1 %require "3.0"
2 /*
3 * phpdbg_parser.y
4 * (from php-src root)
5 */
6
7 %code requires {
8 #include "phpdbg.h"
9 #ifndef YY_TYPEDEF_YY_SCANNER_T
10 #define YY_TYPEDEF_YY_SCANNER_T
11 typedef void* yyscan_t;
12 #endif
13 }
14
15 %code {
16
17 #include "phpdbg_cmd.h"
18 #include "phpdbg_utils.h"
19 #include "phpdbg_cmd.h"
20 #include "phpdbg_prompt.h"
21
22 #include "phpdbg_parser.h"
23 #include "phpdbg_lexer.h"
24
25 #undef yyerror
26 static int yyerror(const char *msg);
27
28 ZEND_EXTERN_MODULE_GLOBALS(phpdbg)
29
30 #ifdef _MSC_VER
31 #define YYMALLOC malloc
32 #define YYFREE free
33 #endif
34
35 }
36
37 %define api.prefix {phpdbg_}
38 %define api.pure full
39 %define api.value.type {phpdbg_param_t}
40 %define parse.error verbose
41
42 %token END 0 "end of command"
43 %token T_EVAL "eval"
44 %token T_RUN "run"
45 %token T_SHELL "shell"
46 %token T_IF "if (condition)"
47 %token T_TRUTHY "truthy (true, on, yes or enabled)"
48 %token T_FALSY "falsy (false, off, no or disabled)"
49 %token T_STRING "string (some input, perhaps)"
50 %token T_COLON ": (colon)"
51 %token T_DCOLON ":: (double colon)"
52 %token T_POUND "# (pound sign followed by digits)"
53 %token T_SEPARATOR "# (pound sign)"
54 %token T_PROTO "protocol (file://)"
55 %token T_DIGITS "digits (numbers)"
56 %token T_LITERAL "literal (string)"
57 %token T_ADDR "address"
58 %token T_OPCODE "opcode"
59 %token T_ID "identifier (command or function name)"
60 %token T_INPUT "input (input string or data)"
61 %token T_UNEXPECTED "input"
62 %token T_REQ_ID "request id (-r %d)"
63
64 %% /* Rules */
65
66 input
67 : command { $$ = $1; }
68 | input T_SEPARATOR command { phpdbg_stack_separate($1.top); $$ = $3; }
69 | %empty { (void) phpdbg_nerrs; }
70 ;
71
72 command
73 : parameters { $$.top = PHPDBG_G(parser_stack)->top; }
74 | full_expression { phpdbg_stack_push(PHPDBG_G(parser_stack), &$1); $$.top = PHPDBG_G(parser_stack)->top; }
75 ;
76
77 parameters
78 : parameter { phpdbg_stack_push(PHPDBG_G(parser_stack), &$1); $$.top = PHPDBG_G(parser_stack)->top; }
79 | parameters parameter { phpdbg_stack_push(PHPDBG_G(parser_stack), &$2); $$.top = PHPDBG_G(parser_stack)->top; }
80 | parameters T_REQ_ID { $$ = $1; PHPDBG_G(req_id) = $2.num; }
81 ;
82
83 parameter
84 : T_ID T_COLON T_DIGITS {
85 $$.type = FILE_PARAM;
86 $$.file.name = $2.str;
87 $$.file.line = $3.num;
88 }
89 | T_ID T_COLON T_POUND T_DIGITS {
90 $$.type = NUMERIC_FILE_PARAM;
91 $$.file.name = $1.str;
92 $$.file.line = $4.num;
93 }
94 | T_PROTO T_ID T_COLON T_DIGITS {
95 $$.type = FILE_PARAM;
96 $$.file.name = malloc($1.len + $2.len + 1);
97 if ($$.file.name) {
98 memcpy(&$$.file.name[0], $1.str, $1.len);
99 memcpy(&$$.file.name[$1.len], $2.str, $2.len);
100 $$.file.name[$1.len + $2.len] = '\0';
101 }
102 $$.file.line = $4.num;
103 }
104 | T_PROTO T_ID T_COLON T_POUND T_DIGITS {
105 $$.type = NUMERIC_FILE_PARAM;
106 $$.file.name = malloc($1.len + $2.len + 1);
107 if ($$.file.name) {
108 memcpy(&$$.file.name[0], $1.str, $1.len);
109 memcpy(&$$.file.name[$1.len], $2.str, $2.len);
110 $$.file.name[$1.len + $2.len] = '\0';
111 }
112 $$.file.line = $5.num;
113 }
114 | T_ID T_DCOLON T_ID {
115 $$.type = METHOD_PARAM;
116 $$.method.class = $1.str;
117 $$.method.name = $3.str;
118 }
119 | T_ID T_DCOLON T_ID T_POUND T_DIGITS {
120 $$.type = NUMERIC_METHOD_PARAM;
121 $$.method.class = $1.str;
122 $$.method.name = $3.str;
123 $$.num = $5.num;
124 }
125 | T_ID T_POUND T_DIGITS {
126 $$.type = NUMERIC_FUNCTION_PARAM;
127 $$.str = $1.str;
128 $$.len = $1.len;
129 $$.num = $3.num;
130 }
131 | T_IF T_INPUT {
132 $$.type = COND_PARAM;
133 $$.str = $2.str;
134 $$.len = $2.len;
135 }
136 | T_OPCODE { $$ = $1; }
137 | T_ADDR { $$ = $1; }
138 | T_LITERAL { $$ = $1; }
139 | T_TRUTHY { $$ = $1; }
140 | T_FALSY { $$ = $1; }
141 | T_DIGITS { $$ = $1; }
142 | T_ID { $$ = $1; }
143 ;
144
145 req_id
146 : T_REQ_ID { PHPDBG_G(req_id) = $1.num; }
147 | %empty
148 ;
149
150 full_expression
151 : T_EVAL req_id T_INPUT {
152 $$.type = EVAL_PARAM;
153 $$.str = $3.str;
154 $$.len = $3.len;
155 }
156 | T_SHELL req_id T_INPUT {
157 $$.type = SHELL_PARAM;
158 $$.str = $3.str;
159 $$.len = $3.len;
160 }
161 | T_RUN req_id {
162 $$.type = RUN_PARAM;
163 $$.len = 0;
164 }
165 | T_RUN req_id T_INPUT {
166 $$.type = RUN_PARAM;
167 $$.str = $3.str;
168 $$.len = $3.len;
169 }
170 ;
171
172 %%
173
174 static int yyerror(const char *msg) {
175 phpdbg_error("Parse Error: %s", msg);
176
177 {
178 const phpdbg_param_t *top = PHPDBG_G(parser_stack);
179
180 while (top) {
181 phpdbg_param_debug(top, "--> ");
182 top = top->next;
183 }
184 }
185 return 0;
186 }
187
phpdbg_do_parse(phpdbg_param_t * stack,char * input)188 int phpdbg_do_parse(phpdbg_param_t *stack, char *input) {
189 if (!*input) {
190 return 0;
191 }
192
193 if (PHPDBG_G(cur_command)) {
194 free(PHPDBG_G(cur_command));
195 }
196 PHPDBG_G(cur_command) = strdup(input);
197
198 phpdbg_init_lexer(stack, input);
199
200 return yyparse();
201 }
202
