neels has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/27025 ) Change subject: add osmo_quote_str_buf3, osmo_escape_str_buf3 ...................................................................... add osmo_quote_str_buf3, osmo_escape_str_buf3 There already are osmo_quote_str_buf() and osmo_quote_str_buf2(), same for _escape_, but none of them return the snprintf() like string length. A private function does, publish this in the API. The returned chars_needed is required to accurately allocate sufficient size in string functions that call osmo_quote_str/osmo_escape_str. I am adding such in osmo-upf.git. Related: SYS#5599 Change-Id: I05d75a40599e3133da099a11e8babaaad0e9493a --- M include/osmocom/core/utils.h M src/utils.c 2 files changed, 29 insertions(+), 1 deletion(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/25/27025/1 diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h index 327aa3d..eda0e39 100644 --- a/include/osmocom/core/utils.h +++ b/include/osmocom/core/utils.h @@ -157,10 +157,12 @@ char *osmo_quote_cstr_c(void *ctx, const char *str, int in_len); const char *osmo_escape_str(const char *str, int len); +int osmo_escape_str_buf3(char *buf, size_t bufsize, const char *str, int in_len); char *osmo_escape_str_buf2(char *buf, size_t bufsize, const char *str, int in_len); const char *osmo_escape_str_buf(const char *str, int in_len, char *buf, size_t bufsize); char *osmo_escape_str_c(const void *ctx, const char *str, int in_len); const char *osmo_quote_str(const char *str, int in_len); +int osmo_quote_str_buf3(char *buf, size_t bufsize, const char *str, int in_len); char *osmo_quote_str_buf2(char *buf, size_t bufsize, const char *str, int in_len); const char *osmo_quote_str_buf(const char *str, int in_len, char *buf, size_t bufsize); char *osmo_quote_str_c(const void *ctx, const char *str, int in_len); diff --git a/src/utils.c b/src/utils.c index 357ed53..2012b74 100644 --- a/src/utils.c +++ b/src/utils.c @@ -754,7 +754,7 @@ * the non-legacy format also escapes those as "\xNN" sequences. * \return Number of characters that would be written if bufsize were large enough excluding '\0' (like snprintf()). */ -static size_t _osmo_escape_str_buf(char *buf, size_t bufsize, const char *str, int in_len, bool legacy_format) +static int _osmo_escape_str_buf(char *buf, size_t bufsize, const char *str, int in_len, bool legacy_format) { struct osmo_strbuf sb = { .buf = buf, .len = bufsize }; int in_pos = 0; @@ -826,6 +826,18 @@ * \param[in] bufsize sizeof(buf). * \param[in] str A string that may contain any characters. * \param[in] in_len Pass -1 to print until nul char, or >= 0 to force a length (also past nul chars). + * \return Number of characters that would be written if bufsize were large enough excluding '\0' (like snprintf()). + */ +int osmo_escape_str_buf3(char *buf, size_t bufsize, const char *str, int in_len) +{ + return _osmo_escape_str_buf(buf, bufsize, str, in_len, false); +} + +/*! Return the string with all non-printable characters escaped. + * \param[out] buf string buffer to write escaped characters to. + * \param[in] bufsize sizeof(buf). + * \param[in] str A string that may contain any characters. + * \param[in] in_len Pass -1 to print until nul char, or >= 0 to force a length (also past nul chars). * \return The output buffer (buf). */ char *osmo_escape_str_buf2(char *buf, size_t bufsize, const char *str, int in_len) @@ -883,6 +895,20 @@ return sb.chars_needed; } +/*! Like osmo_escape_str_buf3(), 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. + * The function signature is suitable for OSMO_STRBUF_APPEND_NOLEN(). + * \param[out] buf string buffer to write escaped characters to. + * \param[in] bufsize sizeof(buf). + * \param[in] str A string that may contain any characters. + * \param[in] in_len Pass -1 to print until nul char, or >= 0 to force a length. + * \return Number of characters that would be written if bufsize were large enough excluding '\0' (like snprintf()). + */ +int osmo_quote_str_buf3(char *buf, size_t bufsize, const char *str, int in_len) +{ + return _osmo_quote_str_buf(buf, bufsize, str, in_len, false); +} + /*! Like osmo_escape_str_buf2(), 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. * The function signature is suitable for OSMO_STRBUF_APPEND_NOLEN(). -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/27025 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I05d75a40599e3133da099a11e8babaaad0e9493a Gerrit-Change-Number: 27025 Gerrit-PatchSet: 1 Gerrit-Owner: neels <nhofmeyr(a)sysmocom.de> Gerrit-MessageType: newchange