1 files changed, 144 insertions, 0 deletions

diff --git a/fs/hpfs/name.c b/fs/hpfs/name.c
new file mode 100644
index 000000000000..1f4a964384eb
--- /dev/null
+++ b/fs/hpfs/name.c
@@ -0,0 +1,144 @@
+/*
+ *  linux/fs/hpfs/name.c
+ *
+ *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ *  operations with filenames
+ */
+
+#include "hpfs_fn.h"
+
+static char *text_postfix[]={
+".ASM", ".BAS", ".BAT", ".C", ".CC", ".CFG", ".CMD", ".CON", ".CPP", ".DEF",
+".DOC", ".DPR", ".ERX", ".H", ".HPP", ".HTM", ".HTML", ".JAVA", ".LOG", ".PAS",
+".RC", ".TEX", ".TXT", ".Y", ""};
+
+static char *text_prefix[]={
+"AUTOEXEC.", "CHANGES", "COPYING", "CONFIG.", "CREDITS", "FAQ", "FILE_ID.DIZ",
+"MAKEFILE", "READ.ME", "README", "TERMCAP", ""};
+
+void hpfs_decide_conv(struct inode *inode, unsigned char *name, unsigned len)
+{
+        struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+        int i;
+        if (hpfs_inode->i_conv != CONV_AUTO) return;
+        for (i = 0; *text_postfix[i]; i++) {
+                int l = strlen(text_postfix[i]);
+                if (l <= len)
+                        if (!hpfs_compare_names(inode->i_sb, text_postfix[i], l, name + len - l, l, 0))
+                                goto text;
+        }
+        for (i = 0; *text_prefix[i]; i++) {
+                int l = strlen(text_prefix[i]);
+                if (l <= len)
+                        if (!hpfs_compare_names(inode->i_sb, text_prefix[i], l, name, l, 0))
+                                goto text;
+        }
+        hpfs_inode->i_conv = CONV_BINARY;
+        return;
+        text:
+        hpfs_inode->i_conv = CONV_TEXT;
+        return;
+}
+
+static inline int not_allowed_char(unsigned char c)
+{
+        return c<' ' || c=='"' || c=='*' || c=='/' || c==':' || c=='<' ||
+              c=='>' || c=='?' || c=='\\' || c=='|';
+}
+
+static inline int no_dos_char(unsigned char c)
+{       /* Characters that are allowed in HPFS but not in DOS */
+        return c=='+' || c==',' || c==';' || c=='=' || c=='[' || c==']';
+}
+
+static inline unsigned char upcase(unsigned char *dir, unsigned char a)
+{
+        if (a<128 || a==255) return a>='a' && a<='z' ? a - 0x20 : a;
+        if (!dir) return a;
+        return dir[a-128];
+}
+
+unsigned char hpfs_upcase(unsigned char *dir, unsigned char a)
+{
+        return upcase(dir, a);
+}
+
+static inline unsigned char locase(unsigned char *dir, unsigned char a)
+{
+        if (a<128 || a==255) return a>='A' && a<='Z' ? a + 0x20 : a;
+        if (!dir) return a;
+        return dir[a];
+}
+
+int hpfs_chk_name(unsigned char *name, unsigned *len)
+{
+        int i;
+        if (*len > 254) return -ENAMETOOLONG;
+        hpfs_adjust_length(name, len);
+        if (!*len) return -EINVAL;
+        for (i = 0; i < *len; i++) if (not_allowed_char(name[i])) return -EINVAL;
+        if (*len == 1) if (name[0] == '.') return -EINVAL;
+        if (*len == 2) if (name[0] == '.' && name[1] == '.') return -EINVAL;
+        return 0;
+}
+
+char *hpfs_translate_name(struct super_block *s, unsigned char *from,
+                          unsigned len, int lc, int lng)
+{
+        char *to;
+        int i;
+        if (hpfs_sb(s)->sb_chk >= 2) if (hpfs_is_name_long(from, len) != lng) {
+                printk("HPFS: Long name flag mismatch - name ");
+                for (i=0; i<len; i++) printk("%c", from[i]);
+                printk(" misidentified as %s.\n", lng ? "short" : "long");
+                printk("HPFS: It's nothing serious. It could happen because of bug in OS/2.\nHPFS: Set checks=normal to disable this message.\n");
+        }
+        if (!lc) return from;
+        if (!(to = kmalloc(len, GFP_KERNEL))) {
+                printk("HPFS: can't allocate memory for name conversion buffer\n");
+                return from;
+        }
+        for (i = 0; i < len; i++) to[i] = locase(hpfs_sb(s)->sb_cp_table,from[i]);
+        return to;
+}
+
+int hpfs_compare_names(struct super_block *s, unsigned char *n1, unsigned l1,
+                       unsigned char *n2, unsigned l2, int last)
+{
+        unsigned l = l1 < l2 ? l1 : l2;
+        unsigned i;
+        if (last) return -1;
+        for (i = 0; i < l; i++) {
+                unsigned char c1 = upcase(hpfs_sb(s)->sb_cp_table,n1[i]);
+                unsigned char c2 = upcase(hpfs_sb(s)->sb_cp_table,n2[i]);
+                if (c1 < c2) return -1;
+                if (c1 > c2) return 1;
+        }
+        if (l1 < l2) return -1;
+        if (l1 > l2) return 1;
+        return 0;
+}
+
+int hpfs_is_name_long(unsigned char *name, unsigned len)
+{
+        int i,j;
+        for (i = 0; i < len && name[i] != '.'; i++)
+                if (no_dos_char(name[i])) return 1;
+        if (!i || i > 8) return 1;
+        if (i == len) return 0;
+        for (j = i + 1; j < len; j++)
+                if (name[j] == '.' || no_dos_char(name[i])) return 1;
+        return j - i > 4;
+}
+
+/* OS/2 clears dots and spaces at the end of file name, so we have to */
+
+void hpfs_adjust_length(unsigned char *name, unsigned *len)
+{
+        if (!*len) return;
+        if (*len == 1 && name[0] == '.') return;
+        if (*len == 2 && name[0] == '.' && name[1] == '.') return;
+        while (*len && (name[*len - 1] == '.' || name[*len - 1] == ' '))
+                (*len)--;
+}