diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/string.c | 90 |
1 files changed, 30 insertions, 60 deletions
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c index 2553e5b55b89..d87767f76903 100644 --- a/tools/perf/util/string.c +++ b/tools/perf/util/string.c @@ -9,78 +9,48 @@ */ s64 perf_atoll(const char *str) { - unsigned int i; - s64 length = -1, unit = 1; + s64 length; + char *p; + char c; if (!isdigit(str[0])) goto out_err; - for (i = 1; i < strlen(str); i++) { - switch (str[i]) { - case 'B': - case 'b': - break; - case 'K': - if (str[i + 1] != 'B') - goto out_err; - else - goto kilo; - case 'k': - if (str[i + 1] != 'b') - goto out_err; -kilo: - unit = K; - break; - case 'M': - if (str[i + 1] != 'B') - goto out_err; - else - goto mega; - case 'm': - if (str[i + 1] != 'b') + length = strtoll(str, &p, 10); + switch (c = *p++) { + case 'b': case 'B': + if (*p) goto out_err; -mega: - unit = K * K; + case '\0': + return length; + default: + goto out_err; + /* two-letter suffices */ + case 'k': case 'K': + length <<= 10; break; - case 'G': - if (str[i + 1] != 'B') - goto out_err; - else - goto giga; - case 'g': - if (str[i + 1] != 'b') - goto out_err; -giga: - unit = K * K * K; + case 'm': case 'M': + length <<= 20; break; - case 'T': - if (str[i + 1] != 'B') - goto out_err; - else - goto tera; - case 't': - if (str[i + 1] != 'b') - goto out_err; -tera: - unit = K * K * K * K; + case 'g': case 'G': + length <<= 30; break; - case '\0': /* only specified figures */ - unit = 1; + case 't': case 'T': + length <<= 40; break; - default: - if (!isdigit(str[i])) - goto out_err; - break; - } } - - length = atoll(str) * unit; - goto out; + /* we want the cases to match */ + if (islower(c)) { + if (strcmp(p, "b") != 0) + goto out_err; + } else { + if (strcmp(p, "B") != 0) + goto out_err; + } + return length; out_err: - length = -1; -out: - return length; + return -1; } /* |