cmd-show-buffer.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
   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
  21 #include <vis.h>
  22
  23 #include "tmux.h"
  24
  25 /*
  26  * Show a session paste buffer.
  27  */
  28
  29 int     cmd_show_buffer_exec(struct cmd *, struct cmd_ctx *);
  30
  31 const struct cmd_entry cmd_show_buffer_entry = {
  32         "show-buffer", "showb",
  33         "b:", 0, 0,
  34         CMD_BUFFER_USAGE,
  35         0,
  36         NULL,
  37         NULL,
  38         cmd_show_buffer_exec
  39 };
  40
  41 int
  42 cmd_show_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
  43 {
  44         struct args             *args = self->args;
  45         struct session          *s;
  46         struct paste_buffer     *pb;
  47         int                      buffer;
  48         char                    *in, *buf, *ptr, *cause;
  49         size_t                   size, len;
  50         u_int                    width;
  51
  52         if ((s = cmd_find_session(ctx, NULL)) == NULL)
  53                 return (-1);
  54
  55         if (!args_has(args, 'b')) {
  56                 if ((pb = paste_get_top(&global_buffers)) == NULL) {
  57                         ctx->error(ctx, "no buffers");
  58                         return (-1);
  59                 }
  60         } else {
  61                 buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
  62                 if (cause != NULL) {
  63                         ctx->error(ctx, "buffer %s", cause);
  64                         xfree(cause);
  65                         return (-1);
  66                 }
  67
  68                 pb = paste_get_index(&global_buffers, buffer);
  69                 if (pb == NULL) {
  70                         ctx->error(ctx, "no buffer %d", buffer);
  71                         return (-1);
  72                 }
  73         }
  74
  75         size = pb->size;
  76         if (size > SIZE_MAX / 4 - 1)
  77                 size = SIZE_MAX / 4 - 1;
  78         in = xmalloc(size * 4 + 1);
  79         strvisx(in, pb->data, size, VIS_OCTAL|VIS_TAB);
  80
  81         width = s->sx;
  82         if (ctx->cmdclient != NULL)
  83                 width = ctx->cmdclient->tty.sx;
  84
  85         buf = xmalloc(width + 1);
  86         len = 0;
  87
  88         ptr = in;
  89         do {
  90                 buf[len++] = *ptr++;
  91
  92                 if (len == width || buf[len - 1] == '\n') {
  93                         if (buf[len - 1] == '\n')
  94                                 len--;
  95                         buf[len] = '\0';
  96
  97                         ctx->print(ctx, "%s", buf);
  98                         len = 0;
  99                 }
 100         } while (*ptr != '\0');
 101
 102         if (len != 0) {
 103                 buf[len] = '\0';
 104                 ctx->print(ctx, "%s", buf);
 105         }
 106         xfree(buf);
 107
 108         xfree(in);
 109
 110         return (0);
 111 }