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https://github.com/tmux/tmux.git
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Tidy up by breaking the # replacement code into a separate function, also add a
few comments.
This commit is contained in:
Nicholas Marriott
225
status.c
225
status.c
@@ -33,6 +33,8 @@ char *status_job(struct client *, char **);
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void status_job_callback(struct job *);
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size_t status_width(struct winlink *);
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char *status_print(struct session *, struct winlink *, struct grid_cell *);
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void status_replace1(
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struct client *, char **, char **, char *, size_t, int);
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void status_message_callback(int, short, void *);
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void status_prompt_add_history(struct client *);
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@@ -318,139 +320,133 @@ out:
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return (1);
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}
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char *
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status_replace(struct client *c, const char *fmt, time_t t, int run_jobs)
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/* Replace a single special sequence (prefixed by #). */
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void
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status_replace1(struct client *c,
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char **iptr, char **optr, char *out, size_t outsize, int jobsflag)
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{
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struct session *s = c->session;
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struct winlink *wl = s->curw;
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static char out[BUFSIZ];
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char in[BUFSIZ], tmp[256], ch, *iptr, *optr, *ptr, *endptr;
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char *savedptr; /* freed at end of each loop */
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size_t len;
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long n;
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char ch, tmp[256], *ptr, *endptr, *freeptr;
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size_t ptrlen;
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long limit;
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errno = 0;
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limit = strtol(*iptr, &endptr, 10);
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if ((limit == 0 && errno != EINVAL) ||
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(limit == LONG_MIN && errno != ERANGE) ||
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(limit == LONG_MAX && errno != ERANGE) ||
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limit != 0)
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*iptr = endptr;
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if (limit <= 0)
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limit = LONG_MAX;
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freeptr = NULL;
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switch (*(*iptr)++) {
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case '(':
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if (!jobsflag) {
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ch = ')';
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goto skip_to;
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}
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if ((ptr = status_job(c, iptr)) == NULL)
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return;
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freeptr = ptr;
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goto do_replace;
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case 'H':
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if (gethostname(tmp, sizeof tmp) != 0)
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fatal("gethostname failed");
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ptr = tmp;
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goto do_replace;
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case 'I':
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xsnprintf(tmp, sizeof tmp, "%d", wl->idx);
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ptr = tmp;
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goto do_replace;
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case 'P':
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xsnprintf(tmp, sizeof tmp, "%u",
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window_pane_index(wl->window, wl->window->active));
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ptr = tmp;
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goto do_replace;
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case 'S':
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ptr = s->name;
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goto do_replace;
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case 'T':
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ptr = wl->window->active->base.title;
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goto do_replace;
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case 'W':
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ptr = wl->window->name;
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goto do_replace;
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case '[':
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/*
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* Embedded style, handled at display time. Leave present and
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* skip input until ].
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*/
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ch = ']';
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goto skip_to;
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case '#':
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*(*optr++) = '#';
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break;
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}
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return;
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do_replace:
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ptrlen = strlen(ptr);
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if ((size_t) limit < ptrlen)
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ptrlen = limit;
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if (*optr + ptrlen >= out + outsize - 1)
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return;
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while (ptrlen > 0 && *ptr != '\0') {
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*(*optr)++ = *ptr++;
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ptrlen--;
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}
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if (freeptr != NULL)
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xfree(freeptr);
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return;
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skip_to:
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*(*optr)++ = '#';
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(*iptr)--; /* include ch */
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while (**iptr != ch && **iptr != '\0') {
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if (*optr >= out + outsize - 1)
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break;
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*(*optr)++ = *(*iptr)++;
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}
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}
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/* Replace special sequences in fmt. */
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char *
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status_replace(struct client *c, const char *fmt, time_t t, int jobsflag)
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{
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static char out[BUFSIZ];
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char in[BUFSIZ], ch, *iptr, *optr;
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strftime(in, sizeof in, fmt, localtime(&t));
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in[(sizeof in) - 1] = '\0';
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iptr = in;
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optr = out;
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savedptr = NULL;
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while (*iptr != '\0') {
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if (optr >= out + (sizeof out) - 1)
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break;
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switch (ch = *iptr++) {
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case '#':
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errno = 0;
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n = strtol(iptr, &endptr, 10);
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if ((n == 0 && errno != EINVAL) ||
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(n == LONG_MIN && errno != ERANGE) ||
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(n == LONG_MAX && errno != ERANGE) ||
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n != 0)
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iptr = endptr;
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if (n <= 0)
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n = LONG_MAX;
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ch = *iptr++;
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ptr = NULL;
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switch (*iptr++) {
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case '(':
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if (run_jobs) {
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if (ptr == NULL) {
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ptr = status_job(c, &iptr);
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if (ptr == NULL)
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break;
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savedptr = ptr;
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}
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} else {
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/* Don't run jobs. Copy to ). */
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*optr++ = '#';
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iptr--; /* include [ */
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while (*iptr != ')' && *iptr != '\0') {
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if (optr >=
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out + (sizeof out) - 1)
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break;
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*optr++ = *iptr++;
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}
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break;
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}
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/* FALLTHROUGH */
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case 'H':
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if (ptr == NULL) {
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if (gethostname(tmp, sizeof tmp) != 0)
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fatal("gethostname failed");
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ptr = tmp;
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}
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/* FALLTHROUGH */
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case 'I':
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if (ptr == NULL) {
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xsnprintf(tmp, sizeof tmp, "%d", wl->idx);
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ptr = tmp;
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}
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/* FALLTHROUGH */
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case 'P':
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if (ptr == NULL) {
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xsnprintf(tmp, sizeof tmp, "%u",
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window_pane_index(wl->window,
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wl->window->active));
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ptr = tmp;
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}
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/* FALLTHROUGH */
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case 'S':
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if (ptr == NULL)
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ptr = s->name;
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/* FALLTHROUGH */
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case 'T':
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if (ptr == NULL)
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ptr = wl->window->active->base.title;
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/* FALLTHROUGH */
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case 'W':
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if (ptr == NULL)
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ptr = wl->window->name;
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len = strlen(ptr);
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if ((size_t) n < len)
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len = n;
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if (optr + len >= out + (sizeof out) - 1)
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break;
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while (len > 0 && *ptr != '\0') {
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*optr++ = *ptr++;
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len--;
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}
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break;
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case '[':
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/*
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* Embedded style, handled at display time.
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* Leave present and skip input until ].
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*/
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*optr++ = '#';
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iptr--; /* include [ */
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while (*iptr != ']' && *iptr != '\0') {
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if (optr >= out + (sizeof out) - 1)
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break;
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*optr++ = *iptr++;
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}
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break;
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case '#':
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*optr++ = '#';
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break;
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}
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if (savedptr != NULL) {
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xfree(savedptr);
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savedptr = NULL;
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}
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break;
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default:
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if (ch != '#') {
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*optr++ = ch;
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break;
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continue;
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}
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status_replace1(c, &iptr, &optr, out, sizeof out, jobsflag);
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}
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*optr = '\0';
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return (xstrdup(out));
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}
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/* Figure out job name and get its result, starting it off if necessary. */
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char *
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status_job(struct client *c, char **iptr)
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{
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@@ -498,6 +494,7 @@ status_job(struct client *c, char **iptr)
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return (xstrdup(job->data));
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}
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/* Job has finished: save its result. */
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void
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status_job_callback(struct job *job)
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{
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@@ -523,12 +520,14 @@ status_job_callback(struct job *job)
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xfree(buf);
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}
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/* Calculate winlink status line entry width. */
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size_t
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status_width(struct winlink *wl)
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{
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return (xsnprintf(NULL, 0, "%d:%s ", wl->idx, wl->window->name));
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}
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/* Return winlink status line entry and adjust gc as necessary. */
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char *
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status_print(struct session *s, struct winlink *wl, struct grid_cell *gc)
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{
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@@ -577,6 +576,7 @@ status_print(struct session *s, struct winlink *wl, struct grid_cell *gc)
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return (text);
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}
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/* Set a status line message. */
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void printflike2
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status_message_set(struct client *c, const char *fmt, ...)
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{
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@@ -621,6 +621,7 @@ status_message_set(struct client *c, const char *fmt, ...)
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c->flags |= CLIENT_STATUS;
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}
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/* Clear status line message. */
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void
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status_message_clear(struct client *c)
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{
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@@ -636,6 +637,7 @@ status_message_clear(struct client *c)
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screen_reinit(&c->status);
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}
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/* Clear status line message after timer expires. */
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void
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status_message_callback(unused int fd, unused short event, void *data)
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{
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@@ -685,6 +687,7 @@ status_message_redraw(struct client *c)
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return (1);
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}
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/* Enable status line prompt. */
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void
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status_prompt_set(struct client *c, const char *msg,
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int (*callbackfn)(void *, const char *), void (*freefn)(void *),
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@@ -718,6 +721,7 @@ status_prompt_set(struct client *c, const char *msg,
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c->flags |= CLIENT_STATUS;
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}
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/* Remove status line prompt. */
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void
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status_prompt_clear(struct client *c)
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{
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@@ -739,6 +743,7 @@ status_prompt_clear(struct client *c)
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screen_reinit(&c->status);
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}
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/* Update status line prompt with a new prompt string. */
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void
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status_prompt_update(struct client *c, const char *msg)
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{
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