1 /* $Header: str.h,v 4.0 91/03/20 01:40:04 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 4.0 91/03/20 01:40:04 lwall
15 char * str_ptr; /* pointer to malloced string */
16 STRLEN str_len; /* allocated size */
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 */
24 CMD *str_cmd; /* command for this source line */
26 STRLEN str_cur; /* length of str_ptr as a C string */
27 STR *str_magic; /* while free, link to next free str */
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 */
35 bool str_tainted; /* 1 if possibly under control of $< */
39 struct stab { /* should be identical, except for str_ptr */
40 STBP * str_ptr; /* pointer to malloced string */
41 STRLEN str_len; /* allocated size */
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 */
49 CMD *str_cmd; /* command for this source line */
51 STRLEN str_cur; /* length of str_ptr as a C string */
52 STR *str_magic; /* while free, link to next free str */
53 /* while in use, ptr to "key" for magic items */
54 char str_pok; /* state of str_ptr */
55 char str_nok; /* state of str_nval */
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 */
60 bool str_tainted; /* 1 if possibly under control of $< */
64 /* some extra info tacked to some lvalue strings */
72 /* These are the values of str_pok: */
73 #define SP_VALID 1 /* str_ptr is valid */
74 #define SP_FBM 2 /* string was compiled for fbm search */
75 #define SP_STUDIED 4 /* string was studied */
76 #define SP_CASEFOLD 8 /* case insensitive fbm search */
77 #define SP_INTRP 16 /* string was compiled for interping */
78 #define SP_TAIL 32 /* fbm string is tail anchored: /foo$/ */
79 #define SP_MULTI 64 /* symbol table entry probably isn't a typo */
80 #define SP_TEMP 128 /* string slated to die, so can be plundered */
82 #define Nullstr Null(STR*)
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 */
94 #define SS_SCSV 9 /* callsave structure on save stack */
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 */
101 /* the following macro updates any magic values this str is associated with */
105 (x)->str_tainted |= tainted; \
106 if ((x)->str_magic) \
107 stabset((x)->str_magic,(x))
110 if ((x)->str_magic) \
111 stabset((x)->str_magic,(x))
114 #define STR_SSET(dst,src) if (dst != src) str_sset(dst,src)
117 EXT int tmps_max INIT(-1);
118 EXT int tmps_base INIT(-1);