dte test coverage

Directory: ./
File: src/indent.c
Date: 2025-07-19 20:13:10
Exec Total Coverage
Lines: 99 111 89.2%
Functions: 8 8 100.0%
Branches: 44 54 81.5%
Line Branch Exec Source
1 #include <string.h>
2 #include <sys/types.h>
3 #include "indent.h"
4 #include "regexp.h"
5 #include "util/xmalloc.h"
6
7 44 char *make_indent(const LocalOptions *options, size_t width)
8 {
9
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 44 if (width == 0) {
10 return NULL;
11 }
12
13
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 27 if (use_spaces_for_indent(options)) {
14 23 char *str = xmalloc(width + 1);
15 23 str[width] = '\0';
16 23 return memset(str, ' ', width);
17 }
18
19 4 size_t tw = options->tab_width;
20 4 size_t ntabs = indent_level(width, tw);
21 4 size_t nspaces = indent_remainder(width, tw);
22 4 size_t n = ntabs + nspaces;
23 4 char *str = xmalloc(n + 1);
24 4 memset(str + ntabs, ' ', nspaces);
25 4 str[n] = '\0';
26 4 return memset(str, '\t', ntabs);
27 }
28
29 // Return true if the contents of `line` triggers an additional level
30 // of auto-indent on the next line
31 36 static bool line_contents_increases_indent (
32 const LocalOptions *options,
33 const StringView *line
34 ) {
35 36 static regex_t re1, re2;
36 36 static bool compiled;
37
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 36 if (!compiled) {
38 // TODO: Make these patterns configurable via a local option
39 1 static const char pat1[] = "\\{[\t ]*(//.*|/\\*.*\\*/[\t ]*)?$";
40 1 static const char pat2[] = "\\}[\t ]*(//.*|/\\*.*\\*/[\t ]*)?$";
41 1 regexp_compile_or_fatal_error(&re1, pat1, REG_NEWLINE | REG_NOSUB);
42 1 regexp_compile_or_fatal_error(&re2, pat2, REG_NEWLINE | REG_NOSUB);
43 1 compiled = true;
44 }
45
46
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 36 if (options->brace_indent) {
47
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 13 if (regexp_exec(&re1, line->data, line->length, 0, NULL, 0)) {
48 return true;
49 }
50
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 12 if (regexp_exec(&re2, line->data, line->length, 0, NULL, 0)) {
51 return false;
52 }
53 }
54
55 35 const InternedRegexp *ir = options->indent_regex;
56
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 35 if (!ir) {
57 return false;
58 }
59
60 2 BUG_ON(ir->str[0] == '\0');
61 2 return regexp_exec(&ir->re, line->data, line->length, 0, NULL, 0);
62 }
63
64 36 char *get_indent_for_next_line(const LocalOptions *options, const StringView *line)
65 {
66 36 size_t curr_width = get_indent_width(line, options->tab_width);
67 36 size_t next_width = next_indent_width(curr_width, options->indent_width);
68 36 bool increase = line_contents_increases_indent(options, line);
69
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 70 return make_indent(options, increase ? next_width : curr_width);
70 }
71
72 64 IndentInfo get_indent_info(const LocalOptions *options, const StringView *line)
73 {
74 64 const char *buf = line->data;
75 64 const size_t len = line->length;
76 64 const size_t tw = options->tab_width;
77 64 const size_t iw = options->indent_width;
78 64 const bool space_indent = use_spaces_for_indent(options);
79 64 IndentInfo info = {.sane = true};
80 64 size_t spaces = 0;
81 64 size_t tabs = 0;
82 64 size_t pos = 0;
83
84
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 636 for (; pos < len; pos++) {
85
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 631 if (buf[pos] == ' ') {
86 564 info.width++;
87 564 spaces++;
88
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 67 } else if (buf[pos] == '\t') {
89 8 info.width = next_indent_width(info.width, tw);
90 8 tabs++;
91 } else {
92 break;
93 }
94
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 572 if (indent_remainder(info.width, iw) == 0 && info.sane) {
95
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 145 info.sane = space_indent ? !tabs : !spaces;
96 }
97 }
98
99 64 info.level = indent_level(info.width, iw);
100 64 info.wsonly = (pos == len);
101 64 info.bytes = spaces + tabs;
102 64 return info;
103 }
104
105 44 size_t get_indent_width(const StringView *line, unsigned int tab_width)
106 {
107 44 const char *buf = line->data;
108 44 size_t width = 0;
109
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 132 for (size_t i = 0, n = line->length; i < n; i++) {
110
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 129 if (buf[i] == ' ') {
111 88 width++;
112
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 41 } else if (buf[i] == '\t') {
113 ✗ width = next_indent_width(width, tab_width);
114 } else {
115 break;
116 }
117 }
118 44 return width;
119 }
120
121 22 static ssize_t get_current_indent_bytes (
122 const char *buf,
123 size_t cursor_offset,
124 unsigned int iw,
125 unsigned int tw
126 ) {
127 22 size_t bytes = 0;
128 22 size_t width = 0;
129
130
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 22 for (size_t i = 0; i < cursor_offset; i++) {
131
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 20 if (indent_remainder(width, iw) == 0) {
132 20 bytes = 0;
133 20 width = 0;
134 }
135
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 20 switch (buf[i]) {
136 ✗ case '\t':
137 ✗ width = next_indent_width(width, tw);
138 ✗ break;
139 ✗ case ' ':
140 ✗ width++;
141 ✗ break;
142 default:
143 // Cursor not at indentation
144 return -1;
145 }
146 ✗ bytes++;
147 }
148
149
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 2 if (indent_remainder(width, iw)) {
150 // Cursor at middle of indentation level
151 return -1;
152 }
153
154 2 return (ssize_t)bytes;
155 }
156
157 3 size_t get_indent_level_bytes_left(const LocalOptions *options, const BlockIter *cursor)
158 {
159 3 BlockIter bol = *cursor;
160 3 size_t cursor_offset = block_iter_bol(&bol);
161
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 3 if (cursor_offset == 0) {
162 return 0; // cursor at BOL
163 }
164
165 3 StringView line = block_iter_get_line(&bol);
166 3 unsigned int iw = options->indent_width;
167 3 unsigned int tw = options->tab_width;
168 3 ssize_t ibytes = get_current_indent_bytes(line.data, cursor_offset, iw, tw);
169 3 return MAX(ibytes, 0);
170 }
171
172 19 size_t get_indent_level_bytes_right(const LocalOptions *options, const BlockIter *cursor)
173 {
174 19 unsigned int iw = options->indent_width;
175 19 unsigned int tw = options->tab_width;
176 19 StringView line;
177 19 size_t cursor_offset = get_current_line_and_offset(cursor, &line);
178 19 ssize_t ibytes = get_current_indent_bytes(line.data, cursor_offset, iw, tw);
179
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 19 if (ibytes < 0) {
180 return 0;
181 }
182
183 2 size_t width = 0;
184
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 3 for (size_t i = cursor_offset, n = line.length; i < n; i++) {
185
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 3 switch (line.data[i]) {
186 ✗ case '\t':
187 ✗ width = next_indent_width(width, tw);
188 ✗ break;
189 1 case ' ':
190 1 width++;
191 1 break;
192 default:
193 // No full indentation level at cursor position
194 return 0;
195 }
196
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 1 if (indent_remainder(width, iw) == 0) {
197 ✗ return i - cursor_offset + 1;
198 }
199 }
200
201 return 0;
202 }
203