release/src/router/vsftpd/ascii.h

   1 #ifndef VSFTP_ASCII_H
   2 #define VSFTP_ASCII_H
   3
   4 struct mystr;
   5
   6 /* vsf_ascii_ascii_to_bin()
   7  * PURPOSE
   8  * This function converts an input buffer from ascii format to binary format.
   9  * This entails ripping out all occurences of '\r' that are followed by '\n'.
  10  *  The result is stored in "p_out".
  11  * PARAMETERS
  12  * p_in         - the input and output buffer, which MUST BE at least as big as
  13  *                "in_len" PLUS ONE. This is to cater for a leading '\r' in the
  14  *                buffer if certain conditions are met.
  15  * in_len       - the length in bytes of the  buffer.
  16  * prev_cr      - set to non-zero if this buffer fragment was immediately
  17  *                preceeded by a '\r'.
  18  * RETURNS
  19  * The number of characters stored in the buffer, the buffer address, and
  20  * if we ended on a '\r'.
  21  */
  22 struct ascii_to_bin_ret
  23 {
  24   unsigned int stored;
  25   int last_was_cr;
  26   char* p_buf;
  27 };
  28 struct ascii_to_bin_ret vsf_ascii_ascii_to_bin(
  29   char* p_in, unsigned int in_len, int prev_cr);
  30
  31 /* vsf_ascii_bin_to_ascii()
  32  * PURPOSE
  33  * This function converts an input buffer from binary format to ascii format.
  34  * This entails replacing all occurences of '\n' with '\r\n'. The result is
  35  * stored in "p_out".
  36  * PARAMETERS
  37  * p_in         - the input buffer, which is not modified
  38  * p_out        - the output buffer, which MUST BE at least TWICE as big as
  39  *                "in_len"
  40  * in_len       - the length in bytes of the input buffer
  41  * prev_cr      - set to non-zero if this buffer fragment was immediately
  42  *                preceeded by a '\r'.
  43  * RETURNS
  44  * The number of characters stored in the output buffer, and whether the last
  45  * character stored was '\r'.
  46  */
  47 struct bin_to_ascii_ret
  48 {
  49   unsigned int stored;
  50   int last_was_cr;
  51 };
  52 struct bin_to_ascii_ret vsf_ascii_bin_to_ascii(const char* p_in,
  53                                                char* p_out,
  54                                                unsigned int in_len,
  55                                                int prev_cr);
  56
  57 #endif /* VSFTP_ASCII_H */
  58