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fe14fcc3 | 1 | /* $Header: str.h,v 4.0 91/03/20 01:40:04 lwall Locked $ |
a687059c LW |
2 | * |
3 | * Copyright (c) 1989, Larry Wall | |
4 | * | |
5 | * You may distribute under the terms of the GNU General Public License | |
6 | * as specified in the README file that comes with the perl 3.0 kit. | |
8d063cd8 LW |
7 | * |
8 | * $Log: str.h,v $ | |
fe14fcc3 LW |
9 | * Revision 4.0 91/03/20 01:40:04 lwall |
10 | * 4.0 baseline. | |
8d063cd8 LW |
11 | * |
12 | */ | |
13 | ||
14 | struct string { | |
15 | char * str_ptr; /* pointer to malloced string */ | |
e929a76b | 16 | STRLEN str_len; /* allocated size */ |
a687059c LW |
17 | union { |
18 | double str_nval; /* numeric value, if any */ | |
19 | STAB *str_stab; /* magic stab for magic "key" string */ | |
20 | long str_useful; /* is this search optimization effective? */ | |
21 | ARG *str_args; /* list of args for interpreted string */ | |
22 | HASH *str_hash; /* string represents an assoc array (stab?) */ | |
23 | ARRAY *str_array; /* string represents an array */ | |
395c3793 | 24 | CMD *str_cmd; /* command for this source line */ |
a687059c | 25 | } str_u; |
e929a76b LW |
26 | STRLEN str_cur; /* length of str_ptr as a C string */ |
27 | STR *str_magic; /* while free, link to next free str */ | |
a687059c LW |
28 | /* while in use, ptr to "key" for magic items */ |
29 | char str_pok; /* state of str_ptr */ | |
30 | char str_nok; /* state of str_nval */ | |
31 | unsigned char str_rare; /* used by search strings */ | |
32 | unsigned char str_state; /* one of SS_* below */ | |
33 | /* also used by search strings for backoff */ | |
34 | #ifdef TAINT | |
35 | bool str_tainted; /* 1 if possibly under control of $< */ | |
36 | #endif | |
37 | }; | |
38 | ||
39 | struct stab { /* should be identical, except for str_ptr */ | |
40 | STBP * str_ptr; /* pointer to malloced string */ | |
e929a76b | 41 | STRLEN str_len; /* allocated size */ |
8d063cd8 | 42 | union { |
a687059c LW |
43 | double str_nval; /* numeric value, if any */ |
44 | STAB *str_stab; /* magic stab for magic "key" string */ | |
45 | long str_useful; /* is this search optimization effective? */ | |
46 | ARG *str_args; /* list of args for interpreted string */ | |
47 | HASH *str_hash; /* string represents an assoc array (stab?) */ | |
48 | ARRAY *str_array; /* string represents an array */ | |
395c3793 | 49 | CMD *str_cmd; /* command for this source line */ |
a687059c | 50 | } str_u; |
e929a76b LW |
51 | STRLEN str_cur; /* length of str_ptr as a C string */ |
52 | STR *str_magic; /* while free, link to next free str */ | |
a687059c | 53 | /* while in use, ptr to "key" for magic items */ |
8d063cd8 LW |
54 | char str_pok; /* state of str_ptr */ |
55 | char str_nok; /* state of str_nval */ | |
a687059c LW |
56 | unsigned char str_rare; /* used by search strings */ |
57 | unsigned char str_state; /* one of SS_* below */ | |
58 | /* also used by search strings for backoff */ | |
59 | #ifdef TAINT | |
60 | bool str_tainted; /* 1 if possibly under control of $< */ | |
61 | #endif | |
62 | }; | |
63 | ||
64 | /* some extra info tacked to some lvalue strings */ | |
65 | ||
66 | struct lstring { | |
67 | struct string lstr; | |
e929a76b LW |
68 | STRLEN lstr_offset; |
69 | STRLEN lstr_len; | |
8d063cd8 LW |
70 | }; |
71 | ||
a687059c LW |
72 | /* These are the values of str_pok: */ |
73 | #define SP_VALID 1 /* str_ptr is valid */ | |
74 | #define SP_FBM 2 /* string was compiled for fbm search */ | |
75 | #define SP_STUDIED 4 /* string was studied */ | |
76 | #define SP_CASEFOLD 8 /* case insensitive fbm search */ | |
77 | #define SP_INTRP 16 /* string was compiled for interping */ | |
78 | #define SP_TAIL 32 /* fbm string is tail anchored: /foo$/ */ | |
79 | #define SP_MULTI 64 /* symbol table entry probably isn't a typo */ | |
34de22dd | 80 | #define SP_TEMP 128 /* string slated to die, so can be plundered */ |
a687059c | 81 | |
8d063cd8 LW |
82 | #define Nullstr Null(STR*) |
83 | ||
a687059c LW |
84 | /* These are the values of str_state: */ |
85 | #define SS_NORM 0 /* normal string */ | |
86 | #define SS_INCR 1 /* normal string, incremented ptr */ | |
87 | #define SS_SARY 2 /* array on save stack */ | |
88 | #define SS_SHASH 3 /* associative array on save stack */ | |
89 | #define SS_SINT 4 /* integer on save stack */ | |
90 | #define SS_SLONG 5 /* long on save stack */ | |
91 | #define SS_SSTRP 6 /* STR* on save stack */ | |
92 | #define SS_SHPTR 7 /* HASH* on save stack */ | |
93 | #define SS_SNSTAB 8 /* non-stab on save stack */ | |
395c3793 | 94 | #define SS_SCSV 9 /* callsave structure on save stack */ |
a687059c LW |
95 | #define SS_HASH 253 /* carrying an hash */ |
96 | #define SS_ARY 254 /* carrying an array */ | |
97 | #define SS_FREE 255 /* in free list */ | |
98 | /* str_state may have any value 0-255 when used to hold fbm pattern, in which */ | |
99 | /* case it indicates offset to rarest character in screaminstr key */ | |
100 | ||
8d063cd8 LW |
101 | /* the following macro updates any magic values this str is associated with */ |
102 | ||
a687059c LW |
103 | #ifdef TAINT |
104 | #define STABSET(x) \ | |
105 | (x)->str_tainted |= tainted; \ | |
106 | if ((x)->str_magic) \ | |
107 | stabset((x)->str_magic,(x)) | |
108 | #else | |
109 | #define STABSET(x) \ | |
110 | if ((x)->str_magic) \ | |
111 | stabset((x)->str_magic,(x)) | |
112 | #endif | |
113 | ||
114 | #define STR_SSET(dst,src) if (dst != src) str_sset(dst,src) | |
8d063cd8 LW |
115 | |
116 | EXT STR **tmps_list; | |
378cc40b LW |
117 | EXT int tmps_max INIT(-1); |
118 | EXT int tmps_base INIT(-1); | |
8d063cd8 LW |
119 | |
120 | char *str_2ptr(); | |
121 | double str_2num(); | |
fe14fcc3 LW |
122 | STR *str_mortal(); |
123 | STR *str_2mortal(); | |
8d063cd8 LW |
124 | STR *str_make(); |
125 | STR *str_nmake(); | |
a687059c LW |
126 | STR *str_smake(); |
127 | int str_cmp(); | |
128 | int str_eq(); | |
129 | void str_magic(); | |
130 | void str_insert(); | |
e929a76b | 131 | STRLEN str_len(); |