB_NOERR, XREF_NONE);
        if (sym != NULL && sym->def_b != NULL && kind == sym->kind) {
                p = sym->kind->name;
                VSB_printf(tl->sb, "%c%s '%.*s' redefined.\n",
                    toupper(*p), p + 1, PF(t));
                vcc_ErrWhere(tl, t);
                VSB_cat(tl->sb, "First definition:\n");
                AN(sym->def_b);
                vcc_ErrWhere(tl, sym->def_b);
                return (sym);
        } else if (sym != NULL && sym->def_b != NULL) {
                VSB_printf(tl->sb, "Name '%.*s' already defined.\n", PF(t));
                vcc_ErrWhere(tl, t);
                VSB_cat(tl->sb, "First definition:\n");
                AN(sym->def_b);
                vcc_ErrWhere(tl, sym->def_b);
                return (sym);
        } else if (sym != NULL && sym->kind != kind) {
                VSB_printf(tl->sb,
                    "Name %.*s must have type '%s'.\n",
                    PF(t), sym->kind->name);
                vcc_ErrWhere(tl, t);
                return (sym);
        }
        if (sym == NULL)
                sym = VCC_SymbolGet(tl, SYM_MAIN, kind, SYMTAB_CREATE,
                    XREF_NONE);
        if (sym == NULL)
                return (NULL);
        AN(sym);
        AZ(sym->ndef);
        VCC_GlobalSymbol(sym, fmt);
        sym->ndef = 1;
        if (sym->def_b == NULL)
                sym->def_b = t;
        return (sym);
}
/*lint -restore */

		varnish-cache/lib/libvcc/vcc_symb.c
0		/*-
1		* Copyright (c) 2010 Varnish Software AS
2		* All rights reserved.
3		*
4		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
5		*
6		* SPDX-License-Identifier: BSD-2-Clause
7		*
8		* Redistribution and use in source and binary forms, with or without
9		* modification, are permitted provided that the following conditions
10		* are met:
11		* 1. Redistributions of source code must retain the above copyright
12		* notice, this list of conditions and the following disclaimer.
13		* 2. Redistributions in binary form must reproduce the above copyright
14		* notice, this list of conditions and the following disclaimer in the
15		* documentation and/or other materials provided with the distribution.
16		*
17		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27		* SUCH DAMAGE.
28		*/
29		/lint -save -esym(759, SYMTAB_NOERR) -esym(765, SYMTAB_NOERR)/
30
31		#include "config.h"
32
33		#include <ctype.h>
34		#include <stdlib.h>
35		#include <string.h>
36
37		#include "vcc_compile.h"
38
39		#include "vct.h"
40
41		/--------------------------------------------------------------------/
42
43		#define VCC_KIND(U,l) const struct kind SYM_##U[1] = {{ KIND_MAGIC, #l}};
44		#include "tbl/symbol_kind.h"
45
46		/--------------------------------------------------------------------/
47
48		struct vcc_namespace {
49		unsigned magic;
50		#define VCC_NAMESPACE_MAGIC 0x27b842f4
51		const char *name;
52		enum vcc_namespace_e id;
53		};
54
55		#define VCC_NAMESPACE(U, l) \
56		static const struct vcc_namespace sym_##l = { \
57		VCC_NAMESPACE_MAGIC, \
58		#l, \
59		VCC_NAMESPACE_##U \
60		}; \
61		vcc_ns_t SYM_##U = &sym_##l;
62		#include "vcc_namespace.h"
63
64		/--------------------------------------------------------------------/
65
66		struct symtab {
67		unsigned magic;
68		#define SYMTAB_MAGIC 0x084d9c8a
69		unsigned nlen;
70		const char *name;
71		const struct symtab *parent;
72		VTAILQ_ENTRY(symtab) list;
73		VTAILQ_HEAD(,symtab) children;
74		VTAILQ_HEAD(,symbol) symbols;
75		};
76
77		vcc_kind_t
78	3910023	VCC_HandleKind(vcc_type_t fmt)
79		{
80	3910023	if (fmt == ACL) return (SYM_ACL);
81	3908022	if (fmt == BACKEND) return (SYM_BACKEND);
82	3835296	if (fmt == PROBE) return (SYM_PROBE);
83	3834767	if (fmt == STEVEDORE) return (SYM_STEVEDORE);
84	3834767	if (fmt == SUB) return (SYM_SUB);
85	9430	if (fmt == INSTANCE) return (SYM_INSTANCE);
86	0	AZ(fmt->global_pfx);
87	0	return (SYM_NONE);
88	3910023	}
89
90		void
91	2848826	VCC_PrintCName(struct vsb vsb, const char b, const char *e)
92		{
93
94	2848826	AN(vsb);
95	2848826	AN(b);
96
97	2848826	if (e == NULL)
98	2848826	e = strchr(b, '\0');
99	2848826	assert(b < e);
100
101	45151668	for (; b < e; b++)
102	84605684	if (vct_isalnum(*b))
103	38173537	VSB_putc(vsb, *b);
104		else
105	4129305	VSB_printf(vsb, "_%02x_", *b);
106	2848826	}
107
108		static void
109	12120678	vcc_symtabname(struct vsb vsb, const struct symtab st)
110		{
111	12120678	if (st->parent != NULL && st->parent->parent != NULL) {
112	5300235	vcc_symtabname(vsb, st->parent);
113	5300235	VSB_putc(vsb, '.');
114	5300235	}
115	12120678	VSB_cat(vsb, st->name);
116	12120678	}
117
118		void
119	6820443	VCC_SymName(struct vsb vsb, const struct symbol sym)
120		{
121	6820443	AN(vsb);
122	6820443	CHECK_OBJ_NOTNULL(sym, SYMBOL_MAGIC);
123	6820443	CHECK_OBJ_NOTNULL(sym->symtab, SYMTAB_MAGIC);
124	6820443	vcc_symtabname(vsb, sym->symtab);
125	6820443	}
126
127		static struct symtab *
128	15046232	vcc_symtab_new(const char *name)
129		{
130		struct symtab *st;
131
132	15046232	ALLOC_OBJ(st, SYMTAB_MAGIC);
133	15046232	AN(st);
134	15046232	st->name = name;
135	15046232	st->nlen = strlen(st->name);
136	15046232	VTAILQ_INIT(&st->children);
137	15046232	VTAILQ_INIT(&st->symbols);
138	15046232	return (st);
139		}
140
141		static struct symtab *
142	32853683	vcc_symtab_str(struct symtab st, const char b, const char *e, unsigned tok)
143		{
144		struct symtab st2, st3;
145		size_t l;
146		int i;
147		const char *q;
148
149	32853683	assert(tok == ID \|\| tok == CSTR);
150	32853683	if (e == NULL)
151	12288624	e = strchr(b, '\0');
152	32853683	q = e;
153
154	75965297	while (b < e) {
155	43111614	if (tok == ID) {
156	355663329	for (q = b; q < e && *q != '.'; q++)
157	312551945	continue;
158	43111384	}
159	43111614	l = pdiff(b, q);
160	681688053	VTAILQ_FOREACH(st2, &st->children, list) {
161	671828643	i = strncasecmp(st2->name, b, l);
162	671828643	if (i < 0)
163	638576439	continue;
164	33252204	if (i == 0 && l == st2->nlen)
165	28205475	break;
166	5046729	st3 = vcc_symtab_new(vcc_Dup_be(b, q));
167	5046729	st3->parent = st;
168	5046729	VTAILQ_INSERT_BEFORE(st2, st3, list);
169	5046729	st2 = st3;
170	5046729	break;
171		}
172	43111614	if (st2 == NULL) {
173	9859410	st2 = vcc_symtab_new(vcc_Dup_be(b, q));
174	9859410	st2->parent = st;
175	9859410	VTAILQ_INSERT_TAIL(&st->children, st2, list);
176	9859410	}
177	43111614	st = st2;
178	43111614	b = q + 1;
179		}
180	32853683	return (st);
181		}
182
183		static struct symbol *
184	14586646	vcc_new_symbol(struct vcc tl, struct symtab st,
185		vcc_kind_t kind, int vlo, int vhi)
186		{
187		struct symbol *sym;
188
189	14586646	sym = TlAlloc(tl, sizeof *sym);
190	14586646	INIT_OBJ(sym, SYMBOL_MAGIC);
191	14586646	AN(sym);
192	14586646	sym->name = st->name;
193	14586646	sym->symtab = st;
194	14586646	sym->kind = kind;
195	14586646	sym->type = VOID;
196	14586646	sym->lorev = vlo;
197	14586646	sym->hirev = vhi;
198	14586646	VTAILQ_INSERT_TAIL(&st->symbols, sym, list);
199	14586646	return (sym);
200		}
201
202		static struct symbol *
203	32854281	vcc_sym_in_tab(struct vcc tl, struct symtab st,
204		vcc_kind_t kind, int vlo, int vhi)
205		{
206		const struct symtab *pst;
207		struct symbol sym, psym;
208
209	33163815	VTAILQ_FOREACH(sym, &st->symbols, list) {
210	16948194	if (sym->lorev > vhi \|\| sym->hirev < vlo)
211	309350	continue;
212	16638844	if (kind == SYM_NONE && kind == sym->kind &&
213	799342	sym->wildcard == NULL)
214	0	continue;
215	16856355	if (tl->syntax < VCL_41 && strcmp(sym->name, "default") &&
216	9454771	kind != SYM_NONE && kind != sym->kind &&
217	217511	sym->wildcard == NULL)
218	184	continue;
219	16638660	return (sym);
220		}
221	16215621	pst = st->parent;
222	16215621	if (pst == NULL)
223	0	return (sym);
224	16215621	psym = VTAILQ_FIRST(&pst->symbols);
225	16215621	if (psym == NULL)
226	8271375	return (sym);
227	7944246	if (psym->wildcard == NULL)
228	6561440	return (sym);
229
230	1382806	sym = vcc_new_symbol(tl, st, kind, vlo, vhi);
231	1382806	psym->wildcard(tl, psym, sym);
232	1382806	if (tl->err)
233	46	return (NULL);
234	1382760	return (sym);
235	32854281	}
236
237
238		const struct symxref XREF_NONE[1] = {{"xref_none"}};
239		const struct symxref XREF_DEF[1] = {{"xref_def"}};
240		const struct symxref XREF_REF[1] = {{"xref_ref"}};
241
242		const struct symmode SYMTAB_NOERR[1] = {{
243		.name = "sym_noerror",
244		.noerr = 1
245		}};
246
247		const struct symmode SYMTAB_CREATE[1] = {{
248		.name = "sym_create"
249		}};
250
251		const struct symmode SYMTAB_EXISTING[1] = {{
252		.name = "Symbol not found"
253		}};
254
255		const struct symmode SYMTAB_PARTIAL[1] = {{
256		.name = "Symbol not found",
257		.partial = 1
258		}};
259
260		const struct symmode SYMTAB_PARTIAL_NOERR[1] = {{
261		.name = "Symbol not found",
262		.partial = 1,
263		.noerr = 1
264		}};
265
266		struct symbol *
267	15527898	VCC_SymbolGet(struct vcc *tl, vcc_ns_t ns, vcc_kind_t kind,
268		const struct symmode e, const struct symxref x)
269		{
270	15527898	struct symtab st, st2 = NULL;
271	15527898	struct symbol sym = NULL, sym2 = NULL;
272	15527898	struct token t0, tn, tn1, tn2 = NULL;
273
274	15527898	AN(tl);
275	15527898	CHECK_OBJ_NOTNULL(ns, VCC_NAMESPACE_MAGIC);
276	15527898	AN(ns->name);
277	15527898	CHECK_OBJ_NOTNULL(kind, KIND_MAGIC);
278	15527898	AN(e);
279	15527898	AN(x);
280	15527898	AN(x->name);
281	15527898	if (tl->syntax >= VCL_41 && e == SYMTAB_CREATE && kind != SYM_SUB &&
282	54671	vcc_Has_vcl_prefix(tl->t->b)) {
283	46	VSB_cat(tl->sb, "Symbols named 'vcl_*' are reserved.\nAt:");
284	46	vcc_ErrWhere(tl, tl->t);
285	46	return (NULL);
286		}
287
288	15527852	st = tl->syms[ns->id];
289	15527852	t0 = tl->t;
290	15527852	tn = tl->t;
291	15527852	assert(tn->tok == ID);
292	20565312	while (1) {
293	20565312	assert(tn->tok == ID \|\| tn->tok == CSTR);
294	20565312	if (tn->tok == CSTR && tl->syntax < VCL_41) {
295	23	VSB_cat(tl->sb,
296		"Quoted headers are available for VCL >= 4.1.\n"
297		"At:");
298	23	vcc_ErrWhere(tl, tn);
299	23	return (NULL);
300		}
301	20565289	if (tn->tok == ID)
302	20565059	st = vcc_symtab_str(st, tn->b, tn->e, tn->tok);
303		else
304	230	st = vcc_symtab_str(st, tn->dec, NULL, tn->tok);
305	20565289	sym2 = vcc_sym_in_tab(tl, st, kind, tl->syntax, tl->syntax);
306	20565289	if (sym2 != NULL) {
307	17457621	sym = sym2;
308	17457621	st2 = st;
309	17457621	tn2 = tn;
310	17457621	}
311	20565289	tn1 = vcc_PeekTokenFrom(tl, tn);
312	20565289	if (tn1->tok != '.')
313	15527783	break;
314	5037506	tn1 = vcc_PeekTokenFrom(tl, tn1);
315	5037506	if (tn1->tok == CSTR && (sym == NULL \|\| sym->wildcard == NULL))
316	23	break;
317	5037483	if (tn1->tok != CSTR && tn1->tok != ID)
318	23	break;
319	5037460	tn = tn1;
320		}
321	15527829	if (sym != NULL && sym->kind == SYM_ALIAS) {
322	46	assert(ns == SYM_MAIN);
323	46	st = vcc_symtab_str(tl->syms[ns->id], sym->eval_priv, NULL, ID);
324	46	AN(st);
325	46	st2 = st;
326	46	sym = vcc_sym_in_tab(tl, st, SYM_NONE, sym->lorev, sym->hirev);
327	46	AN(sym);
328	46	}
329	15527829	if (sym != NULL && sym->kind == SYM_VMOD && e->partial)
330	23	e = SYMTAB_EXISTING;
331	15527829	if (sym != NULL && e->partial) {
332	8253021	st = st2;
333	8253021	tn = tn2;
334	15527829	} else if (st != st2) {
335	2945564	sym = NULL;
336	2945564	}
337	15527829	if (tl->err \|\| (sym == NULL && e->noerr))
338	1465951	return (sym);
339	14061878	AN(st);
340	14061878	AN(tn);
341	14061878	if (sym == NULL && e == SYMTAB_CREATE)
342	1479015	sym = vcc_new_symbol(tl, st, kind, tl->syntax, tl->syntax);
343	14061878	tl->t = vcc_PeekTokenFrom(tl, tn);
344	14061878	if (tl->err)
345	0	return (NULL);
346	14061878	if (sym == NULL) {
347	598	VSB_printf(tl->sb, "%s: '", e->name);
348	598	vcc_PrintTokens(tl, t0, tl->t);
349	598	VSB_cat(tl->sb, "'");
350	598	sym = vcc_sym_in_tab(tl, st, kind, VCL_LOW, VCL_HIGH);
351	598	if (sym != NULL && sym->kind != SYM_OBJECT &&
352	230	sym->kind != SYM_INSTANCE) { /* XXX: too specific */
353	230	VSB_cat(tl->sb, " (Only available when");
354	230	if (sym->lorev >= VCL_LOW)
355	184	VSB_printf(tl->sb, " %.1f <=", .1 * sym->lorev);
356	230	VSB_cat(tl->sb, " VCL syntax");
357	230	if (sym->hirev <= VCL_HIGH)
358	46	VSB_printf(tl->sb, " <= %.1f", .1 * sym->hirev);
359	230	VSB_cat(tl->sb, ")");
360	230	}
361	598	VSB_cat(tl->sb, "\nAt: ");
362	598	vcc_ErrWhere2(tl, t0, tl->t);
363	598	return (NULL);
364		}
365	14061280	if (kind != SYM_NONE && kind != sym->kind && sym->type != DEFAULT) {
366	69	VSB_cat(tl->sb, "Symbol '");
367	69	vcc_PrintTokens(tl, t0, tl->t);
368	138	VSB_printf(tl->sb, "' has wrong type (%s), expected %s:",
369	69	sym->kind->name, kind->name);
370	69	VSB_cat(tl->sb, "\nAt: ");
371	69	vcc_ErrWhere2(tl, t0, tl->t);
372	69	if (sym->def_b != NULL) {
373	46	VSB_cat(tl->sb, "Symbol was defined here: ");
374	46	vcc_ErrWhere(tl, sym->def_b);
375	69	} else if (sym->ref_b != NULL) {
376	23	VSB_cat(tl->sb, "Symbol was declared here: ");
377	23	vcc_ErrWhere(tl, sym->ref_b);
378	23	} else {
379	0	VSB_cat(tl->sb, "Symbol was builtin\n");
380		}
381	69	return (NULL);
382		}
383	14061211	if (x == XREF_DEF) {
384	2364492	if (sym->def_b == NULL)
385	2330429	sym->def_b = t0;
386	2364492	sym->ndef++;
387	14061211	} else if (x == XREF_REF) {
388	4640802	if (sym->ref_b == NULL)
389	2886017	sym->ref_b = t0;
390	4640802	sym->nref++;
391	4640802	} else {
392	7055917	assert (x == XREF_NONE);
393		}
394	14061211	return (sym);
395	15527898	}
396
397		static struct symbol *
398	82915	vcc_TypeSymbol(struct vcc *tl, vcc_ns_t ns, vcc_kind_t kind, vcc_type_t type)
399		{
400		struct token t[1], *t0;
401		struct symbol *sym;
402		struct vsb *buf;
403
404	82915	buf = VSB_new_auto();
405	82915	AN(buf);
406	82915	VSB_printf(buf, "%s.%.*s", type->name, PF(tl->t));
407	82915	AZ(VSB_finish(buf));
408
409		/* NB: we create a fake token but errors are handled by the caller. */
410	82915	memcpy(t, tl->t, sizeof *t);
411	82915	t->b = VSB_data(buf);
412	82915	t->e = t->b + VSB_len(buf);
413
414	82915	t0 = tl->t;
415	82915	tl->t = t;
416	82915	sym = VCC_SymbolGet(tl, ns, kind, SYMTAB_NOERR, XREF_NONE);
417	82915	tl->t = t0;
418	82915	VSB_destroy(&buf);
419
420	82915	return (sym);
421		}
422
423		struct symbol *
424	82915	VCC_TypeSymbol(struct vcc *tl, vcc_kind_t kind, vcc_type_t type)
425		{
426
427	82915	if (strchr(type->name, '.') == NULL)
428	65159	return (vcc_TypeSymbol(tl, SYM_TYPE, kind, type));
429
430		/* NB: type imported from a VMOD */
431	17756	return (vcc_TypeSymbol(tl, SYM_MAIN, kind, type));
432	82915	}
433
434		struct symbol *
435	12285105	VCC_MkSym(struct vcc tl, const char b, vcc_ns_t ns, vcc_kind_t kind,
436		int vlo, int vhi)
437		{
438		struct symtab *st;
439		struct symbol *sym;
440		const struct symbol *parent;
441
442	12285105	AN(tl);
443	12285105	AN(b);
444	12285105	CHECK_OBJ_NOTNULL(ns, VCC_NAMESPACE_MAGIC);
445	12285105	CHECK_OBJ_NOTNULL(kind, KIND_MAGIC);
446	12285105	assert(vlo <= vhi);
447
448	12285105	if (tl->syms[ns->id] == NULL)
449	140093	tl->syms[ns->id] = vcc_symtab_new("");
450	12285105	st = vcc_symtab_str(tl->syms[ns->id], b, NULL, ID);
451	12285105	AN(st);
452	12285105	sym = vcc_sym_in_tab(tl, st, kind, vlo, vhi);
453	12285105	if (sym != NULL) {
454	560280	assert(sym->kind == SYM_VAR);
455	560280	parent = sym->eval_priv;
456	560280	AN(parent);
457	560280	AN(parent->wildcard);
458	560280	assert(sym->type == parent->type);
459	560280	return (sym);
460		}
461	11724825	AZ(sym);
462	11724825	sym = vcc_new_symbol(tl, st, kind, vlo, vhi);
463	11724825	AN(sym);
464	11724825	sym->noref = 1;
465	11724825	return (sym);
466	12285105	}
467
468		struct symbol *
469	3243	VCC_MkSymAlias(struct vcc tl, const char alias, const char *name)
470		{
471		struct symbol sym_alias, sym;
472		struct symtab *st;
473
474	3243	AN(tl);
475	3243	AN(alias);
476	3243	AN(name);
477
478	3243	st = vcc_symtab_str(tl->syms[SYM_MAIN->id], name, NULL, ID);
479	3243	AN(st);
480	3243	sym = vcc_sym_in_tab(tl, st, SYM_NONE, VCL_LOW, VCL_HIGH);
481	3243	AN(sym);
482	3243	assert(sym->kind != SYM_ALIAS);
483	6486	sym_alias = VCC_MkSym(tl, alias, SYM_MAIN, SYM_ALIAS, sym->lorev,
484	3243	sym->hirev);
485	3243	AN(sym_alias);
486	3243	sym_alias->eval_priv = strdup(name);
487	3243	AN(sym_alias->eval_priv);
488	3243	return (sym);
489		}
490
491		static void
492	72397031	vcc_walksymbols(struct vcc tl, const struct symtab root,
493		symwalk_f *func, vcc_kind_t kind)
494		{
495		struct symbol *sym;
496	72397031	struct symtab st1, st2 = NULL;
497
498	142776870	VTAILQ_FOREACH(sym, &root->symbols, list) {
499	70381081	if (kind == SYM_NONE \|\| kind == sym->kind)