1 /* $Header: str.h,v 3.0.1.2 90/08/09 05:23:24 lwall Locked $
3 * Copyright (c) 1989, Larry Wall
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.
9 * Revision 3.0.1.2 90/08/09 05:23:24 lwall
10 * patch19: various MSDOS and OS/2 patches folded in
12 * Revision 3.0.1.1 89/10/26 23:24:42 lwall
13 * patch1: rearranged some structures to align doubles better on Gould
15 * Revision 3.0 89/10/18 15:23:49 lwall
21 char * str_ptr; /* pointer to malloced string */
22 STRLEN str_len; /* allocated size */
24 double str_nval; /* numeric value, if any */
25 STAB *str_stab; /* magic stab for magic "key" string */
26 long str_useful; /* is this search optimization effective? */
27 ARG *str_args; /* list of args for interpreted string */
28 HASH *str_hash; /* string represents an assoc array (stab?) */
29 ARRAY *str_array; /* string represents an array */
31 STRLEN str_cur; /* length of str_ptr as a C string */
32 STR *str_magic; /* while free, link to next free str */
33 /* while in use, ptr to "key" for magic items */
34 char str_pok; /* state of str_ptr */
35 char str_nok; /* state of str_nval */
36 unsigned char str_rare; /* used by search strings */
37 unsigned char str_state; /* one of SS_* below */
38 /* also used by search strings for backoff */
40 bool str_tainted; /* 1 if possibly under control of $< */
44 struct stab { /* should be identical, except for str_ptr */
45 STBP * str_ptr; /* pointer to malloced string */
46 STRLEN str_len; /* allocated size */
48 double str_nval; /* numeric value, if any */
49 STAB *str_stab; /* magic stab for magic "key" string */
50 long str_useful; /* is this search optimization effective? */
51 ARG *str_args; /* list of args for interpreted string */
52 HASH *str_hash; /* string represents an assoc array (stab?) */
53 ARRAY *str_array; /* string represents an array */
55 STRLEN str_cur; /* length of str_ptr as a C string */
56 STR *str_magic; /* while free, link to next free str */
57 /* while in use, ptr to "key" for magic items */
58 char str_pok; /* state of str_ptr */
59 char str_nok; /* state of str_nval */
60 unsigned char str_rare; /* used by search strings */
61 unsigned char str_state; /* one of SS_* below */
62 /* also used by search strings for backoff */
64 bool str_tainted; /* 1 if possibly under control of $< */
68 /* some extra info tacked to some lvalue strings */
76 /* These are the values of str_pok: */
77 #define SP_VALID 1 /* str_ptr is valid */
78 #define SP_FBM 2 /* string was compiled for fbm search */
79 #define SP_STUDIED 4 /* string was studied */
80 #define SP_CASEFOLD 8 /* case insensitive fbm search */
81 #define SP_INTRP 16 /* string was compiled for interping */
82 #define SP_TAIL 32 /* fbm string is tail anchored: /foo$/ */
83 #define SP_MULTI 64 /* symbol table entry probably isn't a typo */
85 #define Nullstr Null(STR*)
87 /* These are the values of str_state: */
88 #define SS_NORM 0 /* normal string */
89 #define SS_INCR 1 /* normal string, incremented ptr */
90 #define SS_SARY 2 /* array on save stack */
91 #define SS_SHASH 3 /* associative array on save stack */
92 #define SS_SINT 4 /* integer on save stack */
93 #define SS_SLONG 5 /* long on save stack */
94 #define SS_SSTRP 6 /* STR* on save stack */
95 #define SS_SHPTR 7 /* HASH* on save stack */
96 #define SS_SNSTAB 8 /* non-stab on save stack */
97 #define SS_HASH 253 /* carrying an hash */
98 #define SS_ARY 254 /* carrying an array */
99 #define SS_FREE 255 /* in free list */
100 /* str_state may have any value 0-255 when used to hold fbm pattern, in which */
101 /* case it indicates offset to rarest character in screaminstr key */
103 /* the following macro updates any magic values this str is associated with */
107 (x)->str_tainted |= tainted; \
108 if ((x)->str_magic) \
109 stabset((x)->str_magic,(x))
112 if ((x)->str_magic) \
113 stabset((x)->str_magic,(x))
116 #define STR_SSET(dst,src) if (dst != src) str_sset(dst,src)
119 EXT int tmps_max INIT(-1);
120 EXT int tmps_base INIT(-1);