SinusFox
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
#include "Lexer.h"
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int start(char* src) {
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if (src != 0) { // checking if the string is invalid
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if (*src != '\0') { // checking if the string is empty
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return _GET_NEXT_CHARACTER_; // if src is valid: continueing the state machine
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}
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}
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return _STOP_; // stopping the state machine in any other case
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}
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int getNextCharacter(char** ptr_current) {
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char* pos = *ptr_current;
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while(isWhiteSpace(*pos)) pos++;
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if (isLetter(*pos)) return _READ_IDENTIFIER_;
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if (isNum(*pos)) return _READ_NUM_LIT_;
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if (isOperator(*pos)) return _READ_OPERATOR_;
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return _STOP_; // stopping the state machine in any other case
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}
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int readIdentifier(char** ptr_current) {
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char* pos = *ptr_current;
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printf("%c - Identifier\n", *pos);
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pos++;
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*ptr_current = pos;
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return _GET_NEXT_CHARACTER_;
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}
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int readNumLit(char** ptr_current) {
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char* pos = *ptr_current;
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printf("%c - Number\n", *pos);
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return _GET_NEXT_CHARACTER_;
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}
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int readOperator(char** ptr_current) {
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char* pos = *ptr_current;
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printf("%c - Operator\n", *pos);
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return _GET_NEXT_CHARACTER_;
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}
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int readPunctuation(char** ptr_current) {
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char* pos = *ptr_current;
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printf("%c - Punctuation\n", *pos);
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return _GET_NEXT_CHARACTER_;
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}
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int isLetter(char in) {
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if (in >= 'A') { // capital letters
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if (in <= 'Z') {
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return 1;
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}
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}
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if (in >= 'a') { // non-capital letters
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if (in <= 'z') {
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return 1;
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}
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}
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return 0; // returning 0 if it's no letter
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}
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int isWhiteSpace(char in) {
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if (in == ' ' || in == '\n') return 1;
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return 0;
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}
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int isNum(char in) {
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if (in >= '0' && in <= 0) return 1;
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return 0;
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}
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int isOperator(char in) {
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switch(in) {
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case '=':
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break;
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case '*':
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break;
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case '+':
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break;
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default:
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return 0;
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}
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return 1;
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}
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int isPunctuation(char in) {
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if (in == ';') return 1;
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return 0;
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}
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