mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-11-24 12:19:49 +00:00
vi: some simplifications
function old new delta file_insert 301 315 +14 init_text_buffer 179 171 -8 colon 2889 2878 -11 file_size 37 - -37 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/2 up/down: 14/-56) Total: -42 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
e7430867a8
commit
32afd3aa60
236
editors/vi.c
236
editors/vi.c
@ -491,7 +491,6 @@ struct globals {
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} while (0)
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static int init_text_buffer(char *); // init from file or create new
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static void edit_file(char *); // edit one file
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static void do_cmd(int); // execute a command
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static int next_tabstop(int);
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@ -543,7 +542,6 @@ static void cookmode(void); // return to "cooked" mode on tty
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static int mysleep(int);
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static int readit(void); // read (maybe cursor) key from stdin
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static int get_one_char(void); // read 1 char from stdin
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static int file_size(const char *); // what is the byte size of "fn"
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#if !ENABLE_FEATURE_VI_READONLY
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#define file_insert(fn, p, update_ro_status) file_insert(fn, p)
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#endif
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@ -578,8 +576,8 @@ static char *char_search(char *, const char *, int, int); // search for pattern
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#if ENABLE_FEATURE_VI_COLON
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static char *get_one_address(char *, int *); // get colon addr, if present
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static char *get_address(char *, int *, int *); // get two colon addrs, if present
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static void colon(char *); // execute the "colon" mode cmds
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#endif
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static void colon(char *); // execute the "colon" mode cmds
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#if ENABLE_FEATURE_VI_USE_SIGNALS
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static void winch_sig(int); // catch window size changes
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static void suspend_sig(int); // catch ctrl-Z
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@ -725,32 +723,29 @@ int vi_main(int argc, char **argv)
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static int init_text_buffer(char *fn)
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{
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int rc;
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int size = file_size(fn); // file size. -1 means does not exist.
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flush_undo_data();
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modified_count = 0;
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last_modified_count = -1;
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#if ENABLE_FEATURE_VI_YANKMARK
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/* init the marks */
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memset(mark, 0, sizeof(mark));
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#endif
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/* allocate/reallocate text buffer */
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free(text);
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text_size = size + 10240;
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text_size = 10240;
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screenbegin = dot = end = text = xzalloc(text_size);
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if (fn != current_filename) {
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free(current_filename);
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current_filename = xstrdup(fn);
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}
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if (size < 0) {
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rc = file_insert(fn, text, 1);
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if (rc < 0) {
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// file doesnt exist. Start empty buf with dummy line
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char_insert(text, '\n', NO_UNDO);
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rc = 0;
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} else {
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rc = file_insert(fn, text, 1);
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}
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modified_count = 0;
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last_modified_count = -1;
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#if ENABLE_FEATURE_VI_YANKMARK
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/* init the marks. */
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memset(mark, 0, sizeof(mark));
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#endif
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return rc;
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}
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@ -1018,13 +1013,71 @@ static void setops(const char *args, const char *opname, int flg_no,
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}
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#endif
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#endif /* FEATURE_VI_COLON */
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// buf must be no longer than MAX_INPUT_LEN!
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static void colon(char *buf)
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{
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#if !ENABLE_FEATURE_VI_COLON
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/* Simple ":cmd" handler with minimal set of commands */
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char *p = buf;
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int cnt;
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if (*p == ':')
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p++;
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cnt = strlen(p);
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if (cnt == 0)
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return;
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if (strncmp(p, "quit", cnt) == 0
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|| strncmp(p, "q!", cnt) == 0
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) {
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if (modified_count && p[1] != '!') {
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status_line_bold("No write since last change (:%s! overrides)", p);
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} else {
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editing = 0;
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}
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return;
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}
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if (strncmp(p, "write", cnt) == 0
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|| strncmp(p, "wq", cnt) == 0
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|| strncmp(p, "wn", cnt) == 0
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|| (p[0] == 'x' && !p[1])
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) {
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cnt = file_write(current_filename, text, end - 1);
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if (cnt < 0) {
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if (cnt == -1)
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status_line_bold("Write error: %s", strerror(errno));
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} else {
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modified_count = 0;
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last_modified_count = -1;
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status_line("'%s' %dL, %dC",
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current_filename,
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count_lines(text, end - 1), cnt
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);
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if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
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|| p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
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) {
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editing = 0;
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}
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}
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return;
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}
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if (strncmp(p, "file", cnt) == 0) {
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last_status_cksum = 0; // force status update
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return;
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}
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if (sscanf(p, "%d", &cnt) > 0) {
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dot = find_line(cnt);
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dot_skip_over_ws();
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return;
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}
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not_implemented(p);
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#else
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char c, *orig_buf, *buf1, *q, *r;
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char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
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int i, l, li, ch, b, e;
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int useforce, forced = FALSE;
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int i, l, li, b, e;
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int useforce;
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// :3154 // if (-e line 3154) goto it else stay put
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// :4,33w! foo // write a portion of buffer to file "foo"
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@ -1046,7 +1099,7 @@ static void colon(char *buf)
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if (*buf == ':')
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buf++; // move past the ':'
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li = ch = i = 0;
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li = i = 0;
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b = e = -1;
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q = text; // assume 1,$ for the range
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r = end - 1;
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@ -1127,6 +1180,8 @@ static void colon(char *buf)
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dot = yank_delete(q, r, 1, YANKDEL, ALLOW_UNDO); // save, then delete lines
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dot_skip_over_ws();
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} else if (strncmp(cmd, "edit", i) == 0) { // Edit a file
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int size;
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// don't edit, if the current file has been modified
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if (modified_count && !useforce) {
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status_line_bold("No write since last change (:%s! overrides)", cmd);
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@ -1144,8 +1199,7 @@ static void colon(char *buf)
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goto ret;
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}
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if (init_text_buffer(fn) < 0)
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goto ret;
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size = init_text_buffer(fn);
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#if ENABLE_FEATURE_VI_YANKMARK
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if (Ureg >= 0 && Ureg < 28) {
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@ -1161,12 +1215,14 @@ static void colon(char *buf)
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li = count_lines(text, end - 1);
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status_line("'%s'%s"
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IF_FEATURE_VI_READONLY("%s")
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" %dL, %dC", current_filename,
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(file_size(fn) < 0 ? " [New file]" : ""),
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" %dL, %dC",
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current_filename,
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(size < 0 ? " [New file]" : ""),
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IF_FEATURE_VI_READONLY(
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((readonly_mode) ? " [Readonly]" : ""),
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)
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li, ch);
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li, (int)(end - text)
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);
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} else if (strncmp(cmd, "file", i) == 0) { // what File is this
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if (b != -1 || e != -1) {
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status_line_bold("No address allowed on this command");
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@ -1255,6 +1311,8 @@ static void colon(char *buf)
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}
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editing = 0;
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} else if (strncmp(cmd, "read", i) == 0) { // read file into text[]
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int size;
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fn = args;
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if (!fn[0]) {
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status_line_bold("No filename given");
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@ -1268,23 +1326,24 @@ static void colon(char *buf)
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q = next_line(q);
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{ // dance around potentially-reallocated text[]
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uintptr_t ofs = q - text;
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ch = file_insert(fn, q, 0);
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size = file_insert(fn, q, /*update_ro:*/ 0);
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q = text + ofs;
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}
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if (ch < 0)
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if (size < 0)
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goto ret; // nothing was inserted
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// how many lines in text[]?
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li = count_lines(q, q + ch - 1);
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li = count_lines(q, q + size - 1);
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status_line("'%s'"
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IF_FEATURE_VI_READONLY("%s")
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" %dL, %dC", fn,
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" %dL, %dC",
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fn,
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IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
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li, ch);
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if (ch > 0) {
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li, size
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);
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if (size > 0) {
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// if the insert is before "dot" then we need to update
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if (q <= dot)
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dot += ch;
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// modified_count++;
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dot += size;
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}
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} else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args
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if (modified_count && !useforce) {
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@ -1409,6 +1468,9 @@ static void colon(char *buf)
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|| strncmp(cmd, "wn", i) == 0
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|| (cmd[0] == 'x' && !cmd[1])
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) {
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int size;
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//int forced = FALSE;
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// is there a file name to write to?
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if (args[0]) {
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fn = args;
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@ -1421,34 +1483,33 @@ static void colon(char *buf)
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#endif
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// how many lines in text[]?
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li = count_lines(q, r);
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ch = r - q + 1;
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// see if file exists- if not, its just a new file request
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if (useforce) {
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size = r - q + 1;
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//if (useforce) {
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// if "fn" is not write-able, chmod u+w
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// sprintf(syscmd, "chmod u+w %s", fn);
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// system(syscmd);
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forced = TRUE;
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}
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// forced = TRUE;
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//}
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l = file_write(fn, q, r);
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if (useforce && forced) {
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//if (useforce && forced) {
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// chmod u-w
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// sprintf(syscmd, "chmod u-w %s", fn);
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// system(syscmd);
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forced = FALSE;
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}
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// forced = FALSE;
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//}
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if (l < 0) {
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if (l == -1)
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status_line_bold_errno(fn);
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} else {
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status_line("'%s' %dL, %dC", fn, li, l);
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if (q == text && r == end - 1 && l == ch) {
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if (q == text && r == end - 1 && l == size) {
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modified_count = 0;
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last_modified_count = -1;
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}
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if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n'
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|| cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N'
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)
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&& l == ch
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&& l == size
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) {
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editing = 0;
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}
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@ -1475,9 +1536,8 @@ static void colon(char *buf)
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colon_s_fail:
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status_line(":s expression missing delimiters");
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#endif
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}
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#endif /* FEATURE_VI_COLON */
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}
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static void Hit_Return(void)
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{
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@ -2851,17 +2911,6 @@ static char *get_input_line(const char *prompt)
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#undef buf
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}
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static int file_size(const char *fn) // what is the byte size of "fn"
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{
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struct stat st_buf;
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int cnt;
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cnt = -1;
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if (fn && stat(fn, &st_buf) == 0) // see if file exists
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cnt = (int) st_buf.st_size;
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return cnt;
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}
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// might reallocate text[]!
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static int file_insert(const char *fn, char *p, int update_ro_status)
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{
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@ -2869,42 +2918,40 @@ static int file_insert(const char *fn, char *p, int update_ro_status)
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int fd, size;
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struct stat statbuf;
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/* Validate file */
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if (stat(fn, &statbuf) < 0) {
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status_line_bold_errno(fn);
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goto fi0;
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}
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if (!S_ISREG(statbuf.st_mode)) {
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// This is not a regular file
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status_line_bold("'%s' is not a regular file", fn);
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goto fi0;
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}
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if (p < text || p > end) {
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status_line_bold("Trying to insert file outside of memory");
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goto fi0;
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return cnt;
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}
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// read file to buffer
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fd = open(fn, O_RDONLY);
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if (fd < 0) {
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status_line_bold_errno(fn);
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goto fi0;
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return cnt;
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}
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/* Validate file */
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if (fstat(fd, &statbuf) < 0) {
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status_line_bold_errno(fn);
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goto fi;
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}
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if (!S_ISREG(statbuf.st_mode)) {
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status_line_bold("'%s' is not a regular file", fn);
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goto fi;
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}
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size = (statbuf.st_size < INT_MAX ? (int)statbuf.st_size : INT_MAX);
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p += text_hole_make(p, size);
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cnt = safe_read(fd, p, size);
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cnt = full_read(fd, p, size);
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if (cnt < 0) {
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status_line_bold_errno(fn);
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p = text_hole_delete(p, p + size - 1, NO_UNDO); // un-do buffer insert
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} else if (cnt < size) {
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// There was a partial read, shrink unused space text[]
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p = text_hole_delete(p + cnt, p + size - 1, NO_UNDO); // un-do buffer insert
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// There was a partial read, shrink unused space
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p = text_hole_delete(p + cnt, p + size - 1, NO_UNDO);
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status_line_bold("can't read '%s'", fn);
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}
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// if (cnt >= size)
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// modified_count++;
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fi:
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close(fd);
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fi0:
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#if ENABLE_FEATURE_VI_READONLY
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if (update_ro_status
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&& ((access(fn, W_OK) < 0) ||
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@ -3821,50 +3868,7 @@ static void do_cmd(int c)
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break;
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case ':': // :- the colon mode commands
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p = get_input_line(":"); // get input line- use "status line"
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#if ENABLE_FEATURE_VI_COLON
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colon(p); // execute the command
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#else
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if (*p == ':')
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p++; // move past the ':'
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cnt = strlen(p);
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if (cnt <= 0)
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break;
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if (strncmp(p, "quit", cnt) == 0
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|| strncmp(p, "q!", cnt) == 0 // delete lines
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) {
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if (modified_count && p[1] != '!') {
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status_line_bold("No write since last change (:%s! overrides)", p);
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} else {
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editing = 0;
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}
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} else if (strncmp(p, "write", cnt) == 0
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|| strncmp(p, "wq", cnt) == 0
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|| strncmp(p, "wn", cnt) == 0
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|| (p[0] == 'x' && !p[1])
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) {
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cnt = file_write(current_filename, text, end - 1);
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if (cnt < 0) {
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if (cnt == -1)
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status_line_bold("Write error: %s", strerror(errno));
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} else {
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modified_count = 0;
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last_modified_count = -1;
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status_line("'%s' %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
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if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
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|| p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
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) {
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editing = 0;
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}
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}
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} else if (strncmp(p, "file", cnt) == 0) {
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last_status_cksum = 0; // force status update
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} else if (sscanf(p, "%d", &j) > 0) {
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dot = find_line(j); // go to line # j
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dot_skip_over_ws();
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} else { // unrecognized cmd
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not_implemented(p);
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}
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#endif /* !FEATURE_VI_COLON */
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break;
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case '<': // <- Left shift something
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case '>': // >- Right shift something
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