nonbinary.computer
forked from
oppi.li/claude-code
source dump of claude code
oppi.li
1/**
2 * Binary file extensions to skip for text-based operations.
3 * These files can't be meaningfully compared as text and are often large.
4 */
5export const BINARY_EXTENSIONS = new Set([
6 // Images
7 '.png',
8 '.jpg',
9 '.jpeg',
10 '.gif',
11 '.bmp',
12 '.ico',
13 '.webp',
14 '.tiff',
15 '.tif',
16 // Videos
17 '.mp4',
18 '.mov',
19 '.avi',
20 '.mkv',
21 '.webm',
22 '.wmv',
23 '.flv',
24 '.m4v',
25 '.mpeg',
26 '.mpg',
27 // Audio
28 '.mp3',
29 '.wav',
30 '.ogg',
31 '.flac',
32 '.aac',
33 '.m4a',
34 '.wma',
35 '.aiff',
36 '.opus',
37 // Archives
38 '.zip',
39 '.tar',
40 '.gz',
41 '.bz2',
42 '.7z',
43 '.rar',
44 '.xz',
45 '.z',
46 '.tgz',
47 '.iso',
48 // Executables/binaries
49 '.exe',
50 '.dll',
51 '.so',
52 '.dylib',
53 '.bin',
54 '.o',
55 '.a',
56 '.obj',
57 '.lib',
58 '.app',
59 '.msi',
60 '.deb',
61 '.rpm',
62 // Documents (PDF is here; FileReadTool excludes it at the call site)
63 '.pdf',
64 '.doc',
65 '.docx',
66 '.xls',
67 '.xlsx',
68 '.ppt',
69 '.pptx',
70 '.odt',
71 '.ods',
72 '.odp',
73 // Fonts
74 '.ttf',
75 '.otf',
76 '.woff',
77 '.woff2',
78 '.eot',
79 // Bytecode / VM artifacts
80 '.pyc',
81 '.pyo',
82 '.class',
83 '.jar',
84 '.war',
85 '.ear',
86 '.node',
87 '.wasm',
88 '.rlib',
89 // Database files
90 '.sqlite',
91 '.sqlite3',
92 '.db',
93 '.mdb',
94 '.idx',
95 // Design / 3D
96 '.psd',
97 '.ai',
98 '.eps',
99 '.sketch',
100 '.fig',
101 '.xd',
102 '.blend',
103 '.3ds',
104 '.max',
105 // Flash
106 '.swf',
107 '.fla',
108 // Lock/profiling data
109 '.lockb',
110 '.dat',
111 '.data',
112])
113
114/**
115 * Check if a file path has a binary extension.
116 */
117export function hasBinaryExtension(filePath: string): boolean {
118 const ext = filePath.slice(filePath.lastIndexOf('.')).toLowerCase()
119 return BINARY_EXTENSIONS.has(ext)
120}
121
122/**
123 * Number of bytes to read for binary content detection.
124 */
125const BINARY_CHECK_SIZE = 8192
126
127/**
128 * Check if a buffer contains binary content by looking for null bytes
129 * or a high proportion of non-printable characters.
130 */
131export function isBinaryContent(buffer: Buffer): boolean {
132 // Check first BINARY_CHECK_SIZE bytes (or full buffer if smaller)
133 const checkSize = Math.min(buffer.length, BINARY_CHECK_SIZE)
134
135 let nonPrintable = 0
136 for (let i = 0; i < checkSize; i++) {
137 const byte = buffer[i]!
138 // Null byte is a strong indicator of binary
139 if (byte === 0) {
140 return true
141 }
142 // Count non-printable, non-whitespace bytes
143 // Printable ASCII is 32-126, plus common whitespace (9, 10, 13)
144 if (
145 byte < 32 &&
146 byte !== 9 && // tab
147 byte !== 10 && // newline
148 byte !== 13 // carriage return
149 ) {
150 nonPrintable++
151 }
152 }
153
154 // If more than 10% non-printable, likely binary
155 return nonPrintable / checkSize > 0.1
156}