Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / fs / fat / file.c

diff --git a/qemu/roms/u-boot/fs/fat/file.c b/qemu/roms/u-boot/fs/fat/file.c
new file mode 100644 (file)
index 0000000..d910c46
--- /dev/null
+++ b/qemu/roms/u-boot/fs/fat/file.c
@@ -0,0 +1,184 @@
+/*
+ * file.c
+ *
+ * Mini "VFS" by Marcus Sundberg
+ *
+ * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
+ * 2003-03-10 - kharris@nexus-tech.net - ported to uboot
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <config.h>
+#include <malloc.h>
+#include <fat.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+
+/* Supported filesystems */
+static const struct filesystem filesystems[] = {
+       { file_fat_detectfs,  file_fat_ls,  file_fat_read,  "FAT" },
+};
+#define NUM_FILESYS    (sizeof(filesystems)/sizeof(struct filesystem))
+
+/* The filesystem which was last detected */
+static int current_filesystem = FSTYPE_NONE;
+
+/* The current working directory */
+#define CWD_LEN                511
+char file_cwd[CWD_LEN+1] = "/";
+
+const char *
+file_getfsname(int idx)
+{
+       if (idx < 0 || idx >= NUM_FILESYS)
+               return NULL;
+
+       return filesystems[idx].name;
+}
+
+static void
+pathcpy(char *dest, const char *src)
+{
+       char *origdest = dest;
+
+       do {
+               if (dest-file_cwd >= CWD_LEN) {
+                       *dest = '\0';
+                       return;
+               }
+               *(dest) = *(src);
+               if (*src == '\0') {
+                       if (dest-- != origdest && ISDIRDELIM(*dest)) {
+                               *dest = '\0';
+                       }
+                       return;
+               }
+               ++dest;
+
+               if (ISDIRDELIM(*src))
+                       while (ISDIRDELIM(*src)) src++;
+               else
+                       src++;
+       } while (1);
+}
+
+int
+file_cd(const char *path)
+{
+       if (ISDIRDELIM(*path)) {
+               while (ISDIRDELIM(*path)) path++;
+               strncpy(file_cwd+1, path, CWD_LEN-1);
+       } else {
+               const char *origpath = path;
+               char *tmpstr = file_cwd;
+               int back = 0;
+
+               while (*tmpstr != '\0') tmpstr++;
+               do {
+                       tmpstr--;
+               } while (ISDIRDELIM(*tmpstr));
+
+               while (*path == '.') {
+                       path++;
+                       while (*path == '.') {
+                               path++;
+                               back++;
+                       }
+                       if (*path != '\0' && !ISDIRDELIM(*path)) {
+                               path = origpath;
+                               back = 0;
+                               break;
+                       }
+                       while (ISDIRDELIM(*path)) path++;
+                       origpath = path;
+               }
+
+               while (back--) {
+                       /* Strip off path component */
+                       while (!ISDIRDELIM(*tmpstr)) {
+                               tmpstr--;
+                       }
+                       if (tmpstr == file_cwd) {
+                               /* Incremented again right after the loop. */
+                               tmpstr--;
+                               break;
+                       }
+                       /* Skip delimiters */
+                       while (ISDIRDELIM(*tmpstr)) tmpstr--;
+               }
+               tmpstr++;
+               if (*path == '\0') {
+                       if (tmpstr == file_cwd) {
+                               *tmpstr = '/';
+                               tmpstr++;
+                       }
+                       *tmpstr = '\0';
+                       return 0;
+               }
+               *tmpstr = '/';
+               pathcpy(tmpstr+1, path);
+       }
+
+       return 0;
+}
+
+int
+file_detectfs(void)
+{
+       int i;
+
+       current_filesystem = FSTYPE_NONE;
+
+       for (i = 0; i < NUM_FILESYS; i++) {
+               if (filesystems[i].detect() == 0) {
+                       strcpy(file_cwd, "/");
+                       current_filesystem = i;
+                       break;
+               }
+       }
+
+       return current_filesystem;
+}
+
+int
+file_ls(const char *dir)
+{
+       char fullpath[1024];
+       const char *arg;
+
+       if (current_filesystem == FSTYPE_NONE) {
+               printf("Can't list files without a filesystem!\n");
+               return -1;
+       }
+
+       if (ISDIRDELIM(*dir)) {
+               arg = dir;
+       } else {
+               sprintf(fullpath, "%s/%s", file_cwd, dir);
+               arg = fullpath;
+       }
+       return filesystems[current_filesystem].ls(arg);
+}
+
+long
+file_read(const char *filename, void *buffer, unsigned long maxsize)
+{
+       char fullpath[1024];
+       const char *arg;
+
+       if (current_filesystem == FSTYPE_NONE) {
+               printf("Can't load file without a filesystem!\n");
+               return -1;
+       }
+
+       if (ISDIRDELIM(*filename)) {
+               arg = filename;
+       } else {
+               sprintf(fullpath, "%s/%s", file_cwd, filename);
+               arg = fullpath;
+       }
+
+       return filesystems[current_filesystem].read(arg, buffer, maxsize);
+}