1 3b0f3d61 2020-01-22 neels /*
  2 3b0f3d61 2020-01-22 neels  * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de>
  3 3b0f3d61 2020-01-22 neels  *
  4 3b0f3d61 2020-01-22 neels  * Permission to use, copy, modify, and distribute this software for any
  5 3b0f3d61 2020-01-22 neels  * purpose with or without fee is hereby granted, provided that the above
  6 3b0f3d61 2020-01-22 neels  * copyright notice and this permission notice appear in all copies.
  7 3b0f3d61 2020-01-22 neels  *
  8 3b0f3d61 2020-01-22 neels  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 3b0f3d61 2020-01-22 neels  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 3b0f3d61 2020-01-22 neels  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 3b0f3d61 2020-01-22 neels  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 3b0f3d61 2020-01-22 neels  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 3b0f3d61 2020-01-22 neels  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 3b0f3d61 2020-01-22 neels  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 3b0f3d61 2020-01-22 neels  */
 16 3b0f3d61 2020-01-22 neels 
 17 3b0f3d61 2020-01-22 neels #pragma once
 18 3b0f3d61 2020-01-22 neels 
 19 3b0f3d61 2020-01-22 neels #define DEBUG 0
 20 3b0f3d61 2020-01-22 neels 
 21 3b0f3d61 2020-01-22 neels #if DEBUG
 22 3b0f3d61 2020-01-22 neels #include <stdio.h>
 23 3b0f3d61 2020-01-22 neels #define print(args...) fprintf(stderr, ##args)
 24 3b0f3d61 2020-01-22 neels #define debug print
 25 3b0f3d61 2020-01-22 neels #define debug_dump dump
 26 3b0f3d61 2020-01-22 neels #define debug_dump_atom dump_atom
 27 3b0f3d61 2020-01-22 neels #define debug_dump_atoms dump_atoms
 28 3b0f3d61 2020-01-22 neels 
 29 3b0f3d61 2020-01-22 neels static inline void dump_atom(const struct diff_data *left, const struct diff_data *right, const struct diff_atom *atom)
 30 3b0f3d61 2020-01-22 neels {
 31 3b0f3d61 2020-01-22 neels 	if (!atom) {
 32 3b0f3d61 2020-01-22 neels 		print("NULL atom\n");
 33 3b0f3d61 2020-01-22 neels 		return;
 34 3b0f3d61 2020-01-22 neels 	}
 35 3b0f3d61 2020-01-22 neels 	if (left)
 36 3b0f3d61 2020-01-22 neels 		print(" %3ld", diff_atom_root_idx(left, atom));
 37 3b0f3d61 2020-01-22 neels 	if (right && atom->patience.pos_in_other)
 38 3b0f3d61 2020-01-22 neels 		print(" %3ld", diff_atom_root_idx(right, atom->patience.pos_in_other));
 39 3b0f3d61 2020-01-22 neels 
 40 3b0f3d61 2020-01-22 neels 	print(" %s%s '", atom->patience.unique_here ? "u" : " ", atom->patience.unique_in_both ? "c" : " ");
 41 3b0f3d61 2020-01-22 neels 	const char *s;
 42 3b0f3d61 2020-01-22 neels 	for (s = atom->at; s < (const char*)(atom->at + atom->len); s++) {
 43 3b0f3d61 2020-01-22 neels 		if (*s == '\r')
 44 3b0f3d61 2020-01-22 neels 			print("\\r");
 45 3b0f3d61 2020-01-22 neels 		else if (*s == '\n')
 46 3b0f3d61 2020-01-22 neels 			print("\\n");
 47 fbd55577 2020-01-27 neels 		else if ((*s < 32 || *s >= 127) && (*s != '\t'))
 48 3b0f3d61 2020-01-22 neels 			print("\\x%02x", *s);
 49 3b0f3d61 2020-01-22 neels 		else
 50 3b0f3d61 2020-01-22 neels 			print("%c", *s);
 51 3b0f3d61 2020-01-22 neels 	}
 52 3b0f3d61 2020-01-22 neels 	print("'\n");
 53 3b0f3d61 2020-01-22 neels }
 54 3b0f3d61 2020-01-22 neels 
 55 3b0f3d61 2020-01-22 neels static inline void dump_atoms(const struct diff_data *d, struct diff_atom *atom, unsigned int count)
 56 3b0f3d61 2020-01-22 neels {
 57 13b15273 2020-01-27 neels 	if (count > 42) {
 58 13b15273 2020-01-27 neels 		dump_atoms(d, atom, 20);
 59 13b15273 2020-01-27 neels 		print("[%u lines skipped]\n", count - 20 - 20);
 60 13b15273 2020-01-27 neels 		dump_atoms(d, atom + count - 20, 20);
 61 13b15273 2020-01-27 neels 		return;
 62 13b15273 2020-01-27 neels 	} else {
 63 13b15273 2020-01-27 neels 		struct diff_atom *i;
 64 13b15273 2020-01-27 neels 		foreach_diff_atom(i, atom, count) {
 65 13b15273 2020-01-27 neels 			dump_atom(d, NULL, i);
 66 13b15273 2020-01-27 neels 		}
 67 3b0f3d61 2020-01-22 neels 	}
 68 3b0f3d61 2020-01-22 neels }
 69 3b0f3d61 2020-01-22 neels 
 70 3b0f3d61 2020-01-22 neels static inline void dump(struct diff_data *d)
 71 3b0f3d61 2020-01-22 neels {
 72 3b0f3d61 2020-01-22 neels 	dump_atoms(d, d->atoms.head, d->atoms.len);
 73 3b0f3d61 2020-01-22 neels }
 74 3b0f3d61 2020-01-22 neels 
 75 3b0f3d61 2020-01-22 neels static inline void dump_myers_graph(const struct diff_data *l, const struct diff_data *r,
 76 3b0f3d61 2020-01-22 neels 				    int *kd)
 77 3b0f3d61 2020-01-22 neels {
 78 3b0f3d61 2020-01-22 neels 	int x;
 79 3b0f3d61 2020-01-22 neels 	int y;
 80 3b0f3d61 2020-01-22 neels 	print("  ");
 81 3b0f3d61 2020-01-22 neels 	for (x = 0; x <= l->atoms.len; x++)
 82 3b0f3d61 2020-01-22 neels 		print("%2d", x);
 83 3b0f3d61 2020-01-22 neels 	print("\n");
 84 3b0f3d61 2020-01-22 neels 
 85 3b0f3d61 2020-01-22 neels 	for (y = 0; y <= r->atoms.len; y++) {
 86 3b0f3d61 2020-01-22 neels 		print("%2d ", y);
 87 3b0f3d61 2020-01-22 neels 		for (x = 0; x <= l->atoms.len; x++) {
 88 3b0f3d61 2020-01-22 neels 
 89 3b0f3d61 2020-01-22 neels 			/* print d advancements from kd, if any. */
 90 3b0f3d61 2020-01-22 neels 			int d = -1;
 91 3b0f3d61 2020-01-22 neels 			if (kd) {
 92 3b0f3d61 2020-01-22 neels 				int max = l->atoms.len + r->atoms.len;
 93 3b0f3d61 2020-01-22 neels 				size_t kd_len = max + 1 + max;
 94 3b0f3d61 2020-01-22 neels 				int *kd_pos = kd;
 95 3b0f3d61 2020-01-22 neels 				int di;
 96 3b0f3d61 2020-01-22 neels #define xk_to_y(X, K) ((X) - (K))
 97 3b0f3d61 2020-01-22 neels 				for (di = 0; di < max; di++) {
 98 3b0f3d61 2020-01-22 neels 					int ki;
 99 3b0f3d61 2020-01-22 neels 					for (ki = di; ki >= -di; ki -= 2) {
100 3b0f3d61 2020-01-22 neels 						if (x == kd_pos[ki]
101 3b0f3d61 2020-01-22 neels 						    && y == xk_to_y(x, ki)) {
102 3b0f3d61 2020-01-22 neels 							d = di;
103 3b0f3d61 2020-01-22 neels 							break;
104 3b0f3d61 2020-01-22 neels 						}
105 3b0f3d61 2020-01-22 neels 					}
106 3b0f3d61 2020-01-22 neels 					if (d >= 0)
107 3b0f3d61 2020-01-22 neels 						break;
108 3b0f3d61 2020-01-22 neels 					kd_pos += kd_len;
109 3b0f3d61 2020-01-22 neels 				}
110 3b0f3d61 2020-01-22 neels 			}
111 3b0f3d61 2020-01-22 neels 			if (d >= 0)
112 3b0f3d61 2020-01-22 neels 				print("%d", d);
113 3b0f3d61 2020-01-22 neels 			else
114 3b0f3d61 2020-01-22 neels 				print("o");
115 3b0f3d61 2020-01-22 neels 			if (x < l->atoms.len && d < 10)
116 3b0f3d61 2020-01-22 neels 				print("-");
117 3b0f3d61 2020-01-22 neels 		}
118 3b0f3d61 2020-01-22 neels 		print("\n");
119 3b0f3d61 2020-01-22 neels 		if (y == r->atoms.len)
120 3b0f3d61 2020-01-22 neels 			break;
121 3b0f3d61 2020-01-22 neels 
122 3b0f3d61 2020-01-22 neels 		print("   ");
123 3b0f3d61 2020-01-22 neels 		for (x = 0; x < l->atoms.len; x++) {
124 3b0f3d61 2020-01-22 neels 			if (diff_atom_same(&l->atoms.head[x], &r->atoms.head[y]))
125 3b0f3d61 2020-01-22 neels 				print("|\\");
126 3b0f3d61 2020-01-22 neels 			else
127 3b0f3d61 2020-01-22 neels 				print("| ");
128 3b0f3d61 2020-01-22 neels 		}
129 3b0f3d61 2020-01-22 neels 		print("|\n");
130 3b0f3d61 2020-01-22 neels 	}
131 3b0f3d61 2020-01-22 neels }
132 3b0f3d61 2020-01-22 neels 
133 72057b70 2020-01-27 neels static inline void debug_dump_myers_graph(const struct diff_data *l, const struct diff_data *r,
134 72057b70 2020-01-27 neels 				    int *kd)
135 72057b70 2020-01-27 neels {
136 72057b70 2020-01-27 neels 	if (l->atoms.len > 99 || r->atoms.len > 99)
137 72057b70 2020-01-27 neels 		return;
138 72057b70 2020-01-27 neels 	dump_myers_graph(l, r, kd);
139 72057b70 2020-01-27 neels }
140 72057b70 2020-01-27 neels 
141 3b0f3d61 2020-01-22 neels #else
142 3b0f3d61 2020-01-22 neels #define debug(args...)
143 3b0f3d61 2020-01-22 neels #define debug_dump(args...)
144 3b0f3d61 2020-01-22 neels #define debug_dump_atom(args...)
145 3b0f3d61 2020-01-22 neels #define debug_dump_atoms(args...)
146 3b0f3d61 2020-01-22 neels #define debug_dump_myers_graph(args...)
147 3b0f3d61 2020-01-22 neels #endif