open62541/examples/common.h

/* This work is licensed under a Creative Commons CCZero 1.0 Universal License.
 * See http://creativecommons.org/publicdomain/zero/1.0/ for more information. */

/* loadFile parses the certificate file.
 *
 * @param  path               specifies the file name given in argv[]
 * @return Returns the file content after parsing */
static UA_INLINE UA_ByteString
loadFile(const char *const path) {
    UA_ByteString fileContents = UA_STRING_NULL;

    /* Open the file */
    FILE *fp = fopen(path, "rb");
    if(!fp) {
        errno = 0; /* We read errno also from the tcp layer... */
        return fileContents;
    }

    /* Get the file length, allocate the data and read */
    fseek(fp, 0, SEEK_END);
    fileContents.length = (size_t)ftell(fp);
    fileContents.data = (UA_Byte *)UA_malloc(fileContents.length * sizeof(UA_Byte));
    if(fileContents.data) {
        fseek(fp, 0, SEEK_SET);
        size_t read = fread(fileContents.data, sizeof(UA_Byte), fileContents.length, fp);
        if(read != fileContents.length)
            UA_ByteString_deleteMembers(&fileContents);
    } else {
        fileContents.length = 0;
    }
    fclose(fp);

    return fileContents;
}