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#ifndef TXT_H
#define TXT_H
#include "dynarr.h"
typedef enum : u8 {
TXT_SRC,
TXT_ADD
} TxtBufIdx;
typedef struct TxtPiece {
TxtBufIdx buf;
u32 ofs, n;
} TxtPiece;
typedef struct {
char *s;
u32 n, c;
} TxtBuf;
typedef struct {
DYNARR(TxtPiece) ptbl;
TxtBuf buf[2];
u32 len;
} Txt;
typedef struct {
Txt *t;
u32 p, i;
} TxtLoc;
u32 txt_split_piece(Txt *b, u32 pi, u32 i);
void txt_remove_piece(Txt *b, u32 pi);
void txt_insert_piece(Txt *b, u32 pi, TxtBufIdx buf, u32 ofs, u32 n);
u32 txt_insert(Txt *b, u32 cur, const char *s, u32 n);
u32 txt_delete(Txt *b, u32 cur, u32 n);
u32 txt_insert_c(Txt *b, u32 cur, u32 ch);
u32 txt_delete_c(Txt *b, u32 cur);
int txt_load(Txt *b, const char *path);
int txt_save(Txt *b, const char *path);
void txt_free(Txt *b);
TxtLoc txt_at(Txt *b, u32 cur);
u32 txt_ofs(Txt *b, TxtLoc l);
TxtLoc txt_next(Txt *b, TxtLoc l);
TxtLoc txt_prev(Txt *b, TxtLoc l);
int txt_at_start(Txt *b, TxtLoc l);
int txt_at_end(Txt *b, TxtLoc l);
int txt_before(TxtLoc a, TxtLoc b);
int txt_after(TxtLoc a, TxtLoc b);
u32 txt_chr(Txt *b, TxtLoc l);
u8 txt_byte(Txt *b, TxtLoc l);
u32 txt_chr_next(Txt *b, TxtLoc *l);
#endif
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