/** BEGIN COPYRIGHT BLOCK
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2009 Red Hat, Inc.
 * All rights reserved.
 *
 * License: GPL (version 3 or any later version).
 * See LICENSE for details.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

/* numericstring.c - Numeric String syntax routines */

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "syntax.h"

static int numstr_filter_ava(Slapi_PBlock *pb, struct berval *bvfilter, Slapi_Value **bvals, int ftype, Slapi_Value **retVal);
static int numstr_filter_sub(Slapi_PBlock *pb, char *initial, char **any, char * final, Slapi_Value **bvals);
static int numstr_values2keys(Slapi_PBlock *pb, Slapi_Value **val, Slapi_Value ***ivals, int ftype);
static int numstr_assertion2keys(Slapi_PBlock *pb, Slapi_Value *val, Slapi_Value ***ivals, int ftype);
static int numstr_assertion2keys_sub(Slapi_PBlock *pb, char *initial, char **any, char * final, Slapi_Value ***ivals);
static int numstr_compare(struct berval *v1, struct berval *v2);
static int numstr_validate(struct berval *val);
static void numstr_normalize(
    Slapi_PBlock *pb,
    char *s,
    int trim_spaces,
    char **alt);

/* the first name is the official one from RFC 4517 */
static char *names[] = {"Numeric String", "numstr", NUMERICSTRING_SYNTAX_OID, 0};

#define NUMERICSTRINGMATCH_OID "2.5.13.8"
#define NUMERICSTRINGORDERINGMATCH_OID "2.5.13.9"
#define NUMERICSTRINGSUBSTRINGSMATCH_OID "2.5.13.10"

static Slapi_PluginDesc pdesc = {"numstr-syntax", VENDOR,
                                 DS_PACKAGE_VERSION, "numeric string attribute syntax plugin"};

static const char *numericStringMatch_names[] = {"numericStringMatch", NUMERICSTRINGMATCH_OID, NULL};
static const char *numericStringOrderingMatch_names[] = {"numericStringOrderingMatch", NUMERICSTRINGORDERINGMATCH_OID, NULL};
static const char *numericStringSubstringsMatch_names[] = {"numericStringSubstringsMatch", NUMERICSTRINGSUBSTRINGSMATCH_OID, NULL};

static char *numericStringSubstringsMatch_syntaxes[] = {NUMERICSTRING_SYNTAX_OID, NULL};

static struct mr_plugin_def mr_plugin_table[] = {
    {
        {
            NUMERICSTRINGMATCH_OID,
            NULL /* no alias? */,
            "numericStringMatch",
            "The rule evaluates to TRUE if and only if the prepared "
            "attribute value character string and the prepared assertion value character "
            "string have the same number of characters and corresponding characters have "
            "the same code point.",
            NUMERICSTRING_SYNTAX_OID,
            0 /* not obsolete */,
            NULL /* numstr syntax only for now */
        },
        {"numericStringMatch-mr",
         VENDOR,
         DS_PACKAGE_VERSION,
         "numericStringMatch matching rule plugin"}, /* plugin desc */
        numericStringMatch_names,                    /* matching rule name/oid/aliases */
        NULL,
        NULL,
        numstr_filter_ava,
        NULL,
        numstr_values2keys,
        numstr_assertion2keys,
        NULL,
        numstr_compare,
        NULL /* mr_normalise */
    },
    {
        {
            NUMERICSTRINGORDERINGMATCH_OID,
            NULL /* no alias? */,
            "numericStringOrderingMatch",
            "The rule evaluates to TRUE if and only if, "
            "in the code point collation order, the prepared attribute value character "
            "string appears earlier than the prepared assertion value character string; "
            "i.e., the attribute value is less than the assertion value.",
            NUMERICSTRING_SYNTAX_OID,
            0 /* not obsolete */,
            NULL /* numstr syntax only for now */
        },
        {"numericStringOrderingMatch-mr",
         VENDOR,
         DS_PACKAGE_VERSION,
         "numericStringOrderingMatch matching rule plugin"}, /* plugin desc */
        numericStringOrderingMatch_names,                    /* matching rule name/oid/aliases */
        NULL,
        NULL,
        numstr_filter_ava,
        NULL,
        numstr_values2keys,
        numstr_assertion2keys,
        NULL,
        numstr_compare,
        NULL /* mr_normalise */
    },
    {
        {NUMERICSTRINGSUBSTRINGSMATCH_OID,
         NULL /* no alias? */,
         "numericStringSubstringsMatch",
         "The rule evaluates to TRUE if and only if (1) "
         "the prepared substrings of the assertion value match disjoint portions of "
         "the prepared attribute value, (2) an initial substring, if present, matches "
         "the beginning of the prepared attribute value character string, and (3) a "
         "final substring, if present, matches the end of the prepared attribute value "
         "character string.",
         "1.3.6.1.4.1.1466.115.121.1.58",
         0 /* not obsolete */,
         numericStringSubstringsMatch_syntaxes}, /* matching rule desc */
        {
            "numericStringSubstringsMatch-mr",
            VENDOR,
            DS_PACKAGE_VERSION,
            "numericStringSubstringsMatch matching rule plugin"}, /* plugin desc */
        numericStringSubstringsMatch_names,                       /* matching rule name/oid/aliases */
        NULL,
        NULL,
        NULL,
        numstr_filter_sub,
        numstr_values2keys,
        NULL,
        numstr_assertion2keys_sub,
        numstr_compare,
        NULL /* mr_normalise */
    },
};

static size_t mr_plugin_table_size = sizeof(mr_plugin_table) / sizeof(mr_plugin_table[0]);

static int
matching_rule_plugin_init(Slapi_PBlock *pb)
{
    return syntax_matching_rule_plugin_init(pb, mr_plugin_table, mr_plugin_table_size);
}

static int
register_matching_rule_plugins(void)
{
    return syntax_register_matching_rule_plugins(mr_plugin_table, mr_plugin_table_size, matching_rule_plugin_init);
}

int
numstr_init(Slapi_PBlock *pb)
{
    int rc, flags;

    slapi_log_err(SLAPI_LOG_PLUGIN, SYNTAX_PLUGIN_SUBSYSTEM, "=> numstr_init\n");

    rc = slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION,
                          (void *)SLAPI_PLUGIN_VERSION_01);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DESCRIPTION,
                           (void *)&pdesc);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_FILTER_AVA,
                           (void *)numstr_filter_ava);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_VALUES2KEYS,
                           (void *)numstr_values2keys);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_ASSERTION2KEYS_AVA,
                           (void *)numstr_assertion2keys);
    flags = SLAPI_PLUGIN_SYNTAX_FLAG_ORDERING;
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_FLAGS,
                           (void *)&flags);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_NAMES,
                           (void *)names);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_OID,
                           (void *)NUMERICSTRING_SYNTAX_OID);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_COMPARE,
                           (void *)numstr_compare);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_VALIDATE,
                           (void *)numstr_validate);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_NORMALIZE,
                           (void *)numstr_normalize);

    rc |= register_matching_rule_plugins();
    slapi_log_err(SLAPI_LOG_PLUGIN, SYNTAX_PLUGIN_SUBSYSTEM, "<= numstr_init %d\n", rc);
    return (rc);
}

static int
numstr_filter_ava(Slapi_PBlock *pb, struct berval *bvfilter, Slapi_Value **bvals, int ftype, Slapi_Value **retVal)
{
    int filter_normalized = 0;
    int syntax = SYNTAX_SI | SYNTAX_CES;
    if (pb) {
        slapi_pblock_get(pb, SLAPI_PLUGIN_SYNTAX_FILTER_NORMALIZED,
                         &filter_normalized);
        if (filter_normalized) {
            syntax |= SYNTAX_NORM_FILT;
        }
    }
    return (string_filter_ava(bvfilter, bvals, syntax,
                              ftype, retVal));
}

static int
numstr_filter_sub(
    Slapi_PBlock *pb,
    char *initial,
    char **any,
    char * final,
    Slapi_Value **bvals)
{
    return (string_filter_sub(pb, initial, any, final, bvals, SYNTAX_SI | SYNTAX_CES));
}

static int
numstr_values2keys(Slapi_PBlock *pb, Slapi_Value **vals, Slapi_Value ***ivals, int ftype)
{
    return (string_values2keys(pb, vals, ivals, SYNTAX_SI | SYNTAX_CES,
                               ftype));
}

static int
numstr_assertion2keys(Slapi_PBlock *pb, Slapi_Value *val, Slapi_Value ***ivals, int ftype)
{
    return (string_assertion2keys_ava(pb, val, ivals,
                                      SYNTAX_SI | SYNTAX_CES, ftype));
}

static int
numstr_assertion2keys_sub(
    Slapi_PBlock *pb,
    char *initial,
    char **any,
    char * final,
    Slapi_Value ***ivals)
{
    return (string_assertion2keys_sub(pb, initial, any, final, ivals,
                                      SYNTAX_SI | SYNTAX_CES));
}

static int
numstr_compare(
    struct berval *v1,
    struct berval *v2)
{
    return value_cmp(v1, v2, SYNTAX_SI | SYNTAX_CES, 3 /* Normalise both values */);
}

/* return 0 if valid, non-0 if invalid */
static int
numstr_validate(
    struct berval *val)
{
    int rc = 0; /* assume the value is valid */
    const char *p = NULL;

    /* Per RFC4517:
     *
     *   NumericString = 1*(DIGIT / SPACE)
     */
    if (val != NULL) {
        for (p = val->bv_val; p < &(val->bv_val[val->bv_len]); p++) {
            if (!isdigit(*p) && !IS_SPACE(*p)) {
                rc = 1;
                goto exit;
            }
        }
    } else {
        rc = 1;
    }

exit:
    return (rc);
}

static void
numstr_normalize(
    Slapi_PBlock *pb __attribute__((unused)),
    char *s,
    int trim_spaces,
    char **alt)
{
    value_normalize_ext(s, SYNTAX_SI | SYNTAX_CES, trim_spaces, alt);
    return;
}