5 #include "parser.tab.h"
11 void lexer_quit(void);
12 int lexer_lexfile(uint8_t*);
13 int lexer_lexdir(uint8_t*);
14 int lexer_lexstring(uint8_t*, int);
20 /* Ring buffer for keeping lexical tokens valid for up to 255 tokens */
22 YYSTYPE lval_stack[0xFF + 1];
25 #define PUSHTOK(T,L) yypush_parse(pstate, T, (L), cstate)
26 #define LEXTOK(T,Y,L) do { \
27 printf("lval[%i]\n",lval_offs);\
28 lval_stack[lval_offs].Y = L; \
29 PUSHTOK(T,lval_stack + lval_offs); \
30 lval_offs = (lval_offs + 1); \
33 #define PUSHFACE(F) LEXTOK(FACING, face, F)
34 #define PUSHREF(R) LEXTOK(REF, ref, R)
35 #define PUSHLINK() LEXTOK(LINK, val, 0)
36 #define PUSHNUM(N) LEXTOK(NUM, val, N)
37 #define PUSHNAME(N) LEXTOK(NAME, str, N)
38 #define PUSHOP(O) LEXTOK(O, val, 0)
39 #define PUSHPATH(P) LEXTOK(PATH, str, P)
41 /* Lexstring is the main lexer for APC and is generated by ragel. It lexes file names of files
42 that have been scanned and pushes their types and values into the tok_stack, which yyparse
43 eventually calls during parsing. */
48 # set up yylval and tok_t to be pushed to stack
49 action push_ref { errno = 0;
50 lval.ref = strtoll((char*)ts,NULL,16);
52 { fprintf(stderr, "Invalid hex number in file %s\n",(char*)str);
57 action push_link { PUSHLINK(); }
58 action push_val { errno = 0;
59 lval.val = strtoll((char*)ts,NULL,10);
61 { fprintf(stderr, "strtoll could not parse %s\n", (char*)str);
66 action push_name { printf("Lexer_lexstring:: action:push_name: from %s to %s\n", ts, p);
69 action push_map { printf("Lexer_lexstring:: action:push_map: pushing map token\n");
72 action set_ts { printf("Lexer_lexstring:: action:set_ts. ts = %s\n", p); ts = p; }
73 action push_SS { printf("Lexer_lexstring:: action:push_SS. p = %s\n",p);
76 action push_S { printf("Lexer_lexstring:: action:push_S. p = %s\n", p);
79 action push_SW { printf("Lexer_lexstring:: action:push_SW. p = %s\n", p);
82 action push_W { printf("Lexer_lexstring:: action:push_W. p = %s\n", p);
85 action push_NW { printf("Lexer_lexstring:: action:push_NW. p = %s\n", p);
88 action push_N { printf("Lexer_lexstring:: action:push_N. p = %s\n", p);
91 action push_NE { printf("Lexer_lexstring:: action:push_NE. p = %s\n", p);
94 action push_E { printf("Lexer_lexstring:: action:push_N. p = %s\n", p);
97 action push_SE { printf("Lexer_lexstring:: action:push_N. p = %s\n", p);
100 action ref_error { printf("ref from %s to %s has an inappropriate amount of hex digits, it must have eight.\n", ts, p);
103 action p { printf("Lexer_lexstring:: p = %s\n", p);}
116 direction = (N | W | S | E | NW | NE | SW | SE) ;
117 dimensions = (digit+ - '0') >set_ts %push_val 'x' (digit+ - '0') >set_ts %push_val;
118 link = '#' %push_link;
119 SS = ('+SS' %to(push_SS)) | ('+SS' %to(push_SS) link ) ;
120 ref = '0x' >set_ts alnum{8} $err(ref_error) %push_ref ;
121 val = digit+ >set_ts %push_val ;
122 name = lower >set_ts (lower | digit)* %push_name ;
123 map = '+MAP' %to(push_map);
124 tok = (name | val | ref | dimensions | map | link | SS | direction);
127 main := (tok tok_delimiter)* tok [\0];
129 write data nofinal noerror noprefix;
135 { pstate = yypstate_new();
136 cstate = yycstate_new();
138 return !pstate || !cstate;
143 { if (pstate) yypstate_delete(pstate);
144 if (cstate) yycstate_delete(cstate);
152 uint8_t *ts, *pe, *eof;
158 pe = eof = p + size + 1;
160 printf("|---Begin lexstring on p = %s, pe = %s.\n",p, pe);
165 printf("Ending lexstring of file %s, pushed %d tokens.\n",str, ntok);
170 /* Lexical analysis of a file
171 Strips a filename to its base name, then sends it to lexer_lexstring before
172 pushing a PATH token with the filename
173 Returns the number of tokens pushed to the parser.
176 ( uint8_t* filename )
177 { uint8_t* last_period,* iter,* filename_end;
180 for (iter = filename; *iter; iter++)
182 { // Keep track of the last 'dot' in the name
183 case '.' : last_period = iter; continue;
184 // replace '_' with '\0' so bison can use strlen on them as tokens.
185 case '_' : *iter = '\0';
188 // Mark the end of the filename
190 // Lex from either the last period, if present, or filename end
191 ntok = (last_period) ?
192 lexer_lexstring(filename, (int)(last_period - filename))
193 : lexer_lexstring(filename, (int)(iter - filename));
194 // Replace nulls with their original '_'
195 for (iter = filename; iter < filename_end; iter++)
205 { uint8_t* de = dirname;
209 if (*de) while (*++de);
210 ntok = lexer_lexstring(dirname, (int)(de - dirname));