diff options
Diffstat (limited to 'examples/dte/exec.c')
| -rw-r--r-- | examples/dte/exec.c | 366 |
1 files changed, 0 insertions, 366 deletions
diff --git a/examples/dte/exec.c b/examples/dte/exec.c deleted file mode 100644 index 416a2ef..0000000 --- a/examples/dte/exec.c +++ /dev/null @@ -1,366 +0,0 @@ -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include "exec.h" -#include "block-iter.h" -#include "buffer.h" -#include "change.h" -#include "command/macro.h" -#include "commands.h" -#include "ctags.h" -#include "error.h" -#include "misc.h" -#include "move.h" -#include "msg.h" -#include "selection.h" -#include "show.h" -#include "tag.h" -#include "util/bsearch.h" -#include "util/debug.h" -#include "util/numtostr.h" -#include "util/ptr-array.h" -#include "util/str-util.h" -#include "util/string-view.h" -#include "util/string.h" -#include "util/strtonum.h" -#include "util/xsnprintf.h" -#include "view.h" -#include "window.h" - -enum { - IN = 1 << 0, - OUT = 1 << 1, - ERR = 1 << 2, - ALL = IN | OUT | ERR, -}; - -static const struct { - char name[8]; - uint8_t flags; -} exec_map[] = { - [EXEC_BUFFER] = {"buffer", IN | OUT}, - [EXEC_COMMAND] = {"command", IN}, - [EXEC_ERRMSG] = {"errmsg", ERR}, - [EXEC_EVAL] = {"eval", OUT}, - [EXEC_LINE] = {"line", IN}, - [EXEC_MSG] = {"msg", IN | OUT}, - [EXEC_NULL] = {"null", ALL}, - [EXEC_OPEN] = {"open", OUT}, - [EXEC_SEARCH] = {"search", IN}, - [EXEC_TAG] = {"tag", OUT}, - [EXEC_TTY] = {"tty", ALL}, - [EXEC_WORD] = {"word", IN}, -}; - -UNITTEST { - CHECK_BSEARCH_ARRAY(exec_map, name, strcmp); -} - -ExecAction lookup_exec_action(const char *name, int fd) -{ - BUG_ON(fd < 0 || fd > 2); - ssize_t i = BSEARCH_IDX(name, exec_map, vstrcmp); - return (i >= 0 && (exec_map[i].flags & 1u << fd)) ? i : EXEC_INVALID; -} - -static void open_files_from_string(EditorState *e, const String *str) -{ - PointerArray filenames = PTR_ARRAY_INIT; - for (size_t pos = 0, size = str->len; pos < size; ) { - char *filename = buf_next_line(str->buffer, &pos, size); - if (filename[0] != '\0') { - ptr_array_append(&filenames, filename); - } - } - - if (filenames.count == 0) { - return; - } - - ptr_array_append(&filenames, NULL); - window_open_files(e->window, (char**)filenames.ptrs, NULL); - - // TODO: re-enable this when the todo in allow_macro_recording() is done - // macro_command_hook(&e->macro, "open", (char**)filenames.ptrs); - - ptr_array_free_array(&filenames); -} - -static void parse_and_activate_message(EditorState *e, const String *str) -{ - MessageArray *msgs = &e->messages; - size_t count = msgs->array.count; - size_t x; - if (!count || !buf_parse_size(str->buffer, str->len, &x) || !x) { - return; - } - msgs->pos = MIN(x - 1, count - 1); - activate_current_message(e); -} - -static void parse_and_goto_tag(EditorState *e, const String *str) -{ - if (unlikely(str->len == 0)) { - error_msg("child produced no output"); - return; - } - - Tag tag; - size_t pos = 0; - StringView line = buf_slice_next_line(str->buffer, &pos, str->len); - if (pos == 0) { - return; - } - - if (!parse_ctags_line(&tag, line.data, line.length)) { - // Treat line as simple tag name - tag_lookup(&e->tagfile, &line, e->buffer->abs_filename, &e->messages); - goto activate; - } - - char buf[8192]; - const char *cwd = getcwd(buf, sizeof buf); - if (unlikely(!cwd)) { - error_msg_errno("getcwd() failed"); - return; - } - - StringView dir = strview_from_cstring(cwd); - clear_messages(&e->messages); - add_message_for_tag(&e->messages, &tag, &dir); - -activate: - activate_current_message_save(e); -} - -static const char **lines_and_columns_env(const Window *window) -{ - static char lines[DECIMAL_STR_MAX(window->edit_h)]; - static char columns[DECIMAL_STR_MAX(window->edit_w)]; - static const char *vars[] = { - "LINES", lines, - "COLUMNS", columns, - NULL, - }; - - buf_uint_to_str(window->edit_h, lines); - buf_uint_to_str(window->edit_w, columns); - return vars; -} - -static void show_spawn_error_msg(const String *errstr, int err) -{ - if (err <= 0) { - return; - } - - char msg[512]; - msg[0] = '\0'; - if (errstr->len) { - size_t pos = 0; - StringView line = buf_slice_next_line(errstr->buffer, &pos, errstr->len); - BUG_ON(pos == 0); - size_t len = MIN(line.length, sizeof(msg) - 8); - xsnprintf(msg, sizeof(msg), ": \"%.*s\"", (int)len, line.data); - } - - if (err >= 256) { - int sig = err >> 8; - const char *str = strsignal(sig); - error_msg("Child received signal %d (%s)%s", sig, str ? str : "??", msg); - } else if (err) { - error_msg("Child returned %d%s", err, msg); - } -} - -static SpawnAction spawn_action_from_exec_action(ExecAction action) -{ - BUG_ON(action == EXEC_INVALID); - if (action == EXEC_NULL) { - return SPAWN_NULL; - } else if (action == EXEC_TTY) { - return SPAWN_TTY; - } else { - return SPAWN_PIPE; - } -} - -ssize_t handle_exec ( - EditorState *e, - const char **argv, - ExecAction actions[3], - SpawnFlags spawn_flags, - bool strip_trailing_newline -) { - View *view = e->view; - const BlockIter saved_cursor = view->cursor; - const ssize_t saved_sel_so = view->sel_so; - const ssize_t saved_sel_eo = view->sel_eo; - char *alloc = NULL; - bool output_to_buffer = (actions[STDOUT_FILENO] == EXEC_BUFFER); - bool replace_input = false; - - SpawnContext ctx = { - .editor = e, - .argv = argv, - .outputs = {STRING_INIT, STRING_INIT}, - .flags = spawn_flags, - .env = output_to_buffer ? lines_and_columns_env(e->window) : NULL, - .actions = { - spawn_action_from_exec_action(actions[0]), - spawn_action_from_exec_action(actions[1]), - spawn_action_from_exec_action(actions[2]), - }, - }; - - switch (actions[STDIN_FILENO]) { - case EXEC_LINE: - if (view->selection) { - ctx.input.length = prepare_selection(view); - } else { - StringView line; - move_bol(view); - fill_line_ref(&view->cursor, &line); - ctx.input.length = line.length; - } - replace_input = true; - get_bytes: - alloc = block_iter_get_bytes(&view->cursor, ctx.input.length); - ctx.input.data = alloc; - break; - case EXEC_BUFFER: - if (view->selection) { - ctx.input.length = prepare_selection(view); - } else { - Block *blk; - block_for_each(blk, &view->buffer->blocks) { - ctx.input.length += blk->size; - } - move_bof(view); - } - replace_input = true; - goto get_bytes; - case EXEC_WORD: - if (view->selection) { - ctx.input.length = prepare_selection(view); - replace_input = true; - } else { - size_t offset; - StringView word = view_do_get_word_under_cursor(e->view, &offset); - if (word.length == 0) { - break; - } - // TODO: optimize this, so that the BlockIter moves by just the - // minimal word offset instead of iterating to a line offset - ctx.input.length = word.length; - move_bol(view); - view->cursor.offset += offset; - BUG_ON(view->cursor.offset >= view->cursor.blk->size); - } - goto get_bytes; - case EXEC_MSG: { - String messages = dump_messages(&e->messages); - ctx.input = strview_from_string(&messages), - alloc = messages.buffer; - break; - } - case EXEC_COMMAND: { - String hist = dump_command_history(e); - ctx.input = strview_from_string(&hist), - alloc = hist.buffer; - break; - } - case EXEC_SEARCH: { - String hist = dump_search_history(e); - ctx.input = strview_from_string(&hist), - alloc = hist.buffer; - break; - } - case EXEC_NULL: - case EXEC_TTY: - break; - // These can't be used as input actions and should be prevented by - // the validity checks in cmd_exec(): - case EXEC_OPEN: - case EXEC_TAG: - case EXEC_EVAL: - case EXEC_ERRMSG: - case EXEC_INVALID: - default: - BUG("unhandled action"); - return -1; - } - - int err = spawn(&ctx); - free(alloc); - if (err != 0) { - show_spawn_error_msg(&ctx.outputs[1], err); - string_free(&ctx.outputs[0]); - string_free(&ctx.outputs[1]); - view->cursor = saved_cursor; - return -1; - } - - string_free(&ctx.outputs[1]); - String *output = &ctx.outputs[0]; - if ( - strip_trailing_newline - && output_to_buffer - && output->len > 0 - && output->buffer[output->len - 1] == '\n' - ) { - output->len--; - if (output->len > 0 && output->buffer[output->len - 1] == '\r') { - output->len--; - } - } - - if (!output_to_buffer) { - view->cursor = saved_cursor; - view->sel_so = saved_sel_so; - view->sel_eo = saved_sel_eo; - mark_all_lines_changed(view->buffer); - } - - switch (actions[STDOUT_FILENO]) { - case EXEC_BUFFER: - if (replace_input || view->selection) { - size_t del_count = replace_input ? ctx.input.length : prepare_selection(view); - buffer_replace_bytes(view, del_count, output->buffer, output->len); - unselect(view); - } else { - buffer_insert_bytes(view, output->buffer, output->len); - } - break; - case EXEC_MSG: - parse_and_activate_message(e, output); - break; - case EXEC_OPEN: - open_files_from_string(e, output); - break; - case EXEC_TAG: - parse_and_goto_tag(e, output); - break; - case EXEC_EVAL: - exec_normal_config(e, strview_from_string(output)); - break; - case EXEC_NULL: - case EXEC_TTY: - break; - // These can't be used as output actions - case EXEC_COMMAND: - case EXEC_ERRMSG: - case EXEC_LINE: - case EXEC_SEARCH: - case EXEC_WORD: - case EXEC_INVALID: - default: - BUG("unhandled action"); - return -1; - } - - size_t output_len = output->len; - string_free(output); - return output_len; -} |