Goffredo Baroncelli
2014-Feb-13 19:19 UTC
[PATCH 3/8] Add helpers functions to handle the printing of data in tabular format.
This patch adds some functions to manage the printing of the data in
tabular format.
The function
struct string_table *table_create(int columns, int rows)
creates an (empty) table.
The functions
char *table_printf(struct string_table *tab, int column,
int row, char *fmt, ...)
char *table_vprintf(struct string_table *tab, int column,
int row, char *fmt, va_list ap)
populate the table with text. To align the text to the left, the text
shall be prefixed with '<', otherwise the text shall be prefixed by a
'>'. If the first character is a '=', the the text is replace
by a
sequence of '=' to fill the column width.
The function
void table_free(struct string_table *)
frees all the data associated to the table.
The function
void table_dump(struct string_table *tab)
prints the table on stdout.
Signed-off-by: Goffredo Baroncelli <kreijack@inwind.it>
---
Makefile | 2 +-
string_table.c | 156 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
string_table.h | 36 +++++++++++++
3 files changed, 193 insertions(+), 1 deletion(-)
create mode 100644 string_table.c
create mode 100644 string_table.h
diff --git a/Makefile b/Makefile
index db470b6..5738379 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ CFLAGS = -g -O1 -fno-strict-aliasing
objects = ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
root-tree.o dir-item.o file-item.o inode-item.o inode-map.o \
extent-cache.o extent_io.o volumes.o utils.o repair.o \
- qgroup.o raid6.o free-space-cache.o list_sort.o
+ qgroup.o raid6.o free-space-cache.o list_sort.o string_table.o
cmds_objects = cmds-subvolume.o cmds-filesystem.o cmds-device.o cmds-scrub.o \
cmds-inspect.o cmds-balance.o cmds-send.o cmds-receive.o \
cmds-quota.o cmds-qgroup.o cmds-replace.o cmds-check.o \
diff --git a/string_table.c b/string_table.c
new file mode 100644
index 0000000..016356c
--- /dev/null
+++ b/string_table.c
@@ -0,0 +1,156 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "string_table.h"
+
+/*
+ * This function create an array of char * which will represent a table
+ */
+struct string_table *table_create(int columns, int rows)
+{
+ struct string_table *p;
+ int size;
+
+ size = sizeof( struct string_table ) +
+ rows * columns* sizeof(char *);
+ p = calloc(1, size);
+
+ if (!p) return NULL;
+
+ p->ncols = columns;
+ p->nrows = rows;
+
+ return p;
+}
+
+/*
+ * This function is like a vprintf, but store the results in a cell of
+ * the table.
+ * If fmt starts with '<', the text is left aligned; if fmt starts
with
+ * '>' the text is right aligned. If fmt is equal to '=' the
text will
+ * be replaced by a '=====' dimensioned on the basis of the column
width
+ */
+char *table_vprintf(struct string_table *tab, int column, int row,
+ char *fmt, va_list ap)
+{
+ int idx = tab->ncols*row+column;
+ char *msg = calloc(100, sizeof(char));
+
+ if (!msg)
+ return NULL;
+
+ if (tab->cells[idx])
+ free(tab->cells[idx]);
+ tab->cells[idx] = msg;
+ vsnprintf(msg, 99, fmt, ap);
+
+ return msg;
+}
+
+
+/*
+ * This function is like a printf, but store the results in a cell of
+ * the table.
+ */
+char *table_printf(struct string_table *tab, int column, int row,
+ char *fmt, ...)
+{
+ va_list ap;
+ char *ret;
+
+ va_start(ap, fmt);
+ ret = table_vprintf(tab, column, row, fmt, ap);
+ va_end(ap);
+
+ return ret;
+}
+
+/*
+ * This function dumps the table. Every "=" string will be replaced
by
+ * a "=======" length as the column
+ */
+void table_dump(struct string_table *tab)
+{
+ int sizes[tab->ncols];
+ int i, j;
+
+ for (i = 0 ; i < tab->ncols ; i++) {
+ sizes[i] = 0;
+ for (j = 0 ; j < tab->nrows ; j++) {
+ int idx = i + j*tab->ncols;
+ int s;
+
+ if (!tab->cells[idx])
+ continue;
+
+ s = strlen(tab->cells[idx]) - 1;
+ if (s < 1 || tab->cells[idx][0] == '=')
+ continue;
+
+ if (s > sizes[i])
+ sizes[i] = s;
+ }
+ }
+
+
+ for (j = 0 ; j < tab->nrows ; j++) {
+ for (i = 0 ; i < tab->ncols ; i++) {
+
+ int idx = i + j*tab->ncols;
+ char *s = tab->cells[idx];
+
+ if (!s|| !strlen(s)) {
+ printf("%*s", sizes[i], "");
+ } else if (s && s[0] == '=') {
+ int k = sizes[i];
+ while(k--)
+ putchar('=');
+ } else {
+ printf("%*s",
+ s[0] == '<' ? -sizes[i] : sizes[i],
+ s+1);
+ }
+ if (i != (tab->ncols - 1))
+ putchar(' ');
+ }
+ putchar('\n');
+ }
+
+}
+
+/*
+ * Deallocate a tabular and all its content
+ */
+
+void table_free(struct string_table *tab)
+{
+
+ int i, count;
+
+ count = tab->ncols * tab->nrows;
+
+ for (i=0 ; i < count ; i++)
+ if (tab->cells[i])
+ free(tab->cells[i]);
+
+ free(tab);
+
+}
diff --git a/string_table.h b/string_table.h
new file mode 100644
index 0000000..83c4425
--- /dev/null
+++ b/string_table.h
@@ -0,0 +1,36 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef STRING_TABLE_H
+#define STRING_TABLE_H
+
+struct string_table {
+
+ int ncols, nrows;
+ char *cells[];
+
+};
+
+
+struct string_table *table_create(int columns, int rows);
+char *table_printf(struct string_table *tab, int column, int row,
+ char *fmt, ...);
+char *table_vprintf(struct string_table *tab, int column, int row,
+ char *fmt, va_list ap);
+void table_dump(struct string_table *tab);
+void table_free(struct string_table *);
+
+#endif
--
1.8.5.3
--
gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it>
Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5
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