| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | static const struct EmacsModeEntry { | ||
| 2 | char name[15]; | ||
| 3 | uint8_t type; // FileTypeEnum | ||
| 4 | } emacs_modes[] = { | ||
| 5 | // Strings already in builtin_filetype_names[] need not be included here | ||
| 6 | {"autoconf", M4}, | ||
| 7 | {"c++", CPLUSPLUS}, | ||
| 8 | {"cperl", PERL}, | ||
| 9 | {"latex", TEX}, | ||
| 10 | {"makefile", MAKE}, | ||
| 11 | {"muttrc", CONFIG}, | ||
| 12 | {"nroff", ROFF}, | ||
| 13 | {"nxml", XML}, | ||
| 14 | {"shell-script", SH}, | ||
| 15 | }; | ||
| 16 | |||
| 17 | 46 | static ssize_t find_var_delim(const char *start, size_t len) | |
| 18 | { | ||
| 19 | 46 | const char *delim = xmemmem(start, len, STRN("-*-")); | |
| 20 |
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46 | return delim ? delim - start : -1; |
| 21 | } | ||
| 22 | |||
| 23 | 32 | static FileTypeEnum filetype_from_emacs_var(const StringView line) | |
| 24 | { | ||
| 25 | 32 | ssize_t delim_offset = find_var_delim(line.data, MIN(line.length, 128)); | |
| 26 |
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32 | if (delim_offset < 0) { |
| 27 | return NONE; | ||
| 28 | } | ||
| 29 | |||
| 30 | 14 | StringView vars = line; | |
| 31 | 14 | strview_remove_prefix(&vars, delim_offset + STRLEN("-*-")); | |
| 32 | 14 | strview_trim_left(&vars); | |
| 33 | |||
| 34 | 14 | delim_offset = find_var_delim(vars.data, MIN(vars.length, 128)); | |
| 35 |
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14 | if (delim_offset <= 0) { |
| 36 | return NONE; | ||
| 37 | } | ||
| 38 | |||
| 39 | 14 | vars.length = delim_offset; | |
| 40 | 14 | strview_trim_right(&vars); | |
| 41 | 14 | LOG_DEBUG("found emacs file-local vars: '%.*s'", (int)vars.length, vars.data); | |
| 42 | |||
| 43 | // TODO: Handle multiple local vars like e.g. "mode: example; other: xyz;", | ||
| 44 | // in addition to a single major mode string (by searching for "[Mm]ode:")? | ||
| 45 |
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14 | if (vars.length > FILETYPE_NAME_MAX) { |
| 46 | return NONE; | ||
| 47 | } | ||
| 48 | |||
| 49 | // Write the extracted var string into a buffer, to null-terminate and | ||
| 50 | // convert to lowercase (making the lookup effectively case-insensitive) | ||
| 51 | 14 | char name[FILETYPE_NAME_MAX + 1]; | |
| 52 | 14 | name[vars.length] = '\0'; | |
| 53 |
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201 | for (size_t i = 0; i < vars.length; i++) { |
| 54 | 187 | name[i] = ascii_tolower(vars.data[i]); | |
| 55 | } | ||
| 56 | |||
| 57 | // TODO: Remove "-ts" (tree-sitter), "-base" and "-ts-base" suffixes | ||
| 58 | // from name, before lookup? | ||
| 59 | 14 | const struct EmacsModeEntry *entry = BSEARCH(name, emacs_modes, vstrcmp); | |
| 60 |
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14 | if (entry) { |
| 61 | 2 | return entry->type; | |
| 62 | } | ||
| 63 | |||
| 64 | 12 | ssize_t ft = BSEARCH_IDX(name, builtin_filetype_names, vstrcmp); | |
| 65 |
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12 | return (ft >= 0) ? (FileTypeEnum)ft : NONE; |
| 66 | } | ||
| 67 | |||
| 68 | 164 | static FileTypeEnum filetype_from_signature(const StringView line) | |
| 69 | { | ||
| 70 |
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164 | if (line.length < 5) { |
| 71 | return NONE; | ||
| 72 | } | ||
| 73 | |||
| 74 |
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65 | switch (line.data[0]) { |
| 75 | 9 | case '<': | |
| 76 |
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9 | if (strview_has_prefix_icase(&line, "<!DOCTYPE HTML")) { |
| 77 | return HTML; | ||
| 78 |
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7 | } else if (strview_has_prefix(&line, "<!DOCTYPE")) { |
| 79 | return XML; | ||
| 80 |
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4 | } else if (strview_has_prefix(&line, "<?xml")) { |
| 81 | return XML; | ||
| 82 | } | ||
| 83 | break; | ||
| 84 | 3 | case '%': | |
| 85 |
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3 | if (strview_has_prefix(&line, "%YAML")) { |
| 86 | return YAML; | ||
| 87 | } | ||
| 88 | break; | ||
| 89 | 17 | case '#': | |
| 90 |
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17 | if (strview_has_prefix(&line, "#compdef ")) { |
| 91 | return SH; | ||
| 92 |
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16 | } else if (strview_has_prefix(&line, "#autoload")) { |
| 93 | return SH; | ||
| 94 | } | ||
| 95 | break; | ||
| 96 | 1 | case 'I': | |
| 97 |
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1 | return strview_has_prefix(&line, "ISO-10303-21;") ? STEP : NONE; |
| 98 | 3 | case 'd': | |
| 99 |
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3 | return strview_has_prefix(&line, "diff --git") ? DIFF : NONE; |
| 100 | case '/': | ||
| 101 | case '.': | ||
| 102 | case ';': | ||
| 103 | case '-': | ||
| 104 | case '\\': | ||
| 105 | // See: "emacs style file-local variables" in test_find_ft_firstline() | ||
| 106 | break; | ||
| 107 | default: | ||
| 108 | return NONE; | ||
| 109 | } | ||
| 110 | |||
| 111 | 32 | return filetype_from_emacs_var(line); | |
| 112 | } | ||
| 113 |