Commit-ID: d02fc6bcd53721cf8588633409157c232f2418e0 Gitweb: http://git.kernel.org/tip/d02fc6bcd53721cf8588633409157c232f2418e0 Author: Andi Kleen <[email protected]> AuthorDate: Tue, 3 Jan 2017 07:08:23 -0800 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Mon, 16 Jan 2017 14:59:15 -0300
perf pmu: Factor out scale conversion code Move the scale factor parsing code to an own function to reuse it in an upcoming patch. v2: Return error in case strdup returns NULL. Signed-off-by: Andi Kleen <[email protected]> Acked-by: Jiri Olsa <[email protected]> Link: http://lkml.kernel.org/r/[email protected] [ Keep returning -ENOMEM when strdup() fails in perf_pmu__parse_scale()/convert_scale() ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/util/pmu.c | 62 ++++++++++++++++++++++++++++----------------------- 1 file changed, 34 insertions(+), 28 deletions(-) diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index dc6ccaa..78b1610 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -94,32 +94,10 @@ static int pmu_format(const char *name, struct list_head *format) return 0; } -static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name) +static int convert_scale(const char *scale, char **end, double *sval) { - struct stat st; - ssize_t sret; - char scale[128]; - int fd, ret = -1; - char path[PATH_MAX]; char *lc; - - snprintf(path, PATH_MAX, "%s/%s.scale", dir, name); - - fd = open(path, O_RDONLY); - if (fd == -1) - return -1; - - if (fstat(fd, &st) < 0) - goto error; - - sret = read(fd, scale, sizeof(scale)-1); - if (sret < 0) - goto error; - - if (scale[sret - 1] == '\n') - scale[sret - 1] = '\0'; - else - scale[sret] = '\0'; + int ret = 0; /* * save current locale @@ -134,7 +112,7 @@ static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char * lc = strdup(lc); if (!lc) { ret = -ENOMEM; - goto error; + goto out; } /* @@ -144,14 +122,42 @@ static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char * */ setlocale(LC_NUMERIC, "C"); - alias->scale = strtod(scale, NULL); + *sval = strtod(scale, end); +out: /* restore locale */ setlocale(LC_NUMERIC, lc); - free(lc); + return ret; +} + +static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name) +{ + struct stat st; + ssize_t sret; + char scale[128]; + int fd, ret = -1; + char path[PATH_MAX]; + + snprintf(path, PATH_MAX, "%s/%s.scale", dir, name); + + fd = open(path, O_RDONLY); + if (fd == -1) + return -1; + + if (fstat(fd, &st) < 0) + goto error; + + sret = read(fd, scale, sizeof(scale)-1); + if (sret < 0) + goto error; + + if (scale[sret - 1] == '\n') + scale[sret - 1] = '\0'; + else + scale[sret] = '\0'; - ret = 0; + ret = convert_scale(scale, NULL, &alias->scale); error: close(fd); return ret;
