| 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 | |
| 13 | #define YY_NO_UNPUT |
| 14 | |
| 15 | #define MAX_INCLUDE_DEPTH 10 |
| 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]; |
| 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 | } |
| 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++; |
| 78 | yyin=fopen(yytext,"r"); |
| 79 | if (!yyin) { |
| 80 | fatal("Can't open included file %s",yytext); |
| 81 | } |
| 82 | config_lineno=1; |
| 83 | config_file=safe_strdup(yytext,"conffile.fl/include"); |
| 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); |
| 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; |
| 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 | |