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#include <string.h>
#include <ctype.h>
#include "getch.h"
#include "token.h"
#include "err.h"
#define ARR_SIZE(X) sizeof(X)/sizeof(X[0])
char tokentype;
char token[MAXTOKEN];
char prevtoken;
char *typqual[] = {
"const",
"volatile"
};
char *storspec[] = {
"auto",
"extern",
"register",
"static"
};
char *datatyp[] = {
"char",
"int",
"long",
"short",
"signed",
"unsigned",
"void"
};
int gettoken(void)
{
char c, *p = token;
char getch(void);
void ungetch(char);
if (prevtoken == YES) {
prevtoken = NO;
return tokentype;
}
while(isblank(c = getch()))
;
if (c == '/') { /* ignore comments */
if ((c = getch()) == '/') {
while ((c = getch()) != '\n')
;
} else if (c == '*') {
while (getch() != '*' || (c = getch()) != '/')
if (c == '*')
ungetch('*');
return gettoken();
} else {
ungetch(c);
c = '/';
}
}
if (c == '(') {
if ((c = getch()) == ')') {
strcpy(token, "()");
return tokentype = PARENS;
} else {
ungetch(c);
return tokentype = '(';
}
} else if (c == '[') {
for (*p++ = '['; (*p++ = getch()) != ']';)
;
*p = '\0';
return tokentype = BRACKETS;
} else if (isalpha(c)) {
for (*p++ = c; isalnum(c = getch());)
*p++ = c;
*p = '\0';
ungetch(c);
return tokentype = NAME;
} else {
return tokentype = c;
}
}
int peaktoken()
{
char type;
if (prevtoken == YES)
err("prevtoken overflow");
type = gettoken();
prevtoken = YES;
return type;
}
int isdatatyp(void)
{
int i, len;
for (i = 0, len = ARR_SIZE(typqual); i < len; ++i)
if(!strcmp(token, typqual[i]))
return 1;
for (i = 0, len = ARR_SIZE(storspec); i < len; ++i)
if(!strcmp(token, storspec[i]))
return 1;
for (i = 0, len = ARR_SIZE(datatyp); i < len; ++i)
if(!strcmp(token, datatyp[i]))
return 1;
return 0;
}
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