Implement utils_parse_unsigned_long_long

[lttng-tools.git] / src / common / utils.c

diff --git a/src/common/utils.c b/src/common/utils.c
index bd61fff3d52ad8c6c16d68b0ca9e195009225018..134d2054fbde1ea74de3a8562c93c13067bfcf53 100644 (file)
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -1669,3 +1669,39 @@ end:
        free(buf);
        return ret_val;
 }
+
+LTTNG_HIDDEN
+int utils_parse_unsigned_long_long(const char *str,
+               unsigned long long *value)
+{
+       int ret;
+       char *endptr;
+
+       assert(str);
+       assert(value);
+
+       errno = 0;
+       *value = strtoull(str, &endptr, 10);
+
+       /* Conversion failed. Out of range? */
+       if (errno != 0) {
+               /* Don't print an error; allow the caller to log a better error. */
+               DBG("Failed to parse string as unsigned long long number: string = '%s', errno = %d",
+                               str, errno);
+               ret = -1;
+               goto end;
+       }
+
+       /* Not the end of the string or empty string. */
+       if (*endptr || endptr == str) {
+               DBG("Failed to parse string as unsigned long long number: string = '%s'",
+                               str);
+               ret = -1;
+               goto end;
+       }
+
+       ret = 0;
+
+end:
+       return ret;
+}