vppinfra: move format_table from perfmon

This code seems really usefull for reuse in
other plugins, for pretty table formatting

Type: feature

Change-Id: Ib5784a0dfc81b7d5a5d1f5ccdd02072e460a50fb
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>

1 files changed, 273 insertions, 0 deletions

diff --git a/src/vppinfra/format_table.c b/src/vppinfra/format_table.c
new file mode 100644
index 00000000000..5d83f7a6abe
--- /dev/null
+++ b/src/vppinfra/format_table.c
@@ -0,0 +1,273 @@
+/*
+  Copyright (c) 2020 Damjan Marion
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <vppinfra/format.h>
+#include <vppinfra/format_table.h>
+
+static table_text_attr_t default_title = {
+  .flags = TTAF_FG_COLOR_SET | TTAF_BOLD,
+  .fg_color = TTAC_YELLOW,
+  .align = TTAA_CENTER,
+};
+
+static table_text_attr_t default_body = {
+  .align = TTAA_RIGHT,
+};
+
+static table_text_attr_t default_header_col = {
+  .flags = TTAF_FG_COLOR_SET,
+  .fg_color = TTAC_YELLOW,
+  .align = TTAA_CENTER,
+};
+
+static table_text_attr_t default_header_row = {
+  .flags = TTAF_FG_COLOR_SET | TTAF_BOLD,
+  .fg_color = TTAC_GREEN,
+  .align = TTAA_LEFT,
+};
+
+u8 *
+format_text_cell (table_t *t, u8 *s, table_cell_t *c, table_text_attr_t *def,
+		  int size)
+{
+  table_text_attr_t _a = {}, *a = &_a;
+
+  if (a == 0)
+    return format (s, t->no_ansi ? "" : "\x1b[0m");
+
+  clib_memcpy (a, def, sizeof (table_text_attr_t));
+
+  if (t->no_ansi == 0)
+    {
+      int *codes = 0;
+      if (c->attr.flags & TTAF_FG_COLOR_SET)
+	{
+	  a->fg_color = c->attr.fg_color;
+	  a->flags |= TTAF_FG_COLOR_SET;
+	}
+
+      if (c->attr.flags & TTAF_BG_COLOR_SET)
+	{
+	  a->bg_color = c->attr.bg_color;
+	  a->flags |= TTAF_BG_COLOR_SET;
+	}
+
+      if (a->flags & TTAF_RESET)
+	vec_add1 (codes, 0);
+
+      if (a->flags & TTAF_BOLD)
+	vec_add1 (codes, 1);
+
+      if (a->flags & TTAF_DIM)
+	vec_add1 (codes, 2);
+
+      if (a->flags & TTAF_UNDERLINE)
+	vec_add1 (codes, 4);
+
+      if (a->flags & TTAF_FG_COLOR_SET)
+	vec_add1 (codes,
+		  (a->flags & TTAF_FG_COLOR_BRIGHT ? 90 : 30) + a->fg_color);
+
+      if (a->flags & TTAF_BG_COLOR_SET)
+	vec_add1 (codes,
+		  (a->flags & TTAF_BG_COLOR_BRIGHT ? 100 : 40) + a->bg_color);
+
+      if (codes)
+	{
+	  s = format (s, "\x1b[");
+	  for (int i = 0; i < vec_len (codes); i++)
+	    s = format (s, "%s%u", i ? ";" : "", codes[i]);
+	  s = format (s, "m");
+	  vec_free (codes);
+	}
+    }
+
+  u8 *fmt = 0;
+  table_text_attr_align_t align = c->attr.align;
+  if (align == TTAA_DEFAULT)
+    align = a->align;
+  if (align == TTAA_LEFT)
+    fmt = format (fmt, "%%-%uv%c", size, 0);
+  else if (align == TTAA_CENTER)
+    fmt = format (fmt, "%%=%uv%c", size, 0);
+  else
+    fmt = format (fmt, "%%%uv%c", size, 0);
+  s = format (s, (char *) fmt, c->text);
+  vec_free (fmt);
+  return format (s, t->no_ansi ? "" : "\x1b[0m");
+}
+
+u8 *
+format_table (u8 *s, va_list *args)
+{
+  table_t *t = va_arg (*args, table_t *);
+  table_cell_t title_cell = { .text = t->title };
+  int table_width = 0;
+  for (int i = 0; i < vec_len (t->row_sizes); i++)
+    table_width += t->row_sizes[i];
+
+  s = format_text_cell (t, s, &title_cell, &default_title, table_width);
+  s = format (s, "\n");
+
+  for (int c = 0; c < vec_len (t->cells); c++)
+    {
+      table_text_attr_t *col_default;
+
+      if (c < t->n_header_cols)
+	col_default = &default_header_col;
+      else
+	col_default = &default_body;
+
+      for (int r = 0; r < vec_len (t->cells[c]); r++)
+	{
+	  table_text_attr_t *row_default = col_default;
+	  if (r)
+	    s = format (s, " ");
+	  if (r < t->n_header_rows && c >= t->n_header_cols)
+	    row_default = &default_header_row;
+	  s = format_text_cell (t, s, &t->cells[c][r], row_default,
+				t->row_sizes[r]);
+	}
+      s = format (s, "\n");
+    }
+
+  return s;
+}
+
+void
+table_format_title (table_t *t, char *fmt, ...)
+{
+  va_list va;
+
+  va_start (va, fmt);
+  t->title = va_format (t->title, fmt, &va);
+  va_end (va);
+}
+
+static table_cell_t *
+table_get_cell (table_t *t, int c, int r)
+{
+  c += t->n_header_cols;
+  r += t->n_header_rows;
+
+  /* grow table if needed */
+  vec_validate (t->cells, c);
+  for (int i = 0; i < vec_len (t->cells); i++)
+    vec_validate (t->cells[i], r);
+  return &t->cells[c][r];
+}
+
+void
+table_format_cell (table_t *t, int c, int r, char *fmt, ...)
+{
+  table_cell_t *cell = table_get_cell (t, c, r);
+  va_list va;
+
+  c += t->n_header_cols;
+  r += t->n_header_rows;
+
+  va_start (va, fmt);
+  cell->text = va_format (t->cells[c][r].text, fmt, &va);
+  va_end (va);
+
+  vec_validate (t->row_sizes, r);
+  t->row_sizes[r] = clib_max (t->row_sizes[r], vec_len (t->cells[c][r].text));
+}
+
+void
+table_set_cell_align (table_t *t, int c, int r, table_text_attr_align_t a)
+{
+  table_cell_t *cell = table_get_cell (t, c, r);
+  cell->attr.align = a;
+}
+
+void
+table_set_cell_fg_color (table_t *t, int c, int r, table_text_attr_color_t v)
+{
+  table_cell_t *cell = table_get_cell (t, c, r);
+  cell->attr.fg_color = v;
+  cell->attr.flags |= TTAF_FG_COLOR_SET;
+}
+
+void
+table_set_cell_bg_color (table_t *t, int c, int r, table_text_attr_color_t v)
+{
+  table_cell_t *cell = table_get_cell (t, c, r);
+  cell->attr.bg_color = v;
+  cell->attr.flags |= TTAF_BG_COLOR_SET;
+}
+
+void
+table_free (table_t *t)
+{
+  for (int c = 0; c < vec_len (t->cells); c++)
+    {
+      for (int r = 0; r < vec_len (t->cells[c]); r++)
+	vec_free (t->cells[c][r].text);
+      vec_free (t->cells[c]);
+    }
+  vec_free (t->cells);
+  vec_free (t->row_sizes);
+  vec_free (t->title);
+  clib_memset (t, 0, sizeof (table_t));
+}
+
+void
+table_add_header_col (table_t *t, int n_strings, ...)
+{
+  va_list arg;
+  int r, c = t->n_header_cols++;
+  int n_rows;
+
+  vec_insert (t->cells, 1, c);
+  n_rows = clib_max (n_strings, 1);
+  n_rows = clib_max (vec_len (t->row_sizes), n_rows);
+  vec_validate (t->cells[c], n_rows - 1);
+
+  va_start (arg, n_strings);
+  for (r = 0; r < n_rows; r++)
+    {
+      if (n_strings-- > 0)
+	table_format_cell (t, -1, r - t->n_header_rows, "%s",
+			   va_arg (arg, char *));
+    }
+  va_end (arg);
+}
+
+void
+table_add_header_row (table_t *t, int n_strings, ...)
+{
+  va_list arg;
+  int c, r = t->n_header_rows++;
+
+  vec_validate (t->cells, n_strings + t->n_header_cols - 1);
+
+  va_start (arg, n_strings);
+  for (c = t->n_header_cols; c < vec_len (t->cells); c++)
+    {
+      vec_insert (t->cells[c + t->n_header_cols], 1, r);
+      if (n_strings-- > 0)
+	table_format_cell (t, c, -1, "%s", va_arg (arg, char *));
+    }
+  va_end (arg);
+}