GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Martin Blix Grydeland <martin@varnish-software.com>
 *
 * 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.
 *
 */

#include "config.h"

#include <ctype.h>
#include <math.h>
#include <stdio.h>

#include "vdef.h"
#include "vas.h"
#include "miniobj.h"

#include "vbm.h"
#include "vqueue.h"
#include "vre.h"
#include "vsb.h"

#include "vapi/vsl.h"

#include "vsl_api.h"
#include "vxp.h"

static void vxp_expr_or(struct vxp *vxp, struct vex **pvex);

static struct vex *
vex_alloc(const struct vxp *vxp)
{
        struct vex *vex;

        ALLOC_OBJ(vex, VEX_MAGIC);
        AN(vex);
        vex->options = vxp->vex_options;
        return (vex);
}

static void
vxp_expr_lhs(struct vxp *vxp, struct vex_lhs **plhs)
{
        char *p;
        int i;

        AN(plhs);
        AZ(*plhs);
        ALLOC_OBJ(*plhs, VEX_LHS_MAGIC);
        AN(*plhs);
        (*plhs)->tags = vbit_new(SLT__MAX);
        (*plhs)->level = -1;

        if (vxp->t->tok == '{') {
                /* Transaction level limits */
                vxp_NextToken(vxp);
                if (vxp->t->tok != VAL) {
                        VSB_printf(vxp->sb, "Expected integer got '%.*s' ",
                            PF(vxp->t));
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                (*plhs)->level = (int)strtol(vxp->t->dec, &p, 0);
                if ((*plhs)->level < 0) {
                        VSB_cat(vxp->sb, "Expected positive integer ");
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                if (*p == '-') {
                        (*plhs)->level_pm = -1;
                        p++;
                } else if (*p == '+') {
                        (*plhs)->level_pm = 1;
                        p++;
                }
                if (*p) {
                        VSB_cat(vxp->sb, "Syntax error in level limit ");
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                vxp_NextToken(vxp);
                ExpectErr(vxp, '}');
                vxp_NextToken(vxp);
        }

        while (1) {
                /* The tags this expression applies to */
                if (vxp->t->tok == VXID) {
                        (*plhs)->vxid++;
                        i = 0;
                } else if (vxp->t->tok != VAL) {
                        VSB_printf(vxp->sb, "Expected VSL tag name got '%.*s' ",
                            PF(vxp->t));
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                } else {
                        (*plhs)->taglist++;
                        i = VSL_Glob2Tags(vxp->t->dec, -1, vsl_vbm_bitset,
                            (*plhs)->tags);
                }
                if (i == -1) {
                        VSB_cat(vxp->sb, "Tag name matches zero tags ");
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                if (i == -2) {
                        VSB_cat(vxp->sb, "Tag name is ambiguous ");
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                if (i == -3) {
                        VSB_cat(vxp->sb, "Syntax error in tag name ");
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                assert(i > 0 || vxp->t->tok == VXID);
                vxp_NextToken(vxp);
                if (vxp->t->tok != ',')
                        break;
                vxp_NextToken(vxp);
        }

        if (vxp->t->tok == ':') {
                /* Record prefix */
                vxp_NextToken(vxp);
                if (vxp->t->tok != VAL) {
                        VSB_printf(vxp->sb, "Expected string got '%.*s' ",
                            PF(vxp->t));
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                AN(vxp->t->dec);
                (*plhs)->prefix = strdup(vxp->t->dec);
                AN((*plhs)->prefix);
                (*plhs)->prefixlen = strlen((*plhs)->prefix);
                vxp_NextToken(vxp);
        }

        if (vxp->t->tok == '[') {
                /* LHS field [] */
                vxp_NextToken(vxp);
                if (vxp->t->tok != VAL) {
                        VSB_printf(vxp->sb, "Expected integer got '%.*s' ",
                            PF(vxp->t));
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                (*plhs)->field = (int)strtol(vxp->t->dec, &p, 0);
                if (*p || (*plhs)->field <= 0) {
                        VSB_cat(vxp->sb, "Expected positive integer ");
                        vxp_ErrWhere(vxp, vxp->t, -1);
                        return;
                }
                vxp_NextToken(vxp);
                ExpectErr(vxp, ']');
                vxp_NextToken(vxp);
        }

        if ((*plhs)->vxid == 0)
                return;

        if ((*plhs)->vxid > 1 || (*plhs)->level >= 0 ||
            (*plhs)->field > 0 || (*plhs)->prefixlen > 0 ||
            (*plhs)->taglist > 0) {
                VSB_cat(vxp->sb, "Unexpected taglist selection for vxid ");
                vxp_ErrWhere(vxp, vxp->t, -1);
        }
}

static void
vxp_expr_num(struct vxp *vxp, struct vex_rhs **prhs, unsigned vxid)
{
        char *endptr;

        AN(prhs);
        AZ(*prhs);
        if (vxp->t->tok != VAL) {
                VSB_printf(vxp->sb, "Expected number got '%.*s' ", PF(vxp->t));
                vxp_ErrWhere(vxp, vxp->t, -1);
                return;
        }
        AN(vxp->t->dec);
        ALLOC_OBJ(*prhs, VEX_RHS_MAGIC);
        AN(*prhs);
        endptr = NULL;
        if (strchr(vxp->t->dec, '.')) {
                (*prhs)->type = VEX_FLOAT;
                (*prhs)->val_float = strtod(vxp->t->dec, &endptr);
        } else {
                (*prhs)->type = VEX_INT;
                (*prhs)->val_int = strtoll(vxp->t->dec, &endptr, 0);
        }
        while (isspace(*endptr))
                endptr++;
        if (*endptr != '\0') {
                VSB_printf(vxp->sb, "%s parse error ",
                    (*prhs)->type == VEX_FLOAT ? "Floating point" : "Integer");
                vxp_ErrWhere(vxp, vxp->t, -1);
                return;
        }
        if (vxid && (*prhs)->type != VEX_INT) {
                VSB_printf(vxp->sb, "Expected integer got '%.*s' ",
                    PF(vxp->t));
                vxp_ErrWhere(vxp, vxp->t, 0);
                return;
        }
        vxp_NextToken(vxp);
}

static void
vxp_expr_str(struct vxp *vxp, struct vex_rhs **prhs)
{

        AN(prhs);
        AZ(*prhs);
        if (vxp->t->tok != VAL) {
                VSB_printf(vxp->sb, "Expected string got '%.*s' ", PF(vxp->t));
                vxp_ErrWhere(vxp, vxp->t, -1);
                return;
        }
        AN(vxp->t->dec);
        ALLOC_OBJ(*prhs, VEX_RHS_MAGIC);
        AN(*prhs);
        (*prhs)->type = VEX_STRING;
        (*prhs)->val_string = strdup(vxp->t->dec);
        AN((*prhs)->val_string);
        (*prhs)->val_stringlen = strlen((*prhs)->val_string);
        vxp_NextToken(vxp);
}

static void
vxp_expr_regex(struct vxp *vxp, struct vex_rhs **prhs)
{
        int err, erroff;

        /* XXX: Caseless option */

        AN(prhs);
        AZ(*prhs);
        if (vxp->t->tok != VAL) {
                VSB_printf(vxp->sb, "Expected regular expression got '%.*s' ",
                    PF(vxp->t));
                vxp_ErrWhere(vxp, vxp->t, -1);
                return;
        }
        AN(vxp->t->dec);
        ALLOC_OBJ(*prhs, VEX_RHS_MAGIC);
        AN(*prhs);
        (*prhs)->type = VEX_REGEX;
        (*prhs)->val_string = strdup(vxp->t->dec);
        (*prhs)->val_regex = VRE_compile(vxp->t->dec, vxp->vre_options,
            &err, &erroff, 1);
        if ((*prhs)->val_regex == NULL) {
                VSB_cat(vxp->sb, "Regular expression error: ");
                AZ(VRE_error(vxp->sb, err));
                VSB_putc(vxp->sb, ' ');
                vxp_ErrWhere(vxp, vxp->t, erroff);
                return;
        }
        vxp_NextToken(vxp);
}

static void
vxp_vxid_cmp(struct vxp *vxp)
{

        switch (vxp->t->tok) {
        /* Valid operators */
        case T_EQ:              /* == */
        case '<':               /* < */
        case '>':               /* > */
        case T_GEQ:             /* >= */
        case T_LEQ:             /* <= */
        case T_NEQ:             /* != */
                break;

        /* Error */
        default:
                VSB_printf(vxp->sb, "Expected vxid operator got '%.*s' ",
                    PF(vxp->t));
                vxp_ErrWhere(vxp, vxp->t, -1);
        }
}

/*
 * SYNTAX:
 *   expr_cmp:
 *     lhs
 *     lhs <operator> num|str|regex
 */

static void
vxp_expr_cmp(struct vxp *vxp, struct vex **pvex)
{

        AN(pvex);
        AZ(*pvex);
        *pvex = vex_alloc(vxp);
        AN(*pvex);
        vxp_expr_lhs(vxp, &(*pvex)->lhs);
        ERRCHK(vxp);

        if ((*pvex)->lhs->vxid) {
                vxp_vxid_cmp(vxp);
                ERRCHK(vxp);
        }

        /* Test operator */
        switch (vxp->t->tok) {

        /* Single lhs expressions don't take any more tokens */
        case EOI:
        case T_AND:
        case T_OR:
        case ')':
                (*pvex)->tok = T_TRUE;
                return;

        /* Valid operators */
        case T_EQ:              /* == */
        case '<':               /* < */
        case '>':               /* > */
        case T_GEQ:             /* >= */
        case T_LEQ:             /* <= */
        case T_NEQ:             /* != */
        case T_SEQ:             /* eq */
        case T_SNEQ:            /* ne */
        case '~':               /* ~ */
        case T_NOMATCH:         /* !~ */
                (*pvex)->tok = vxp->t->tok;
                break;

        /* Error */
        default:
                VSB_printf(vxp->sb, "Expected operator got '%.*s' ",
                    PF(vxp->t));
                vxp_ErrWhere(vxp, vxp->t, -1);
                return;
        }
        vxp_NextToken(vxp);
        ERRCHK(vxp);

        /* Value */
        switch ((*pvex)->tok) {
        case '\0':
                WRONG("Missing token");
                break;
        case T_EQ:              /* == */
        case '<':               /* < */
        case '>':               /* > */
        case T_GEQ:             /* >= */
        case T_LEQ:             /* <= */
        case T_NEQ:             /* != */
                vxp_expr_num(vxp, &(*pvex)->rhs, (*pvex)->lhs->vxid);
                break;
        case T_SEQ:             /* eq */
        case T_SNEQ:            /* ne */
                vxp_expr_str(vxp, &(*pvex)->rhs);
                break;
        case '~':               /* ~ */
        case T_NOMATCH:         /* !~ */
                vxp_expr_regex(vxp, &(*pvex)->rhs);
                break;
        default:
                INCOMPL();
        }
}

/*
 * SYNTAX:
 *   expr_group:
 *     '(' expr_or ')'
 *     expr_not
 */

static void
vxp_expr_group(struct vxp *vxp, struct vex **pvex)
{

        AN(pvex);
        AZ(*pvex);

        if (vxp->t->tok == '(') {
                SkipToken(vxp, '(');
                vxp_expr_or(vxp, pvex);
                ERRCHK(vxp);
                SkipToken(vxp, ')');
                return;
        }

        vxp_expr_cmp(vxp, pvex);
}

/*
 * SYNTAX:
 *   expr_not:
 *     'not' expr_group
 *     expr_group
 */

static void
vxp_expr_not(struct vxp *vxp, struct vex **pvex)
{

        AN(pvex);
        AZ(*pvex);

        if (vxp->t->tok == T_NOT) {
                *pvex = vex_alloc(vxp);
                AN(*pvex);
                (*pvex)->tok = vxp->t->tok;
                vxp_NextToken(vxp);
                vxp_expr_group(vxp, &(*pvex)->a);
                return;
        }

        vxp_expr_group(vxp, pvex);
}

/*
 * SYNTAX:
 *   expr_and:
 *     expr_not { 'and' expr_not }*
 */

static void
vxp_expr_and(struct vxp *vxp, struct vex **pvex)
{
        struct vex *a;

        AN(pvex);
        AZ(*pvex);
        vxp_expr_not(vxp, pvex);
        ERRCHK(vxp);
        while (vxp->t->tok == T_AND) {
                a = *pvex;
                *pvex = vex_alloc(vxp);
                AN(*pvex);
                (*pvex)->tok = vxp->t->tok;
                (*pvex)->a = a;
                vxp_NextToken(vxp);
                ERRCHK(vxp);
                vxp_expr_not(vxp, &(*pvex)->b);
                ERRCHK(vxp);
        }
}

/*
 * SYNTAX:
 *   expr_or:
 *     expr_and { 'or' expr_and }*
 */

static void
vxp_expr_or(struct vxp *vxp, struct vex **pvex)
{
        struct vex *a;

        AN(pvex);
        AZ(*pvex);
        vxp_expr_and(vxp, pvex);
        ERRCHK(vxp);
        while (vxp->t->tok == T_OR) {
                a = *pvex;
                *pvex = vex_alloc(vxp);
                AN(*pvex);
                (*pvex)->tok = vxp->t->tok;
                (*pvex)->a = a;
                vxp_NextToken(vxp);
                ERRCHK(vxp);
                vxp_expr_and(vxp, &(*pvex)->b);
                ERRCHK(vxp);
        }
}

/*
 * SYNTAX:
 *   expr:
 *     expr_or EOI { 'or' expr_or EOI }?
 */

static void
vxp_expr(struct vxp *vxp, struct vex **pvex)
{
        struct vex *a = NULL, *or;

        if (*pvex == NULL) {
                vxp_expr_or(vxp, pvex);
                ERRCHK(vxp);
                ExpectErr(vxp, EOI);
                return;
        }

        vxp_expr(vxp, &a);
        ERRCHK(vxp);

        or = vex_alloc(vxp);
        AN(or);
        or->tok = T_OR;
        or->b = *pvex;
        or->a = a;
        *pvex = or;
}

/*
 * Build a struct vex tree from the token list in vxp
 */

struct vex *
vxp_Parse(struct vxp *vxp)
{
        struct vex *vex = NULL;

        AZ(vxp->err);
        vxp->t = VTAILQ_FIRST(&vxp->tokens);

        while (vxp->t != NULL) {
                /* Ignore empty queries */
                while (vxp->t != NULL && vxp->t->tok == EOI)
                        vxp->t = VTAILQ_NEXT(vxp->t, list);

                if (vxp->t == NULL)
                        break;

                vxp_expr(vxp, &vex);

                if (vxp->err) {
                        if (vex)
                                vex_Free(&vex);
                        AZ(vex);
                        return (NULL);
                }

                vxp->t = VTAILQ_NEXT(vxp->t, list);
        }

        return (vex);
}

/*
 * Free a struct vex tree
 */

void
vex_Free(struct vex **pvex)
{
        struct vex *vex;
        struct vex_lhs *lhs;
        struct vex_rhs *rhs;

        TAKE_OBJ_NOTNULL(vex, pvex, VEX_MAGIC);

        if (vex->lhs) {
                CAST_OBJ_NOTNULL(lhs, vex->lhs, VEX_LHS_MAGIC);
                if (lhs->tags)
                        vbit_destroy(lhs->tags);
                if (lhs->prefix)
                        free(lhs->prefix);
                FREE_OBJ(lhs);
        }
        if (vex->rhs) {
                CAST_OBJ_NOTNULL(rhs, vex->rhs, VEX_RHS_MAGIC);
                if (rhs->val_string)
                        free(rhs->val_string);
                if (rhs->val_regex)
                        VRE_free(&rhs->val_regex);
                FREE_OBJ(rhs);
        }
        if (vex->a) {
                vex_Free(&vex->a);
                AZ(vex->a);
        }
        if (vex->b) {
                vex_Free(&vex->b);
                AZ(vex->b);
        }
        FREE_OBJ(vex);
}

#ifdef VXP_DEBUG

static void
vex_print_rhs(const struct vex_rhs *rhs)
{

        CHECK_OBJ_NOTNULL(rhs, VEX_RHS_MAGIC);
        fprintf(stderr, "rhs=");
        switch (rhs->type) {
        case VEX_INT:
                fprintf(stderr, "INT(%jd)", (intmax_t)rhs->val_int);
                break;
        case VEX_FLOAT:
                fprintf(stderr, "FLOAT(%f)", rhs->val_float);
                break;
        case VEX_STRING:
                AN(rhs->val_string);
                fprintf(stderr, "STRING(%s)", rhs->val_string);
                break;
        case VEX_REGEX:
                AN(rhs->val_string);
                AN(rhs->val_regex);
                fprintf(stderr, "REGEX(%s)", rhs->val_string);
                break;
        default:
                WRONG("rhs type");
                break;
        }
}

static void
vex_print_tags(const struct vbitmap *vbm)
{
        int i;
        int first = 1;

        for (i = 0; i < SLT__MAX; i++) {
                if (VSL_tags[i] == NULL)
                        continue;
                if (!vbit_test(vbm, i))
                        continue;
                if (first)
                        first = 0;
                else
                        fprintf(stderr, ",");
                fprintf(stderr, "%s", VSL_tags[i]);
        }
}

static void
vex_print(const struct vex *vex, int indent)
{
        CHECK_OBJ_NOTNULL(vex, VEX_MAGIC);

        fprintf(stderr, "%*s%s", indent, "", vxp_tnames[vex->tok]);
        if (vex->lhs != NULL) {
                CHECK_OBJ(vex->lhs, VEX_LHS_MAGIC);
                AN(vex->lhs->tags);
                fprintf(stderr, " lhs=");
                if (vex->lhs->level >= 0)
                        fprintf(stderr, "{%d%s}", vex->lhs->level,
                            vex->lhs->level_pm < 0 ? "-" :
                            vex->lhs->level_pm > 0 ? "+" : "");
                fprintf(stderr, "(");
                vex_print_tags(vex->lhs->tags);
                fprintf(stderr, ")");
                if (vex->lhs->prefix) {
                        assert(vex->lhs->prefixlen == strlen(vex->lhs->prefix));
                        fprintf(stderr, ":%s", vex->lhs->prefix);
                }
                if (vex->lhs->field > 0)
                        fprintf(stderr, "[%d]", vex->lhs->field);
        }
        if (vex->rhs != NULL) {
                fprintf(stderr, " ");
                vex_print_rhs(vex->rhs);
        }
        fprintf(stderr, "\n");
        if (vex->a != NULL)
                vex_print(vex->a, indent + 2);
        if (vex->b != NULL)
                vex_print(vex->b, indent + 2);
}

void
vex_PrintTree(const struct vex *vex)
{

        CHECK_OBJ_NOTNULL(vex, VEX_MAGIC);
        fprintf(stderr, "VEX tree:\n");
        vex_print(vex, 2);
}

#endif /* VXP_DEBUG */

		varnish-cache/lib/libvarnishapi/vxp_parse.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2015 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Martin Blix Grydeland <martin@varnish-software.com>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*
30		*/
31
32		#include "config.h"
33
34		#include <ctype.h>
35		#include <math.h>
36		#include <stdio.h>
37
38		#include "vdef.h"
39		#include "vas.h"
40		#include "miniobj.h"
41
42		#include "vbm.h"
43		#include "vqueue.h"
44		#include "vre.h"
45		#include "vsb.h"
46
47		#include "vapi/vsl.h"
48
49		#include "vsl_api.h"
50		#include "vxp.h"
51
52		static void vxp_expr_or(struct vxp vxp, struct vex *pvex);
53
54		static struct vex *
55	639	vex_alloc(const struct vxp *vxp)
56		{
57		struct vex *vex;
58
59	639	ALLOC_OBJ(vex, VEX_MAGIC);
60	639	AN(vex);
61	639	vex->options = vxp->vex_options;
62	639	return (vex);
63		}
64
65		static void
66	573	vxp_expr_lhs(struct vxp vxp, struct vex_lhs *plhs)
67		{
68		char *p;
69		int i;
70
71	573	AN(plhs);
72	573	AZ(*plhs);
73	573	ALLOC_OBJ(*plhs, VEX_LHS_MAGIC);
74	573	AN(*plhs);
75	573	(*plhs)->tags = vbit_new(SLT__MAX);
76	573	(*plhs)->level = -1;
77
78	573	if (vxp->t->tok == '{') {
79		/* Transaction level limits */
80	21	vxp_NextToken(vxp);
81	21	if (vxp->t->tok != VAL) {
82	6	VSB_printf(vxp->sb, "Expected integer got '%.*s' ",
83	3	PF(vxp->t));
84	3	vxp_ErrWhere(vxp, vxp->t, -1);
85	3	return;
86		}
87	18	(*plhs)->level = (int)strtol(vxp->t->dec, &p, 0);
88	18	if ((*plhs)->level < 0) {
89	3	VSB_cat(vxp->sb, "Expected positive integer ");
90	3	vxp_ErrWhere(vxp, vxp->t, -1);
91	3	return;
92		}
93	15	if (*p == '-') {
94	3	(*plhs)->level_pm = -1;
95	3	p++;
96	15	} else if (*p == '+') {
97	3	(*plhs)->level_pm = 1;
98	3	p++;
99	3	}
100	15	if (*p) {
101	3	VSB_cat(vxp->sb, "Syntax error in level limit ");
102	3	vxp_ErrWhere(vxp, vxp->t, -1);
103	3	return;
104		}
105	12	vxp_NextToken(vxp);
106	12	ExpectErr(vxp, '}');
107	12	vxp_NextToken(vxp);
108	12	}
109
110	576	while (1) {
111		/* The tags this expression applies to */
112	576	if (vxp->t->tok == VXID) {
113	81	(*plhs)->vxid++;
114	81	i = 0;
115	576	} else if (vxp->t->tok != VAL) {
116	6	VSB_printf(vxp->sb, "Expected VSL tag name got '%.*s' ",
117	3	PF(vxp->t));
118	3	vxp_ErrWhere(vxp, vxp->t, -1);
119	3	return;
120		} else {
121	492	(*plhs)->taglist++;
122	984	i = VSL_Glob2Tags(vxp->t->dec, -1, vsl_vbm_bitset,
123	492	(*plhs)->tags);
124		}
125	573	if (i == -1) {
126	6	VSB_cat(vxp->sb, "Tag name matches zero tags ");
127	6	vxp_ErrWhere(vxp, vxp->t, -1);
128	6	return;
129		}
130	567	if (i == -2) {
131	3	VSB_cat(vxp->sb, "Tag name is ambiguous ");
132	3	vxp_ErrWhere(vxp, vxp->t, -1);
133	3	return;
134		}
135	564	if (i == -3) {
136	3	VSB_cat(vxp->sb, "Syntax error in tag name ");
137	3	vxp_ErrWhere(vxp, vxp->t, -1);
138	3	return;
139		}
140	561	assert(i > 0 \|\| vxp->t->tok == VXID);
141	561	vxp_NextToken(vxp);
142	561	if (vxp->t->tok != ',')
143	549	break;
144	12	vxp_NextToken(vxp);
145		}
146
147	549	if (vxp->t->tok == ':') {
148		/* Record prefix */
149	63	vxp_NextToken(vxp);
150	63	if (vxp->t->tok != VAL) {
151	6	VSB_printf(vxp->sb, "Expected string got '%.*s' ",
152	3	PF(vxp->t));
153	3	vxp_ErrWhere(vxp, vxp->t, -1);
154	3	return;
155		}
156	60	AN(vxp->t->dec);
157	60	(*plhs)->prefix = strdup(vxp->t->dec);
158	60	AN((*plhs)->prefix);
159	60	(plhs)->prefixlen = strlen((plhs)->prefix);
160	60	vxp_NextToken(vxp);
161	60	}
162
163	546	if (vxp->t->tok == '[') {
164		/* LHS field [] */
165	36	vxp_NextToken(vxp);
166	36	if (vxp->t->tok != VAL) {
167	6	VSB_printf(vxp->sb, "Expected integer got '%.*s' ",
168	3	PF(vxp->t));
169	3	vxp_ErrWhere(vxp, vxp->t, -1);
170	3	return;
171		}
172	33	(*plhs)->field = (int)strtol(vxp->t->dec, &p, 0);
173	33	if (p \|\| (plhs)->field <= 0) {
174	3	VSB_cat(vxp->sb, "Expected positive integer ");
175	3	vxp_ErrWhere(vxp, vxp->t, -1);
176	3	return;
177		}
178	30	vxp_NextToken(vxp);
179	30	ExpectErr(vxp, ']');
180	30	vxp_NextToken(vxp);
181	30	}
182
183	540	if ((*plhs)->vxid == 0)
184	462	return;
185
186	147	if ((plhs)->vxid > 1 \|\| (plhs)->level >= 0 \|\|
187	72	(plhs)->field > 0 \|\| (plhs)->prefixlen > 0 \|\|
188	69	(*plhs)->taglist > 0) {
189	12	VSB_cat(vxp->sb, "Unexpected taglist selection for vxid ");
190	12	vxp_ErrWhere(vxp, vxp->t, -1);
191	12	}
192	573	}
193
194		static void
195	222	vxp_expr_num(struct vxp vxp, struct vex_rhs *prhs, unsigned vxid)
196		{
197		char *endptr;
198
199	222	AN(prhs);
200	222	AZ(*prhs);
201	222	if (vxp->t->tok != VAL) {
202	3	VSB_printf(vxp->sb, "Expected number got '%.*s' ", PF(vxp->t));
203	3	vxp_ErrWhere(vxp, vxp->t, -1);
204	3	return;
205		}
206	219	AN(vxp->t->dec);
207	219	ALLOC_OBJ(*prhs, VEX_RHS_MAGIC);
208	219	AN(*prhs);
209	219	endptr = NULL;
210	219	if (strchr(vxp->t->dec, '.')) {
211	36	(*prhs)->type = VEX_FLOAT;
212	36	(*prhs)->val_float = strtod(vxp->t->dec, &endptr);
213	36	} else {
214	183	(*prhs)->type = VEX_INT;
215	183	(*prhs)->val_int = strtoll(vxp->t->dec, &endptr, 0);
216		}
217	219	while (isspace(*endptr))
218	0	endptr++;
219	219	if (*endptr != '\0') {
220	12	VSB_printf(vxp->sb, "%s parse error ",
221	6	(*prhs)->type == VEX_FLOAT ? "Floating point" : "Integer");
222	6	vxp_ErrWhere(vxp, vxp->t, -1);
223	6	return;
224		}
225	213	if (vxid && (*prhs)->type != VEX_INT) {
226	6	VSB_printf(vxp->sb, "Expected integer got '%.*s' ",
227	3	PF(vxp->t));
228	3	vxp_ErrWhere(vxp, vxp->t, 0);
229	3	return;
230		}
231	210	vxp_NextToken(vxp);
232	222	}
233
234		static void
235	39	vxp_expr_str(struct vxp vxp, struct vex_rhs *prhs)
236		{
237
238	39	AN(prhs);
239	39	AZ(*prhs);
240	39	if (vxp->t->tok != VAL) {
241	3	VSB_printf(vxp->sb, "Expected string got '%.*s' ", PF(vxp->t));
242	3	vxp_ErrWhere(vxp, vxp->t, -1);
243	3	return;
244		}
245	36	AN(vxp->t->dec);
246	36	ALLOC_OBJ(*prhs, VEX_RHS_MAGIC);
247	36	AN(*prhs);
248	36	(*prhs)->type = VEX_STRING;
249	36	(*prhs)->val_string = strdup(vxp->t->dec);
250	36	AN((*prhs)->val_string);
251	36	(prhs)->val_stringlen = strlen((prhs)->val_string);
252	36	vxp_NextToken(vxp);
253	39	}
254
255		static void
256	159	vxp_expr_regex(struct vxp vxp, struct vex_rhs *prhs)
257		{
258		int err, erroff;
259
260		/* XXX: Caseless option */
261
262	159	AN(prhs);
263	159	AZ(*prhs);
264	159	if (vxp->t->tok != VAL) {
265	6	VSB_printf(vxp->sb, "Expected regular expression got '%.*s' ",
266	3	PF(vxp->t));
267	3	vxp_ErrWhere(vxp, vxp->t, -1);
268	3	return;
269		}
270	156	AN(vxp->t->dec);
271	156	ALLOC_OBJ(*prhs, VEX_RHS_MAGIC);
272	156	AN(*prhs);
273	156	(*prhs)->type = VEX_REGEX;
274	156	(*prhs)->val_string = strdup(vxp->t->dec);
275	156	(*prhs)->val_regex = VRE_compile(vxp->t->dec, vxp->vre_options,
276		&err, &erroff, 1);
277	156	if ((*prhs)->val_regex == NULL) {
278	3	VSB_cat(vxp->sb, "Regular expression error: ");
279	3	AZ(VRE_error(vxp->sb, err));
280	3	VSB_putc(vxp->sb, ' ');
281	3	vxp_ErrWhere(vxp, vxp->t, erroff);
282	3	return;
283		}
284	153	vxp_NextToken(vxp);
285	159	}
286
287		static void
288	66	vxp_vxid_cmp(struct vxp *vxp)
289		{
290
291	66	switch (vxp->t->tok) {
292		/* Valid operators */
293		case T_EQ: /* == */
294		case '<': /* < */
295		case '>': /* > */
296		case T_GEQ: /* >= */
297		case T_LEQ: /* <= */
298		case T_NEQ: /* != */
299	54	break;
300
301		/* Error */
302		default:
303	24	VSB_printf(vxp->sb, "Expected vxid operator got '%.*s' ",
304	12	PF(vxp->t));
305	12	vxp_ErrWhere(vxp, vxp->t, -1);
306	12	}
307	66	}
308
309		/*
310		* SYNTAX:
311		* expr_cmp:
312		* lhs
313		* lhs <operator> num\|str\|regex
314		*/
315
316		static void
317	573	vxp_expr_cmp(struct vxp vxp, struct vex *pvex)
318		{
319
320	573	AN(pvex);
321	573	AZ(*pvex);
322	573	*pvex = vex_alloc(vxp);
323	573	AN(*pvex);
324	573	vxp_expr_lhs(vxp, &(*pvex)->lhs);
325	573	ERRCHK(vxp);
326
327	528	if ((*pvex)->lhs->vxid) {
328	66	vxp_vxid_cmp(vxp);
329	66	ERRCHK(vxp);
330	54	}
331
332		/* Test operator */
333	516	switch (vxp->t->tok) {
334
335		/* Single lhs expressions don't take any more tokens */
336		case EOI:
337		case T_AND:
338		case T_OR:
339		case ')':
340	93	(*pvex)->tok = T_TRUE;
341	93	return;
342
343		/* Valid operators */
344		case T_EQ: /* == */
345		case '<': /* < */
346		case '>': /* > */
347		case T_GEQ: /* >= */
348		case T_LEQ: /* <= */
349		case T_NEQ: /* != */
350		case T_SEQ: /* eq */
351		case T_SNEQ: /* ne */
352		case '~': /* ~ */
353		case T_NOMATCH: /* !~ */
354	420	(*pvex)->tok = vxp->t->tok;
355	420	break;
356
357		/* Error */
358		default:
359	6	VSB_printf(vxp->sb, "Expected operator got '%.*s' ",
360	3	PF(vxp->t));
361	3	vxp_ErrWhere(vxp, vxp->t, -1);
362	3	return;
363		}
364	420	vxp_NextToken(vxp);
365	420	ERRCHK(vxp);
366
367		/* Value */
368	420	switch ((*pvex)->tok) {
369		case '\0':
370	0	WRONG("Missing token");
371	0	break;
372		case T_EQ: /* == */
373		case '<': /* < */
374		case '>': /* > */
375		case T_GEQ: /* >= */
376		case T_LEQ: /* <= */
377		case T_NEQ: /* != */
378	222	vxp_expr_num(vxp, &(pvex)->rhs, (pvex)->lhs->vxid);
379	222	break;
380		case T_SEQ: /* eq */
381		case T_SNEQ: /* ne */
382	39	vxp_expr_str(vxp, &(*pvex)->rhs);
383	39	break;
384		case '~': /* ~ */
385		case T_NOMATCH: /* !~ */
386	159	vxp_expr_regex(vxp, &(*pvex)->rhs);
387	159	break;
388		default:
389	0	INCOMPL();
390	0	}
391	573	}
392
393		/*
394		* SYNTAX:
395		* expr_group:
396		* '(' expr_or ')'
397		* expr_not
398		*/
399
400		static void
401	588	vxp_expr_group(struct vxp vxp, struct vex *pvex)
402		{
403
404	588	AN(pvex);
405	588	AZ(*pvex);
406
407	588	if (vxp->t->tok == '(') {
408	15	SkipToken(vxp, '(');
409	15	vxp_expr_or(vxp, pvex);
410	15	ERRCHK(vxp);
411	15	SkipToken(vxp, ')');
412	15	return;
413		}
414
415	573	vxp_expr_cmp(vxp, pvex);
416	588	}
417
418		/*
419		* SYNTAX:
420		* expr_not:
421		* 'not' expr_group
422		* expr_group
423		*/
424
425		static void
426	588	vxp_expr_not(struct vxp vxp, struct vex *pvex)
427		{
428
429	588	AN(pvex);
430	588	AZ(*pvex);
431
432	588	if (vxp->t->tok == T_NOT) {
433	3	*pvex = vex_alloc(vxp);
434	3	AN(*pvex);
435	3	(*pvex)->tok = vxp->t->tok;
436	3	vxp_NextToken(vxp);
437	3	vxp_expr_group(vxp, &(*pvex)->a);
438	3	return;
439		}
440
441	585	vxp_expr_group(vxp, pvex);
442	588	}
443
444		/*
445		* SYNTAX:
446		* expr_and:
447		* expr_not { 'and' expr_not }*
448		*/
449
450		static void
451	564	vxp_expr_and(struct vxp vxp, struct vex *pvex)
452		{
453		struct vex *a;
454
455	564	AN(pvex);
456	564	AZ(*pvex);
457	564	vxp_expr_not(vxp, pvex);
458	564	ERRCHK(vxp);
459	507	while (vxp->t->tok == T_AND) {
460	24	a = *pvex;
461	24	*pvex = vex_alloc(vxp);
462	24	AN(*pvex);
463	24	(*pvex)->tok = vxp->t->tok;
464	24	(*pvex)->a = a;
465	24	vxp_NextToken(vxp);
466	24	ERRCHK(vxp);
467	24	vxp_expr_not(vxp, &(*pvex)->b);
468	24	ERRCHK(vxp);
469		}
470	564	}
471
472		/*
473		* SYNTAX:
474		* expr_or:
475		* expr_and { 'or' expr_and }*
476		*/
477
478		static void
479	543	vxp_expr_or(struct vxp vxp, struct vex *pvex)
480		{
481		struct vex *a;
482
483	543	AN(pvex);
484	543	AZ(*pvex);
485	543	vxp_expr_and(vxp, pvex);
486	543	ERRCHK(vxp);
487	483	while (vxp->t->tok == T_OR) {
488	21	a = *pvex;
489	21	*pvex = vex_alloc(vxp);
490	21	AN(*pvex);
491	21	(*pvex)->tok = vxp->t->tok;
492	21	(*pvex)->a = a;
493	21	vxp_NextToken(vxp);
494	21	ERRCHK(vxp);
495	21	vxp_expr_and(vxp, &(*pvex)->b);
496	21	ERRCHK(vxp);
497		}
498	543	}
499