Further documentation #1
Description
Although this repo is not part of official GHDL, it probably is still the best documentation for its .ghw file format an also referenced from its documentation. So I like to share the bit here, that I figured out additionally:
- unsigned integer values have the following format in
E32(I guess E='encoded'): The first byte contains bits 6 down to 0 of the LSB in its lower bits, the second byte contains bits 13 down to 7 and so on. bit 7 of each byte is used to indicate, whether an additional byte is required to store that value. So an integer 127 would be stored as [0x7f], an integer 128 as [0x80, 0x01], 16383=0x3fff as [0xff, 0x7f] and so on. - prev_len of string entries follows a similar approach: Bit 7 is used again to indicate, that an additional byte is required, but instead of bits 6 down to 0 only bits 4 down to 0 are used. This implies, that a valid character must have bit 6 or bit 5 set. Assuming '\0', '\r' and '\n' are not required, this should make sense.