1 /* Normal-format output routines for GNU DIFF. 2 3 Copyright (C) 1988-1989, 1993, 1995, 1998, 2001, 2006, 2009-2013, 2015-2018 4 Free Software Foundation, Inc. 5 6 This file is part of GNU DIFF. 7 8 This program is free software: you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation, either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #include "diff.h" 22 23 static void print_normal_hunk (struct change *); 24 25 /* Print the edit-script SCRIPT as a normal diff. 26 INF points to an array of descriptions of the two files. */ 27 28 void 29 print_normal_script (struct change *script) 30 { 31 print_script (script, find_change, print_normal_hunk); 32 } 33 34 /* Print a hunk of a normal diff. 35 This is a contiguous portion of a complete edit script, 36 describing changes in consecutive lines. */ 37 38 static void 39 print_normal_hunk (struct change *hunk) 40 { 41 lin first0, last0, first1, last1; 42 register lin i; 43 44 /* Determine range of line numbers involved in each file. */ 45 enum changes changes = analyze_hunk (hunk, &first0, &last0, &first1, &last1); 46 if (!changes) 47 return; 48 49 begin_output (); 50 51 /* Print out the line number header for this hunk */ 52 set_color_context (LINE_NUMBER_CONTEXT); 53 print_number_range (',', &files[0], first0, last0); 54 fputc (change_letter[changes], outfile); 55 print_number_range (',', &files[1], first1, last1); 56 set_color_context (RESET_CONTEXT); 57 fputc ('\n', outfile); 58 59 /* Print the lines that the first file has. */ 60 if (changes & OLD) 61 { 62 for (i = first0; i <= last0; i++) 63 { 64 set_color_context (DELETE_CONTEXT); 65 print_1_line_nl ("<", &files[0].linbuf[i], true); 66 set_color_context (RESET_CONTEXT); 67 if (files[0].linbuf[i + 1][-1] == '\n') 68 putc ('\n', outfile); 69 } 70 } 71 72 if (changes == CHANGED) 73 fputs ("---\n", outfile); 74 75 /* Print the lines that the second file has. */ 76 if (changes & NEW) 77 { 78 for (i = first1; i <= last1; i++) 79 { 80 set_color_context (ADD_CONTEXT); 81 print_1_line_nl (">", &files[1].linbuf[i], true); 82 set_color_context (RESET_CONTEXT); 83 if (files[1].linbuf[i + 1][-1] == '\n') 84 putc ('\n', outfile); 85 } 86 } 87 } 88