LXR linux-bk/include/linux/seq

   1#ifndef _LINUX_SEQ_FILE_H
   2#define _LINUX_SEQ_FILE_H
   3#ifdef __KERNEL__
   4
   5#include <linux/types.h>
   6#include <linux/string.h>
   7#include <asm/semaphore.h>
   8
   9struct seq_operations;
  10struct file;
  11struct vfsmount;
  12struct dentry;
  13struct inode;
  14
  15struct seq_file {
  16        char *buf;
  17        size_t size;
  18        size_t from;
  19        size_t count;
  20        loff_t index;
  21        struct semaphore sem;
  22        struct seq_operations *op;
  23        void *private;
  24};
  25
  26struct seq_operations {
  27        void * (*start) (struct seq_file *m, loff_t *pos);
  28        void (*stop) (struct seq_file *m, void *v);
  29        void * (*next) (struct seq_file *m, void *v, loff_t *pos);
  30        int (*show) (struct seq_file *m, void *v);
  31};
  32
  33int seq_open(struct file *, struct seq_operations *);
  34ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
  35loff_t seq_lseek(struct file *, loff_t, int);
  36int seq_release(struct inode *, struct file *);
  37int seq_escape(struct seq_file *, const char *, const char *);
  38
  39static inline int seq_putc(struct seq_file *m, char c)
  40{
  41        if (m->count < m->size) {
  42                m->buf[m->count++] = c;
  43                return 0;
  44        }
  45        return -1;
  46}
  47
  48static inline int seq_puts(struct seq_file *m, const char *s)
  49{
  50        int len = strlen(s);
  51        if (m->count + len < m->size) {
  52                memcpy(m->buf + m->count, s, len);
  53                m->count += len;
  54                return 0;
  55        }
  56        m->count = m->size;
  57        return -1;
  58}
  59
  60int seq_printf(struct seq_file *, const char *, ...)
  61        __attribute__ ((format (printf,2,3)));
  62
  63int seq_path(struct seq_file *, struct vfsmount *, struct dentry *, char *);
  64
  65int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
  66int single_release(struct inode *, struct file *);
  67int seq_release_private(struct inode *, struct file *);
  68
  69#define SEQ_START_TOKEN ((void *)1)
  70
  71#endif
  72#endif
  73