Do most of the switch cases

This commit is contained in:
Victor Fernandes 2017-03-14 22:35:12 -04:00
parent 42827b7f01
commit ab2164b431
3 changed files with 45 additions and 12 deletions

View File

@ -4,12 +4,10 @@
* as required for CST8152, Assignment #2 * as required for CST8152, Assignment #2
* scanner_init() must be called before using the scanner. * scanner_init() must be called before using the scanner.
* The file is incomplete; * The file is incomplete;
* Author: Victor Fernandes, 040772243
* Provided by: Svillen Ranev * Provided by: Svillen Ranev
* Version: 1.17.1 * Version: 1.17.1
* Date: 30 January 2017 * Date: 30 January 2017
*******************************************************************
* REPLACE THIS HEADER WITH YOUR HEADER
*******************************************************************
*/ */
/* The #define _CRT_SECURE_NO_WARNINGS should be used in MS Visual Studio projects /* The #define _CRT_SECURE_NO_WARNINGS should be used in MS Visual Studio projects
@ -85,15 +83,51 @@ which is being processed by the scanner.
*/ */
DECLARE YOUR VARIABLES HERE IF NEEDED //DECLARE YOUR VARIABLES HERE IF NEEDED
while (1){ /* endless loop broken by token returns it will generate a warning */ while (1){ /* endless loop broken by token returns it will generate a warning */
GET THE NEXT SYMBOL FROM THE INPUT BUFFER //GET THE NEXT SYMBOL FROM THE INPUT BUFFER
c = b_getc(sc_buf); c = b_getc(sc_buf);
switch (c) {
case 255: t.code = SEOF_T; return t; /* EOF */
case '\0': t.code = SEOF_T; return t; /* Source EOF */
case '\n': line++; continue; /* Ignore new line, increment line count */
case '\r': line++; continue; /* CR, increment line count*/
case ' ': continue; /* Ignore white space */
case ';': t.code = EOS_T; return t; /* End of statement */
case ',': t.code = COM_T; return t; /* Comma */
case '{': t.code = RBR_T; return t; /* Right brace */
case '}': t.code = LBR_T; return t; /* Left brace */
case '(': t.code = RPR_T; return t; /* Right parenthesis */
case ')': t.code = LPR_T; return t; /* Left parenthesis */
case '+': t.code = ART_OP_T; t.attribute.arr_op = PLUS; return t; /* Addition operator */
case '-': t.code = ART_OP_T; t.attribute.arr_op = MINUS; return t; /* Substraction operator */
case '*': t.code = ART_OP_T; t.attribute.arr_op = MULT; return t; /* Multiplication operator */
case '/': t.code = ART_OP_T; t.attribute.arr_op = DIV; return t; /* Devision operator */
case '>': t.code = REL_OP_T; t.attribute.rel_op = GT; return t; /* Greater-than relational operator */
case '<':
if (c = b_getc(sc_buf) == '>') {
t.code = REL_OP_T;
t.attribute.rel_op = NE; /* Negation operator */
return t;
}
else if (c == '<') {
t.code == SCC_OP_T; /* String concatenation operator */
}
else {
t.code = REL_OP_T;
t.attribute.rel_op = LT; /* Less-than operator */
}
b_retract(sc_buf);
c = b_getc(sc_buf);
return t;
case '.':
b_setmark(sc_buf, b_getcoffset(sc_buf)
default: /* TODO: Do alpha [a-zA-Z] stuff here*/
}
/* special cases or token driven processing */ /* special cases or token driven processing */

10
table.h
View File

@ -1,6 +1,7 @@
/* Filename: table.h /* Filename: table.h
* Transition Table and function declarations necessary for the scanner implementation * Transition Table and function declarations necessary for the scanner implementation
* as required for CST8152 - Assignment #2. * as required for CST8152 - Assignment #2.
* Author: Victor Fernandes, 040772243
* Version: 1.17.1 * Version: 1.17.1
* Date: 30 January 2017 * Date: 30 January 2017
* Provided by: Svillen Ranev * Provided by: Svillen Ranev
@ -105,10 +106,7 @@ Token aa_func03(char *lexeme); // VID SVID
Token aa_func05(char *lexeme); // DIL Token aa_func05(char *lexeme); // DIL
Token aa_func08(char *lexeme); // FPL Token aa_func08(char *lexeme); // FPL
Token aa_func10(char *lexeme); // OIL Token aa_func10(char *lexeme); // OIL
Token aa_func11(char *lexeme); // ES1 (Nothing here) Token aa_func11(char *lexeme); // ES
Token aa_func12(char *lexeme); // ES2
Token aa_func13(char *lexeme); // ES3
//Replace XX with the number of the accepting state: 02, 03 and so on. //Replace XX with the number of the accepting state: 02, 03 and so on.
/* defining a new type: pointer to function (of one char * argument) /* defining a new type: pointer to function (of one char * argument)
@ -137,8 +135,8 @@ PTR_AAF aa_table[] = {
/* State 9 */ NULL, /* State 9 */ NULL,
/* State 10 */ aa_func10, /* State 10 */ aa_func10,
/* State 11 */ aa_func11, /* State 11 */ aa_func11,
/* State 12 */ aa_func12, /* State 12 */ aa_func11,
/* State 13 */ aa_func13 /* State 13 */ aa_func11
//HERE YOU MUST PROVIDE AN INITIALIZATION FOR AN ARRAY OF POINTERS //HERE YOU MUST PROVIDE AN INITIALIZATION FOR AN ARRAY OF POINTERS
//TO ACCEPTING FUNCTIONS. THE ARRAY HAS THE SAME SIZE AS as_table[ ]. //TO ACCEPTING FUNCTIONS. THE ARRAY HAS THE SAME SIZE AS as_table[ ].

View File

@ -1,6 +1,7 @@
/* Filename: token.h /* Filename: token.h
* Token declarations necessary for the scanner implementation * Token declarations necessary for the scanner implementation
* CST8152, Assignment #2 * CST8152, Assignment #2
* Author: Victor Fernandes, 040772243
* Version: 1.17.1 * Version: 1.17.1
* Date: 30 January 2017 * Date: 30 January 2017
* Provided by: Svillen Ranev * Provided by: Svillen Ranev