| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include <stdlib.h> | ||
| 2 | #include <string.h> | ||
| 3 | #include "cache.h" | ||
| 4 | #include "args.h" | ||
| 5 | #include "parse.h" | ||
| 6 | #include "trace.h" | ||
| 7 | #include "util/log.h" | ||
| 8 | #include "util/ptr-array.h" | ||
| 9 | #include "util/str-array.h" | ||
| 10 | #include "util/xmalloc.h" | ||
| 11 | |||
| 12 | // Takes a command string and returns a struct containing the resolved | ||
| 13 | // Command and pre-parsed arguments, or a NULL Command if uncacheable. | ||
| 14 | // In both cases, CachedCommand::cmd_str is filled with a copy of the | ||
| 15 | // original string. This caching is done to allow handle_binding() to | ||
| 16 | // avoid repeated parsing/allocation each time a key binding is used. | ||
| 17 | 1385 | CachedCommand *cached_command_new(const CommandRunner *runner, const char *cmd_str) | |
| 18 | { | ||
| 19 | 1385 | const size_t cmd_str_len = strlen(cmd_str); | |
| 20 | 1385 | CachedCommand *cached = xmalloc(sizeof(*cached) + cmd_str_len + 1); | |
| 21 | 1385 | memcpy(cached->cmd_str, cmd_str, cmd_str_len + 1); | |
| 22 | |||
| 23 | 1385 | const char *reason; | |
| 24 | 1385 | PointerArray array = PTR_ARRAY_INIT; | |
| 25 |
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1385 | if (parse_commands(runner, &array, cmd_str) != CMDERR_NONE) { |
| 26 | 3 | reason = "parsing failed"; | |
| 27 | 3 | goto nocache; | |
| 28 | } | ||
| 29 | |||
| 30 | 1382 | ptr_array_trim_nulls(&array); | |
| 31 | 1382 | size_t n = array.count; | |
| 32 |
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1382 | if (n < 2 || ptr_array_xindex(&array, NULL) != n - 1) { |
| 33 | 2 | reason = "multiple commands"; | |
| 34 | 2 | goto nocache; | |
| 35 | } | ||
| 36 | |||
| 37 | 1380 | const Command *cmd = runner->cmds->lookup(array.ptrs[0]); | |
| 38 |
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1380 | if (!cmd) { |
| 39 | // Aliases and non-existent commands can't be cached, because the | ||
| 40 | // command they expand to could later be invalidated by cmd_alias(). | ||
| 41 | 8 | reason = "contains aliases"; | |
| 42 | 8 | goto nocache; | |
| 43 | } | ||
| 44 | |||
| 45 | // TODO: Make this condition more precise | ||
| 46 |
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1372 | if (memchr(cmd_str, '$', cmd_str_len)) { |
| 47 | 1 | reason = "may contain variables"; | |
| 48 | 1 | goto nocache; | |
| 49 | } | ||
| 50 | |||
| 51 | 1371 | free(ptr_array_remove_index(&array, 0)); | |
| 52 | 1371 | CommandArgs cmdargs = cmdargs_new((char**)array.ptrs); | |
| 53 |
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1371 | if (do_parse_args(cmd, &cmdargs) != ARGERR_NONE) { |
| 54 | 3 | reason = "argument parsing failed"; | |
| 55 | 3 | goto nocache; | |
| 56 | } | ||
| 57 | |||
| 58 | // Command can be cached; cache takes ownership of args array | ||
| 59 | 1368 | cached->cmd = cmd; | |
| 60 | 1368 | cached->a = cmdargs; | |
| 61 | 1368 | return cached; | |
| 62 | |||
| 63 | 17 | nocache: | |
| 64 | 17 | TRACE_CMD("skipping command cache (%s): %s", reason, cmd_str); | |
| 65 | 17 | ptr_array_free(&array); | |
| 66 | 17 | cached->cmd = NULL; | |
| 67 | 17 | return cached; | |
| 68 | } | ||
| 69 | |||
| 70 | 2760 | void cached_command_free(CachedCommand *cc) | |
| 71 | { | ||
| 72 |
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2760 | if (!cc) { |
| 73 | return; | ||
| 74 | } | ||
| 75 |
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1385 | if (cc->cmd) { |
| 76 | 1368 | free_string_array(cc->a.args); | |
| 77 | } | ||
| 78 | 1385 | free(cc); | |
| 79 | } | ||
| 80 |