psftag.h

/////////////////////////////////////////////////////////////////////////////
//
// tag handling
//
/////////////////////////////////////////////////////////////////////////////

#ifndef __PSF_PSFTAG_H__
#define __PSF_PSFTAG_H__

#ifdef __cplusplus
extern "C" {
#endif

    void *psftag_create(void);
    void  psftag_delete(void *psftag);

    int psftag_readfromfile(void *psftag, const char *path);
    int psftag_writetofile(void *psftag, const char *path);
    const char *psftag_getlasterror(void *psftag);

//
// Retrieve a tag variable.
// Guarantees null termination of output.
// Returns 0 if the variable was found
// Otherwise, returns -1 and sets the output to an empty terminated string
//
    int psftag_getvar(void *psftag, const char *variable, char *value_out, int value_out_size);

//
// Set a tag variable.
//
    void psftag_setvar(void *psftag, const char *variable, const char *value);

    void psftag_getraw(void *psftag, char *raw_out, int raw_out_size);
    void psftag_setraw(void *psftag, const char *raw_in);

//
// Retrieve a tag variable. The input tag data must be null-terminated.
// Guarantees null termination of output.
// Returns 0 if the variable was found
// Otherwise, returns -1 and sets the output to an empty terminated string
//
    int psftag_raw_getvar(const char *tag, const char *variable, char *value_out, int value_out_size);

//
// Set a tag variable.
// Provide the maximum growable tag size _including_ space for the null terminator.
// Note that this function assumes it can overwrite *tag up to the length of the
// existing string, regardless of tag_max_size.
//
    void psftag_raw_setvar(char *tag, int tag_max_size, const char *variable, const char *value);

#ifdef __cplusplus
}
#endif

#endif