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 <stdlib.h>
  22 #include <vis.h>
  23
  24 #include "tmux.h"
  25
  26 /*
  27  * Show a paste buffer.
  28  */
  29
  30 enum cmd_retval  cmd_show_buffer_exec(struct cmd *, struct cmd_ctx *);
  31
  32 const struct cmd_entry cmd_show_buffer_entry = {
  33         "show-buffer", "showb",
  34         "b:", 0, 0,
  35         CMD_BUFFER_USAGE,
  36         0,
  37         NULL,
  38         NULL,
  39         cmd_show_buffer_exec
  40 };
  41
  42 enum cmd_retval
  43 cmd_show_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
  44 {
  45         struct args             *args = self->args;
  46         struct session          *s;
  47         struct paste_buffer     *pb;
  48         int                      buffer;
  49         char                    *in, *buf, *ptr, *cause;
  50         size_t                   size, len;
  51         u_int                    width;
  52
  53         if ((s = cmd_find_session(ctx, NULL, 0)) == NULL)
  54                 return (CMD_RETURN_ERROR);
  55
  56         if (!args_has(args, 'b')) {
  57                 if ((pb = paste_get_top(&global_buffers)) == NULL) {
  58                         ctx->error(ctx, "no buffers");
  59                         return (CMD_RETURN_ERROR);
  60                 }
  61         } else {
  62                 buffer = args_strtonum(args, 'b', 0, INT_MAX, &cause);
  63                 if (cause != NULL) {
  64                         ctx->error(ctx, "buffer %s", cause);
  65                         free(cause);
  66                         return (CMD_RETURN_ERROR);
  67                 }
  68
  69                 pb = paste_get_index(&global_buffers, buffer);
  70                 if (pb == NULL) {
  71                         ctx->error(ctx, "no buffer %d", buffer);
  72                         return (CMD_RETURN_ERROR);
  73                 }
  74         }
  75
  76         size = pb->size;
  77         if (size > SIZE_MAX / 4 - 1)
  78                 size = SIZE_MAX / 4 - 1;
  79         in = xmalloc(size * 4 + 1);
  80         strvisx(in, pb->data, size, VIS_OCTAL|VIS_TAB);
  81
  82         width = s->sx;
  83         if (ctx->cmdclient != NULL)
  84                 width = ctx->cmdclient->tty.sx;
  85
  86         buf = xmalloc(width + 1);
  87         len = 0;
  88
  89         ptr = in;
  90         do {
  91                 buf[len++] = *ptr++;
  92
  93                 if (len == width || buf[len - 1] == '\n') {
  94                         if (buf[len - 1] == '\n')
  95                                 len--;
  96                         buf[len] = '\0';
  97
  98                         ctx->print(ctx, "%s", buf);
  99                         len = 0;
 100                 }
 101         } while (*ptr != '\0');
 102
 103         if (len != 0) {
 104                 buf[len] = '\0';
 105                 ctx->print(ctx, "%s", buf);
 106         }
 107         free(buf);
 108
 109         free(in);
 110
 111         return (CMD_RETURN_NORMAL);
 112 }