/* Posix */
#include <unistd.h>
#include <stdlib.h>
+#include <limits.h> //realpath, NAME_MAX, PATH_MAX
#include <dirent.h>
/* Local */
#include "parser.tab.h"
#define TK_STACKSIZE 1024
#endif
/* Public */
-int lexer_init(void);
-int lexer(void);
-int lexer_lexfile(const char*);
-void lexer_pushtok(int, YYSTYPE);
-extern //lexer_lex.rl
-int lexer_lex(const char*);
+int lexer_init(void);
+int lexer(void);
+int lexer_lexfile(const char*);
+void lexer_pushtok(int, YYSTYPE);
+char const* lexer_get_current_filepath(void);
struct dirent* lexer_direntpa[DE_STACKSIZE], **lexer_direntpp;
/* Private */
+extern //lexer_lex.rl
+int lexer_lex(const char*);
extern //scanner.c
-int scanner_init(void);
+int scanner_init(void);
extern //scanner.c
-int scanner(void);
+int scanner(void);
static inline
-int dredge_current_depth(void);
+int dredge_current_depth(void);
extern //bison
-YYSTYPE yylval;
+YYSTYPE yylval;
+static
+char const* current_filename;
static
struct tok
{ YYSTYPE lval; //token val
int tok_t; //token type
-} token_stack[TK_STACKSIZE];
-static
-union tokp
-{ int* tpt; //token pointer type
- struct tok* tok;
- YYSTYPE* tvp; //token value pointer
-} tks, tkx;
+} token_stack[TK_STACKSIZE], *tsp, *tsx;
/* Directory Entity Array/Stack
Simple array for keeping track of dirents yet to be processed by the scanner.
times in a sequence!
*/
#define TK_STACK (token_stack)
-#define TK_STACKP (tks.tok)
-#define TK_STACKPI (tks.tpt)
-#define TK_STACKPL (tks.tvp)
-#define TK_STACKX (tkx.tok)
-#define TK_STACKXI (tkx.tpt)
+#define TK_STACKP (tsp)
+#define TK_STACKX (tsx)
#define TK_LEN() (TK_STACKX - TK_STACKP)
#define TK_INIT() (TK_STACKP = TK_STACKX = TK_STACK)
#define TK_POP() (*TK_STACKP++)
-#define TK_POPI() (*TK_STACKPI++);
-#define TK_POPL() (*TK_STACKPL++);
#define TK_PUSH(T,L) (*TK_STACKX++ = (struct tok){L,T})
/* Initializer
- The initializer returns boolean true if an error occurs, which may be handled with standard errno.
+ The initializer returns boolean true if an error occurs, which may be handled
+ with standard errno.
*/
int lexer_init
()
goto done; \
} while (0)
()
-{start:
+{ struct tok token;
+ start:
while (DE_LEN() > 0) //lex any directory entries in our stack
if (lexer_lexfile(DE_POP()->d_name) == 0)
FAIL("Lexer failed to tokenize [%s]\n",(*DE_STACKP)->d_name);
goto start; //start over and lex them
}
}
- yylval = TK_POPL();
- return TK_POPI();
+ token = TK_POP();
+ yylval = token.lval;
+ return token.tok_t;
done:
yylval.val = 0;
return 0;
exit(EXIT_FAILURE);
}
TK_PUSH(tok, lval);
- printf("Pushed Token %i | %i\n", TK_STACK[TK_LEN() - 1].tok_t, TK_STACK[TK_LEN() - 1].lval.val);
}
/* Lexical analysis of a file
Strips a filename to its base name, then sends it to lexer_lex
*/
int lexer_lexfile
-#define MAX_FNAME 2048
#define HIDDEN_WARNING "%s is hidden and will not be parsed!\n", filename
( const char *filename
)
-{ static char fname[MAX_FNAME];
+{ static char fname[NAME_MAX];
char *last_period = NULL, *iter;
if (*filename == '.')
{ fprintf (stderr, HIDDEN_WARNING);
return 0;
}
- strncpy(fname,filename,MAX_FNAME);
+ /* Copy the filename and remove its suffix */
+ strncpy(fname,filename,NAME_MAX);
last_period = NULL;
- for (iter = fname; *iter; iter++)
+ for (iter = fname; *iter; iter++) //find the last '.' char
if (*iter == '.')
last_period = iter;
- if (last_period)
- *last_period = '\0';
+ if (last_period) //if we found one,
+ *last_period = '\0'; //truncate the string there
+ /* Register the current_filename */
+ current_filename = filename;
+
return lexer_lex(fname);
}
+
+char const* lexer_get_current_filepath
+()
+{ static char current_path[PATH_MAX];
+ static char const* last_filename;
+ if ((!last_filename || last_filename != current_filename) &&
+ (realpath(current_filename, current_path) != current_path))
+ { perror("realpath: ");
+ return NULL;
+ }
+ return (const char*)current_path;
+}