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#ifndef INDENT_H
#define INDENT_H
#include <stdbool.h>
#include <stddef.h>
#include <string.h>
#include <strings.h>
#include "block-iter.h"
#include "options.h"
#include "util/debug.h"
#include "util/macros.h"
#include "util/string-view.h"
typedef struct {
size_t bytes; // Size in bytes
size_t width; // Width in columns
size_t level; // Number of whole `indent-width` levels
bool wsonly; // Empty or whitespace-only line
// Only spaces or tabs, depending on `use_spaces_for_indent()`.
// Note that a "sane" line can contain spaces after tabs for alignment.
bool sane;
} IndentInfo;
// Divide `x` by `d`, to obtain the number of whole indent levels.
// If `d` is a power of 2, shift right by `ffs(d) - 1` instead, to
// avoid the expensive divide operation. This optimization applies
// to widths of 1, 2, 4 and 8, which covers all of the sensible ones.
static inline size_t indent_level(size_t x, size_t d)
{
BUG_ON(d - 1 > 7);
return likely(IS_POWER_OF_2(d)) ? x >> (ffs(d) - 1) : x / d;
}
static inline size_t indent_remainder(size_t x, size_t m)
{
BUG_ON(m - 1 > 7);
return likely(IS_POWER_OF_2(m)) ? x & (m - 1) : x % m;
}
static inline size_t next_indent_width(size_t x, size_t mul)
{
BUG_ON(mul - 1 > 7);
if (likely(IS_POWER_OF_2(mul))) {
size_t mask = ~(mul - 1);
return (x & mask) + mul;
}
return ((x + mul) / mul) * mul;
}
char *make_indent(const LocalOptions *options, size_t width);
char *get_indent_for_next_line(const LocalOptions *options, const StringView *line);
IndentInfo get_indent_info(const LocalOptions *options, const StringView *line);
size_t get_indent_width(const LocalOptions *options, const StringView *line);
size_t get_indent_level_bytes_left(const LocalOptions *options, BlockIter *cursor);
size_t get_indent_level_bytes_right(const LocalOptions *options, BlockIter *cursor);
#endif
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