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STATIC uint8_t readmove(char);
STATIC uint8_t readmodifier(char);
STATIC int64_t writemoves(size_t n, uint8_t [n], size_t m, char [m]);
STATIC uint8_t
readmove(char c)
{
switch (c) {
case 'U':
return MOVE_U;
case 'D':
return MOVE_D;
case 'R':
return MOVE_R;
case 'L':
return MOVE_L;
case 'F':
return MOVE_F;
case 'B':
return MOVE_B;
default:
return UINT8_ERROR;
}
}
STATIC uint8_t
readmodifier(char c)
{
switch (c) {
case '1': /* Fallthrough */
case '2': /* Fallthrough */
case '3':
return c - '0' - 1;
case '\'':
return 2;
default:
return 0;
}
}
STATIC int64_t
writemoves(
size_t nmoves,
uint8_t m[nmoves],
size_t buf_size,
char buf[buf_size]
)
{
size_t i, len, written;
const char *s;
char *b;
if (buf_size == 0) {
LOG("Error: cannot write moves to buffer of size 0.\n");
return NISSY_ERROR_BUFFER_SIZE;
}
for (i = 0, b = buf, written = 0; i < nmoves; i++, b++, written++) {
s = movestr[m[i]];
len = strlen(s);
if (len + written >= buf_size) {
LOG("Error: the given buffer is too small for "
"writing the given moves.\n");
goto writemoves_error;
}
memcpy(b, s, len);
written += len;
b += len;
*b = ' ';
}
if (b != buf)
b--; /* Remove last space */
*b = '\0';
return (int64_t)written;
writemoves_error:
*buf = '\0';
return NISSY_ERROR_BUFFER_SIZE;
}
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