fminject/common/inj_string.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <string.h>
#include <limits.h>
#include <stdlib.h>
#include <sys/types.h>

#include <inj.h>
#include <inj_err.h>
#include <inj_string.h>

char *
inj_strdup(const char *s)
{
    char *s1 = inj_alloc(strlen(s) + 1);

    (void) strcpy(s1, s);
    return (s1);
}

char *
inj_strndup(const char *s, size_t n)
{
    char *s2 = inj_alloc(n + 1);

    (void) strncpy(s2, s, n + 1);
    s2[n] = '\0';
    return (s2);
}

void
inj_strfree(const char *s)
{
    inj_free((void *)s, strlen(s) + 1);
}

typedef struct type_desc {
    int64_t td_min;
    uint64_t td_max;
} type_desc_t;

static const type_desc_t signed_types[] = {
    { 0, 0 },
    { INT8_MIN, INT8_MAX },
    { INT16_MIN, INT16_MAX },
    { 0, 0 },
    { INT32_MIN, INT32_MAX },
    { 0, 0 },
    { 0, 0 },
    { 0, 0 },
    { INT64_MIN, INT64_MAX }
};

static const type_desc_t unsigned_types[] = {
    { 0, 0 },
    { 0, UINT8_MAX },
    { 0, UINT16_MAX },
    { 0, 0 },
    { 0, UINT32_MAX },
    { 0, 0 },
    { 0, 0 },
    { 0, 0 },
    { 0, UINT64_MAX }
};

int
inj_strtoll(const char *str, int width, longlong_t *valp)
{
    const type_desc_t *desc;
    longlong_t val;
    char *c;

    if (width != 0) {
        assert(width / 8 < (sizeof (signed_types) /
            sizeof (signed_types[0])));
        desc = &signed_types[width / 8];
        assert(desc->td_max != 0);
    }

    errno = 0;
    val = strtoll(str, &c, 0);
    if (*c != '\0' || errno == EINVAL)
        return (inj_set_errno(EINVAL));

    if (errno == ERANGE || (width != 0 && (val < desc->td_min ||
        val > (longlong_t)desc->td_max)))
        return (inj_set_errno(ERANGE));

    if (valp != NULL)
        *valp = val;

    return (0);
}

int
inj_strtoull(const char *str, int width, u_longlong_t *valp)
{
    const type_desc_t *desc;
    u_longlong_t val;
    char *c;

    if (width != 0) {
        assert(width / 8 < (sizeof (unsigned_types) /
            sizeof (unsigned_types[0])));
        desc = &unsigned_types[width / 8];
        assert(desc->td_max != 0);
    }

    errno = 0;
    val = strtoull(str, &c, 0);
    if (*c != '\0' || errno == EINVAL)
        return (inj_set_errno(EINVAL));

    if (errno == ERANGE || (width != 0 && val > desc->td_max))
        return (inj_set_errno(ERANGE));

    if (valp != NULL)
        *valp = val;

    return (0);
}

int
inj_strtime(hrtime_t *nsp, const char *units)
{
    static const struct {
        const char *name;
        hrtime_t mul;
    } suffix[] = {
        { "ns",     NANOSEC / NANOSEC },
        { "nsec",   NANOSEC / NANOSEC },
        { "us",     NANOSEC / MICROSEC },
        { "usec",   NANOSEC / MICROSEC },
        { "ms",     NANOSEC / MILLISEC },
        { "msec",   NANOSEC / MILLISEC },
        { "s",      NANOSEC / SEC },
        { "sec",    NANOSEC / SEC },
        { "m",      NANOSEC * (hrtime_t)60 },
        { "min",    NANOSEC * (hrtime_t)60 },
        { "h",      NANOSEC * (hrtime_t)(60 * 60) },
        { "hour",   NANOSEC * (hrtime_t)(60 * 60) },
        { "d",      NANOSEC * (hrtime_t)(24 * 60 * 60) },
        { "day",    NANOSEC * (hrtime_t)(24 * 60 * 60) },
        { "hz",     0 },
        { NULL }
    };

    hrtime_t val = *nsp, mul = 1;
    int i;

    for (i = 0; suffix[i].name != NULL; i++) {
        if (strcasecmp(suffix[i].name, units) == 0) {
            mul = suffix[i].mul;
            break;
        }
    }

    if (suffix[i].name == NULL && *units != '\0')
        return (inj_set_errno(EINVAL));

    if (mul == 0) {
        if (val != 0)
            val = NANOSEC / val; /* compute val as value per sec */
    } else
        val *= mul;

    *nsp = val;
    return (0);
}

static ulong_t
inj_hashfn_string(void *key)
{
    size_t g, h = 0;
    char *p;

    assert(key != NULL);

    for (p = key; *p != '\0'; p++) {
        h = (h << 4) + *p;

        if ((g = (h & 0xf0000000)) != 0) {
            h ^= (g >> 24);
            h ^= g;
        }
    }

    return (h);
}

static int
inj_hashcmp_string(void *k1, void *k2)
{
    return (strcmp(k1, k2));
}

/*ARGSUSED*/
static void
inj_hashfree_string(inj_var_t *v, void *arg)
{
    inj_strfree(inj_hash_get_key(v));
}

void
inj_strhash_create(inj_hash_t *h)
{
    inj_hash_create(h, inj_hashfn_string, inj_hashcmp_string);
}

int
inj_strhash_insert(inj_hash_t *h, const char *str, uintmax_t value)
{
    return (inj_hash_insert(h, (void *)inj_strdup(str), value));
}

inj_var_t *
inj_strhash_lookup(inj_hash_t *h, const char *str)
{
    return (inj_hash_lookup(h, (void *)str));
}

void
inj_strhash_destroy(inj_hash_t *h)
{
    inj_hash_destroy(h, inj_hashfree_string, NULL);
}