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bbuf.c File Reference

Functions
wmf_error_t	wmf_bbuf_input (wmfAPI *API, wmfRead fp_read, wmfSeek fp_seek, wmfTell fp_tell, void *user_data)
wmf_error_t	wmf_file_open (wmfAPI *API, const char *file)
wmf_error_t	wmf_file_close (wmfAPI *API)
int	wmf_file_read (void *user_data)
int	wmf_file_seek (void *user_data, long pos)
long	wmf_file_tell (void *user_data)
wmf_error_t	wmf_mem_open (wmfAPI *API, unsigned char *mem, long length)
wmf_error_t	wmf_mem_close (wmfAPI *API)
int	wmf_mem_read (void *user_data)
int	wmf_mem_seek (void *user_data, long pos)
long	wmf_mem_tell (void *user_data)

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Function Documentation

wmf_error_t wmf_bbuf_input (  wmfAPI *    API, wmfRead    fp_read, wmfSeek    fp_seek, wmfTell    fp_tell, void *    user_data )

Set custom metafile input-stream handler functions. Parameters: API  the API handle fp_read  function to read a byte fp_seek  function to set position fp_tell  function to get position user_data  handle for user data libwmf has simple methods for reading either from file or from memory, but many applications will want to use customized variants of these. wmf_bbuf_input() enables this. typedef int (*wmfRead) (void* user_data); typedef int (*wmfSeek) (void* user_data,long position); typedef long (*wmfTell) (void* user_data); wmfRead returns unsigned char cast to int, or EOF (cf. fgetc()) wmfSeek returns (-1) on error, otherwise 0 (cf. fseek()) wmfTell returns (-1) on error, otherwise current position (cf. ftell()) Returns: Returns the library error state (wmf_E_None on success). Possible library error state of wmf_E_Glitch, if any of the three functions is zero.

wmf_error_t wmf_file_close (  wmfAPI *    API )

Close metafile input file stream. Parameters: API  the API handle Returns: Returns the library error state (wmf_E_None on success). Possible library error state of wmf_E_Glitch.

wmf_error_t wmf_file_open (  wmfAPI *    API, const char *    file )

Open file as metafile. Parameters: API  the API handle file  file name Simple method for reading from file. Returns: Returns the library error state (wmf_E_None on success). Possible library error states of wmf_E_Glitch or wmf_E_BadFile.

int wmf_file_read (  void *    )

file input (wmf_file_open): fgetc()

int wmf_file_seek (  void *   , long    )

file input (wmf_file_open): fseek()

long wmf_file_tell (  void *    )

file input (wmf_file_open): ftell()

wmf_error_t wmf_mem_close (  wmfAPI *    API )

Close metafile input memory stream. Parameters: API  the API handle Returns: Returns the library error state (wmf_E_None on success).

wmf_error_t wmf_mem_open (  wmfAPI *    API, unsigned char *    mem, long    length )

Open metafile in memory. Parameters: API  the API handle mem  the metafile in memory length  the length in bytes of metafile data Simple method for reading from memory as array of unsigned char. Returns: Returns the library error state (wmf_E_None on success). Possible library error state of wmf_E_Glitch.

int wmf_mem_read (  void *    )

memory input (wmf_mem_open): fgetc() equiv.

int wmf_mem_seek (  void *   , long    )

memory input (wmf_mem_open): fseek() equiv.

long wmf_mem_tell (  void *    )

memory input (wmf_mem_open): ftell() equiv.

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