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C++ cvtnum函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中cvtnum函数的典型用法代码示例。如果您正苦于以下问题：C++ cvtnum函数的具体用法？C++ cvtnum怎么用？C++ cvtnum使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了cvtnum函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: msync_f

int
msync_f(
	int		argc,
	char		**argv)
{
	off64_t		offset;
	ssize_t		length;
	void		*start;
	int		c, flags = 0;
	size_t		blocksize, sectsize;

	while ((c = getopt(argc, argv, "ais")) != EOF) {
		switch (c) {
		case 'a':
			flags |= MS_ASYNC;
			break;
		case 'i':
			flags |= MS_INVALIDATE;
			break;
		case 's':
			flags |= MS_SYNC;
			break;
		default:
			return command_usage(&msync_cmd);
		}
	}

	if (optind == argc) {
		offset = mapping->offset;
		length = mapping->length;
	} else if (optind == argc - 2) {
		init_cvtnum(&blocksize, &sectsize);
		offset = cvtnum(blocksize, sectsize, argv[optind]);
		if (offset < 0) {
			printf(_("non-numeric offset argument -- %s\n"),
				argv[optind]);
			return 0;
		}
		optind++;
		length = cvtnum(blocksize, sectsize, argv[optind]);
		if (length < 0) {
			printf(_("non-numeric length argument -- %s\n"),
				argv[optind]);
			return 0;
		}
	} else {
		return command_usage(&msync_cmd);
	}

	start = check_mapping_range(mapping, offset, length, 1);
	if (!start)
		return 0;

	if (msync(start, length, flags) < 0)
		perror("msync");

	return 0;
}
开发者ID:tytso，项目名称:xfsprogs，代码行数:58，代码来源:mmap.c


示例2: discard_f

static int discard_f(int argc, char **argv)
{
    struct timeval t1, t2;
    int Cflag = 0, qflag = 0;
    int c, ret;
    int64_t offset;
    int count;

    while ((c = getopt(argc, argv, "Cq")) != EOF) {
        switch (c) {
        case 'C':
            Cflag = 1;
            break;
        case 'q':
            qflag = 1;
            break;
        default:
            return command_usage(&discard_cmd);
        }
    }

    if (optind != argc - 2) {
        return command_usage(&discard_cmd);
    }

    offset = cvtnum(argv[optind]);
    if (offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }

    optind++;
    count = cvtnum(argv[optind]);
    if (count < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }

    gettimeofday(&t1, NULL);
    ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS,
                       count >> BDRV_SECTOR_BITS);
    gettimeofday(&t2, NULL);

    if (ret < 0) {
        printf("discard failed: %s\n", strerror(-ret));
        goto out;
    }

    /* Finally, report back -- -C gives a parsable format */
    if (!qflag) {
        t2 = tsub(t2, t1);
        print_report("discard", &t2, offset, count, count, 1, Cflag);
    }

out:
    return 0;
}
开发者ID:AjayMashi，项目名称:x-tier，代码行数:57，代码来源:qemu-io.c


示例3: alloc_f

static int alloc_f(int argc, char **argv)
{
    int64_t offset, sector_num;
    int nb_sectors, remaining;
    char s1[64];
    int num, sum_alloc;
    int ret;

    offset = cvtnum(argv[1]);
    if (offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               offset);
        return 0;
    }

    if (argc == 3) {
        nb_sectors = cvtnum(argv[2]);
    } else {
        nb_sectors = 1;
    }

    remaining = nb_sectors;
    sum_alloc = 0;
    sector_num = offset >> 9;
    while (remaining) {
        ret = bdrv_is_allocated(bs, sector_num, remaining, &num);
        if (ret < 0) {
            printf("is_allocated failed: %s\n", strerror(-ret));
            return 0;
        }
        sector_num += num;
        remaining -= num;
        if (ret) {
            sum_alloc += num;
        }
        if (num == 0) {
            nb_sectors -= remaining;
            remaining = 0;
        }
    }

    cvtstr(offset, s1, sizeof(s1));

    if (nb_sectors == 1)
        printf("sector allocated at offset %s\n", s1);
    else
        printf("%d/%d sectors allocated at offset %s\n",
               sum_alloc, nb_sectors, s1);
    return 0;
}
开发者ID:mithleshvrts，项目名称:qemu-kvm-rhel6，代码行数:50，代码来源:qemu-io.c


示例4: aio_write_f

static int aio_write_f(int argc, char **argv)
{
    int nr_iov, c;
    int pattern = 0xcd;
    struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);

    while ((c = getopt(argc, argv, "CqP:")) != EOF) {
        switch (c) {
        case 'C':
            ctx->Cflag = 1;
            break;
        case 'q':
            ctx->qflag = 1;
            break;
        case 'P':
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
                g_free(ctx);
                return 0;
            }
            break;
        default:
            g_free(ctx);
            return command_usage(&aio_write_cmd);
        }
    }

    if (optind > argc - 2) {
        g_free(ctx);
        return command_usage(&aio_write_cmd);
    }

    ctx->offset = cvtnum(argv[optind]);
    if (ctx->offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        g_free(ctx);
        return 0;
    }
    optind++;

    if (ctx->offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               ctx->offset);
        g_free(ctx);
        return 0;
    }

    nr_iov = argc - optind;
    ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
    if (ctx->buf == NULL) {
        g_free(ctx);
        return 0;
    }

    gettimeofday(&ctx->t1, NULL);
    bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
                    ctx->qiov.size >> 9, aio_write_done, ctx);
    return 0;
}
开发者ID:AjayMashi，项目名称:x-tier，代码行数:59，代码来源:qemu-io.c


示例5: alloc_f

static int
alloc_f(int argc, char **argv)
{
	int64_t offset;
	int nb_sectors, remaining;
	char s1[64];
	int num, sum_alloc;
	int ret;

	offset = cvtnum(argv[1]);
	if (offset & 0x1ff) {
		printf("offset %lld is not sector aligned\n",
			(long long)offset);
		return 0;
	}

	if (argc == 3)
		nb_sectors = cvtnum(argv[2]);
	else
		nb_sectors = 1;

	remaining = nb_sectors;
	sum_alloc = 0;
	while (remaining) {
		ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
		remaining -= num;
		if (ret) {
			sum_alloc += num;
		}
	}

	cvtstr(offset, s1, sizeof(s1));

	if (nb_sectors == 1)
		printf("sector allocated at offset %s\n", s1);
	else
		printf("%d/%d sectors allocated at offset %s\n",
			sum_alloc, nb_sectors, s1);
	return 0;
}
开发者ID:bulotus，项目名称:bulotus-qemu-at91sam9263ek，代码行数:40，代码来源:qemu-io.c


示例6: create_iovec

/*
 * Parse multiple length statements for vectored I/O, and construct an I/O
 * vector matching it.
 */
static void *
create_iovec(QEMUIOVector *qiov, char **argv, int nr_iov, int pattern)
{
    size_t *sizes = g_new0(size_t, nr_iov);
    size_t count = 0;
    void *buf = NULL;
    void *p;
    int i;

    for (i = 0; i < nr_iov; i++) {
        char *arg = argv[i];
        int64_t len;

        len = cvtnum(arg);
        if (len < 0) {
            printf("non-numeric length argument -- %s\n", arg);
            goto fail;
        }

        /* should be SIZE_T_MAX, but that doesn't exist */
        if (len > INT_MAX) {
            printf("too large length argument -- %s\n", arg);
            goto fail;
        }

        if (len & 0x1ff) {
            printf("length argument %" PRId64
                   " is not sector aligned\n", len);
            goto fail;
        }

        sizes[i] = len;
        count += len;
    }

    qemu_iovec_init(qiov, nr_iov);

    buf = p = qemu_io_alloc(count, pattern);

    for (i = 0; i < nr_iov; i++) {
        qemu_iovec_add(qiov, p, sizes[i]);
        p += sizes[i];
    }

fail:
    g_free(sizes);
    return buf;
}
开发者ID:AjayMashi，项目名称:x-tier，代码行数:52，代码来源:qemu-io.c


示例7: extsize_f

static int
extsize_f(
	int		argc,
	char		**argv)
{
	size_t			blocksize, sectsize;
	int			c;

	recurse_all = recurse_dir = 0;
	init_cvtnum(&blocksize, &sectsize);
	while ((c = getopt(argc, argv, "DR")) != EOF) {
		switch (c) {
		case 'D':
			recurse_all = 0;
			recurse_dir = 1;
			break;
		case 'R':
			recurse_all = 1;
			recurse_dir = 0;
			break;
		default:
			return command_usage(&extsize_cmd);
		}
	}

	if (optind < argc) {
		extsize = (long)cvtnum(blocksize, sectsize, argv[optind]);
		if (extsize < 0) {
			printf(_("non-numeric extsize argument -- %s\n"),
				argv[optind]);
			return 0;
		}
	} else {
		extsize = -1;
	}

	if (recurse_all || recurse_dir)
		nftw(file->name, (extsize >= 0) ?
			set_extsize_callback : get_extsize_callback,
			100, FTW_PHYS | FTW_MOUNT | FTW_DEPTH);
	else if (extsize >= 0)
		set_extsize(file->name, file->fd, extsize);
	else
		get_extsize(file->name, file->fd);
	return 0;
}
开发者ID:chandanr，项目名称:xfsprogs-dev，代码行数:46，代码来源:open.c


示例8: truncate_f

static int truncate_f(int argc, char **argv)
{
    int64_t offset;
    int ret;

    offset = cvtnum(argv[1]);
    if (offset < 0) {
        printf("non-numeric truncate argument -- %s\n", argv[1]);
        return 0;
    }

    ret = bdrv_truncate(bs, offset);
    if (ret < 0) {
        printf("truncate: %s\n", strerror(-ret));
        return 0;
    }

    return 0;
}
开发者ID:AjayMashi，项目名称:x-tier，代码行数:19，代码来源:qemu-io.c


示例9: mremap_f

int
mremap_f(
	int		argc,
	char		**argv)
{
	ssize_t		new_length;
	void		*new_addr;
	int		flags = 0;
	int		c;
	size_t		blocksize, sectsize;

	while ((c = getopt(argc, argv, "fm")) != EOF) {
		switch (c) {
		case 'f':
			flags = MREMAP_FIXED|MREMAP_MAYMOVE;
			break;
		case 'm':
			flags = MREMAP_MAYMOVE;
			break;
		default:
			return command_usage(&mremap_cmd);
		}
	}

	init_cvtnum(&blocksize, &sectsize);
	new_length = cvtnum(blocksize, sectsize, argv[optind]);
	if (new_length < 0) {
		printf(_("non-numeric offset argument -- %s\n"),
			argv[optind]);
		return 0;
	}

	new_addr = mremap(mapping->addr, mapping->length, new_length, flags);
	if (new_addr == MAP_FAILED)
		perror("mremap");
	else {
		mapping->addr = new_addr;
		mapping->length = new_length;
	}

	return 0;
}
开发者ID:tytso，项目名称:xfsprogs，代码行数:42，代码来源:mmap.c


示例10: truncate_f

static int
truncate_f(
	int		argc,
	char		**argv)
{
	off64_t		offset;
	size_t		blocksize, sectsize;

	init_cvtnum(&blocksize, &sectsize);
	offset = cvtnum(blocksize, sectsize, argv[1]);
	if (offset < 0) {
		printf(_("non-numeric truncate argument -- %s\n"), argv[1]);
		return 0;
	}

	if (ftruncate64(file->fd, offset) < 0) {
		perror("ftruncate");
		return 0;
	}
	return 0;
}
开发者ID:Claruarius，项目名称:stblinux-2.6.37，代码行数:21，代码来源:truncate.c


示例11: pread_f

static int
pread_f(
	int		argc,
	char		**argv)
{
	size_t		bsize;
	off64_t		offset;
	unsigned int	zeed = 0;
	long long	count, total, tmp;
	size_t		fsblocksize, fssectsize;
	struct timeval	t1, t2;
	char		s1[64], s2[64], ts[64];
	char		*sp;
	int		Cflag, qflag, uflag, vflag;
	int		eof = 0, direction = IO_FORWARD;
	int		c;

	Cflag = qflag = uflag = vflag = 0;
	init_cvtnum(&fsblocksize, &fssectsize);
	bsize = fsblocksize;

	while ((c = getopt(argc, argv, "b:BCFRquvV:Z:")) != EOF) {
		switch (c) {
		case 'b':
			tmp = cvtnum(fsblocksize, fssectsize, optarg);
			if (tmp < 0) {
				printf(_("non-numeric bsize -- %s\n"), optarg);
				return 0;
			}
			bsize = tmp;
			break;
		case 'C':
			Cflag = 1;
			break;
		case 'F':
			direction = IO_FORWARD;
			break;
		case 'B':
			direction = IO_BACKWARD;
			break;
		case 'R':
			direction = IO_RANDOM;
			break;
		case 'q':
			qflag = 1;
			break;
		case 'u':
			uflag = 1;
			break;
		case 'v':
			vflag = 1;
			break;
#ifdef HAVE_PREADV
		case 'V':
			vectors = strtoul(optarg, &sp, 0);
			if (!sp || sp == optarg) {
				printf(_("non-numeric vector count == %s\n"),
					optarg);
				return 0;
			}
			break;
#endif
		case 'Z':
			zeed = strtoul(optarg, &sp, 0);
			if (!sp || sp == optarg) {
				printf(_("non-numeric seed -- %s\n"), optarg);
				return 0;
			}
			break;
		default:
			return command_usage(&pread_cmd);
		}
	}
	if (optind != argc - 2)
		return command_usage(&pread_cmd);

	offset = cvtnum(fsblocksize, fssectsize, argv[optind]);
	if (offset < 0 && (direction & (IO_RANDOM|IO_BACKWARD))) {
		eof = -1;	/* read from EOF */
	} else if (offset < 0) {
		printf(_("non-numeric length argument -- %s\n"), argv[optind]);
		return 0;
	}
	optind++;
	count = cvtnum(fsblocksize, fssectsize, argv[optind]);
	if (count < 0 && (direction & (IO_RANDOM|IO_FORWARD))) {
		eof = -1;	/* read to EOF */
	} else if (count < 0) {
		printf(_("non-numeric length argument -- %s\n"), argv[optind]);
		return 0;
	}

	if (alloc_buffer(bsize, uflag, 0xabababab) < 0)
		return 0;

	gettimeofday(&t1, NULL);
	switch (direction) {
	case IO_RANDOM:
		if (!zeed)	/* srandom seed */
			zeed = time(NULL);
//.........这里部分代码省略.........
开发者ID:chandanr，项目名称:xfsprogs-dev，代码行数:101，代码来源:pread.c


示例12: evalvar

static char *
evalvar(char *p, int flag)
{
	int subtype;
	int varflags;
	char *var;
	const char *val;
	int patloc;
	int c;
	int set;
	int special;
	int startloc;
	int varlen;
	int varlenb;
	int easy;
	int quotes = flag & (EXP_FULL | EXP_CASE);
	int record = 0;

	varflags = (unsigned char)*p++;
	subtype = varflags & VSTYPE;
	var = p;
	special = 0;
	if (! is_name(*p))
		special = 1;
	p = strchr(p, '=') + 1;
again: /* jump here after setting a variable with ${var=text} */
	if (varflags & VSLINENO) {
		set = 1;
		special = 1;
		val = NULL;
	} else if (special) {
		set = varisset(var, varflags & VSNUL);
		val = NULL;
	} else {
		val = bltinlookup(var, 1);
		if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
			val = NULL;
			set = 0;
		} else
			set = 1;
	}
	varlen = 0;
	startloc = expdest - stackblock();
	if (!set && uflag && *var != '@' && *var != '*') {
		switch (subtype) {
		case VSNORMAL:
		case VSTRIMLEFT:
		case VSTRIMLEFTMAX:
		case VSTRIMRIGHT:
		case VSTRIMRIGHTMAX:
		case VSLENGTH:
			error("%.*s: parameter not set", (int)(p - var - 1),
			    var);
		}
	}
	if (set && subtype != VSPLUS) {
		/* insert the value of the variable */
		if (special) {
			if (varflags & VSLINENO)
				STPUTBIN(var, p - var - 1, expdest);
			else
			varvalue(var, varflags & VSQUOTE, subtype, flag);
			if (subtype == VSLENGTH) {
				varlenb = expdest - stackblock() - startloc;
				varlen = varlenb;
				if (localeisutf8) {
					val = stackblock() + startloc;
					for (;val != expdest; val++)
						if ((*val & 0xC0) == 0x80)
							varlen--;
				}
				STADJUST(-varlenb, expdest);
			}
		} else {
			if (subtype == VSLENGTH) {
				for (;*val; val++)
					if (!localeisutf8 ||
					    (*val & 0xC0) != 0x80)
						varlen++;
			}
				else
				strtodest(val, flag, subtype,
				    varflags & VSQUOTE);
		}
	}

	if (subtype == VSPLUS)
		set = ! set;

	easy = ((varflags & VSQUOTE) == 0 ||
		(*var == '@' && shellparam.nparam != 1));


	switch (subtype) {
	case VSLENGTH:
		expdest = cvtnum(varlen, expdest);
		record = 1;
		break;

	case VSNORMAL:
//.........这里部分代码省略.........
开发者ID:DragonFlyBSD，项目名称:DragonFlyBSD，代码行数:101，代码来源:expand.c


示例13: varvalue

static void
varvalue(const char *name, int quoted, int subtype, int flag)
{
	int num;
	char *p;
	int i;
	char sep[2];
	char **ap;

	switch (*name) {
	case '$':
		num = rootpid;
		break;
	case '?':
		num = oexitstatus;
		break;
	case '#':
		num = shellparam.nparam;
		break;
	case '!':
		num = backgndpidval();
		break;
	case '-':
		for (i = 0 ; i < NOPTS ; i++) {
			if (optlist[i].val)
				STPUTC(optlist[i].letter, expdest);
		}
		return;
	case '@':
		if (flag & EXP_FULL && quoted) {
			for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
				strtodest(p, flag, subtype, quoted);
				if (*ap)
					STPUTC('\0', expdest);
			}
			return;
		}
		/* FALLTHROUGH */
	case '*':
		if (ifsset())
			sep[0] = ifsval()[0];
		else
			sep[0] = ' ';
		sep[1] = '\0';
		for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
			strtodest(p, flag, subtype, quoted);
			if (!*ap)
				break;
			if (sep[0])
				strtodest(sep, flag, subtype, quoted);
			else if (flag & EXP_FULL && !quoted && **ap != '\0')
				STPUTC('\0', expdest);
		}
		return;
	default:
		if (is_digit(*name)) {
			num = atoi(name);
			if (num == 0)
				p = arg0;
			else if (num > 0 && num <= shellparam.nparam)
				p = shellparam.p[num - 1];
			else
				return;
			strtodest(p, flag, subtype, quoted);
			}
		return;
		}
	expdest = cvtnum(num, expdest);
}
开发者ID:DragonFlyBSD，项目名称:DragonFlyBSD，代码行数:69，代码来源:expand.c


示例14: main

int main(int argc, char **argv)
{
	int	fd;
	char	*fname;
	int	opt;
	loff_t	length = -2LL;
	loff_t	offset = 0;
	int	falloc_mode = 0;
	int	error;
	int	tflag = 0;

	while ((opt = getopt(argc, argv, "nl:ot")) != -1) {
		switch(opt) {
		case 'n':
			/* do not change filesize */
			falloc_mode = FALLOC_FL_KEEP_SIZE;
			break;
		case 'l':
			length = cvtnum(optarg);
			break;
		case 'o':
			offset = cvtnum(optarg);
			break;
		case 't':
			tflag++;
			break;
		default:
			usage();
		}
	}

	if (length == -2LL) {
		printf("Error: no length argument specified\n");
		usage();
	}

	if (length <= 0) {
		printf("Error: invalid length value specified\n");
		usage();
	}

	if (offset < 0) {
		printf("Error: invalid offset value specified\n");
		usage();
	}

	if (tflag && (falloc_mode & FALLOC_FL_KEEP_SIZE)) {
		printf("-n and -t options incompatible\n");
		usage();
	}

	if (tflag && offset) {
		printf("-n and -o options incompatible\n");
		usage();
	}

	if (optind == argc) {
		printf("Error: no filename specified\n");
		usage();
	}

	fname = argv[optind++];

	/* Should we create the file if it doesn't already exist? */
	fd = open(fname, O_WRONLY|O_LARGEFILE);
	if (fd < 0) {
		perror("Error opening file");
		exit(EXIT_FAILURE);
	}

	if (tflag)
		error = ftruncate(fd, length);
	else
		error = syscall(SYS_fallocate, fd, falloc_mode, offset, length);

	if (error < 0) {
		perror("fallocate failed");
		exit(EXIT_FAILURE);
	}

	close(fd);
	return 0;
}
开发者ID:ESOS-Lab，项目名称:MOST，代码行数:83，代码来源:fallocate.c


示例15: main

int main(int argc, char **argv)
{
	int	c;
	int	fd;
	int	mode = 0;
	int	dig = 0;
	loff_t	length = -2LL;
	loff_t	offset = 0;

	static const struct option longopts[] = {
	    { "help",           0, 0, 'h' },
	    { "version",        0, 0, 'V' },
	    { "keep-size",      0, 0, 'n' },
	    { "punch-hole",     0, 0, 'p' },
	    { "collapse-range", 0, 0, 'c' },
	    { "dig-holes",      0, 0, 'd' },
	    { "insert-range",   0, 0, 'i' },
	    { "zero-range",     0, 0, 'z' },
	    { "offset",         1, 0, 'o' },
	    { "length",         1, 0, 'l' },
	    { "verbose",        0, 0, 'v' },
	    { NULL,             0, 0, 0 }
	};

	static const ul_excl_t excl[] = {	/* rows and cols in in ASCII order */
		{ 'c', 'd', 'p', 'z' },
		{ 'c', 'n' },
		{ 0 }
	};
	int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;

	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);
	atexit(close_stdout);

	while ((c = getopt_long(argc, argv, "hvVncpdizl:o:", longopts, NULL))
			!= -1) {

		err_exclusive_options(c, longopts, excl, excl_st);

		switch(c) {
		case 'h':
			usage(stdout);
			break;
		case 'c':
			mode |= FALLOC_FL_COLLAPSE_RANGE;
			break;
		case 'd':
			dig = 1;
			break;
		case 'i':
			mode |= FALLOC_FL_INSERT_RANGE;
			break;
		case 'l':
			length = cvtnum(optarg);
			break;
		case 'n':
			mode |= FALLOC_FL_KEEP_SIZE;
			break;
		case 'o':
			offset = cvtnum(optarg);
			break;
		case 'p':
			mode |= FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
			break;
		case 'z':
			mode |= FALLOC_FL_ZERO_RANGE;
			break;
		case 'v':
			verbose++;
			break;
		case 'V':
			printf(UTIL_LINUX_VERSION);
			return EXIT_SUCCESS;
		default:
			usage(stderr);
			break;
		}
	}

	if (optind == argc)
		errx(EXIT_FAILURE, _("no filename specified"));

	filename = argv[optind++];

	if (optind != argc)
		errx(EXIT_FAILURE, _("unexpected number of arguments"));

	if (dig) {
		/* for --dig-holes the default is analyze all file */
		if (length == -2LL)
			length = 0;
		if (length < 0)
			errx(EXIT_FAILURE, _("invalid length value specified"));
	} else {
		/* it's safer to require the range specification (--length --offset) */
		if (length == -2LL)
			errx(EXIT_FAILURE, _("no length argument specified"));
		if (length <= 0)
//.........这里部分代码省略.........
开发者ID:kerolasa，项目名称:lelux-utiliteetit，代码行数:101，代码来源:fallocate.c


示例16: multiwrite_f

static int
multiwrite_f(int argc, char **argv)
{
	struct timeval t1, t2;
	int Cflag = 0, qflag = 0;
	int c, cnt;
	char **buf;
	int64_t offset, first_offset = 0;
	
	int total = 0;
	int nr_iov;
	int nr_reqs;
	int pattern = 0xcd;
	QEMUIOVector *qiovs;
	int i;
	BlockRequest *reqs;

	while ((c = getopt(argc, argv, "CqP:")) != EOF) {
		switch (c) {
		case 'C':
			Cflag = 1;
			break;
		case 'q':
			qflag = 1;
			break;
		case 'P':
			pattern = parse_pattern(optarg);
			if (pattern < 0)
				return 0;
			break;
		default:
			return command_usage(&writev_cmd);
		}
	}

	if (optind > argc - 2)
		return command_usage(&writev_cmd);

	nr_reqs = 1;
	for (i = optind; i < argc; i++) {
		if (!strcmp(argv[i], ";")) {
			nr_reqs++;
		}
	}

	reqs = qemu_malloc(nr_reqs * sizeof(*reqs));
	buf = qemu_malloc(nr_reqs * sizeof(*buf));
	qiovs = qemu_malloc(nr_reqs * sizeof(*qiovs));

	for (i = 0; i < nr_reqs; i++) {
		int j;

		
		offset = cvtnum(argv[optind]);
		if (offset < 0) {
			printf("non-numeric offset argument -- %s\n", argv[optind]);
			return 0;
		}
		optind++;

		if (offset & 0x1ff) {
			printf("offset %lld is not sector aligned\n",
				(long long)offset);
			return 0;
		}

        if (i == 0) {
            first_offset = offset;
        }

		
		for (j = optind; j < argc; j++) {
			if (!strcmp(argv[j], ";")) {
				break;
			}
		}

		nr_iov = j - optind;

		
		reqs[i].qiov = &qiovs[i];
		buf[i] = create_iovec(reqs[i].qiov, &argv[optind], nr_iov, pattern);
		reqs[i].sector = offset >> 9;
		reqs[i].nb_sectors = reqs[i].qiov->size >> 9;

		optind = j + 1;

		offset += reqs[i].qiov->size;
		pattern++;
	}

	gettimeofday(&t1, NULL);
	cnt = do_aio_multiwrite(reqs, nr_reqs, &total);
	gettimeofday(&t2, NULL);

	if (cnt < 0) {
		printf("aio_multiwrite failed: %s\n", strerror(-cnt));
		goto out;
	}

//.........这里部分代码省略.........
开发者ID:qtekfun，项目名称:htcDesire820Kernel，代码行数:101，代码来源:qemu-io.c


示例17: aio_read_f

static int
aio_read_f(int argc, char **argv)
{
    int nr_iov, c;
    struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
    BlockDriverAIOCB *acb;

    while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
        switch (c) {
        case 'C':
            ctx->Cflag = 1;
            break;
        case 'P':
            ctx->Pflag = 1;
            ctx->pattern = parse_pattern(optarg);
            if (ctx->pattern < 0)
                return 0;
            break;
        case 'q':
            ctx->qflag = 1;
            break;
        case 'v':
            ctx->vflag = 1;
            break;
        default:
            free(ctx);
            return command_usage(&aio_read_cmd);
        }
    }

    if (optind > argc - 2) {
        free(ctx);
        return command_usage(&aio_read_cmd);
    }

    ctx->offset = cvtnum(argv[optind]);
    if (ctx->offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        free(ctx);
        return 0;
    }
    optind++;

    if (ctx->offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               ctx->offset);
        free(ctx);
        return 0;
    }

    nr_iov = argc - optind;
    ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);

    gettimeofday(&ctx->t1, NULL);
    acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
                         ctx->qiov.size >> 9, aio_read_done, ctx);
    if (!acb) {
        free(ctx->buf);
        free(ctx);
        return -EIO;
    }

    return 0;
}
开发者ID:ChengyuSong，项目名称:ATrace，代码行数:64，代码来源:qemu-io.c


示例18: readv_f

static int readv_f(int argc, char **argv)
{
    struct timeval t1, t2;
    int Cflag = 0, qflag = 0, vflag = 0;
    int c, cnt;
    char *buf;
    int64_t offset;
    /* Some compilers get confused and warn if this is not initialized.  */
    int total = 0;
    int nr_iov;
    QEMUIOVector qiov;
    int pattern = 0;
    int Pflag = 0;

    while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
        switch (c) {
        case 'C':
            Cflag = 1;
            break;
        case 'P':
            Pflag = 1;
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
                return 0;
            }
            break;
        case 'q':
            qflag = 1;
            break;
        case 'v':
            vflag = 1;
            break;
        default:
            return command_usage(&readv_cmd);
        }
    }

    if (optind > argc - 2) {
        return command_usage(&readv_cmd);
    }


    offset = cvtnum(argv[optind]);
    if (offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }
    optind++;

    if (offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               offset);
        return 0;
    }

    nr_iov = argc - optind;
    buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
    if (buf == NULL) {
        return 0;
    }

    gettimeofday(&t1, NULL);
    cnt = do_aio_readv(&qiov, offset, &total);
    gettimeofday(&t2, NULL);

    if (cnt < 0) {
        printf("readv failed: %s\n", strerror(-cnt));
        goto out;
    }

    if (Pflag) {
        void *cmp_buf = g_malloc(qiov.size);
        memset(cmp_buf, pattern, qiov.size);
        if (memcmp(buf, cmp_buf, qiov.size)) {
            printf("Pattern verification failed at offset %"
                   PRId64 ", %zd bytes\n", offset, qiov.size);
        }
        g_free(cmp_buf);
    }

    if (qflag) {
        goto out;
    }

    if (vflag) {
        dump_buffer(buf, offset, qiov.size);
    }

    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, t1);
    print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);

out:
    qemu_iovec_destroy(&qiov);
    qemu_io_free(buf);
    return 0;
}
开发者ID:AjayMashi，项目名称:x-tier，代码行数:97，代码来源:qemu-io.c


示例19: writev_f

static int writev_f(int argc, char **argv)
{
    struct timeval t1, t2;
    int Cflag = 0, qflag = 0;
    int c, cnt;
    char *buf;
    int64_t offset;
    /* Some compilers get confused and warn if this is not initialized.  */
    int total = 0;
    int nr_iov;
    int pattern = 0xcd;
    QEMUIOVector qiov;

    while ((c = getopt(argc, argv, "CqP:")) != EOF) {
        switch (c) {
        case 'C':
            Cflag = 1;
            break;
        case 'q':
            qflag = 1;
            break;
        case 'P':
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
                return 0;
            }
            break;
        default:
            return command_usage(&writev_cmd);
        }
    }

    if (optind > argc - 2) {
        return command_usage(&writev_cmd);
    }

    offset = cvtnum(argv[optind]);
    if (offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }
    optind++;

    if (offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               offset);
        return 0;
    }

    nr_iov = argc - optind;
    buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
    if (buf == NULL) {
        return 0;
    }

    gettimeofday(&t1, NULL);
    cnt = do_aio_writev(&qiov, offset, &total);
    gettimeofday(&t2, NULL);

    if (cnt < 0) {
        printf("writev failed: %s\n", strerror(-cnt));
        goto out;
    }

    if (qflag) {
        goto out;
    }

    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, t1);
    print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
out:
    qemu_iovec_destroy(&qiov);
    qemu_io_free(buf);
    return 0;
}
开发者ID:AjayMashi，项目名称:x-tier，代码行数:76，代码来源:qemu-io.c


示例20: evalvar

STATIC char *
evalvar(shinstance *psh, char *p, int flag)
{
	int subtype;
	int varflags;
	char *var;
	char *val;
	int patloc;
	int c;
	int set;
	int special;
	int startloc;
	int varlen;
	int apply_ifs;
	int quotes = flag & (EXP_FULL | EXP_CASE);

	varflags = (unsigned char)*p++;
	subtype = varflags & VSTYPE;
	var = p;
	special = !is_name(*p);
	p = strchr(p, '=') + 1;

again: /* jump here after setting a variable with ${var=text} */
	if (special) {
		set = varisset(psh, var, varflags & VSNUL);
		val = NULL;
	} else {
		val = lookupvar(psh, var);
		if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
			val = NULL;
			set = 0;
		} else
			set = 1;
	}

	varlen = 0;
	startloc = (int)(psh->expdest - stackblock(psh));

	if (!set && uflag(psh)) {
		switch (subtype) {
		case VSNORMAL:
		case VSTRIMLEFT:
		case VSTRIMLEFTMAX:
		case VSTRIMRIGHT:
		case VSTRIMRIGHTMAX:
		case VSLENGTH:
			error(psh, "%.*s: parameter not set", p - var - 1, var);
			/* NOTREACHED */
		}
	}

	if (set && subtype != VSPLUS) {
		/* insert the value of the variable */
		if (special) {
			varvalue(psh, var, varflags & VSQUOTE, subtype, flag);
			if (subtype == VSLENGTH) {
				varlen = (int)(psh->expdest - stackblock(psh) - startloc);
				STADJUST(psh, -varlen, psh->expdest);
			}
		} else {
			char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX
								  : BASESYNTAX;

			if (subtype == VSLENGTH) {
				for (;*val; val++)
					varlen++;
			} else {
				while (*val) {
					if (quotes && syntax[(int)*val] == CCTL)
						STPUTC(psh, CTLESC, psh->expdest);
					STPUTC(psh, *val++, psh->expdest);
				}

			}
		}
	}


	apply_ifs = ((varflags & VSQUOTE) == 0 ||
		(*var == '@' && psh->shellparam.nparam != 1));

	switch (subtype) {
	case VSLENGTH:
		psh->expdest = cvtnum(psh, varlen, psh->expdest);
		break;

	case VSNORMAL:
		break;

	case VSPLUS:
		set = !set;
		/* FALLTHROUGH */
	case VSMINUS:
		if (!set) {
		        argstr(psh, p, flag | (apply_ifs ? EXP_IFS_SPLIT : 0));
			/*
			 * ${x-a b c} doesn't get split, but removing the
			 * 'apply_ifs = 0' apparantly breaks ${1+"[email protected]"}..
			 * ${x-'a b' c} should generate 2 args.
			 */
//.........这里部分代码省略.........
开发者ID:egraba，项目名称:kbuild_openbsd，代码行数:101，代码来源:expand.c



注：本文中的cvtnum函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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