Function stbi__hdr_gettoken

lite/example/cpp_example/mge/cv/stb_image.h:7769–7788

#define STBI__HDR_BUFLEN 1024
static char* stbi__hdr_gettoken(stbi__context* z, char* buffer) {
    int len = 0;
    char c = '\0';

    c = (char)stbi__get8(z);

    while (!stbi__at_eof(z) && c != '\n') {
        buffer[len++] = c;
        if (len == STBI__HDR_BUFLEN - 1) {
            // flush to end of line
            while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
                ;
            break;
        }
        c = (char)stbi__get8(z);
    }

    buffer[len] = 0;
    return buffer;
}

static void stbi__hdr_convert(float* output, stbi_uc* input, int req_comp) {
    if (input[3] != 0) {