diff options
| -rw-r--r-- | payloads/libpayload/include/libpayload.h | 8 | ||||
| -rw-r--r-- | payloads/libpayload/libc/string.c | 77 |
2 files changed, 85 insertions, 0 deletions
diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h index b9ced58064..9ad3c82dd1 100644 --- a/payloads/libpayload/include/libpayload.h +++ b/payloads/libpayload/include/libpayload.h @@ -110,6 +110,13 @@ void rtc_read_clock(struct tm *tm); /** @} */ /** + * @defgroup usb USB functions + * @{ + */ +int usb_initialize(void); +/** @} */ + +/** * @defgroup input Device functions * @{ @} */ @@ -315,6 +322,7 @@ char *strncat(char *d, const char *s, size_t n); char *strchr(const char *s, int c); char *strdup(const char *s); char *strstr(const char *h, const char *n); +char *strsep(char **stringp, const char *delim); /** @} */ /** diff --git a/payloads/libpayload/libc/string.c b/payloads/libpayload/libc/string.c index 85315b13ea..9d196f2e09 100644 --- a/payloads/libpayload/libc/string.c +++ b/payloads/libpayload/libc/string.c @@ -128,6 +128,14 @@ int strncmp(const char *s1, const char *s2, size_t maxlen) return 0; } +/** + * Copy a string with a maximum length. + * + * @param d The destination memory. + * @param s The source string. + * @param n Copy at most n characters as length of the string. + * @return A pointer to the destination memory. + */ char *strncpy(char *d, const char *s, size_t n) { /* Use +1 to get the NUL terminator. */ @@ -140,11 +148,26 @@ char *strncpy(char *d, const char *s, size_t n) return d; } +/** + * Copy a string. + * + * @param d The destination memory. + * @param s The source string. + * @return A pointer to the destination memory. + */ char *strcpy(char *d, const char *s) { return strncpy(d, s, strlen(s) + 1); } +/** + * Concatenates two strings with a maximum length. + * + * @param d The destination string. + * @param s The source string. + * @param n The target string will have a length of n characters at most. + * @return A pointer to the destination string. + */ char *strncat(char *d, const char *s, size_t n) { char *p = d + strlen(d); @@ -158,6 +181,14 @@ char *strncat(char *d, const char *s, size_t n) return d; } +/** + * Find a character in a string. + * + * @param s The string. + * @param c The character. + * @return A pointer to the first occurence of the character in the + * string, or NULL if the character was not encountered within the string. + */ char *strchr(const char *s, int c) { char *p = (char *)s; @@ -170,6 +201,12 @@ char *strchr(const char *s, int c) return NULL; } +/** + * Duplicate a string. + * + * @param s The string to duplicate. + * @return A pointer to the copy of the original string. + */ char *strdup(const char *s) { int n = strlen(s); @@ -182,6 +219,14 @@ char *strdup(const char *s) return p; } +/** + * Find a substring within a string. + * + * @param h The haystack string. + * @param n The needle string (substring). + * @return A pointer to the first occurence of the substring in + * the string, or NULL if the substring was not encountered within the string. + */ char *strstr(const char *h, const char *n) { int hn = strlen(h); @@ -194,3 +239,35 @@ char *strstr(const char *h, const char *n) return NULL; } + +/** + * Separate strings. + * + * @param stringp reference of the string to separate. + * @param delim string containing all delimiters. + * @return Token string. + */ +char *strsep(char **stringp, const char *delim) +{ + char *walk, *token; + + if (!stringp || !*stringp || !**stringp) + return NULL; + + token = walk = *stringp; + + /* Walk, search for delimiters */ + while(*walk && !strchr(delim, *walk)) + walk++; + + if (*walk) { + /* NUL terminate */ + *walk = '\0'; + walk++; + } + + *stringp = walk; + + return token; +} + |