Annotation of src/usr.bin/tmux/paste.c, Revision 1.40
1.40 ! nicm 1: /* $OpenBSD: paste.c,v 1.39 2017/01/24 13:28:33 nicm Exp $ */
1.1 nicm 2:
3: /*
1.34 nicm 4: * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
1.12 nicm 21: #include <stdlib.h>
1.1 nicm 22: #include <string.h>
1.38 nicm 23: #include <time.h>
1.9 nicm 24: #include <vis.h>
1.1 nicm 25:
26: #include "tmux.h"
27:
1.7 nicm 28: /*
1.19 nicm 29: * Set of paste buffers. Note that paste buffer data is not necessarily a C
1.7 nicm 30: * string!
31: */
1.1 nicm 32:
1.28 nicm 33: struct paste_buffer {
34: char *data;
35: size_t size;
36:
37: char *name;
1.35 nicm 38: time_t created;
1.28 nicm 39: int automatic;
40: u_int order;
41:
42: RB_ENTRY(paste_buffer) name_entry;
43: RB_ENTRY(paste_buffer) time_entry;
44: };
45:
1.36 nicm 46: static u_int paste_next_index;
47: static u_int paste_next_order;
48: static u_int paste_num_automatic;
1.37 nicm 49: static RB_HEAD(paste_name_tree, paste_buffer) paste_by_name;
50: static RB_HEAD(paste_time_tree, paste_buffer) paste_by_time;
1.19 nicm 51:
1.36 nicm 52: static int paste_cmp_names(const struct paste_buffer *,
53: const struct paste_buffer *);
54: RB_GENERATE_STATIC(paste_name_tree, paste_buffer, name_entry, paste_cmp_names);
55:
56: static int paste_cmp_times(const struct paste_buffer *,
57: const struct paste_buffer *);
58: RB_GENERATE_STATIC(paste_time_tree, paste_buffer, time_entry, paste_cmp_times);
1.18 nicm 59:
1.36 nicm 60: static int
1.19 nicm 61: paste_cmp_names(const struct paste_buffer *a, const struct paste_buffer *b)
1.1 nicm 62: {
1.19 nicm 63: return (strcmp(a->name, b->name));
64: }
1.1 nicm 65:
1.36 nicm 66: static int
1.19 nicm 67: paste_cmp_times(const struct paste_buffer *a, const struct paste_buffer *b)
68: {
69: if (a->order > b->order)
70: return (-1);
71: if (a->order < b->order)
72: return (1);
73: return (0);
1.1 nicm 74: }
75:
1.28 nicm 76: /* Get paste buffer name. */
77: const char *
78: paste_buffer_name(struct paste_buffer *pb)
79: {
80: return (pb->name);
81: }
82:
1.35 nicm 83: /* Get paste buffer order. */
84: u_int
85: paste_buffer_order(struct paste_buffer *pb)
86: {
87: return (pb->order);
88: }
89:
90: /* Get paste buffer created. */
91: time_t
92: paste_buffer_created(struct paste_buffer *pb)
93: {
94: return (pb->created);
95: }
96:
1.28 nicm 97: /* Get paste buffer data. */
98: const char *
99: paste_buffer_data(struct paste_buffer *pb, size_t *size)
100: {
101: if (size != NULL)
102: *size = pb->size;
103: return (pb->data);
104: }
105:
1.35 nicm 106: /* Walk paste buffers by time. */
1.1 nicm 107: struct paste_buffer *
1.19 nicm 108: paste_walk(struct paste_buffer *pb)
1.1 nicm 109: {
1.19 nicm 110: if (pb == NULL)
111: return (RB_MIN(paste_time_tree, &paste_by_time));
112: return (RB_NEXT(paste_time_tree, &paste_by_time, pb));
1.1 nicm 113: }
114:
1.21 nicm 115: /* Get the most recent automatic buffer. */
1.1 nicm 116: struct paste_buffer *
1.28 nicm 117: paste_get_top(const char **name)
1.1 nicm 118: {
1.19 nicm 119: struct paste_buffer *pb;
120:
121: pb = RB_MIN(paste_time_tree, &paste_by_time);
122: if (pb == NULL)
1.1 nicm 123: return (NULL);
1.28 nicm 124: if (name != NULL)
125: *name = pb->name;
1.19 nicm 126: return (pb);
1.1 nicm 127: }
128:
1.19 nicm 129: /* Get a paste buffer by name. */
130: struct paste_buffer *
131: paste_get_name(const char *name)
132: {
133: struct paste_buffer pbfind;
1.1 nicm 134:
1.19 nicm 135: if (name == NULL || *name == '\0')
136: return (NULL);
1.1 nicm 137:
1.23 nicm 138: pbfind.name = (char *)name;
1.19 nicm 139: return (RB_FIND(paste_name_tree, &paste_by_name, &pbfind));
1.1 nicm 140: }
141:
1.30 nicm 142: /* Free a paste buffer. */
143: void
144: paste_free(struct paste_buffer *pb)
1.1 nicm 145: {
1.19 nicm 146: RB_REMOVE(paste_name_tree, &paste_by_name, pb);
147: RB_REMOVE(paste_time_tree, &paste_by_time, pb);
148: if (pb->automatic)
149: paste_num_automatic--;
1.1 nicm 150:
1.12 nicm 151: free(pb->data);
1.19 nicm 152: free(pb->name);
1.12 nicm 153: free(pb);
1.1 nicm 154: }
155:
1.8 nicm 156: /*
1.19 nicm 157: * Add an automatic buffer, freeing the oldest automatic item if at limit. Note
1.7 nicm 158: * that the caller is responsible for allocating data.
159: */
1.1 nicm 160: void
1.40 ! nicm 161: paste_add(const char *prefix, char *data, size_t size)
1.1 nicm 162: {
1.19 nicm 163: struct paste_buffer *pb, *pb1;
164: u_int limit;
1.2 nicm 165:
1.40 ! nicm 166: if (prefix == NULL)
! 167: prefix = "buffer";
! 168:
1.39 nicm 169: if (size == 0) {
170: free(data);
1.2 nicm 171: return;
1.39 nicm 172: }
1.1 nicm 173:
1.32 nicm 174: limit = options_get_number(global_options, "buffer-limit");
1.19 nicm 175: RB_FOREACH_REVERSE_SAFE(pb, paste_time_tree, &paste_by_time, pb1) {
176: if (paste_num_automatic < limit)
177: break;
178: if (pb->automatic)
1.30 nicm 179: paste_free(pb);
1.3 nicm 180: }
1.1 nicm 181:
182: pb = xmalloc(sizeof *pb);
1.19 nicm 183:
184: pb->name = NULL;
185: do {
186: free(pb->name);
1.40 ! nicm 187: xasprintf(&pb->name, "%s%u", prefix, paste_next_index);
1.19 nicm 188: paste_next_index++;
189: } while (paste_get_name(pb->name) != NULL);
1.1 nicm 190:
191: pb->data = data;
1.4 nicm 192: pb->size = size;
1.19 nicm 193:
194: pb->automatic = 1;
195: paste_num_automatic++;
196:
1.35 nicm 197: pb->created = time(NULL);
198:
1.19 nicm 199: pb->order = paste_next_order++;
200: RB_INSERT(paste_name_tree, &paste_by_name, pb);
201: RB_INSERT(paste_time_tree, &paste_by_time, pb);
1.1 nicm 202: }
203:
1.19 nicm 204: /* Rename a paste buffer. */
205: int
206: paste_rename(const char *oldname, const char *newname, char **cause)
207: {
1.20 nicm 208: struct paste_buffer *pb, *pb_new;
1.19 nicm 209:
210: if (cause != NULL)
211: *cause = NULL;
212:
213: if (oldname == NULL || *oldname == '\0') {
214: if (cause != NULL)
215: *cause = xstrdup("no buffer");
216: return (-1);
217: }
218: if (newname == NULL || *newname == '\0') {
219: if (cause != NULL)
220: *cause = xstrdup("new name is empty");
221: return (-1);
222: }
223:
224: pb = paste_get_name(oldname);
225: if (pb == NULL) {
226: if (cause != NULL)
1.20 nicm 227: xasprintf(cause, "no buffer %s", oldname);
228: return (-1);
229: }
230:
231: pb_new = paste_get_name(newname);
232: if (pb_new != NULL) {
233: if (cause != NULL)
234: xasprintf(cause, "buffer %s already exists", newname);
1.19 nicm 235: return (-1);
236: }
237:
238: RB_REMOVE(paste_name_tree, &paste_by_name, pb);
239:
240: free(pb->name);
241: pb->name = xstrdup(newname);
242:
243: if (pb->automatic)
244: paste_num_automatic--;
245: pb->automatic = 0;
246:
247: RB_INSERT(paste_name_tree, &paste_by_name, pb);
248:
249: return (0);
250: }
1.7 nicm 251:
1.8 nicm 252: /*
1.19 nicm 253: * Add or replace an item in the store. Note that the caller is responsible for
1.7 nicm 254: * allocating data.
255: */
1.1 nicm 256: int
1.19 nicm 257: paste_set(char *data, size_t size, const char *name, char **cause)
1.1 nicm 258: {
1.30 nicm 259: struct paste_buffer *pb, *old;
1.7 nicm 260:
1.19 nicm 261: if (cause != NULL)
262: *cause = NULL;
263:
1.15 nicm 264: if (size == 0) {
265: free(data);
1.7 nicm 266: return (0);
1.15 nicm 267: }
1.19 nicm 268: if (name == NULL) {
1.40 ! nicm 269: paste_add(NULL, data, size);
1.19 nicm 270: return (0);
271: }
1.1 nicm 272:
1.19 nicm 273: if (*name == '\0') {
274: if (cause != NULL)
275: *cause = xstrdup("empty buffer name");
1.1 nicm 276: return (-1);
1.19 nicm 277: }
278:
279: pb = xmalloc(sizeof *pb);
1.1 nicm 280:
1.19 nicm 281: pb->name = xstrdup(name);
1.1 nicm 282:
283: pb->data = data;
1.4 nicm 284: pb->size = size;
1.19 nicm 285:
286: pb->automatic = 0;
287: pb->order = paste_next_order++;
1.35 nicm 288:
289: pb->created = time(NULL);
1.27 nicm 290:
1.30 nicm 291: if ((old = paste_get_name(name)) != NULL)
292: paste_free(old);
1.19 nicm 293:
294: RB_INSERT(paste_name_tree, &paste_by_name, pb);
295: RB_INSERT(paste_time_tree, &paste_by_time, pb);
1.1 nicm 296:
297: return (0);
1.9 nicm 298: }
299:
1.17 nicm 300: /* Convert start of buffer into a nice string. */
1.9 nicm 301: char *
1.33 nicm 302: paste_make_sample(struct paste_buffer *pb)
1.9 nicm 303: {
1.17 nicm 304: char *buf;
305: size_t len, used;
306: const int flags = VIS_OCTAL|VIS_TAB|VIS_NL;
307: const size_t width = 200;
1.9 nicm 308:
309: len = pb->size;
310: if (len > width)
311: len = width;
1.25 nicm 312: buf = xreallocarray(NULL, len, 4 + 4);
1.9 nicm 313:
1.33 nicm 314: used = utf8_strvis(buf, pb->data, len, flags);
1.13 nicm 315: if (pb->size > width || used > width)
1.17 nicm 316: strlcpy(buf + width, "...", 4);
1.9 nicm 317: return (buf);
1.1 nicm 318: }
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