diff options
| -rw-r--r-- | include/osmocom/core/utils.h | 3 | ||||
| -rw-r--r-- | src/utils.c | 28 |
2 files changed, 31 insertions, 0 deletions
diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h index 4b083f6c..c5cc138b 100644 --- a/include/osmocom/core/utils.h +++ b/include/osmocom/core/utils.h @@ -22,6 +22,7 @@ /*! Number of bytes necessary to store given BITS */ #define OSMO_BYTES_FOR_BITS(BITS) ((BITS + 8 - 1) / 8) +#include <stdbool.h> #include <stdint.h> #include <stdio.h> @@ -112,4 +113,6 @@ size_t osmo_strlcpy(char *dst, const char *src, size_t siz); bool osmo_is_hexstr(const char *str, int min_digits, int max_digits, bool require_even); +bool osmo_identifier_valid(const char *str); + /*! @} */ diff --git a/src/utils.c b/src/utils.c index 534916b6..ef8e916e 100644 --- a/src/utils.c +++ b/src/utils.c @@ -22,6 +22,7 @@ */ +#include <stdbool.h> #include <string.h> #include <stdint.h> #include <errno.h> @@ -411,6 +412,33 @@ bool osmo_is_hexstr(const char *str, int min_digits, int max_digits, return false; if (require_even && (len & 1)) return false; + + return true; +} + +/*! Determine if a given identifier is valid, i.e. doesn't contain illegal chars + * \param[in] str String to validate + * \returns true in case string contains valid identifier, false otherwise + */ +bool osmo_identifier_valid(const char *str) +{ + /* characters that are illegal in names */ + static const char illegal_chars[] = "., {}[]()<>|~\\^`'\"?=;/+*&%$#!"; + unsigned int i; + + /* an empty string is not a valid identifier */ + if (!str || strlen(str) == 0) + return false; + + for (i = 0; i < strlen(str); i++) { + /* check for 7-bit ASCII */ + if (str[i] & 0x80) + return false; + /* check for some explicit reserved control characters */ + if (strchr(illegal_chars, str[i])) + return false; + } + return true; } |