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135 lines
4.4 KiB
C++
135 lines
4.4 KiB
C++
// Definition of the SkipToken function.
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// This can be #included in the game code, and in PC utilities.
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// It is in this file so that only this file needs to be updated when SkipToken
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// needs to be modified.
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// If included in PC code, then uint8 and Dbg_MsgAssert will need to be defined.
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// Returns a pointer to the next token after p_token.
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// It won't necessarily skip over the complete format of the data that is expected
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// to follow, it will just skip over enough that it returns a pointer to a token again.
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// For example, ESCRIPTTOKEN_KEYWORD_RANDOM_RANGE must be followed by a ESCRIPTTOKEN_PAIR,
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// but SkipToken will not check for that and skip over the pair token too, it will just skip over the
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// RANDOM_RANGE token and return a pointer to the ESCRIPTTOKEN_PAIR
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// So if SkipToken is passed a pointer to a token, it is guaranteed to return a pointer to token, namely
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// the nearest next one.
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uint8 *SkipToken(uint8 *p_token)
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{
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switch (*p_token)
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{
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case ESCRIPTTOKEN_ENDOFFILE:
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Dbg_MsgAssert(0,("Tried to skip past EndOfFile token"));
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break;
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case ESCRIPTTOKEN_ENDOFLINE:
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case ESCRIPTTOKEN_EQUALS:
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case ESCRIPTTOKEN_DOT:
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case ESCRIPTTOKEN_COMMA:
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case ESCRIPTTOKEN_MINUS:
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case ESCRIPTTOKEN_ADD:
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case ESCRIPTTOKEN_DIVIDE:
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case ESCRIPTTOKEN_MULTIPLY:
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case ESCRIPTTOKEN_OPENPARENTH:
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case ESCRIPTTOKEN_CLOSEPARENTH:
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case ESCRIPTTOKEN_SAMEAS:
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case ESCRIPTTOKEN_LESSTHAN:
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case ESCRIPTTOKEN_LESSTHANEQUAL:
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case ESCRIPTTOKEN_GREATERTHAN:
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case ESCRIPTTOKEN_GREATERTHANEQUAL:
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case ESCRIPTTOKEN_STARTSTRUCT:
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case ESCRIPTTOKEN_STARTARRAY:
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case ESCRIPTTOKEN_ENDSTRUCT:
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case ESCRIPTTOKEN_ENDARRAY:
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case ESCRIPTTOKEN_KEYWORD_BEGIN:
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case ESCRIPTTOKEN_KEYWORD_REPEAT:
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case ESCRIPTTOKEN_KEYWORD_BREAK:
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case ESCRIPTTOKEN_KEYWORD_SCRIPT:
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case ESCRIPTTOKEN_KEYWORD_ENDSCRIPT:
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case ESCRIPTTOKEN_KEYWORD_IF:
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case ESCRIPTTOKEN_KEYWORD_ELSE:
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case ESCRIPTTOKEN_KEYWORD_ELSEIF:
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case ESCRIPTTOKEN_KEYWORD_ENDIF:
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case ESCRIPTTOKEN_KEYWORD_RETURN:
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case ESCRIPTTOKEN_KEYWORD_ALLARGS:
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case ESCRIPTTOKEN_ARG:
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case ESCRIPTTOKEN_OR:
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case ESCRIPTTOKEN_AND:
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case ESCRIPTTOKEN_XOR:
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case ESCRIPTTOKEN_SHIFT_LEFT:
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case ESCRIPTTOKEN_SHIFT_RIGHT:
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case ESCRIPTTOKEN_KEYWORD_RANDOM_RANGE:
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case ESCRIPTTOKEN_KEYWORD_RANDOM_RANGE2:
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case ESCRIPTTOKEN_KEYWORD_NOT:
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case ESCRIPTTOKEN_KEYWORD_AND:
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case ESCRIPTTOKEN_KEYWORD_OR:
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case ESCRIPTTOKEN_KEYWORD_SWITCH:
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case ESCRIPTTOKEN_KEYWORD_ENDSWITCH:
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case ESCRIPTTOKEN_KEYWORD_CASE:
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case ESCRIPTTOKEN_KEYWORD_DEFAULT:
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case ESCRIPTTOKEN_COLON:
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++p_token;
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break;
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case ESCRIPTTOKEN_NAME:
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case ESCRIPTTOKEN_INTEGER:
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case ESCRIPTTOKEN_HEXINTEGER:
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case ESCRIPTTOKEN_FLOAT:
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case ESCRIPTTOKEN_ENDOFLINENUMBER:
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case ESCRIPTTOKEN_JUMP:
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case ESCRIPTTOKEN_RUNTIME_MEMBERFUNCTION:
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case ESCRIPTTOKEN_RUNTIME_CFUNCTION:
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p_token+=5;
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break;
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case ESCRIPTTOKEN_VECTOR:
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p_token+=13;
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break;
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case ESCRIPTTOKEN_PAIR:
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p_token+=9;
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break;
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case ESCRIPTTOKEN_STRING:
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case ESCRIPTTOKEN_LOCALSTRING:
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{
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++p_token;
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uint32 num_bytes=*p_token++;
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num_bytes+=(*p_token++)<<8;
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num_bytes+=(*p_token++)<<16;
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num_bytes+=(*p_token++)<<24;
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p_token+=num_bytes;
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break;
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}
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case ESCRIPTTOKEN_CHECKSUM_NAME:
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// Skip over the token and checksum.
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p_token+=5;
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// Skip over the string.
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while (*p_token)
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{
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++p_token;
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}
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// Skip over the terminator.
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++p_token;
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break;
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case ESCRIPTTOKEN_KEYWORD_RANDOM:
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case ESCRIPTTOKEN_KEYWORD_RANDOM2:
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case ESCRIPTTOKEN_KEYWORD_RANDOM_NO_REPEAT:
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case ESCRIPTTOKEN_KEYWORD_RANDOM_PERMUTE:
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{
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++p_token;
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uint32 num_jumps=*p_token++;
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num_jumps+=(*p_token++)<<8;
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num_jumps+=(*p_token++)<<16;
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num_jumps+=(*p_token++)<<24;
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// Skip over all the weight & jump offsets.
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p_token+=2*num_jumps+4*num_jumps;
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break;
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}
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default:
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Dbg_MsgAssert(0,("Unrecognized script token sent to SkipToken()"));
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break;
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}
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return p_token;
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}
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