diff options
| -rw-r--r-- | src/vendorcode/google/chromeos/cros_vpd.c | 26 | ||||
| -rw-r--r-- | src/vendorcode/google/chromeos/cros_vpd.h | 16 |
2 files changed, 37 insertions, 5 deletions
diff --git a/src/vendorcode/google/chromeos/cros_vpd.c b/src/vendorcode/google/chromeos/cros_vpd.c index df2b5bf667..c0e483019b 100644 --- a/src/vendorcode/google/chromeos/cros_vpd.c +++ b/src/vendorcode/google/chromeos/cros_vpd.c @@ -99,7 +99,7 @@ static int vpd_gets_callback(const uint8_t *key, int32_t key_len, return VPD_FAIL; } -char *cros_vpd_gets(const char *key, char *buffer, int size) +const void *cros_vpd_find(const char *key, int *size) { uint8_t *vpd_address = NULL; int32_t vpd_size = 0; @@ -121,10 +121,26 @@ char *cros_vpd_gets(const char *key, char *buffer, int size) if (!arg.matched) return NULL; - if (size < arg.value_len + 1) - size = arg.value_len + 1; - memcpy(buffer, arg.value, size - 1); - buffer[size - 1] = '\0'; + *size = arg.value_len; + return arg.value; +} + +char *cros_vpd_gets(const char *key, char *buffer, int size) +{ + const void *string_address; + int string_size; + + string_address = cros_vpd_find(key, &string_size); + + if (!string_address) + return NULL; + + if (size > (string_size + 1)) { + strcpy(buffer, string_address); + } else { + memcpy(buffer, string_address, size - 1); + buffer[size - 1] = '\0'; + } return buffer; } diff --git a/src/vendorcode/google/chromeos/cros_vpd.h b/src/vendorcode/google/chromeos/cros_vpd.h index 674dbf65d9..19658c2940 100644 --- a/src/vendorcode/google/chromeos/cros_vpd.h +++ b/src/vendorcode/google/chromeos/cros_vpd.h @@ -18,4 +18,20 @@ */ char *cros_vpd_gets(const char *key, char *buffer, int size); +/* + * Find VPD value by key. + * + * Searches for a VPD entry in the VPD cache. If found, places the size of the + * entry into '*size' and returns the pointer to the entry data. + * + * This function presumes that VPD is cached in DRAM (which is the case in the + * current implementation) and as such returns the pointer into the cache. The + * user is not supposed to modify the data, and does not have to free the + * memory. + * + * Returns NULL if key is not found. + */ + +const void *cros_vpd_find(const char *key, int *size); + #endif /* __CROS_VPD_H__ */ |