misc/libphysfs/src/platform_posix.c
branchphysfslayer
changeset 8524 a65e9bcf0a03
parent 8522 1853628ae285
child 8526 9f2bd885d773
--- a/misc/libphysfs/src/platform_posix.c	Fri Feb 22 05:15:48 2013 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,479 +0,0 @@
-/*
- * Posix-esque support routines for PhysicsFS.
- *
- * Please see the file LICENSE.txt in the source's root directory.
- *
- *  This file written by Ryan C. Gordon.
- */
-
-/* !!! FIXME: check for EINTR? */
-
-#define __PHYSICSFS_INTERNAL__
-#include "physfs_platforms.h"
-
-#ifdef PHYSFS_PLATFORM_POSIX
-
-#include <unistd.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <pwd.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-
-#if ((!defined PHYSFS_NO_THREAD_SUPPORT) && (!defined PHYSFS_PLATFORM_BEOS))
-#include <pthread.h>
-#endif
-
-#include "physfs_internal.h"
-
-
-static PHYSFS_ErrorCode errcodeFromErrnoError(const int err)
-{
-    switch (err)
-    {
-        case 0: return PHYSFS_ERR_OK;
-        case EACCES: return PHYSFS_ERR_PERMISSION;
-        case EPERM: return PHYSFS_ERR_PERMISSION;
-        case EDQUOT: return PHYSFS_ERR_NO_SPACE;
-        case EIO: return PHYSFS_ERR_IO;
-        case ELOOP: return PHYSFS_ERR_SYMLINK_LOOP;
-        case EMLINK: return PHYSFS_ERR_NO_SPACE;
-        case ENAMETOOLONG: return PHYSFS_ERR_BAD_FILENAME;
-        case ENOENT: return PHYSFS_ERR_NO_SUCH_PATH;
-        case ENOSPC: return PHYSFS_ERR_NO_SPACE;
-        case ENOTDIR: return PHYSFS_ERR_NO_SUCH_PATH;
-        case EISDIR: return PHYSFS_ERR_NOT_A_FILE;
-        case EROFS: return PHYSFS_ERR_READ_ONLY;
-        case ETXTBSY: return PHYSFS_ERR_BUSY;
-        case EBUSY: return PHYSFS_ERR_BUSY;
-        case ENOMEM: return PHYSFS_ERR_OUT_OF_MEMORY;
-        case ENOTEMPTY: return PHYSFS_ERR_DIR_NOT_EMPTY;
-        default: return PHYSFS_ERR_OS_ERROR;
-    } /* switch */
-} /* errcodeFromErrnoError */
-
-
-static inline PHYSFS_ErrorCode errcodeFromErrno(void)
-{
-    return errcodeFromErrnoError(errno);
-} /* errcodeFromErrno */
-
-
-static char *getUserDirByUID(void)
-{
-    uid_t uid = getuid();
-    struct passwd *pw;
-    char *retval = NULL;
-
-    pw = getpwuid(uid);
-    if ((pw != NULL) && (pw->pw_dir != NULL) && (*pw->pw_dir != '\0'))
-    {
-        const size_t dlen = strlen(pw->pw_dir);
-        const size_t add_dirsep = (pw->pw_dir[dlen-1] != '/') ? 1 : 0;
-        retval = (char *) allocator.Malloc(dlen + 1 + add_dirsep);
-        if (retval != NULL)
-        {
-            strcpy(retval, pw->pw_dir);
-            if (add_dirsep)
-            {
-                retval[dlen] = '/';
-                retval[dlen+1] = '\0';
-            } /* if */
-        } /* if */
-    } /* if */
-    
-    return retval;
-} /* getUserDirByUID */
-
-
-char *__PHYSFS_platformCalcUserDir(void)
-{
-    char *retval = NULL;
-    char *envr = getenv("HOME");
-
-    /* if the environment variable was set, make sure it's really a dir. */
-    if (envr != NULL)
-    {
-        struct stat statbuf;
-        if ((stat(envr, &statbuf) != -1) && (S_ISDIR(statbuf.st_mode)))
-        {
-            const size_t envrlen = strlen(envr);
-            const size_t add_dirsep = (envr[envrlen-1] != '/') ? 1 : 0;
-            retval = allocator.Malloc(envrlen + 1 + add_dirsep);
-            if (retval)
-            {
-                strcpy(retval, envr);
-                if (add_dirsep)
-                {
-                    retval[envrlen] = '/';
-                    retval[envrlen+1] = '\0';
-                } /* if */
-            } /* if */
-        } /* if */
-    } /* if */
-
-    if (retval == NULL)
-        retval = getUserDirByUID();
-
-    return retval;
-} /* __PHYSFS_platformCalcUserDir */
-
-
-void __PHYSFS_platformEnumerateFiles(const char *dirname,
-                                     int omitSymLinks,
-                                     PHYSFS_EnumFilesCallback callback,
-                                     const char *origdir,
-                                     void *callbackdata)
-{
-    DIR *dir;
-    struct dirent *ent;
-    int bufsize = 0;
-    char *buf = NULL;
-    int dlen = 0;
-
-    if (omitSymLinks)  /* !!! FIXME: this malloc sucks. */
-    {
-        dlen = strlen(dirname);
-        bufsize = dlen + 256;
-        buf = (char *) allocator.Malloc(bufsize);
-        if (buf == NULL)
-            return;
-        strcpy(buf, dirname);
-        if (buf[dlen - 1] != '/')
-        {
-            buf[dlen++] = '/';
-            buf[dlen] = '\0';
-        } /* if */
-    } /* if */
-
-    errno = 0;
-    dir = opendir(dirname);
-    if (dir == NULL)
-    {
-        allocator.Free(buf);
-        return;
-    } /* if */
-
-    while ((ent = readdir(dir)) != NULL)
-    {
-        if (strcmp(ent->d_name, ".") == 0)
-            continue;
-
-        if (strcmp(ent->d_name, "..") == 0)
-            continue;
-
-        if (omitSymLinks)
-        {
-            PHYSFS_Stat statbuf;
-            int exists = 0;
-            char *p;
-            int len = strlen(ent->d_name) + dlen + 1;
-            if (len > bufsize)
-            {
-                p = (char *) allocator.Realloc(buf, len);
-                if (p == NULL)
-                    continue;
-                buf = p;
-                bufsize = len;
-            } /* if */
-
-            strcpy(buf + dlen, ent->d_name);
-
-            if (!__PHYSFS_platformStat(buf, &exists, &statbuf))
-                continue;
-            else if (!exists)
-                continue;  /* probably can't happen, but just in case. */
-            else if (statbuf.filetype == PHYSFS_FILETYPE_SYMLINK)
-                continue;
-        } /* if */
-
-        callback(callbackdata, origdir, ent->d_name);
-    } /* while */
-
-    allocator.Free(buf);
-    closedir(dir);
-} /* __PHYSFS_platformEnumerateFiles */
-
-
-int __PHYSFS_platformMkDir(const char *path)
-{
-    const int rc = mkdir(path, S_IRWXU);
-    BAIL_IF_MACRO(rc == -1, errcodeFromErrno(), 0);
-    return 1;
-} /* __PHYSFS_platformMkDir */
-
-
-static void *doOpen(const char *filename, int mode)
-{
-    const int appending = (mode & O_APPEND);
-    int fd;
-    int *retval;
-    errno = 0;
-
-    /* O_APPEND doesn't actually behave as we'd like. */
-    mode &= ~O_APPEND;
-
-    fd = open(filename, mode, S_IRUSR | S_IWUSR);
-    BAIL_IF_MACRO(fd < 0, errcodeFromErrno(), NULL);
-
-    if (appending)
-    {
-        if (lseek(fd, 0, SEEK_END) < 0)
-        {
-            const int err = errno;
-            close(fd);
-            BAIL_MACRO(errcodeFromErrnoError(err), NULL);
-        } /* if */
-    } /* if */
-
-    retval = (int *) allocator.Malloc(sizeof (int));
-    if (!retval)
-    {
-        close(fd);
-        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
-    } /* if */
-
-    *retval = fd;
-    return ((void *) retval);
-} /* doOpen */
-
-
-void *__PHYSFS_platformOpenRead(const char *filename)
-{
-    return doOpen(filename, O_RDONLY);
-} /* __PHYSFS_platformOpenRead */
-
-
-void *__PHYSFS_platformOpenWrite(const char *filename)
-{
-    return doOpen(filename, O_WRONLY | O_CREAT | O_TRUNC);
-} /* __PHYSFS_platformOpenWrite */
-
-
-void *__PHYSFS_platformOpenAppend(const char *filename)
-{
-    return doOpen(filename, O_WRONLY | O_CREAT | O_APPEND);
-} /* __PHYSFS_platformOpenAppend */
-
-
-PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buffer,
-                                    PHYSFS_uint64 len)
-{
-    const int fd = *((int *) opaque);
-    ssize_t rc = 0;
-
-    if (!__PHYSFS_ui64FitsAddressSpace(len))
-        BAIL_MACRO(PHYSFS_ERR_INVALID_ARGUMENT, -1);
-
-    rc = read(fd, buffer, (size_t) len);
-    BAIL_IF_MACRO(rc == -1, errcodeFromErrno(), -1);
-    assert(rc >= 0);
-    assert(rc <= len);
-    return (PHYSFS_sint64) rc;
-} /* __PHYSFS_platformRead */
-
-
-PHYSFS_sint64 __PHYSFS_platformWrite(void *opaque, const void *buffer,
-                                     PHYSFS_uint64 len)
-{
-    const int fd = *((int *) opaque);
-    ssize_t rc = 0;
-
-    if (!__PHYSFS_ui64FitsAddressSpace(len))
-        BAIL_MACRO(PHYSFS_ERR_INVALID_ARGUMENT, -1);
-
-    rc = write(fd, (void *) buffer, (size_t) len);
-    BAIL_IF_MACRO(rc == -1, errcodeFromErrno(), rc);
-    assert(rc >= 0);
-    assert(rc <= len);
-    return (PHYSFS_sint64) rc;
-} /* __PHYSFS_platformWrite */
-
-
-int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
-{
-    const int fd = *((int *) opaque);
-    const int rc = lseek(fd, (off_t) pos, SEEK_SET);
-    BAIL_IF_MACRO(rc == -1, errcodeFromErrno(), 0);
-    return 1;
-} /* __PHYSFS_platformSeek */
-
-
-PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
-{
-    const int fd = *((int *) opaque);
-    PHYSFS_sint64 retval;
-    retval = (PHYSFS_sint64) lseek(fd, 0, SEEK_CUR);
-    BAIL_IF_MACRO(retval == -1, errcodeFromErrno(), -1);
-    return retval;
-} /* __PHYSFS_platformTell */
-
-
-PHYSFS_sint64 __PHYSFS_platformFileLength(void *opaque)
-{
-    const int fd = *((int *) opaque);
-    struct stat statbuf;
-    BAIL_IF_MACRO(fstat(fd, &statbuf) == -1, errcodeFromErrno(), -1);
-    return ((PHYSFS_sint64) statbuf.st_size);
-} /* __PHYSFS_platformFileLength */
-
-
-int __PHYSFS_platformFlush(void *opaque)
-{
-    const int fd = *((int *) opaque);
-    BAIL_IF_MACRO(fsync(fd) == -1, errcodeFromErrno(), 0);
-    return 1;
-} /* __PHYSFS_platformFlush */
-
-
-void __PHYSFS_platformClose(void *opaque)
-{
-    const int fd = *((int *) opaque);
-    (void) close(fd);  /* we don't check this. You should have used flush! */
-    allocator.Free(opaque);
-} /* __PHYSFS_platformClose */
-
-
-int __PHYSFS_platformDelete(const char *path)
-{
-    BAIL_IF_MACRO(remove(path) == -1, errcodeFromErrno(), 0);
-    return 1;
-} /* __PHYSFS_platformDelete */
-
-
-int __PHYSFS_platformStat(const char *filename, int *exists, PHYSFS_Stat *st)
-{
-    struct stat statbuf;
-
-    if (lstat(filename, &statbuf) == -1)
-    {
-        *exists = (errno != ENOENT);
-        BAIL_MACRO(errcodeFromErrno(), 0);
-    } /* if */
-
-    *exists = 1;
-
-    if (S_ISREG(statbuf.st_mode))
-    {
-        st->filetype = PHYSFS_FILETYPE_REGULAR;
-        st->filesize = statbuf.st_size;
-    } /* if */
-
-    else if(S_ISDIR(statbuf.st_mode))
-    {
-        st->filetype = PHYSFS_FILETYPE_DIRECTORY;
-        st->filesize = 0;
-    } /* else if */
-
-    else
-    {
-        st->filetype = PHYSFS_FILETYPE_OTHER;
-        st->filesize = statbuf.st_size;
-    } /* else */
-
-    st->modtime = statbuf.st_mtime;
-    st->createtime = statbuf.st_ctime;
-    st->accesstime = statbuf.st_atime;
-
-    /* !!! FIXME: maybe we should just report full permissions? */
-    st->readonly = access(filename, W_OK);
-    return 1;
-} /* __PHYSFS_platformStat */
-
-
-#ifndef PHYSFS_PLATFORM_BEOS  /* BeOS has its own code in platform_beos.cpp */
-#if (defined PHYSFS_NO_THREAD_SUPPORT)
-
-void *__PHYSFS_platformGetThreadID(void) { return ((void *) 0x0001); }
-void *__PHYSFS_platformCreateMutex(void) { return ((void *) 0x0001); }
-void __PHYSFS_platformDestroyMutex(void *mutex) {}
-int __PHYSFS_platformGrabMutex(void *mutex) { return 1; }
-void __PHYSFS_platformReleaseMutex(void *mutex) {}
-
-#else
-
-typedef struct
-{
-    pthread_mutex_t mutex;
-    pthread_t owner;
-    PHYSFS_uint32 count;
-} PthreadMutex;
-
-
-void *__PHYSFS_platformGetThreadID(void)
-{
-    return ( (void *) ((size_t) pthread_self()) );
-} /* __PHYSFS_platformGetThreadID */
-
-
-void *__PHYSFS_platformCreateMutex(void)
-{
-    int rc;
-    PthreadMutex *m = (PthreadMutex *) allocator.Malloc(sizeof (PthreadMutex));
-    BAIL_IF_MACRO(!m, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
-    rc = pthread_mutex_init(&m->mutex, NULL);
-    if (rc != 0)
-    {
-        allocator.Free(m);
-        BAIL_MACRO(PHYSFS_ERR_OS_ERROR, NULL);
-    } /* if */
-
-    m->count = 0;
-    m->owner = (pthread_t) 0xDEADBEEF;
-    return ((void *) m);
-} /* __PHYSFS_platformCreateMutex */
-
-
-void __PHYSFS_platformDestroyMutex(void *mutex)
-{
-    PthreadMutex *m = (PthreadMutex *) mutex;
-
-    /* Destroying a locked mutex is a bug, but we'll try to be helpful. */
-    if ((m->owner == pthread_self()) && (m->count > 0))
-        pthread_mutex_unlock(&m->mutex);
-
-    pthread_mutex_destroy(&m->mutex);
-    allocator.Free(m);
-} /* __PHYSFS_platformDestroyMutex */
-
-
-int __PHYSFS_platformGrabMutex(void *mutex)
-{
-    PthreadMutex *m = (PthreadMutex *) mutex;
-    pthread_t tid = pthread_self();
-    if (m->owner != tid)
-    {
-        if (pthread_mutex_lock(&m->mutex) != 0)
-            return 0;
-        m->owner = tid;
-    } /* if */
-
-    m->count++;
-    return 1;
-} /* __PHYSFS_platformGrabMutex */
-
-
-void __PHYSFS_platformReleaseMutex(void *mutex)
-{
-    PthreadMutex *m = (PthreadMutex *) mutex;
-    assert(m->owner == pthread_self());  /* catch programming errors. */
-    assert(m->count > 0);  /* catch programming errors. */
-    if (m->owner == pthread_self())
-    {
-        if (--m->count == 0)
-        {
-            m->owner = (pthread_t) 0xDEADBEEF;
-            pthread_mutex_unlock(&m->mutex);
-        } /* if */
-    } /* if */
-} /* __PHYSFS_platformReleaseMutex */
-
-#endif /* !PHYSFS_NO_THREAD_SUPPORT */
-#endif /* !PHYSFS_PLATFORM_BEOS */
-
-#endif  /* PHYSFS_PLATFORM_POSIX */
-
-/* end of posix.c ... */
-