ls: handle all sort options through option_mask32
function old new delta packed_usage 31007 31024 +17 my_stat 318 324 +6 sort_and_display_files 419 420 +1 print_name 216 217 +1 sortcmp 228 216 -12 opt_flags 96 64 -32 ls_main 732 685 -47 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/3 up/down: 25/-91) Total: -66 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
7a18b9502a
commit
11540a8da4
113
coreutils/ls.c
113
coreutils/ls.c
@ -137,7 +137,7 @@
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//usage: "\n --full-time List full date and time"
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//usage: ))
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//usage: IF_FEATURE_HUMAN_READABLE(
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//usage: "\n -h List sizes in human readable format (1K 243M 2G)"
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//usage: "\n -h Human readable sizes (1K 243M 2G)"
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//usage: )
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//usage: IF_FEATURE_LS_SORTFILES(
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//usage: IF_LONG_OPTS(
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@ -158,7 +158,7 @@
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//usage: "\n -Z List security context and permission"
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//usage: )
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//usage: IF_FEATURE_LS_WIDTH(
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//usage: "\n -w N Assume the terminal is N columns wide"
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//usage: "\n -w N Format N columns wide"
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//usage: )
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//usage: IF_FEATURE_LS_COLOR(
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//usage: "\n --color[={always,never,auto}] Control coloring"
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@ -228,17 +228,6 @@ STYLE_LONG = 2 << 19, /* one record per line, extended info */
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STYLE_SINGLE = 3 << 19, /* one record per line */
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STYLE_MASK = STYLE_SINGLE,
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/* how will the files be sorted (CONFIG_FEATURE_LS_SORTFILES) */
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SORT_REVERSE = 1 << 23,
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SORT_DIRS_FIRST = 1 << 24,
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SORT_NAME = 0, /* sort by file name */
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SORT_SIZE = 1 << 25, /* sort by file size */
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SORT_TIME = 2 << 25, /* sort by {a,m,c}time */
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SORT_VERSION = 3 << 25, /* sort by version */
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SORT_EXT = 4 << 25, /* sort by file name extension */
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SORT_MASK = (7 << 25) * ENABLE_FEATURE_LS_SORTFILES,
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LIST_LONG = LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \
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LIST_DATE_TIME | LIST_SYMLINK,
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};
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@ -256,12 +245,13 @@ LIST_LONG = LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \
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/* -T WIDTH Ignored (we don't use tabs on output) */
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/* -Z SELinux mandated option, busybox optionally supports */
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static const char ls_options[] ALIGN1 =
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"Cadi1lgnsxQAk" /* 13 opts, total 13 */
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IF_FEATURE_LS_TIMESTAMPS("ctu") /* 3, 16 */
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IF_FEATURE_LS_SORTFILES("SXrv") /* 4, 20 */
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IF_FEATURE_LS_FILETYPES("Fp") /* 2, 22 */
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IF_FEATURE_LS_RECURSIVE("R") /* 1, 23 */
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IF_SELINUX("Z") /* 1, 24 */
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"Cadi1lgnsxAk" /* 12 opts, total 12 */
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IF_FEATURE_LS_FILETYPES("Fp") /* 2, 14 */
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IF_FEATURE_LS_RECURSIVE("R") /* 1, 15 */
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IF_SELINUX("Z") /* 1, 16 */
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"Q" /* 1, 17 */
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IF_FEATURE_LS_TIMESTAMPS("ctu") /* 3, 20 */
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IF_FEATURE_LS_SORTFILES("SXrv") /* 4, 24 */
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IF_FEATURE_LS_FOLLOWLINKS("LH") /* 2, 26 */
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IF_FEATURE_HUMAN_READABLE("h") /* 1, 27 */
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IF_FEATURE_LS_WIDTH("T:w:") /* 2, 29 */
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@ -277,22 +267,22 @@ enum {
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//OPT_n = (1 << 7),
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//OPT_s = (1 << 8),
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//OPT_x = (1 << 9),
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OPT_Q = (1 << 10),
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//OPT_A = (1 << 11),
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//OPT_k = (1 << 12),
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//OPT_A = (1 << 10),
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//OPT_k = (1 << 11),
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OPTBIT_c = 13,
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OPTBIT_t,
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OPTBIT_u,
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OPTBIT_S = OPTBIT_c + 3 * ENABLE_FEATURE_LS_TIMESTAMPS,
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OPTBIT_X, /* 17 */
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OPTBIT_r,
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OPTBIT_v,
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OPTBIT_F = OPTBIT_S + 4 * ENABLE_FEATURE_LS_SORTFILES,
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OPTBIT_p, /* 21 */
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OPTBIT_F = 12,
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OPTBIT_p, /* 13 */
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OPTBIT_R = OPTBIT_F + 2 * ENABLE_FEATURE_LS_FILETYPES,
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OPTBIT_Z = OPTBIT_R + 1 * ENABLE_FEATURE_LS_RECURSIVE,
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OPTBIT_L = OPTBIT_Z + 2 * ENABLE_SELINUX,
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OPTBIT_Q = OPTBIT_Z + 1 * ENABLE_SELINUX,
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OPTBIT_c, /* 17 */
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OPTBIT_t, /* 18 */
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OPTBIT_u, /* 19 */
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OPTBIT_S = OPTBIT_c + 3 * ENABLE_FEATURE_LS_TIMESTAMPS,
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OPTBIT_X, /* 21 */
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OPTBIT_r, /* 22 */
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OPTBIT_v, /* 23 */
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OPTBIT_L = OPTBIT_S + 4 * ENABLE_FEATURE_LS_SORTFILES,
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OPTBIT_H, /* 25 */
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OPTBIT_h = OPTBIT_L + 2 * ENABLE_FEATURE_LS_FOLLOWLINKS,
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OPTBIT_T = OPTBIT_h + 1 * ENABLE_FEATURE_HUMAN_READABLE,
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@ -302,6 +292,11 @@ enum {
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OPTBIT_color, /* 31 */
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/* with long opts, we use all 32 bits */
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OPT_F = (1 << OPTBIT_F) * ENABLE_FEATURE_LS_FILETYPES,
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OPT_p = (1 << OPTBIT_p) * ENABLE_FEATURE_LS_FILETYPES,
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OPT_R = (1 << OPTBIT_R) * ENABLE_FEATURE_LS_RECURSIVE,
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OPT_Z = (1 << OPTBIT_Z) * ENABLE_SELINUX,
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OPT_Q = (1 << OPTBIT_Q),
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OPT_c = (1 << OPTBIT_c) * ENABLE_FEATURE_LS_TIMESTAMPS,
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OPT_t = (1 << OPTBIT_t) * ENABLE_FEATURE_LS_TIMESTAMPS,
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OPT_u = (1 << OPTBIT_u) * ENABLE_FEATURE_LS_TIMESTAMPS,
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@ -309,10 +304,6 @@ enum {
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OPT_X = (1 << OPTBIT_X) * ENABLE_FEATURE_LS_SORTFILES,
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OPT_r = (1 << OPTBIT_r) * ENABLE_FEATURE_LS_SORTFILES,
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OPT_v = (1 << OPTBIT_v) * ENABLE_FEATURE_LS_SORTFILES,
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OPT_F = (1 << OPTBIT_F) * ENABLE_FEATURE_LS_FILETYPES,
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OPT_p = (1 << OPTBIT_p) * ENABLE_FEATURE_LS_FILETYPES,
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OPT_R = (1 << OPTBIT_R) * ENABLE_FEATURE_LS_RECURSIVE,
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OPT_Z = (1 << OPTBIT_Z) * ENABLE_SELINUX,
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OPT_L = (1 << OPTBIT_L) * ENABLE_FEATURE_LS_FOLLOWLINKS,
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OPT_H = (1 << OPTBIT_H) * ENABLE_FEATURE_LS_FOLLOWLINKS,
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OPT_h = (1 << OPTBIT_h) * ENABLE_FEATURE_HUMAN_READABLE,
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@ -335,20 +326,8 @@ static const uint32_t opt_flags[] = {
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LIST_LONG | STYLE_LONG | LIST_ID_NUMERIC, /* n (assumes l) */
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LIST_BLOCKS, /* s */
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DISP_ROWS | STYLE_COLUMNAR, /* x */
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0, /* Q (quote filename) - handled via OPT_Q */
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DISP_HIDDEN, /* A */
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ENABLE_SELINUX * (LIST_CONTEXT|STYLE_SINGLE), /* k (ignored if !SELINUX) */
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#if ENABLE_FEATURE_LS_TIMESTAMPS
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0, /* c - handled via OPT_c */
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(ENABLE_FEATURE_LS_SORTFILES * SORT_TIME), /* t */
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0, /* u - handled via OPT_u */
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#endif
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#if ENABLE_FEATURE_LS_SORTFILES
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SORT_SIZE, /* S */
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SORT_EXT, /* X */
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SORT_REVERSE, /* r */
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SORT_VERSION, /* v */
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#endif
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#if ENABLE_FEATURE_LS_FILETYPES
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LIST_FILETYPE | LIST_CLASSIFY, /* F */
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LIST_FILETYPE, /* p */
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@ -930,30 +909,30 @@ static int sortcmp(const void *a, const void *b)
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{
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struct dnode *d1 = *(struct dnode **)a;
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struct dnode *d2 = *(struct dnode **)b;
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unsigned sort_opts = G.all_fmt & SORT_MASK;
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unsigned opt = option_mask32;
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off_t dif;
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dif = 0; /* assume SORT_NAME */
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dif = 0; /* assume sort by name */
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// TODO: use pre-initialized function pointer
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// instead of branch forest
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if (G.all_fmt & SORT_DIRS_FIRST) {
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if (opt & OPT_dirs_first) {
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dif = S_ISDIR(d2->dn_mode) - S_ISDIR(d1->dn_mode);
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if (dif != 0)
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goto maybe_invert_and_ret;
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}
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if (sort_opts == SORT_SIZE) {
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if (opt & OPT_S) { /* sort by size */
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dif = (d2->dn_size - d1->dn_size);
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} else
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if (sort_opts == SORT_TIME) {
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if (opt & OPT_t) { /* sort by time */
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dif = (d2->dn_time - d1->dn_time);
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} else
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#if defined(HAVE_STRVERSCMP) && HAVE_STRVERSCMP == 1
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if (sort_opts == SORT_VERSION) {
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if (opt & OPT_v) { /* sort by version */
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dif = strverscmp(d1->name, d2->name);
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} else
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#endif
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if (sort_opts == SORT_EXT) {
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if (opt & OPT_X) { /* sort by extension */
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dif = strcmp(strchrnul(d1->name, '.'), strchrnul(d2->name, '.'));
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}
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if (dif == 0) {
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@ -962,18 +941,17 @@ static int sortcmp(const void *a, const void *b)
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dif = strcoll(d1->name, d2->name);
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else
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dif = strcmp(d1->name, d2->name);
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}
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/* Make dif fit into an int */
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if (sizeof(dif) > sizeof(int)) {
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enum { BITS_TO_SHIFT = 8 * (sizeof(dif) - sizeof(int)) };
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/* shift leaving only "int" worth of bits */
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if (dif != 0) {
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} else {
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/* Make dif fit into an int */
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if (sizeof(dif) > sizeof(int)) {
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enum { BITS_TO_SHIFT = 8 * (sizeof(dif) - sizeof(int)) };
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/* shift leaving only "int" worth of bits */
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/* (this requires dif != 0, and here it is nonzero) */
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dif = 1 | (int)((uoff_t)dif >> BITS_TO_SHIFT);
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}
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}
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maybe_invert_and_ret:
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return (G.all_fmt & SORT_REVERSE) ? -(int)dif : (int)dif;
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return (opt & OPT_r) ? -(int)dif : (int)dif;
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}
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static void dnsort(struct dnode **dn, int size)
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@ -1162,9 +1140,6 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
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init_unicode();
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if (ENABLE_FEATURE_LS_SORTFILES)
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G.all_fmt = SORT_NAME;
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#if ENABLE_FEATURE_LS_WIDTH
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/* obtain the terminal width */
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G_terminal_width = get_terminal_width(STDIN_FILENO);
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@ -1209,14 +1184,10 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
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if (flags & STYLE_MASK)
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G.all_fmt &= ~STYLE_MASK;
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if (flags & SORT_MASK)
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G.all_fmt &= ~SORT_MASK;
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G.all_fmt |= flags;
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}
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}
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if (opt & OPT_dirs_first)
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G.all_fmt |= SORT_DIRS_FIRST;
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if (opt & OPT_full_time)
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G.all_fmt |= LIST_FULLTIME;
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@ -1256,7 +1227,7 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
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/* without -l, bare -c or -u enable sort too */
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/* (with -l, bare -c or -u just select which time to show) */
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if (opt & (OPT_c|OPT_u)) {
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G.all_fmt = (G.all_fmt & ~SORT_MASK) | SORT_TIME;
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option_mask32 |= OPT_t;
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}
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}
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}
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