/*
* column.c - functions for table handling at the column level
*
* Copyright (C) 2014 Ondrej Oprala <ooprala@redhat.com>
* Copyright (C) 2014 Karel Zak <kzak@redhat.com>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
/**
* SECTION: column
* @title: Column
* @short_description: defines output columns formats, headers, etc.
*
* An API to access and modify per-column data and information.
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include "smartcolsP.h"
/**
* scols_new_column:
*
* Allocates space for a new column.
*
* Returns: a pointer to a new struct libscols_cell instance, NULL in case of an ENOMEM error.
*/
struct libscols_column *scols_new_column(void)
{
struct libscols_column *cl;
cl = calloc(1, sizeof(*cl));
if (!cl)
return NULL;
DBG(COL, ul_debugobj(cl, "alloc"));
cl->refcount = 1;
INIT_LIST_HEAD(&cl->cl_columns);
return cl;
}
/**
* scols_ref_column:
* @cl: a pointer to a struct libscols_column instance
*
* Increases the refcount of @cl.
*/
void scols_ref_column(struct libscols_column *cl)
{
if (cl)
cl->refcount++;
}
/**
* scols_unref_column:
* @cl: a pointer to a struct libscols_column instance
*
* Decreases the refcount of @cl. When the count falls to zero, the instance
* is automatically deallocated.
*/
void scols_unref_column(struct libscols_column *cl)
{
if (cl && --cl->refcount <= 0) {
DBG(COL, ul_debugobj(cl, "dealloc"));
list_del(&cl->cl_columns);
scols_reset_cell(&cl->header);
free(cl->color);
free(cl);
}
}
/**
* scols_copy_column:
* @cl: a pointer to a struct libscols_column instance
*
* Creates a new column and copies @cl's data over to it.
*
* Returns: a pointer to a new struct libscols_column instance.
*/
struct libscols_column *scols_copy_column(const struct libscols_column *cl)
{
struct libscols_column *ret;
if (!cl)
return NULL;
ret = scols_new_column();
if (!ret)
return NULL;
DBG(COL, ul_debugobj((void *) cl, "copy to %p", ret));
if (scols_column_set_color(ret, cl->color))
goto err;
if (scols_cell_copy_content(&ret->header, &cl->header))
goto err;
ret->width = cl->width;
ret->width_min = cl->width_min;
ret->width_max = cl->width_max;
ret->width_avg = cl->width_avg;
ret->width_hint = cl->width_hint;
ret->flags = cl->flags;
ret->is_extreme = cl->is_extreme;
return ret;
err:
scols_unref_column(ret);
return NULL;
}
/**
* scols_column_set_whint:
* @cl: a pointer to a struct libscols_column instance
* @whint: a width hint
*
* Sets the width hint of column @cl to @whint.
*
* Returns: 0, a negative value in case of an error.
*/
int scols_column_set_whint(struct libscols_column *cl, double whint)
{
if (!cl)
return -EINVAL;
cl->width_hint = whint;
return 0;
}
/**
* scols_column_get_whint:
* @cl: a pointer to a struct libscols_column instance
*
* Returns: The width hint of column @cl, a negative value in case of an error.
*/
double scols_column_get_whint(struct libscols_column *cl)
{
assert(cl);
return cl ? cl->width_hint : -EINVAL;
}
/**
* scols_column_set_flags:
* @cl: a pointer to a struct libscols_column instance
* @flags: a flag mask
*
* Sets the flags of @cl to @flags.
*
* Returns: 0, a negative value in case of an error.
*/
int scols_column_set_flags(struct libscols_column *cl, int flags)
{
if (!cl)
return -EINVAL;
if (cl->table) {
if (!(cl->flags & SCOLS_FL_TREE) && (flags & SCOLS_FL_TREE))
cl->table->ntreecols++;
else if ((cl->flags & SCOLS_FL_TREE) && !(flags & SCOLS_FL_TREE))
cl->table->ntreecols--;
}
cl->flags = flags;
return 0;
}
/**
* scols_column_get_flags:
* @cl: a pointer to a struct libscols_column instance
*
* Returns: The flag mask of @cl, a negative value in case of an error.
*/
int scols_column_get_flags(struct libscols_column *cl)
{
assert(cl);
return cl ? cl->flags : -EINVAL;
}
/**
* scols_column_get_header:
* @cl: a pointer to a struct libscols_column instance
*
* Returns: A pointer to a struct libscols_cell instance, representing the
* header info of column @cl or NULL in case of an error.
*/
struct libscols_cell *scols_column_get_header(struct libscols_column *cl)
{
return cl ? &cl->header : NULL;
}
/**
* scols_column_set_color:
* @cl: a pointer to a struct libscols_column instance
* @color: color name or ESC sequence
*
* The default color for data cells and column header.
*
* If you want to set header specific color then use scols_column_get_header()
* and scols_cell_set_color().
*
* If you want to set data cell specific color the use scols_line_get_cell() +
* scols_cell_set_color().
*
* Returns: 0, a negative value in case of an error.
*/
int scols_column_set_color(struct libscols_column *cl, const char *color)
{
char *p = NULL;
if (!cl)
return -EINVAL;
if (color) {
if (isalpha(*color)) {
color = color_sequence_from_colorname(color);
if (!color)
return -EINVAL;
}
p = strdup(color);
if (!p)
return -ENOMEM;
}
free(cl->color);
cl->color = p;
return 0;
}
/**
* scols_column_get_color:
* @cl: a pointer to a struct libscols_column instance
*
* Returns: The current color setting of the column @cl.
*/
const char *scols_column_get_color(struct libscols_column *cl)
{
assert(cl);
return cl ? cl->color : NULL;
}
/**
* scols_column_set_cmpfunc:
* @cl: column
* @cmp: pointer to compare function
* @data: private data for cmp function
*
* Returns: 0, a negative value in case of an error.
*/
int scols_column_set_cmpfunc(struct libscols_column *cl,
int (*cmp)(struct libscols_cell *,
struct libscols_cell *,
void *),
void *data)
{
if (!cl)
return -EINVAL;
cl->cmpfunc = cmp;
cl->cmpfunc_data = data;
return 0;
}
/**
* scols_column_is_hidden:
* @cl: a pointer to a struct libscols_column instance
*
* Gets the value of @cl's flag hidden.
*
* Returns: hidden flag value, negative value in case of an error.
*/
int scols_column_is_hidden(struct libscols_column *cl)
{
if (!cl)
return -EINVAL;
return cl->flags & SCOLS_FL_HIDDEN;
}
/**
* scols_column_is_trunc:
* @cl: a pointer to a struct libscols_column instance
*
* Gets the value of @cl's flag trunc.
*
* Returns: trunc flag value, negative value in case of an error.
*/
int scols_column_is_trunc(struct libscols_column *cl)
{
if (!cl)
return -EINVAL;
return cl->flags & SCOLS_FL_TRUNC;
}
/**
* scols_column_is_tree:
* @cl: a pointer to a struct libscols_column instance
*
* Gets the value of @cl's flag tree.
*
* Returns: tree flag value, negative value in case of an error.
*/
int scols_column_is_tree(struct libscols_column *cl)
{
if (!cl)
return -EINVAL;
return cl->flags & SCOLS_FL_TREE;
}
/**
* scols_column_is_right:
* @cl: a pointer to a struct libscols_column instance
*
* Gets the value of @cl's flag right.
*
* Returns: right flag value, negative value in case of an error.
*/
int scols_column_is_right(struct libscols_column *cl)
{
if (!cl)
return -EINVAL;
return cl->flags & SCOLS_FL_RIGHT;
}
/**
* scols_column_is_strict_width:
* @cl: a pointer to a struct libscols_column instance
*
* Gets the value of @cl's flag strict_width.
*
* Returns: strict_width flag value, negative value in case of an error.
*/
int scols_column_is_strict_width(struct libscols_column *cl)
{
if (!cl)
return -EINVAL;
return cl->flags & SCOLS_FL_STRICTWIDTH;
}
/**
* scols_column_is_noextremes:
* @cl: a pointer to a struct libscols_column instance
*
* Gets the value of @cl's flag no_extremes.
*
* Returns: no_extremes flag value, negative value in case of an error.
*/
int scols_column_is_noextremes(struct libscols_column *cl)
{
if (!cl)
return -EINVAL;
return cl->flags & SCOLS_FL_NOEXTREMES;
}
