mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git
synced 2024-11-16 00:34:32 +08:00
152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include "string-table.h"
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/*
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* This function create an array of char * which will represent a table
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*/
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struct string_table *table_create(int columns, int rows)
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{
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struct string_table *tab;
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int size;
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size = sizeof(struct string_table) + rows * columns * sizeof(char*);
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tab = calloc(1, size);
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if (!tab)
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return NULL;
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tab->ncols = columns;
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tab->nrows = rows;
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return tab;
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}
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/*
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* This function is like a vprintf, but store the results in a cell of
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* the table.
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* If fmt starts with '<', the text is left aligned; if fmt starts with
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* '>' the text is right aligned. If fmt is equal to '=' the text will
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* be replaced by a '=====' dimensioned on the basis of the column width
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*/
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char *table_vprintf(struct string_table *tab, int column, int row,
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const char *fmt, va_list ap)
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{
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int idx = tab->ncols * row + column;
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char *msg = calloc(100, 1);
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if (!msg)
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return NULL;
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if (tab->cells[idx])
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free(tab->cells[idx]);
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tab->cells[idx] = msg;
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vsnprintf(msg, 99, fmt, ap);
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return msg;
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}
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/*
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* This function is like a printf, but store the results in a cell of
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* the table.
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*/
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__attribute__ ((format (printf, 4, 5)))
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char *table_printf(struct string_table *tab, int column, int row,
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const char *fmt, ...)
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{
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va_list ap;
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char *ret;
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va_start(ap, fmt);
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ret = table_vprintf(tab, column, row, fmt, ap);
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va_end(ap);
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return ret;
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}
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/*
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* This function dumps the table. Every "=" string will be replaced by
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* a "=======" length as the column
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*/
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void table_dump(struct string_table *tab)
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{
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int sizes[tab->ncols];
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int i, j;
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for (i = 0; i < tab->ncols; i++) {
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sizes[i] = 0;
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for (j = 0; j < tab->nrows; j++) {
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int idx = i + j * tab->ncols;
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int len;
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if (!tab->cells[idx])
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continue;
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len = strlen(tab->cells[idx]) - 1;
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if (len == 0 || tab->cells[idx][0] == '*')
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continue;
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if (len > sizes[i])
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sizes[i] = len;
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}
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}
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for (j = 0; j < tab->nrows; j++) {
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for (i = 0; i < tab->ncols; i++) {
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int idx = i + j * tab->ncols;
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char *cell = tab->cells[idx];
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if (!cell || !strlen(cell)) {
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printf("%*s", sizes[i], "");
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} else if (cell && cell[0] == '*' && cell[1]) {
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int k = sizes[i];
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while (k--)
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putchar(cell[1]);
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} else {
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printf("%*s",
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cell[0] == '<' ? -sizes[i] : sizes[i],
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cell + 1);
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}
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if (i != (tab->ncols - 1))
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putchar(' ');
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}
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putchar('\n');
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}
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}
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/*
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* Deallocate a table and all of its content
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*/
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void table_free(struct string_table *tab)
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{
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int i, count;
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count = tab->ncols * tab->nrows;
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for (i = 0; i < count; i++)
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if (tab->cells[i])
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free(tab->cells[i]);
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free(tab);
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}
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