dte test coverage

Directory: ./
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Coverage Exec / Excl / Total
Lines: 100.0% 61 / 0 / 61
Functions: 100.0% 6 / 0 / 6
Branches: 90.2% 55 / 0 / 61
src/filetype/signatures.c
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1 #include <stddef.h>
2 #include <stdint.h>
3 #include "filetype.h"
4 #include "filetype/types.h"
5 #include "util/ascii.h"
6 #include "util/bsearch.h"
7 #include "util/log.h"
8 #include "util/strtonum.h"
9 #include "util/xmemmem.h"
10
11 static const struct EmacsModeEntry {
12 char name[15];
13 uint8_t type; // FileTypeEnum
14 } emacs_modes[] = {
15 // Strings already in builtin_filetype_names[] need not be included here
16 {"autoconf", M4},
17 {"c++", CPLUSPLUS},
18 {"cperl", PERL},
19 {"latex", TEX},
20 {"makefile", MAKE},
21 {"muttrc", CONFIG},
22 {"nroff", ROFF},
23 {"nxml", XML},
24 {"shell-script", SH},
25 };
26
27 24 UNITTEST {
28 24 CHECK_BSEARCH_ARRAY(emacs_modes, name);
29 24 }
30
31 47 static ssize_t find_var_delim(StringView sv)
32 {
33 47 const char *delim = xmemmem(sv.data, MIN(sv.length, 128), STRN("-*-"));
34
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 47 return delim ? delim - sv.data : -1;
35 }
36
37 33 static FileTypeEnum filetype_from_emacs_var(const StringView line)
38 {
39 33 ssize_t pos = find_var_delim(line);
40
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 33 if (pos < 0) {
41 return NONE;
42 }
43
44 14 size_t dlen = STRLEN("-*-");
45 14 StringView vars = strview_from_slice(line.data, pos + dlen, line.length);
46 14 strview_trim_left(&vars);
47
48 14 pos = find_var_delim(vars);
49
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 14 if (pos <= 0) {
50 return NONE;
51 }
52
53 14 vars.length = pos;
54 14 strview_trim_right(&vars);
55 14 LOG_DEBUG("found emacs file-local vars: '%.*s'", (int)vars.length, vars.data);
56
57 // TODO: Handle multiple local vars like e.g. "mode: example; other: xyz;",
58 // in addition to a single major mode string (by searching for "[Mm]ode:")?
59
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 14 if (vars.length > FILETYPE_NAME_MAX) {
60 return NONE;
61 }
62
63 // Write the extracted var string into a buffer, to null-terminate and
64 // convert to lowercase (making the lookup effectively case-insensitive)
65 14 char name[FILETYPE_NAME_MAX + 1];
66 14 name[vars.length] = '\0';
67
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 201 for (size_t i = 0; i < vars.length; i++) {
68 187 name[i] = ascii_tolower(vars.data[i]);
69 }
70
71 // TODO: Remove "-ts" (tree-sitter), "-base" and "-ts-base" suffixes
72 // from name, before lookup?
73 14 const struct EmacsModeEntry *entry = BSEARCH(name, emacs_modes, vstrcmp);
74
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 14 if (entry) {
75 2 return entry->type;
76 }
77
78 12 ssize_t ft = BSEARCH_IDX(name, builtin_filetype_names, vstrcmp);
79
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 12 return (ft >= 0) ? (FileTypeEnum)ft : NONE;
80 }
81
82 4 static bool is_gitlog_commit_line(StringView line)
83 {
84
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 4 if (!strview_remove_matching_prefix(&line, "commit ") || line.length < 40) {
85 return false;
86 }
87
88 4 size_t ndigits = ascii_hex_prefix_length(line);
89
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 4 if (ndigits < 40) {
90 return false;
91 }
92
93 3 strview_remove_prefix(&line, ndigits);
94
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 4 return line.length == 0 || strview_has_prefix_and_suffix(line, " (", ")");
95 }
96
97 178 FileTypeEnum filetype_from_signature(StringView line)
98 {
99
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 178 if (line.length < 5) {
100 return NONE;
101 }
102
103
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 77 switch (line.data[0]) {
104 9 case '<':
105
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 9 if (strview_has_prefix_icase(line, "<!DOCTYPE HTML")) {
106 return HTML;
107
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 7 } else if (strview_has_either_prefix(line, "<!DOCTYPE", "<?xml")) {
108 return XML;
109 }
110 break;
111 3 case '%':
112
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 3 if (strview_has_prefix(line, "%YAML")) {
113 return YAML;
114 }
115 break;
116 18 case '#':
117
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 18 if (strview_has_either_prefix(line, "#compdef ", "#autoload")) {
118 return SH;
119 }
120 break;
121 1 case 'I':
122
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 1 return strview_has_prefix(line, "ISO-10303-21;") ? STEP : NONE;
123 4 case 'c':
124
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 4 return is_gitlog_commit_line(line) ? GITLOG : NONE;
125 3 case 'd':
126
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 3 return strview_has_prefix(line, "diff --git") ? DIFF : NONE;
127 2 case 's':
128
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 2 return strview_has_prefix(line, "stash@{") ? GITSTASH : NONE;
129 case '/':
130 case '.':
131 case ';':
132 case '-':
133 case '\\':
134 // See: "emacs style file-local variables" in test_find_ft_firstline()
135 break;
136 default:
137 return NONE;
138 }
139
140 33 return filetype_from_emacs_var(line);
141 }
142
143 94 FileTypeEnum filetype_from_signature_late(StringView line)
144 {
145 94 strview_trim_right(&line);
146
147 94 if (
148
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 94 line.length >= 4
149
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 54 && strview_has_prefix(line, "[")
150
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 5 && strview_has_suffix(line, "]")
151
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 3 && is_word_byte(line.data[1])
152
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 2 && !strview_contains_char_type(line, ASCII_CNTRL)
153 ) {
154 // Use "ini" filetype, if first line looks like an INI [section]
155 2 return INI;
156 }
157
158 return NONE;
159 }
160