root/lib/libdpv/dpv.h
/*-
 * Copyright (c) 2013-2016 Devin Teske <dteske@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _DPV_H_
#define _DPV_H_

#include <sys/types.h>

#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif

/* localeconv(3) */
#define LC_NUMERIC_DEFAULT      "en_US.ISO8859-1"

/* Data to process */
extern long long dpv_overall_read;

/* Interrupt flag */
extern int dpv_interrupt;       /* Set to TRUE in interrupt handler */
extern int dpv_abort;           /* Set to true in callback to abort */

/*
 * Display types for use with display_type member of dpv_config structure
 */
enum dpv_display {
        DPV_DISPLAY_LIBDIALOG = 0,      /* Display using dialog(3) (default) */
        DPV_DISPLAY_STDOUT,             /* Display on stdout */
        DPV_DISPLAY_DIALOG,             /* Display using spawned dialog(1) */
        DPV_DISPLAY_XDIALOG,            /* Display using spawned Xdialog(1) */
};

/*
 * Output types for use with output_type member of dpv_config structure
 */
enum dpv_output {
        DPV_OUTPUT_NONE = 0,    /* No output (default) */
        DPV_OUTPUT_FILE,        /* Read `output' member as file path */
        DPV_OUTPUT_SHELL,       /* Read `output' member as shell cmd */
};

/*
 * Activity types for use with status member of dpv_file_node structure.
 * If you set a status other than DPV_STATUS_RUNNING on the current file in the
 * action callback of dpv_config structure, you'll end callbacks for that
 * dpv_file_node.
 */
enum dpv_status {
        DPV_STATUS_RUNNING = 0, /* Running (default) */
        DPV_STATUS_DONE,        /* Completed */
        DPV_STATUS_FAILED,      /* Oops, something went wrong */
};

/*
 * Anatomy of file option; pass an array of these as dpv() file_list argument
 * terminated with a NULL pointer.
 */
struct dpv_file_node {
        enum dpv_status         status; /* status of read operation */
        char                    *msg;   /* display instead of "Done/Fail" */
        char                    *name;  /* name of file to read */
        char                    *path;  /* path to file */
        long long               length; /* expected size */
        long long               read;   /* number units read (e.g., bytes) */
        struct dpv_file_node    *next;  /* pointer to next (end with NULL) */
};

/*
 * Anatomy of config option to pass as dpv() config argument
 */
struct dpv_config {
        uint8_t keep_tite;              /* Prevent visually distracting exit */
        enum dpv_display display_type;  /* Display (default TYPE_LIBDIALOG) */
        enum dpv_output  output_type;   /* Output (default TYPE_NONE) */
        int     debug;                  /* Enable debugging output on stderr */
        int     display_limit;          /* Files per `page'. Default -1 */
        int     label_size;             /* Label size. Default 28 */
        int     pbar_size;              /* Mini-progress size. See dpv(3) */
        int     dialog_updates_per_second; /* Progress updates/s. Default 16 */
        int     status_updates_per_second; /* dialog(3) status updates/second.
                                            * Default 2 */
        uint16_t options;       /* Special options. Default 0 */
        char    *title;         /* widget title */
        char    *backtitle;     /* Widget backtitle */
        char    *aprompt;       /* Prompt append. Default NULL */
        char    *pprompt;       /* Prompt prefix. Default NULL */
        char    *msg_done;      /* Progress text. Default `Done' */
        char    *msg_fail;      /* Progress text. Default `Fail' */
        char    *msg_pending;   /* Progress text. Default `Pending' */
        char    *output;        /* Output format string; see dpv(3) */
        const char *status_solo; /* dialog(3) solo-status format.
                                  * Default DPV_STATUS_SOLO */
        const char *status_many; /* dialog(3) many-status format.
                                  * Default DPV_STATUS_MANY */

        /*
         * Function pointer; action to perform data transfer
         */
        int (*action)(struct dpv_file_node *file, int out);
};

/*
 * Macros for dpv() options bitmask argument
 */
#define DPV_TEST_MODE           0x0001  /* Test mode (fake reading data) */
#define DPV_WIDE_MODE           0x0002  /* prefix/append bump dialog width */
#define DPV_NO_LABELS           0x0004  /* Hide file_node.name labels */
#define DPV_USE_COLOR           0x0008  /* Override to force color output */
#define DPV_NO_OVERRUN          0x0010  /* Stop transfers when they hit 100% */

/*
 * Limits (modify with extreme care)
 */
#define DPV_APROMPT_MAX         4096    /* Buffer size for `-a text' */
#define DPV_DISPLAY_LIMIT       10      /* Max file progress lines */
#define DPV_PPROMPT_MAX         4096    /* Buffer size for `-p text' */
#define DPV_STATUS_FORMAT_MAX   80      /* Buffer size for `-u format' */

/*
 * Extra display information
 */
#define DPV_STATUS_SOLO         "%'10lli bytes read @ %'9.1f bytes/sec."
#define DPV_STATUS_MANY         (DPV_STATUS_SOLO " [%i/%i busy/wait]")

/*
 * Strings
 */
#define DPV_DONE_DEFAULT        "Done"
#define DPV_FAIL_DEFAULT        "Fail"
#define DPV_PENDING_DEFAULT     "Pending"

__BEGIN_DECLS
void    dpv_free(void);
int     dpv(struct dpv_config *_config, struct dpv_file_node *_file_list);
__END_DECLS

#endif /* !_DPV_H_ */