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 <kreij...@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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