source: bootcd/isolinux/syslinux-6.03/com32/modules/cptime.c @ 26ffad7

/* ----------------------------------------------------------------------- *
 *
 *   Copyright 2010-2011 Gene Cumm
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
 *   Boston MA 02111-1307, USA; either version 2 of the License, or
 *   (at your option) any later version; incorporated herein by reference.
 *
 * ----------------------------------------------------------------------- */

/*
 * cptime.c     Version 1.4
 *
 * Timed copy; read entire file then output total time, bytes transferred,
 * and compute transfer rate.
 *
 * cptime [-s|-l] [-v|-q] [-b _SIZE_] [-n _LEN_] _FILE_...
 *      -s      Change to simple output mode without computing transfer rate
 *      -l      Change to long output mode (to allow for overriding previous -s)
 *      -v      Verbose output
 *      -q      Quiet output
 *      -b _SIZE_       use _SIZE_ for transfer size
 *      -n _LEN_        maximum length to fetch
 *      _FILE_...       Space delimited list of files to dump
 * Note: The last instance of -s or -l wins, along with the last use of -b and -n and the winning option will be applied to all operations
 *
 * Hisory:
 * 1.4  Use fread() rather than read(); use CLK_TCK when available.
 * 1.3  Added -v/-q; rework some argument processing.
 * 1.2  Added -n
 * 1.1  Added -l and -b switches; more flexible command line processing
 * 1.0  First release
 */

/*
 * ToDos:
 * - Refine timing to be more precise.  Low priority.
 * - Add -o for offset.  Wishlist.
 */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/times.h>
#include <consoles.h>
#include <minmax.h>
#include <limits.h>
#include <string.h>
#include <stdint.h>
#include <console.h>

#ifdef __COM32__
#  define BUFSZ_DEF     (size_t)2048
/* What's optimal?  Under 4k?
 *      layout.inc: xfer_buf_seg        equ 1000h
 *      com32.inc: push dword (1 << 16)         ; 64K bounce buffer
 */
/* typedef size_t off_t */

#  define TPS_T float
#  ifdef CLK_TCK
static inline TPS_T get_tps(void) {     return CLK_TCK; }
#  else
static inline TPS_T get_tps(void) {     return 18.2;    }
#  endif

#else /* __COM32__ */

#  define BUFSZ_DEF     (size_t)16384
/* Need to check what might be a "best" buffer/fetch block size here */

#  define TPS_T long
static inline TPS_T get_tps(void) {     return sysconf(_SC_CLK_TCK);    }

#endif /* __COM32__ */

#ifndef SSIZE_MAX
#  define SSIZE_MAX     PTRDIFF_MAX
#endif
/* typedef ptrdiff_t ssize_t; */
#define BUFSZ_MAX       (size_t)SSIZE_MAX
/* ssize_t max */
#define BUFSZ_MIN       (size_t)1


/* Please note: I don't know the origin of these two macros nor their license */
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
#define TYPE_MAX(t) \
  ((t) (! TYPE_SIGNED (t) \
        ? (t) -1 \
        : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))

#ifndef OFF_T_MAX
#  define OFF_T_MAX     TYPE_MAX(off_t)
#endif
/* Can't be SIZE_MAX or SSIZE_MAX as Syslinux/COM32 is unsigned while Linux 
 * is signed.
 */

#define LEN_MAX         OFF_T_MAX
/* off_t max */
#define LEN_MIN         (off_t)0

void print_cp_result_tick(size_t bcnt, clock_t et, TPS_T tps, int offs)
{
        size_t dr;
        /* prevent divide by 0 */
        dr = max(bcnt, (bcnt * tps)) / max((clock_t)1, (et + offs));
        printf("  %+d %zu B/s; %zu KiB/s; %zu MiB/s\n", offs, dr, dr/1024, dr/1048576);
}       /* void print_cp_result_tick(size_t bcnt, clock_t et, TPS_T tps, int offs) */

void print_cp_result_long(char *fn, size_t bcnt, clock_t bc, clock_t ec, size_t bufsz, char do_verbose)
{
        TPS_T tps;
        if (do_verbose > 2)
                printf("Enter print_cp_result_long()\n");
        tps = get_tps();
        printf("  %zu B in %d ticks from '%s'\n", bcnt, (int)(ec - bc), fn);
        printf("  ~%d ticks per second; %zu B block/transfer size\n", (int)tps, bufsz);
        print_cp_result_tick(bcnt, (ec - bc), tps, 0);
        print_cp_result_tick(bcnt, (ec - bc), tps, 1);
        print_cp_result_tick(bcnt, (ec - bc), tps, -1);
}       /* void print_cp_result_long(char *fn, size_t bcnt, clock_t bc, clock_t ec, size_t bufsz) */

void print_cp_result_simple(char *fn, size_t bcnt, clock_t bc, clock_t ec, size_t bufsz, char do_verbose)
{
        if (do_verbose) {}
        printf("  %zuB  %dt %zux '%s'\n", bcnt, (int)(ec - bc), bufsz, fn);
}       /* void print_cp_result_simple(char *fn, int bcnt, clock_t bc, clock_t ec, char do_verbose) */

size_t time_copy_bufsz(size_t bufsz, size_t bcnt, off_t maxlen)
{
        return min(bufsz, (maxlen - bcnt));
}       /* size_t time_copy_bufsz(size_t bufsz, size_t bcnt, off_t maxlen) */

int time_copy(char *fn, char do_simple, char do_verbose, size_t ibufsz, off_t maxlen)
{
//      int fd;
        int rv = 0;
        int i = 0;
        FILE *f;
        size_t bufsz, bcnt = 0;
        int numrd;
        struct tms tm;
        clock_t bc, ec;
        char buf[ibufsz + 1];

        buf[0] = 0;
        if (do_verbose)
                printf("Trying file '%s'\n", fn);
        errno = 0;
//      fd = open(fn, O_RDONLY);
        f = fopen(fn, "r");
//      if (fd == -1) {
        if (!f) {
                switch (errno) {
                case ENOENT :
                        printf("File '%s' does not exist\n", fn);
                        break;
                case EBADF:
                        printf("File '%s': Bad File Descriptor\n", fn);
                        break;
                default :
                        printf("Error '%d' opening file '%s'\n", errno, fn);
                }
                rv = 1;
        } else {
                if (do_verbose)
                        printf("File '%s' opened\n", fn);
                bufsz = time_copy_bufsz(ibufsz, bcnt, maxlen);
                bc = times(&tm);
//              numrd = read(fd, buf, bufsz);
//              numrd = fread(buf, bufsz, 1, f);
                numrd = fread(buf, 1, bufsz, f);
                i++;
                if (numrd > 0)
                        bcnt = numrd;
                while ((numrd > 0) && (bufsz > 0)) {
                        bufsz = time_copy_bufsz(bufsz, bcnt, maxlen);
//                      numrd = read(fd, buf, bufsz);
//                      numrd = fread(buf, bufsz, 1, f);
                        numrd = fread(buf, 1, bufsz, f);
                        i++;
                        if (numrd >= 0)
//                              bcnt = bcnt + numrd;
                                bcnt += numrd;
                }
                ec = times(&tm);
//              close(fd);
                fclose(f);
                if (do_verbose)
                        printf("File '%s' closed\n", fn);
                if (numrd < 0) {
                        switch (errno) {
                        case EIO :
                                printf("IO Error at %zu B reading file '%s'\n", bcnt, fn);
                                break;
                        case EINVAL :
                                printf("Invalid Mode at %zu B reading file '%s'\n", bcnt, fn);
                                break;
                        default :
                                printf("Error '%d' at %zu B reading file '%s'\n", errno, bcnt, fn);
                        }
                        rv = 2;
                }
                if (bcnt > 0) {
                        if (bufsz == 0)
                                printf("maxed out on maxln\n");
                        if (do_simple)
                                print_cp_result_simple(fn, bcnt, bc, ec, ibufsz, do_verbose);
                        else
                                print_cp_result_long(fn, bcnt, bc, ec, ibufsz, do_verbose);
                }
                if (do_verbose)
                        printf("  numrd %d bcnt %d bufsz %d i %d\n", numrd, bcnt, bufsz, i);
        }
        return rv;
}       /* int time_copy(char *fn, char do_simple, int bufsz, off_t maxlen) */

int main(int argc, char *argv[])
{
        int i;
        char do_simple = 0, do_pbuf = 0, do_plen = 0, do_verbose = 0;
        char *arg;
        size_t tbufsz, bufsz = min((BUFSZ_DEF), (BUFSZ_MAX));
        off_t tmaxlen, maxlen = LEN_MAX;
        int numfl = 0;
        console_ansi_std();
//      openconsole(&dev_stdcon_r, &dev_stdcon_w);
        for (i = 1; i < argc; i++) {
                if (argv[i][0] == '-') {
                        arg = argv[i] + 1;
                        if (strcmp(arg, "b") == 0) {
                                i++;
                                if (i < argc) {
                                        tbufsz = atoi(argv[i]);
                                        if (tbufsz > 0)
                                                bufsz = min(max((BUFSZ_MIN), tbufsz), (BUFSZ_MAX));
                                        do_pbuf = 1;
                                }
                        } else if (strcmp(arg, "n") == 0) {
                                i++;
                                if (i < argc) {
                                        tmaxlen = atoi(argv[i]);
                                        if (tmaxlen > 0)
                                                maxlen = min(max((LEN_MIN), tmaxlen), (LEN_MAX));
                                        do_plen = 1;
                                }
                        } else if (strcmp(arg, "s") == 0)
                                do_simple = 1;
                        else if (strcmp(arg, "l") == 0)
                                do_simple = 0;
                        else if (strcmp(arg, "v") == 0)
                                do_verbose = 1;
                        else if (strcmp(arg, "q") == 0)
                                do_verbose = 0;
                }
        }
        if (do_pbuf || do_verbose)
                printf("Using bufsz %zu\n", bufsz);
        if (do_plen || do_verbose)
                printf("Using maxlen %zu\n", maxlen);
        for (i = 1; i < argc; i++) {
                if (argv[i][0] == '-') {
                        arg = argv[i] + 1;
                        if ((strcmp(arg, "b") == 0) || (strcmp(arg, "n") == 0))
                                i++;    /* Skip next arg */
                        else if (!((strcmp(arg, "s") == 0) || (strcmp(arg, "l") == 0) || (strcmp(arg, "v") == 0) || (strcmp(arg, "q") == 0))) {
                                time_copy(argv[i], do_simple, do_verbose, bufsz, maxlen);
                                numfl++;
                        }
                } else {
                        time_copy(argv[i], do_simple, do_verbose, bufsz, maxlen);
                        numfl++;
                }
        }
        if (numfl == 0)
                fprintf(stderr, "%s: Please specify a file\n", argv[0]);
        return 0;
}       /* int main(int argc, char *argv[]) */