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https://github.com/jarun/nnn.git
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Home-grown APIs, reduced binary size (<40KB)
This commit is contained in:
Arun Prakash Jana
parent
00f9ae9c85
commit
3bf858a580
117
nnn.c
117
nnn.c
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@ -178,6 +178,7 @@ static size_t fs_free;
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static uint open_max;
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static bm bookmark[MAX_BM];
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static const double div_2_pow_10 = 1.0 / 1024.0;
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static uint _WSHIFT;
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/* Utilities to open files, run actions */
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static char *utils[] = {
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@ -239,15 +240,96 @@ max_openfds()
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return 32;
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}
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/* Just a safe strncpy(3) */
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static void
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/*
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* Custom xstrlen()
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*/
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static size_t
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xstrlen(const char *s)
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{
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static size_t len;
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if (!s)
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return 0;
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len = 0;
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while (*s) {
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++len, ++s;
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}
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return len;
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}
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/*
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* Just a safe strncpy(3)
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* Always null ('\0') terminates if both src and dest are valid pointers.
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* Returns the number of bytes copied including terminating null byte.
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*/
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static size_t
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xstrlcpy(char *dest, const char *src, size_t n)
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{
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static size_t len, blocks;
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if (!src || !dest)
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return 0;
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len = xstrlen(src) + 1;
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if (n > len)
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n = len;
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else if (len > n)
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/* Save total number of bytes to copy in len */
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len = n;
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blocks = n >> _WSHIFT;
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n -= (blocks << _WSHIFT);
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if (blocks) {
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static ulong *s, *d;
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s = (ulong *)src;
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d = (ulong *)dest;
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while (blocks) {
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*d = *s;
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++d, ++s;
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--blocks;
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}
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if (!n) {
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dest = (char *)d;
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*--dest = '\0';
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return len;
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}
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src = (char *)s;
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dest = (char *)d;
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}
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while (--n && (*dest = *src))
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++dest, ++src;
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if (!n)
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*dest = '\0';
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return len;
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}
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/*
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* Custom strcmp(), just what we need.
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* Returns 0 if same, else -1
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*/
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static int
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xstrcmp(const char *s1, const char *s2)
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{
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if (!s1 || !s2)
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return -1;
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while (*s1 && *s1 == *s2)
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++s1, ++s2;
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if (*s1 != *s2)
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return -1;
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return 0;
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}
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/*
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@ -518,7 +600,7 @@ strstrip(char *s)
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if (!s || !*s)
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return s;
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size_t len = strlen(s) - 1;
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size_t len = xstrlen(s) - 1;
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while (len != 0 && (isspace(s[len]) || s[len] == '/'))
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--len;
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@ -868,7 +950,7 @@ mkpath(char *dir, char *name, char *out, size_t n)
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xstrlcpy(out, name, n);
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else {
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/* Handle root case */
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if (strcmp(dir, "/") == 0)
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if (dir[0] == '/' && dir[1] == '\0')
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snprintf(out, n, "/%s", name);
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else
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snprintf(out, n, "%s/%s", dir, name);
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@ -1612,7 +1694,7 @@ dentfind(struct entry *dents, int n, char *path)
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DPRINTF_S(p);
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for (i = 0; i < n; ++i)
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if (strcmp(p, dents[i].name) == 0)
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if (xstrcmp(p, dents[i].name) == 0)
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return i;
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return 0;
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@ -1657,7 +1739,7 @@ redraw(char *path)
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erase();
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/* Strip trailing slashes */
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for (i = strlen(path) - 1; i > 0; --i)
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for (i = xstrlen(path) - 1; i > 0; --i)
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if (path[i] == '/')
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path[i] = '\0';
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else
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@ -1675,7 +1757,8 @@ redraw(char *path)
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ncols = COLS;
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if (ncols > PATH_MAX)
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ncols = PATH_MAX;
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g_buf[ncols - strlen(CWD) - 1] = '\0';
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/* - xstrlen(CWD) - 1 = 6 */
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g_buf[ncols - 6] = '\0';
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printw(CWD "%s\n\n", g_buf);
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if (cfg.showcolor) {
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@ -2069,7 +2152,7 @@ nochange:
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if (truecd == 0) {
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/* Probable change in dir */
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/* No-op if it's the same directory */
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if (strcmp(path, newpath) == 0)
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if (xstrcmp(path, newpath) == 0)
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break;
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oldpath[0] = '\0';
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@ -2102,7 +2185,7 @@ nochange:
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goto nochange;
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}
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if (strcmp(path, tmp) == 0)
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if (xstrcmp(path, tmp) == 0)
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break;
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/* Save last working directory */
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@ -2122,7 +2205,7 @@ nochange:
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goto nochange;
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}
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if (strcmp(path, ipath) == 0)
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if (xstrcmp(path, ipath) == 0)
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break;
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/* Save last working directory */
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@ -2166,7 +2249,7 @@ nochange:
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clearprompt();
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for (r = 0; bookmark[r].key && r < MAX_BM; ++r) {
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if (strcmp(bookmark[r].key, tmp) == 0) {
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if (xstrcmp(bookmark[r].key, tmp) == 0) {
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if (bookmark[r].loc[0] == '~') {
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/* Expand ~ to HOME */
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char *home = getenv("HOME");
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@ -2191,7 +2274,7 @@ nochange:
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goto nochange;
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}
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if (strcmp(path, newpath) == 0)
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if (xstrcmp(path, newpath) == 0)
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break;
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oldpath[0] = '\0';
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@ -2325,7 +2408,7 @@ nochange:
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goto begin;
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case SEL_COPY:
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if (copier && ndents) {
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if (strcmp(path, "/") == 0)
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if (path[0] == '/' && path[1] == '\0')
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snprintf(newpath, PATH_MAX, "/%s",
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dents[cur].name);
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else
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@ -2435,6 +2518,14 @@ main(int argc, char *argv[])
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}
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}
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/* Set the word shift */
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_WSHIFT = sizeof(ulong);
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if (_WSHIFT == 8)
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_WSHIFT = 3;
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else
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_WSHIFT = 2;
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/* Increase current open file descriptor limit */
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open_max = max_openfds();
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if (getuid() == 0)
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