diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2017-12-08 19:28:41 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-12-27 18:15:55 +0300 |
| commit | 1e9f9e8af0de80e8f6a47d991df66090934be0c6 (patch) | |
| tree | e433752cf8555c3723024f669620f743e934b6b1 /tools/perf | |
| parent | 4b3a2716dd785fabb9f6ac80c1d53cb29a88169d (diff) | |
| download | linux-1e9f9e8af0de80e8f6a47d991df66090934be0c6.tar.xz | |
perf string: Add {strdup,strpbrk}_esc()
To support the special characters escaped by '\' in 'perf probe' event parser.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Acked-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: bhargavb <bhargavaramudu@gmail.com>
Cc: linux-rt-users@vger.kernel.org
Link: http://lkml.kernel.org/r/151275052163.24652.18205979384585484358.stgit@devbox
[ Split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/string.c | 46 | ||||
| -rw-r--r-- | tools/perf/util/string2.h | 2 |
2 files changed, 48 insertions, 0 deletions
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c index aaa08ee8c717..d8bfd0c4d2cb 100644 --- a/tools/perf/util/string.c +++ b/tools/perf/util/string.c @@ -396,3 +396,49 @@ out_err_overflow: free(expr); return NULL; } + +/* Like strpbrk(), but not break if it is right after a backslash (escaped) */ +char *strpbrk_esc(char *str, const char *stopset) +{ + char *ptr; + + do { + ptr = strpbrk(str, stopset); + if (ptr == str || + (ptr == str + 1 && *(ptr - 1) != '\\')) + break; + str = ptr + 1; + } while (ptr && *(ptr - 1) == '\\' && *(ptr - 2) != '\\'); + + return ptr; +} + +/* Like strdup, but do not copy a single backslash */ +char *strdup_esc(const char *str) +{ + char *s, *d, *p, *ret = strdup(str); + + if (!ret) + return NULL; + + d = strchr(ret, '\\'); + if (!d) + return ret; + + s = d + 1; + do { + if (*s == '\0') { + *d = '\0'; + break; + } + p = strchr(s + 1, '\\'); + if (p) { + memmove(d, s, p - s); + d += p - s; + s = p + 1; + } else + memmove(d, s, strlen(s) + 1); + } while (p); + + return ret; +} diff --git a/tools/perf/util/string2.h b/tools/perf/util/string2.h index ee14ca5451ab..4c68a09b97e8 100644 --- a/tools/perf/util/string2.h +++ b/tools/perf/util/string2.h @@ -39,5 +39,7 @@ static inline char *asprintf_expr_not_in_ints(const char *var, size_t nints, int return asprintf_expr_inout_ints(var, false, nints, ints); } +char *strpbrk_esc(char *str, const char *stopset); +char *strdup_esc(const char *str); #endif /* PERF_STRING_H */ |