jdk/src/solaris/instrument/FileSystemSupport_md.c
author duke
Wed, 05 Jul 2017 16:45:59 +0200
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parent 2 90ce3da70b43
child 5506 202f599c92aa
permissions -rw-r--r--
Merge
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/*
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 * Copyright 2004 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Sun designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Sun in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 */
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#include <stdlib.h>
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#include <string.h>
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#include "FileSystemSupport_md.h"
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/*
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 * Solaris/Linux implementation of the file system support functions.
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 */
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#define slash           '/'
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char pathSeparator() {
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    return ':';
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}
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/* Filenames are case senstitive */
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int filenameStrcmp(const char* s1, const char* s2) {
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  return strcmp(s1, s2);
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}
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char* basePath(const char* path) {
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    char* last = strrchr(path, slash);
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    if (last == NULL) {
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        return (char*)path;
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    } else {
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        int len = last - path;
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        char* str = (char*)malloc(len+1);
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        if (len > 0) {
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            memcpy(str, path, len);
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        }
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        str[len] = '\0';
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        return str;
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    }
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}
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int isAbsolute(const char* path) {
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    return (path[0] == slash) ? 1 : 0;
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}
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/* Ported from src/solaris/classes/java/io/UnixFileSystem.java */
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/* A normal Unix pathname contains no duplicate slashes and does not end
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   with a slash.  It may be the empty string. */
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/* Normalize the given pathname, whose length is len, starting at the given
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   offset; everything before this offset is already normal. */
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static char* normalizePath(const char* pathname, int len, int off) {
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    char* sb;
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    int sbLen, i, n;
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    char prevChar;
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    if (len == 0) return (char*)pathname;
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    n = len;
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    while ((n > 0) && (pathname[n - 1] == slash)) n--;
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    if (n == 0) return strdup("/");
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    sb = (char*)malloc(strlen(pathname)+1);
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    sbLen = 0;
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    if (off > 0) {
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        memcpy(sb, pathname, off);
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        sbLen = off;
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    }
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    prevChar = 0;
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    for (i = off; i < n; i++) {
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        char c = pathname[i];
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        if ((prevChar == slash) && (c == slash)) continue;
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        sb[sbLen++] = c;
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        prevChar = c;
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    }
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    return sb;
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}
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/* Check that the given pathname is normal.  If not, invoke the real
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   normalizer on the part of the pathname that requires normalization.
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   This way we iterate through the whole pathname string only once. */
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char* normalize(const char* pathname) {
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    int i;
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    int n = strlen(pathname);
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    char prevChar = 0;
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    for (i = 0; i < n; i++) {
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        char c = pathname[i];
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        if ((prevChar == slash) && (c == slash))
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            return normalizePath(pathname, n, i - 1);
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        prevChar = c;
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    }
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    if (prevChar == slash) return normalizePath(pathname, n, n - 1);
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    return (char*)pathname;
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}
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char* resolve(const char* parent, const char* child) {
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    int len;
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    char* theChars;
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    int pn = strlen(parent);
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    int cn = strlen(child);
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    int childStart = 0;
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    int parentEnd = pn;
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    if (pn > 0 && parent[pn-1] == slash) {
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        parentEnd--;
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    }
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    len = parentEnd + cn - childStart;
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    if (child[0] == slash) {
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        theChars = (char*)malloc(len+1);
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        if (parentEnd > 0)
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            memcpy(theChars, parent, parentEnd);
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        if (cn > 0)
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            memcpy(theChars+parentEnd, child, cn);
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        theChars[len] = '\0';
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    } else {
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        theChars = (char*)malloc(len+2);
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        if (parentEnd > 0)
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            memcpy(theChars, parent, parentEnd);
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        theChars[parentEnd] = slash;
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        if (cn > 0)
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            memcpy(theChars+parentEnd+1, child, cn);
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        theChars[len+1] = '\0';
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    }
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    return theChars;
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}
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char* fromURIPath(const char* path) {
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    int len = strlen(path);
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    if (len > 1 && path[len-1] == slash) {
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        // "/foo/" --> "/foo", but "/" --> "/"
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        char* str = (char*)malloc(len);
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        if (str != NULL) {
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            memcpy(str, path, len-1);
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            str[len-1] = '\0';
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        }
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        return str;
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    } else {
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        return (char*)path;
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    }
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}