Commit | Line | Data |
---|---|---|
2fe58dfd SE |
1 | /* the "incl" state is used for picking up the name of an include file */ |
2 | %x incl | |
3 | ||
4 | %{ | |
5 | #include <stdio.h> | |
6 | #include <stdlib.h> | |
7 | #include <string.h> | |
8 | ||
9 | #include "conffile_internal.h" | |
10 | #include "conffile.tab.h" | |
11 | #include "util.h" | |
12 | ||
558fa3fb SE |
13 | #define YY_NO_UNPUT |
14 | ||
2fe58dfd | 15 | #define MAX_INCLUDE_DEPTH 10 |
974d0468 SE |
16 | struct include_stack_item { |
17 | YY_BUFFER_STATE bst; | |
18 | uint32_t lineno; | |
19 | string_t file; | |
20 | }; | |
21 | struct include_stack_item include_stack[MAX_INCLUDE_DEPTH]; | |
2fe58dfd SE |
22 | int include_stack_ptr=0; |
23 | ||
24 | uint32_t config_lineno=0; | |
25 | string_t config_file="xxx"; | |
26 | ||
27 | static struct p_node *leafnode(uint32_t type) | |
28 | { | |
29 | struct p_node *r; | |
30 | ||
31 | r=safe_malloc(sizeof(*r),"leafnode"); | |
32 | r->type=type; | |
33 | r->loc.file=config_file; | |
34 | r->loc.line=config_lineno; | |
35 | r->l=NULL; r->r=NULL; | |
36 | return r; | |
37 | } | |
38 | ||
39 | static struct p_node *keynode(atom_t key) | |
40 | { | |
41 | struct p_node *r; | |
42 | r=leafnode(T_KEY); | |
43 | r->data.key=intern(key); | |
44 | return r; | |
45 | } | |
46 | ||
47 | static struct p_node *stringnode(string_t string) | |
48 | { | |
49 | struct p_node *r; | |
50 | r=leafnode(T_STRING); | |
51 | string++; | |
52 | string[strlen(string)-1]=0; | |
53 | r->data.string=safe_strdup(string,"stringnode"); | |
54 | return r; | |
55 | } | |
56 | ||
57 | static struct p_node *numnode(string_t number) | |
58 | { | |
59 | struct p_node *r; | |
60 | r=leafnode(T_NUMBER); | |
61 | r->data.number=atoi(number); | |
62 | return r; | |
63 | } | |
64 | ||
65 | %} | |
66 | ||
67 | %% | |
68 | include BEGIN(incl); | |
69 | <incl>[ \t]* /* eat the whitespace */ | |
70 | <incl>[^ \t\n]+ { /* got the include filename */ | |
71 | if (include_stack_ptr >= MAX_INCLUDE_DEPTH) { | |
72 | fatal("Configuration file includes nested too deeply"); | |
73 | } | |
974d0468 SE |
74 | include_stack[include_stack_ptr].bst=YY_CURRENT_BUFFER; |
75 | include_stack[include_stack_ptr].lineno=config_lineno; | |
76 | include_stack[include_stack_ptr].file=config_file; | |
77 | include_stack_ptr++; | |
2fe58dfd SE |
78 | yyin=fopen(yytext,"r"); |
79 | if (!yyin) { | |
80 | fatal("Can't open included file %s",yytext); | |
81 | } | |
974d0468 SE |
82 | config_lineno=1; |
83 | config_file=safe_strdup(yytext,"conffile.fl/include"); | |
2fe58dfd SE |
84 | yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE)); |
85 | BEGIN(INITIAL); | |
86 | } | |
87 | <<EOF>> { | |
88 | if (--include_stack_ptr < 0) { | |
89 | yyterminate(); | |
90 | } | |
91 | else { | |
92 | fclose(yyin); | |
93 | yy_delete_buffer(YY_CURRENT_BUFFER); | |
974d0468 SE |
94 | yy_switch_to_buffer(include_stack[include_stack_ptr].bst); |
95 | config_lineno=include_stack[include_stack_ptr].lineno; | |
96 | config_file=include_stack[include_stack_ptr].file; | |
2fe58dfd SE |
97 | } |
98 | } | |
99 | \"[^\"]*\" yylval=stringnode(yytext); return TOK_STRING; | |
100 | ||
101 | [[:alpha:]_][[:alnum:]\-_]* yylval=keynode(yytext); return TOK_KEY; | |
102 | ||
103 | [[:digit:]]+ yylval=numnode(yytext); return TOK_NUMBER; | |
104 | ||
105 | /* Eat comments */ | |
106 | \#.*\n config_lineno++; | |
107 | /* Count lines */ | |
108 | \n config_lineno++; | |
109 | /* Eat whitespace */ | |
110 | [[:blank:]\j] | |
111 | ||
112 | /* Return all unclaimed single characters to the parser */ | |
113 | . return *yytext; | |
114 |