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Diffstat (limited to 'examples/dte/config.c')
| -rw-r--r-- | examples/dte/config.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/examples/dte/config.c b/examples/dte/config.c new file mode 100644 index 0000000..dd24465 --- /dev/null +++ b/examples/dte/config.c @@ -0,0 +1,185 @@ +#include <errno.h> +#include <stdbool.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include "config.h" +#include "commands.h" +#include "editor.h" +#include "error.h" +#include "syntax/color.h" +#include "util/debug.h" +#include "util/readfile.h" +#include "util/str-util.h" +#include "../build/builtin-config.h" + +ConfigState current_config; + +// Odd number of backslashes at end of line? +static bool has_line_continuation(StringView line) +{ + ssize_t pos = line.length - 1; + while (pos >= 0 && line.data[pos] == '\\') { + pos--; + } + return (line.length - 1 - pos) & 1; +} + +UNITTEST { + BUG_ON(has_line_continuation(string_view(NULL, 0))); + BUG_ON(has_line_continuation(strview_from_cstring("0"))); + BUG_ON(!has_line_continuation(strview_from_cstring("1 \\"))); + BUG_ON(has_line_continuation(strview_from_cstring("2 \\\\"))); + BUG_ON(!has_line_continuation(strview_from_cstring("3 \\\\\\"))); + BUG_ON(has_line_continuation(strview_from_cstring("4 \\\\\\\\"))); +} + +void exec_config(CommandRunner *runner, StringView config) +{ + String buf = string_new(1024); + + for (size_t i = 0, n = config.length; i < n; current_config.line++) { + StringView line = buf_slice_next_line(config.data, &i, n); + strview_trim_left(&line); + if (buf.len == 0 && strview_has_prefix(&line, "#")) { + // Comment line + continue; + } + if (has_line_continuation(line)) { + line.length--; + string_append_strview(&buf, &line); + } else { + string_append_strview(&buf, &line); + handle_command(runner, string_borrow_cstring(&buf)); + string_clear(&buf); + } + } + + if (unlikely(buf.len)) { + // This can only happen if the last line had a line continuation + handle_command(runner, string_borrow_cstring(&buf)); + } + + string_free(&buf); +} + +String dump_builtin_configs(void) +{ + String str = string_new(1024); + for (size_t i = 0; i < ARRAYLEN(builtin_configs); i++) { + string_append_cstring(&str, builtin_configs[i].name); + string_append_byte(&str, '\n'); + } + return str; +} + +const BuiltinConfig *get_builtin_config(const char *name) +{ + for (size_t i = 0; i < ARRAYLEN(builtin_configs); i++) { + if (streq(name, builtin_configs[i].name)) { + return &builtin_configs[i]; + } + } + return NULL; +} + +const BuiltinConfig *get_builtin_configs_array(size_t *nconfigs) +{ + *nconfigs = ARRAYLEN(builtin_configs); + return &builtin_configs[0]; +} + +int do_read_config(CommandRunner *runner, const char *filename, ConfigFlags flags) +{ + const bool must_exist = flags & CFG_MUST_EXIST; + const bool builtin = flags & CFG_BUILTIN; + + if (builtin) { + const BuiltinConfig *cfg = get_builtin_config(filename); + int err = 0; + if (cfg) { + current_config.file = filename; + current_config.line = 1; + exec_config(runner, cfg->text); + } else if (must_exist) { + error_msg ( + "Error reading '%s': no built-in config exists for that path", + filename + ); + err = 1; + } + return err; + } + + char *buf; + ssize_t size = read_file(filename, &buf); + if (size < 0) { + int err = errno; + if (err != ENOENT || must_exist) { + error_msg("Error reading %s: %s", filename, strerror(err)); + } + return err; + } + + current_config.file = filename; + current_config.line = 1; + exec_config(runner, string_view(buf, size)); + free(buf); + return 0; +} + +int read_config(CommandRunner *runner, const char *filename, ConfigFlags flags) +{ + // Recursive + const ConfigState saved = current_config; + int ret = do_read_config(runner, filename, flags); + current_config = saved; + return ret; +} + +void exec_builtin_color_reset(EditorState *e) +{ + clear_hl_colors(&e->colors); + const StringView reset = string_view(builtin_color_reset, sizeof(builtin_color_reset) - 1); + const ConfigState saved = current_config; + current_config.file = "color/reset"; + current_config.line = 1; + exec_normal_config(e, reset); + current_config = saved; +} + +void exec_builtin_rc(EditorState *e) +{ + exec_builtin_color_reset(e); + const StringView rc = string_view(builtin_rc, sizeof(builtin_rc) - 1); + const ConfigState saved = current_config; + current_config.file = "rc"; + current_config.line = 1; + exec_normal_config(e, rc); + current_config = saved; +} + +void collect_builtin_configs(PointerArray *a, const char *prefix) +{ + for (size_t i = 0; i < ARRAYLEN(builtin_configs); i++) { + const char *name = builtin_configs[i].name; + if (str_has_prefix(name, prefix)) { + ptr_array_append(a, xstrdup(name)); + } + } +} + +void collect_builtin_includes(PointerArray *a, const char *prefix) +{ + for (size_t i = 0; i < ARRAYLEN(builtin_configs); i++) { + const char *name = builtin_configs[i].name; + if (str_has_prefix(name, prefix) && !str_has_prefix(name, "syntax/")) { + ptr_array_append(a, xstrdup(name)); + } + } +} + +UNITTEST { + BUG_ON(!get_builtin_config("rc")); + BUG_ON(!get_builtin_config("color/reset")); +} |