diff options
Diffstat (limited to 'src/utils.c')
| -rw-r--r-- | src/utils.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/utils.c b/src/utils.c index 109aac08..32ea87c3 100644 --- a/src/utils.c +++ b/src/utils.c @@ -554,4 +554,42 @@ const char *osmo_escape_str(const char *str, int in_len) return osmo_escape_str_buf(str, in_len, namebuf, sizeof(namebuf)); } +/*! Like osmo_escape_str(), but returns double-quotes around a string, or "NULL" for a NULL string. + * This allows passing any char* value and get its C representation as string. + * \param[in] str A string that may contain any characters. + * \param[in] len Pass -1 to print until nul char, or >= 0 to force a length. + * \returns buf containing an escaped representation, possibly truncated, or str itself. + */ +const char *osmo_quote_str_buf(const char *str, int in_len, char *buf, size_t bufsize) +{ + const char *res; + int l; + if (!str) + return "NULL"; + if (bufsize < 3) + return "<buf-too-small>"; + buf[0] = '"'; + res = osmo_escape_str_buf(str, in_len, buf + 1, bufsize - 2); + /* if osmo_escape_str_buf() returned the str itself, we need to copy it to buf to be able to + * quote it. */ + if (res == str) { + /* max_len = bufsize - two quotes - nul term */ + int max_len = bufsize - 2 - 1; + if (in_len >= 0) + max_len = OSMO_MIN(in_len, max_len); + /* It is not allowed to pass unterminated strings into osmo_strlcpy() :/ */ + strncpy(buf + 1, str, max_len); + buf[1 + max_len] = '\0'; + } + l = strlen(buf); + buf[l] = '"'; + buf[l+1] = '\0'; /* both osmo_escape_str_buf() and max_len above ensure room for '\0' */ + return buf; +} + +const char *osmo_quote_str(const char *str, int in_len) +{ + return osmo_quote_str_buf(str, in_len, namebuf, sizeof(namebuf)); +} + /*! @} */ |