/* See LICENSE file for copyright and license details. */
#include "libpatch.h"

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#define MIN(A, B) ((A) < (B) ? (A) : (B))
#define MAX(A, B) ((A) > (B) ? (A) : (B))

#define IS_LINE(T) ((T) >= LIBPATCH_PATCH_CONTEXT && (T) <= LIBPATCH_PATCH_POSTCHANGE)


struct printer_internals {
	void (*put)(struct libpatch_diff2_printer *this, const char *text, size_t len);
	union {
		FILE *stream;
		int fd;
	} f;
};


void libpatch_plain_diff2_printer__(struct libpatch_diff2_printer *printer);
struct libpatch_diff2_printer *libpatch_stream_diff2_printer__(FILE *output);
struct libpatch_diff2_printer *libpatch_fd_diff2_printer__(int output);

size_t libpatch_next_line__(const char **text, size_t *textlen, size_t lastlen);

int libpatch_reverse_hunks__(struct libpatch_patch *patch, size_t patchlen,
                             const size_t *hunks, size_t nhunks,
                             struct libpatch_patch **patchcopy, size_t *patchcopysize);

size_t libpatch_get_zu__(const char *text, size_t len, size_t *out);

int libpatch_append_to_patch__(struct libpatch_patch **patch, size_t *patchlen, size_t *size,
                               size_t stroff, size_t strlen, int type);

#define APPEND_STRING(OFF, TYPE)\
	do {\
		if (libpatch_append_to_patch__(patch, patchlen, &size,\
		                               (size_t)(&text[OFF] - patchtext),\
		                               len - (size_t)(OFF), (TYPE)))\
			goto fail;\
	} while (0)

#define APPEND_OPTSTRING(OFF, TYPE)\
	APPEND_STRING((OFF) + ((OFF) < len && text[OFF] == ' '), (TYPE))

#define APPEND_NO_TEXT(TYPE)\
	APPEND_STRING(len, TYPE)