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Use NAME_MAX, reuse newpath, update stats

This commit is contained in:
Arun Prakash Jana 2017-04-20 23:20:28 +05:30
parent 79c1c56cbf
commit f10ef49534
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GPG Key ID: A75979F35C080412
2 changed files with 30 additions and 50 deletions
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11
README.md
View File

@ -123,20 +123,21 @@ I chose to fork because:
### Performance
nnn vs. ncdu memory usage while listing `/usr/bin` with 1439 entries in disk usage analyzer mode, sorted by total content size:
nnn vs. ncdu memory usage while listing an external disk with 13,790 files in disk usage analyzer mode:
```
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10406 vaio 20 0 53808 42284 2248 S 0.0 0.8 0:00.82 ncdu
10409 vaio 20 0 20452 9172 2356 S 0.0 0.2 0:00.83 nnn -d
31163 vaio 20 0 65508 53980 2320 S 0.0 1.1 0:01.96 ncdu /
28863 vaio 20 0 24276 11088 2776 S 0.3 0.2 0:02.61 nnn -d
```
nnn vs. ranger memory usage while viewing a directory with 10,178 files, sorted by size:
nnn vs. mc vs. ranger memory usage while viewing a directory with 10,178 files, sorted by size:
```
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
22465 vaio 20 0 233956 192136 7896 S 0.0 3.9 0:05.31 /usr/bin/python -O /usr/bin/ranger
21743 vaio 20 0 55984 44648 2468 S 0.0 0.9 0:01.17 nnn -d
20369 vaio 20 0 64664 10980 6888 S 0.0 0.2 0:00.70 mc
28863 vaio 20 0 20600 7220 2648 S 0.0 0.1 0:00.36 nnn -d
```
### Installation

69
nnn.c
View File

@ -63,7 +63,7 @@ xprintf(int fd, const char *fmt, ...)
#define CONTROL(c) ((c) ^ 0x40)
#define TOUPPER(ch) \
(((ch) >= 'a' && (ch) <= 'z') ? ((ch) - 'a' + 'A') : (ch))
#define MAX_CMD_LEN (PATH_MAX << 1)
#define MAX_CMD_LEN 5120
#define CURSYM(flag) (flag ? CURSR : EMPTY)
struct assoc {
@ -111,7 +111,7 @@ struct key {
#include "config.h"
typedef struct entry {
char name[PATH_MAX];
char name[NAME_MAX];
mode_t mode;
time_t t;
off_t size;
@ -229,73 +229,55 @@ xmemrchr(const void *s, int c, size_t n)
return NULL;
}
#if 0
/* Some implementations of dirname(3) may modify `path' and some
* return a pointer inside `path'. */
static char *
xdirname(const char *path)
{
static char out[PATH_MAX];
char tmp[PATH_MAX], *p;
xstrlcpy(tmp, path, sizeof(tmp));
p = dirname(tmp);
if (p == NULL)
printerr(1, "dirname");
xstrlcpy(out, p, sizeof(out));
return out;
}
#endif
/*
* The following dirname(3) implementation does not
* change the input. We use a copy of the original.
* modify the input. We use a copy of the original.
*
* Modified from the glibc (GNU LGPL) version.
*/
static char *
xdirname(const char *path)
{
static char name[PATH_MAX];
static char buf[PATH_MAX];
char *last_slash;
xstrlcpy(name, path, PATH_MAX);
xstrlcpy(buf, path, PATH_MAX);
/* Find last '/'. */
last_slash = strrchr(name, '/');
last_slash = strrchr(buf, '/');
if (last_slash != NULL && last_slash != name && last_slash[1] == '\0') {
if (last_slash != NULL && last_slash != buf && last_slash[1] == '\0') {
/* Determine whether all remaining characters are slashes. */
char *runp;
for (runp = last_slash; runp != name; --runp)
for (runp = last_slash; runp != buf; --runp)
if (runp[-1] != '/')
break;
/* The '/' is the last character, we have to look further. */
if (runp != name)
last_slash = xmemrchr(name, '/', runp - name);
if (runp != buf)
last_slash = xmemrchr(buf, '/', runp - buf);
}
if (last_slash != NULL) {
/* Determine whether all remaining characters are slashes. */
char *runp;
for (runp = last_slash; runp != name; --runp)
for (runp = last_slash; runp != buf; --runp)
if (runp[-1] != '/')
break;
/* Terminate the name. */
if (runp == name) {
/* Terminate the buffer. */
if (runp == buf) {
/* The last slash is the first character in the string.
We have to return "/". As a special case we have to
return "//" if there are exactly two slashes at the
beginning of the string. See XBD 4.10 Path Name
Resolution for more information. */
if (last_slash == name + 1)
if (last_slash == buf + 1)
++last_slash;
else
last_slash = name + 1;
last_slash = buf + 1;
} else
last_slash = runp;
@ -304,11 +286,11 @@ xdirname(const char *path)
/* This assignment is ill-designed but the XPG specs require to
return a string containing "." in any case no directory part
is found and so a static and constant string is required. */
name[0] = '.';
name[1] = '\0';
buf[0] = '.';
buf[1] = '\0';
}
return name;
return buf;
}
static void
@ -1452,8 +1434,7 @@ nochange:
case SEL_CD:
{
/* Read target dir */
char cwd[PATH_MAX];
tmp = getcwd(cwd, PATH_MAX);
tmp = getcwd(newpath, PATH_MAX);
if (tmp == NULL) {
printwarn();
goto nochange;
@ -1468,7 +1449,7 @@ nochange:
char *tmp = readline("chdir: ");
initcurses();
if (chdir(cwd) == -1)
if (chdir(newpath) == -1)
printwarn();
/* Save current */
@ -1641,16 +1622,14 @@ nochange:
goto begin;
case SEL_COPY:
if (copier && ndents) {
char abspath[PATH_MAX];
if (strcmp(path, "/") == 0)
snprintf(abspath, PATH_MAX, "/%s",
snprintf(newpath, PATH_MAX, "/%s",
dents[cur].name);
else
snprintf(abspath, PATH_MAX, "%s/%s",
snprintf(newpath, PATH_MAX, "%s/%s",
path, dents[cur].name);
spawn(copier, abspath, NULL, 0);
printmsg(abspath);
spawn(copier, newpath, NULL, 0);
printmsg(newpath);
} else if (!copier)
printmsg("NNN_COPIER is not set");
goto nochange;