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btrfs-progs: Introduce get_unit_mode_from_arg for common use

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We are using separate code for parsing unit mode in current code,
better to use common function.

This patch introduces a common function to specify units as arguments
and a common help message, to make every tool in btrfs having same unit
argument.

The benefits are:
1: Unify current tool's arguments for unit
2: Make tools in future easy to implement such argument
3: Changes (enhancement) in common function have effect on all
   relative tools

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Zhao Lei 2015-08-31 19:03:41 +08:00 committed by David Sterba
parent f7ad593ca0
commit 656731013a
2 changed files with 126 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

102
utils.c
View File

@ -2950,3 +2950,105 @@ int arg_copy_path(char *dest, const char *src, int destlen)
return 0;
}
unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode)
{
unsigned int unit_mode = UNITS_DEFAULT;
int arg_i;
int arg_end;
for (arg_i = 0; arg_i < *argc; arg_i++) {
if (!strcmp(argv[arg_i], "--raw")) {
unit_mode = UNITS_RAW;
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "--human-readable")) {
unit_mode = UNITS_HUMAN_BINARY;
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "--iec")) {
units_set_mode(&unit_mode, UNITS_BINARY);
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "--si")) {
units_set_mode(&unit_mode, UNITS_DECIMAL);
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "--kbytes")) {
units_set_base(&unit_mode, UNITS_KBYTES);
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "--mbytes")) {
units_set_base(&unit_mode, UNITS_MBYTES);
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "--gbytes")) {
units_set_base(&unit_mode, UNITS_GBYTES);
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "--tbytes")) {
units_set_base(&unit_mode, UNITS_TBYTES);
argv[arg_i] = NULL;
continue;
}
if (!df_mode)
continue;
if (!strcmp(argv[arg_i], "-b")) {
unit_mode = UNITS_RAW;
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "-h")) {
unit_mode = UNITS_HUMAN_BINARY;
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "-H")) {
unit_mode = UNITS_HUMAN_DECIMAL;
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "-k")) {
units_set_base(&unit_mode, UNITS_KBYTES);
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "-m")) {
units_set_base(&unit_mode, UNITS_MBYTES);
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "-g")) {
units_set_base(&unit_mode, UNITS_GBYTES);
argv[arg_i] = NULL;
continue;
}
if (!strcmp(argv[arg_i], "-t")) {
units_set_base(&unit_mode, UNITS_TBYTES);
argv[arg_i] = NULL;
continue;
}
}
for (arg_i = 0, arg_end = 0; arg_i < *argc; arg_i++) {
if (!argv[arg_i])
continue;
argv[arg_end] = argv[arg_i];
arg_end++;
}
*argc = arg_end;
return unit_mode;
}

24
utils.h
View File

@ -245,4 +245,28 @@ int btrfs_check_nodesize(u32 nodesize, u32 sectorsize);
const char *get_argv0_buf(void);
#define HELPINFO_OUTPUT_UNIT \
"--raw raw numbers in bytes", \
"--human-readable human friendly numbers, base 1024 (default)", \
"--iec use 1024 as a base (KiB, MiB, GiB, TiB)", \
"--si use 1000 as a base (kB, MB, GB, TB)", \
"--kbytes show sizes in KiB, or kB with --si", \
"--mbytes show sizes in MiB, or MB with --si", \
"--gbytes show sizes in GiB, or GB with --si", \
"--tbytes show sizes in TiB, or TB with --si"
#define HELPINFO_OUTPUT_UNIT_DF \
"-b|--raw raw numbers in bytes", \
"-h|--human-readable", \
" human friendly numbers, base 1024 (default)", \
"-H human friendly numbers, base 1000", \
"--iec use 1024 as a base (KiB, MiB, GiB, TiB)", \
"--si use 1000 as a base (kB, MB, GB, TB)", \
"-k|--kbytes show sizes in KiB, or kB with --si", \
"-m|--mbytes show sizes in MiB, or MB with --si", \
"-g|--gbytes show sizes in GiB, or GB with --si", \
"-t|--tbytes show sizes in TiB, or TB with --si"
unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
#endif