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1 | /* $Header: str.h,v 4.0 91/03/20 01:40:04 lwall Locked $ |
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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. |
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7 | * |
8 | * $Log: str.h,v $ |
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9 | * Revision 4.0 91/03/20 01:40:04 lwall |
10 | * 4.0 baseline. |
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11 | * |
12 | */ |
13 | |
14 | struct string { |
15 | char * str_ptr; /* pointer to malloced string */ |
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16 | STRLEN str_len; /* allocated size */ |
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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 */ |
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24 | CMD *str_cmd; /* command for this source line */ |
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25 | } str_u; |
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26 | STRLEN str_cur; /* length of str_ptr as a C string */ |
27 | STR *str_magic; /* while free, link to next free str */ |
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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 */ |
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41 | STRLEN str_len; /* allocated size */ |
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42 | union { |
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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 */ |
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49 | CMD *str_cmd; /* command for this source line */ |
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50 | } str_u; |
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51 | STRLEN str_cur; /* length of str_ptr as a C string */ |
52 | STR *str_magic; /* while free, link to next free str */ |
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53 | /* while in use, ptr to "key" for magic items */ |
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54 | char str_pok; /* state of str_ptr */ |
55 | char str_nok; /* state of str_nval */ |
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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 $< */ |
61 | #endif |
62 | }; |
63 | |
64 | /* some extra info tacked to some lvalue strings */ |
65 | |
66 | struct lstring { |
67 | struct string lstr; |
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68 | STRLEN lstr_offset; |
69 | STRLEN lstr_len; |
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70 | }; |
71 | |
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72 | /* These are the values of str_pok: */ |
73 | #define SP_VALID 1 /* str_ptr is valid */ |
74 | #define SP_FBM 2 /* string was compiled for fbm search */ |
75 | #define SP_STUDIED 4 /* string was studied */ |
76 | #define SP_CASEFOLD 8 /* case insensitive fbm search */ |
77 | #define SP_INTRP 16 /* string was compiled for interping */ |
78 | #define SP_TAIL 32 /* fbm string is tail anchored: /foo$/ */ |
79 | #define SP_MULTI 64 /* symbol table entry probably isn't a typo */ |
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80 | #define SP_TEMP 128 /* string slated to die, so can be plundered */ |
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81 | |
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82 | #define Nullstr Null(STR*) |
83 | |
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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 */ |
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94 | #define SS_SCSV 9 /* callsave structure on save stack */ |
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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 | |
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101 | /* the following macro updates any magic values this str is associated with */ |
102 | |
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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) |
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115 | |
116 | EXT STR **tmps_list; |
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117 | EXT int tmps_max INIT(-1); |
118 | EXT int tmps_base INIT(-1); |
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119 | |
120 | char *str_2ptr(); |
121 | double str_2num(); |
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122 | STR *str_mortal(); |
123 | STR *str_2mortal(); |
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124 | STR *str_make(); |
125 | STR *str_nmake(); |
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126 | STR *str_smake(); |
127 | int str_cmp(); |
128 | int str_eq(); |
129 | void str_magic(); |
130 | void str_insert(); |
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131 | STRLEN str_len(); |