perf tools: Move help_unknown_cmd() to its own file
help_unknown_cmd() is quite perf-specific because it relies on some
perf_config*() functions. Move it and its supporting functions out into
a separate file so that help.c can be moved to a library.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/562d918bcaaf340c1ae3e47586b3f0ae33b9918b.1449965119.git.jpoimboe@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/help.c b/tools/perf/util/help.c
index 929c93f..8d74f7d 100644
--- a/tools/perf/util/help.c
+++ b/tools/perf/util/help.c
@@ -1,9 +1,7 @@
#include "cache.h"
#include "../builtin.h"
#include "exec_cmd.h"
-#include "levenshtein.h"
#include "help.h"
-#include <termios.h>
void add_cmdname(struct cmdnames *cmds, const char *name, size_t len)
{
@@ -17,7 +15,7 @@
cmds->names[cmds->cnt++] = ent;
}
-static void clean_cmdnames(struct cmdnames *cmds)
+void clean_cmdnames(struct cmdnames *cmds)
{
unsigned int i;
@@ -28,14 +26,14 @@
cmds->alloc = 0;
}
-static int cmdname_compare(const void *a_, const void *b_)
+int cmdname_compare(const void *a_, const void *b_)
{
struct cmdname *a = *(struct cmdname **)a_;
struct cmdname *b = *(struct cmdname **)b_;
return strcmp(a->name, b->name);
}
-static void uniq(struct cmdnames *cmds)
+void uniq(struct cmdnames *cmds)
{
unsigned int i, j;
@@ -233,102 +231,3 @@
return 1;
return 0;
}
-
-static int autocorrect;
-static struct cmdnames aliases;
-
-static int perf_unknown_cmd_config(const char *var, const char *value, void *cb)
-{
- if (!strcmp(var, "help.autocorrect"))
- autocorrect = perf_config_int(var,value);
- /* Also use aliases for command lookup */
- if (!prefixcmp(var, "alias."))
- add_cmdname(&aliases, var + 6, strlen(var + 6));
-
- return perf_default_config(var, value, cb);
-}
-
-static int levenshtein_compare(const void *p1, const void *p2)
-{
- const struct cmdname *const *c1 = p1, *const *c2 = p2;
- const char *s1 = (*c1)->name, *s2 = (*c2)->name;
- int l1 = (*c1)->len;
- int l2 = (*c2)->len;
- return l1 != l2 ? l1 - l2 : strcmp(s1, s2);
-}
-
-static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old)
-{
- unsigned int i;
-
- ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc);
-
- for (i = 0; i < old->cnt; i++)
- cmds->names[cmds->cnt++] = old->names[i];
- zfree(&old->names);
- old->cnt = 0;
-}
-
-const char *help_unknown_cmd(const char *cmd)
-{
- unsigned int i, n = 0, best_similarity = 0;
- struct cmdnames main_cmds, other_cmds;
-
- memset(&main_cmds, 0, sizeof(main_cmds));
- memset(&other_cmds, 0, sizeof(main_cmds));
- memset(&aliases, 0, sizeof(aliases));
-
- perf_config(perf_unknown_cmd_config, NULL);
-
- load_command_list("perf-", &main_cmds, &other_cmds);
-
- add_cmd_list(&main_cmds, &aliases);
- add_cmd_list(&main_cmds, &other_cmds);
- qsort(main_cmds.names, main_cmds.cnt,
- sizeof(main_cmds.names), cmdname_compare);
- uniq(&main_cmds);
-
- if (main_cmds.cnt) {
- /* This reuses cmdname->len for similarity index */
- for (i = 0; i < main_cmds.cnt; ++i)
- main_cmds.names[i]->len =
- levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4);
-
- qsort(main_cmds.names, main_cmds.cnt,
- sizeof(*main_cmds.names), levenshtein_compare);
-
- best_similarity = main_cmds.names[0]->len;
- n = 1;
- while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len)
- ++n;
- }
-
- if (autocorrect && n == 1) {
- const char *assumed = main_cmds.names[0]->name;
-
- main_cmds.names[0] = NULL;
- clean_cmdnames(&main_cmds);
- fprintf(stderr, "WARNING: You called a perf program named '%s', "
- "which does not exist.\n"
- "Continuing under the assumption that you meant '%s'\n",
- cmd, assumed);
- if (autocorrect > 0) {
- fprintf(stderr, "in %0.1f seconds automatically...\n",
- (float)autocorrect/10.0);
- poll(NULL, 0, autocorrect * 100);
- }
- return assumed;
- }
-
- fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd);
-
- if (main_cmds.cnt && best_similarity < 6) {
- fprintf(stderr, "\nDid you mean %s?\n",
- n < 2 ? "this": "one of these");
-
- for (i = 0; i < n; i++)
- fprintf(stderr, "\t%s\n", main_cmds.names[i]->name);
- }
-
- exit(1);
-}