/*

 * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <stdio.h>

#include <string.h>

#include <stdarg.h>

#include "jni.h"

#include "jli_util.h"

/*

 * Returns a pointer to a block of at least 'size' bytes of memory.

 * Prints error message and exits if the memory could not be allocated.

 */

JNIEXPORT void * JNICALL

JLI_MemAlloc(size_t size)

{

    void *p = malloc(size);

    if (p == 0) {

        perror("malloc");

        exit(1);

    }

    return p;

}

/*

 * Equivalent to realloc(size).

 * Prints error message and exits if the memory could not be reallocated.

 */

void *

JLI_MemRealloc(void *ptr, size_t size)

{

    void *p = realloc(ptr, size);

    if (p == 0) {

        perror("realloc");

        exit(1);

    }

    return p;

}

/*

 * Wrapper over strdup(3C) which prints an error message and exits if memory

 * could not be allocated.

 */

JNIEXPORT char * JNICALL

JLI_StringDup(const char *s1)

{

    char *s = strdup(s1);

    if (s == NULL) {

        perror("strdup");

        exit(1);

    }

    return s;

}

/*

 * Very equivalent to free(ptr).

 * Here to maintain pairing with the above routines.

 */

JNIEXPORT void JNICALL

JLI_MemFree(void *ptr)

{

    free(ptr);

}

jboolean

JLI_HasSuffix(const char *s1, const char *s2)

{

    char *p = JLI_StrRChr(s1, '.');

    if (p == NULL || *p == '\0') {

        return JNI_FALSE;

    }

    return (JLI_StrCaseCmp(p, s2) == 0);

}

/*

 * debug helpers we use

 */

static jboolean _launcher_debug = JNI_FALSE;

void

JLI_TraceLauncher(const char* fmt, ...)

{

    va_list vl;

    if (_launcher_debug != JNI_TRUE) return;

    va_start(vl, fmt);

    vprintf(fmt,vl);

    va_end(vl);

    fflush(stdout);

}

JNIEXPORT void JNICALL

JLI_SetTraceLauncher()

{

   if (getenv(JLDEBUG_ENV_ENTRY) != 0) {

        _launcher_debug = JNI_TRUE;

        JLI_TraceLauncher("----%s----\n", JLDEBUG_ENV_ENTRY);

   }

}

jboolean

JLI_IsTraceLauncher()

{

   return _launcher_debug;

}

int

JLI_StrCCmp(const char *s1, const char* s2)

{

   return JLI_StrNCmp(s1, s2, JLI_StrLen(s2));

}

JNIEXPORT JLI_List JNICALL

JLI_List_new(size_t capacity)

{

    JLI_List l = (JLI_List) JLI_MemAlloc(sizeof(struct JLI_List_));

    l->capacity = capacity;

    l->elements = (char **) JLI_MemAlloc(capacity * sizeof(l->elements[0]));

    l->size = 0;

    return l;

}

void

JLI_List_free(JLI_List sl)

{

    if (sl) {

        if (sl->elements) {

            size_t i;

            for (i = 0; i < sl->size; i++)

                JLI_MemFree(sl->elements[i]);

            JLI_MemFree(sl->elements);

        }

        JLI_MemFree(sl);

    }

}

void

JLI_List_ensureCapacity(JLI_List sl, size_t capacity)

{

    if (sl->capacity < capacity) {

        while (sl->capacity < capacity)

            sl->capacity *= 2;

        sl->elements = JLI_MemRealloc(sl->elements,

            sl->capacity * sizeof(sl->elements[0]));

    }

}

JNIEXPORT void JNICALL

JLI_List_add(JLI_List sl, char *str)

{

    JLI_List_ensureCapacity(sl, sl->size+1);

    sl->elements[sl->size++] = str;

}

void

JLI_List_addSubstring(JLI_List sl, const char *beg, size_t len)

{

    char *str = (char *) JLI_MemAlloc(len+1);

    memcpy(str, beg, len);

    str[len] = '\0';

    JLI_List_ensureCapacity(sl, sl->size+1);

    sl->elements[sl->size++] = str;

}

char *

JLI_List_combine(JLI_List sl)

{

    size_t i;

    size_t size;

    char *str;

    char *p;

    for (i = 0, size = 1; i < sl->size; i++)

        size += JLI_StrLen(sl->elements[i]);

    str = JLI_MemAlloc(size);

    for (i = 0, p = str; i < sl->size; i++) {

        size_t len = JLI_StrLen(sl->elements[i]);

        memcpy(p, sl->elements[i], len);

        p += len;

    }

    *p = '\0';

    return str;

}

char *

JLI_List_join(JLI_List sl, char sep)

{

    size_t i;

    size_t size;

    char *str;

    char *p;

    for (i = 0, size = 1; i < sl->size; i++)

        size += JLI_StrLen(sl->elements[i]) + 1;

    str = JLI_MemAlloc(size);

    for (i = 0, p = str; i < sl->size; i++) {

        size_t len = JLI_StrLen(sl->elements[i]);

        if (i > 0) *p++ = sep;

        memcpy(p, sl->elements[i], len);

        p += len;

    }

    *p = '\0';

    return str;

}

JLI_List

JLI_List_split(const char *str, char sep)

{

    const char *p, *q;

    size_t len = JLI_StrLen(str);

    int count;

    JLI_List sl;

    for (count = 1, p = str; p < str + len; p++)

        count += (*p == sep);

    sl = JLI_List_new(count);

    for (p = str;;) {

        for (q = p; q <= str + len; q++) {

            if (*q == sep || *q == '\0') {

                JLI_List_addSubstring(sl, p, q - p);

                if (*q == '\0')

                    return sl;

                p = q + 1;

            }

        }

    }

}