diff options
Diffstat (limited to 'tags.c')
| -rw-r--r-- | tags.c | 86 |
1 files changed, 86 insertions, 0 deletions
@@ -0,0 +1,86 @@ +void tags_free(TagsFile *f) { + free(f->file_data); + arr_free(f->tags); + memset(f, 0, sizeof *f); +} + +void tags_read(Ted *ted, TagsFile *f) { + change_directory(ted->cwd); + Settings const *settings = &ted->settings; + char const *tags_filename = settings->tags_filename; + FILE *file = fopen(tags_filename, "rb"); + tags_free(f); + if (file) { + fseek(file, 0, SEEK_END); + size_t file_size = (size_t)ftell(file); + fseek(file, 0, SEEK_SET); + char *file_data = ted_calloc(ted, file_size + 1, 1); + if (file_data) { + f->file_data = file_data; + fread(file_data, 1, file_size, file); + char *p = file_data; + while (1) { + // each line in the file is of the format: + // tag name\tfile name\taddress + // or + // tag name\tfile name\taddress;" additional information + + char *end = p + strcspn(p, "\n"); + bool eof = *end == '\0'; + char *name = p; + char *name_end = strchr(name, '\t'); + if (name_end) { + *name_end = '\0'; + char *filename = name_end + 1; + char *filename_end = strchr(filename, '\t'); + if (filename_end) { + *filename_end = '\0'; + char *address = filename_end + 1; + char *address_end = address; + int backslashes = 0; + while (1) { + bool is_end = false; + switch (*address_end) { + case '\n': + case '\r': + is_end = true; + break; + case '\\': + ++backslashes; + break; + case '/': + if (address_end != address && backslashes % 2 == 0) + is_end = true; + break; + } + if (is_end) break; + if (*address_end != '\\') backslashes = 0; + ++address_end; + } + *address_end = '\0'; + if (address_end - address > 2 && address_end[-2] == ';' && address_end[-1] == '"') { + address_end[-2] = '\0'; + } + Tag tag = {.name = name, .file = filename, .address = address}; + arr_add(f->tags, tag); + } + } + if (eof) break; // end of file + p = end + 1; + } + } + f->last_modified = time_last_modified(tags_filename); + fclose(file); + } else { + ted_seterr(ted, "tags file does not exist."); + } +} + +void tags_read_if_changed(Ted *ted, TagsFile *f) { + Settings const *settings = &ted->settings; + char const *tags_filename = settings->tags_filename; + struct timespec modify_time = time_last_modified(tags_filename); + if (!timespec_eq(modify_time, f->last_modified)) { + tags_read(ted, f); + } +}
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