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perf list: Allow wordwrap to wrap on commas

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A raw event encoding may be a block with terms separated by commas. If
wrapping such a string it would be useful to break at the commas, so
add this ability to wordwrap.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20240308001915.4060155-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2024-03-07 16:19:12 -08:00 committed by Arnaldo Carvalho de Melo
parent 39aa4ff61f
commit aa1f4ad287
1 changed files with 17 additions and 4 deletions
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21
tools/perf/builtin-list.c
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@ -22,6 +22,7 @@
#include <subcmd/pager.h>
#include <subcmd/parse-options.h>
#include <linux/zalloc.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
@ -76,26 +77,38 @@ static void default_print_start(void *ps)
static void default_print_end(void *print_state __maybe_unused) {}
static const char *skip_spaces_or_commas(const char *str)
{
while (isspace(*str) || *str == ',')
++str;
return str;
}
static void wordwrap(FILE *fp, const char *s, int start, int max, int corr)
{
int column = start;
int n;
bool saw_newline = false;
bool comma = false;
while (*s) {
int wlen = strcspn(s, " \t\n");
int wlen = strcspn(s, " ,\t\n");
const char *sep = comma ? "," : " ";
if ((column + wlen >= max && column > start) || saw_newline) {
fprintf(fp, "\n%*s", start, "");
fprintf(fp, comma ? ",\n%*s" : "\n%*s", start, "");
column = start + corr;
}
n = fprintf(fp, "%s%.*s", column > start ? " " : "", wlen, s);
if (column <= start)
sep = "";
n = fprintf(fp, "%s%.*s", sep, wlen, s);
if (n <= 0)
break;
saw_newline = s[wlen] == '\n';
s += wlen;
comma = s[0] == ',';
column += n;
s = skip_spaces(s);
s = skip_spaces_or_commas(s);
}
}