[270] | 1 | /*
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| 2 | ** mruby/string.h - String class
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| 3 | **
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| 4 | ** See Copyright Notice in mruby.h
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| 5 | */
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| 6 |
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| 7 | #ifndef MRUBY_STRING_H
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| 8 | #define MRUBY_STRING_H
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| 9 |
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[331] | 10 | #include "common.h"
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[270] | 11 |
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| 12 | /**
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| 13 | * String class
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| 14 | */
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| 15 | MRB_BEGIN_DECL
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| 16 |
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| 17 | extern const char mrb_digitmap[];
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| 18 |
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| 19 | #define RSTRING_EMBED_LEN_MAX ((mrb_int)(sizeof(void*) * 3 - 1))
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| 20 |
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| 21 | struct RString {
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| 22 | MRB_OBJECT_HEADER;
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| 23 | union {
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| 24 | struct {
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| 25 | mrb_int len;
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| 26 | union {
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| 27 | mrb_int capa;
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| 28 | struct mrb_shared_string *shared;
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| 29 | } aux;
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| 30 | char *ptr;
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| 31 | } heap;
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| 32 | char ary[RSTRING_EMBED_LEN_MAX + 1];
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| 33 | } as;
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| 34 | };
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| 35 |
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| 36 | #define RSTR_EMBED_P(s) ((s)->flags & MRB_STR_EMBED)
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| 37 | #define RSTR_SET_EMBED_FLAG(s) ((s)->flags |= MRB_STR_EMBED)
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| 38 | #define RSTR_UNSET_EMBED_FLAG(s) ((s)->flags &= ~(MRB_STR_EMBED|MRB_STR_EMBED_LEN_MASK))
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| 39 | #define RSTR_SET_EMBED_LEN(s, n) do {\
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| 40 | size_t tmp_n = (n);\
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| 41 | s->flags &= ~MRB_STR_EMBED_LEN_MASK;\
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| 42 | s->flags |= (tmp_n) << MRB_STR_EMBED_LEN_SHIFT;\
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| 43 | } while (0)
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| 44 | #define RSTR_SET_LEN(s, n) do {\
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| 45 | if (RSTR_EMBED_P(s)) {\
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| 46 | RSTR_SET_EMBED_LEN((s),(n));\
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[331] | 47 | }\
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| 48 | else {\
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[270] | 49 | s->as.heap.len = (mrb_int)(n);\
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| 50 | }\
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| 51 | } while (0)
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| 52 | #define RSTR_EMBED_LEN(s)\
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| 53 | (mrb_int)(((s)->flags & MRB_STR_EMBED_LEN_MASK) >> MRB_STR_EMBED_LEN_SHIFT)
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| 54 | #define RSTR_PTR(s) ((RSTR_EMBED_P(s)) ? (s)->as.ary : (s)->as.heap.ptr)
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| 55 | #define RSTR_LEN(s) ((RSTR_EMBED_P(s)) ? RSTR_EMBED_LEN(s) : (s)->as.heap.len)
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| 56 | #define RSTR_CAPA(s) (RSTR_EMBED_P(s) ? RSTRING_EMBED_LEN_MAX : (s)->as.heap.aux.capa)
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| 57 |
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| 58 | #define RSTR_SHARED_P(s) ((s)->flags & MRB_STR_SHARED)
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| 59 | #define RSTR_SET_SHARED_FLAG(s) ((s)->flags |= MRB_STR_SHARED)
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| 60 | #define RSTR_UNSET_SHARED_FLAG(s) ((s)->flags &= ~MRB_STR_SHARED)
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| 61 |
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| 62 | #define RSTR_NOFREE_P(s) ((s)->flags & MRB_STR_NOFREE)
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| 63 | #define RSTR_SET_NOFREE_FLAG(s) ((s)->flags |= MRB_STR_NOFREE)
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| 64 | #define RSTR_UNSET_NOFREE_FLAG(s) ((s)->flags &= ~MRB_STR_NOFREE)
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| 65 |
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| 66 | /*
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| 67 | * Returns a pointer from a Ruby string
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| 68 | */
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| 69 | #define mrb_str_ptr(s) ((struct RString*)(mrb_ptr(s)))
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| 70 | #define RSTRING(s) mrb_str_ptr(s)
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| 71 | #define RSTRING_PTR(s) RSTR_PTR(RSTRING(s))
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[331] | 72 | #define RSTRING_EMBED_LEN(s) RSTR_EMBED_LEN(RSTRING(s))
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[270] | 73 | #define RSTRING_LEN(s) RSTR_LEN(RSTRING(s))
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| 74 | #define RSTRING_CAPA(s) RSTR_CAPA(RSTRING(s))
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| 75 | #define RSTRING_END(s) (RSTRING_PTR(s) + RSTRING_LEN(s))
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[331] | 76 | MRB_API mrb_int mrb_str_strlen(mrb_state*, struct RString*);
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[270] | 77 |
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| 78 | #define MRB_STR_SHARED 1
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| 79 | #define MRB_STR_NOFREE 2
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[331] | 80 | #define MRB_STR_NO_UTF 8
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| 81 | #define MRB_STR_EMBED 16
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| 82 | #define MRB_STR_EMBED_LEN_MASK 0x3e0
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| 83 | #define MRB_STR_EMBED_LEN_SHIFT 5
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[270] | 84 |
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| 85 | void mrb_gc_free_str(mrb_state*, struct RString*);
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| 86 | MRB_API void mrb_str_modify(mrb_state*, struct RString*);
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[331] | 87 | /*
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| 88 | * Appends self to other. Returns self as a concatnated string.
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| 89 | *
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| 90 | *
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| 91 | * Example:
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| 92 | *
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| 93 | * !!!c
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| 94 | * int
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| 95 | * main(int argc,
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| 96 | * char **argv)
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| 97 | * {
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| 98 | * // Variable declarations.
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| 99 | * mrb_value str1;
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| 100 | * mrb_value str2;
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| 101 | *
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| 102 | * mrb_state *mrb = mrb_open();
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| 103 | * if (!mrb)
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| 104 | * {
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| 105 | * // handle error
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| 106 | * }
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| 107 | *
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| 108 | * // Creates new Ruby strings.
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| 109 | * str1 = mrb_str_new_lit(mrb, "abc");
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| 110 | * str2 = mrb_str_new_lit(mrb, "def");
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| 111 | *
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| 112 | * // Concatnates str2 to str1.
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| 113 | * mrb_str_concat(mrb, str1, str2);
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| 114 | *
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| 115 | * // Prints new Concatnated Ruby string.
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| 116 | * mrb_p(mrb, str1);
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| 117 | *
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| 118 | * mrb_close(mrb);
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| 119 | * return 0;
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| 120 | * }
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| 121 | *
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| 122 | *
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| 123 | * Result:
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| 124 | *
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| 125 | * => "abcdef"
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| 126 | *
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| 127 | * @param [mrb_state] mrb The current mruby state.
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| 128 | * @param [mrb_value] self String to concatenate.
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| 129 | * @param [mrb_value] other String to append to self.
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| 130 | * @return [mrb_value] Returns a new String appending other to self.
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| 131 | */
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[270] | 132 | MRB_API void mrb_str_concat(mrb_state*, mrb_value, mrb_value);
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| 133 |
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| 134 | /*
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| 135 | * Adds two strings together.
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[331] | 136 | *
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| 137 | *
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| 138 | * Example:
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| 139 | *
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| 140 | * !!!c
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| 141 | * int
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| 142 | * main(int argc,
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| 143 | * char **argv)
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| 144 | * {
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| 145 | * // Variable declarations.
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| 146 | * mrb_value a;
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| 147 | * mrb_value b;
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| 148 | * mrb_value c;
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| 149 | *
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| 150 | * mrb_state *mrb = mrb_open();
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| 151 | * if (!mrb)
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| 152 | * {
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| 153 | * // handle error
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| 154 | * }
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| 155 | *
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| 156 | * // Creates two Ruby strings from the passed in C strings.
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| 157 | * a = mrb_str_new_lit(mrb, "abc");
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| 158 | * b = mrb_str_new_lit(mrb, "def");
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| 159 | *
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| 160 | * // Prints both C strings.
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| 161 | * mrb_p(mrb, a);
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| 162 | * mrb_p(mrb, b);
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| 163 | *
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| 164 | * // Concatnates both Ruby strings.
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| 165 | * c = mrb_str_plus(mrb, a, b);
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| 166 | *
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| 167 | * // Prints new Concatnated Ruby string.
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| 168 | * mrb_p(mrb, c);
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| 169 | *
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| 170 | * mrb_close(mrb);
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| 171 | * return 0;
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| 172 | * }
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| 173 | *
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| 174 | *
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| 175 | * Result:
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| 176 | *
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| 177 | * => "abc" # First string
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| 178 | * => "def" # Second string
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| 179 | * => "abcdef" # First & Second concatnated.
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| 180 | *
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| 181 | * @param [mrb_state] mrb The current mruby state.
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| 182 | * @param [mrb_value] a First string to concatenate.
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| 183 | * @param [mrb_value] b Second string to concatenate.
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| 184 | * @return [mrb_value] Returns a new String containing a concatenated to b.
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[270] | 185 | */
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| 186 | MRB_API mrb_value mrb_str_plus(mrb_state*, mrb_value, mrb_value);
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| 187 |
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| 188 | /*
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| 189 | * Converts pointer into a Ruby string.
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[331] | 190 | *
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| 191 | * @param [mrb_state] mrb The current mruby state.
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| 192 | * @param [void*] p The pointer to convert to Ruby string.
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| 193 | * @return [mrb_value] Returns a new Ruby String.
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[270] | 194 | */
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| 195 | MRB_API mrb_value mrb_ptr_to_str(mrb_state *, void*);
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| 196 |
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| 197 | /*
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| 198 | * Returns an object as a Ruby string.
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[331] | 199 | *
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| 200 | * @param [mrb_state] mrb The current mruby state.
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| 201 | * @param [mrb_value] obj An object to return as a Ruby string.
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| 202 | * @return [mrb_value] An object as a Ruby string.
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[270] | 203 | */
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| 204 | MRB_API mrb_value mrb_obj_as_string(mrb_state *mrb, mrb_value obj);
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| 205 |
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| 206 | /*
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[331] | 207 | * Resizes the string's length. Returns the amount of characters
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| 208 | * in the specified by len.
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| 209 | *
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| 210 | * Example:
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| 211 | *
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| 212 | * !!!c
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| 213 | * int
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| 214 | * main(int argc,
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| 215 | * char **argv)
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| 216 | * {
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| 217 | * // Variable declaration.
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| 218 | * mrb_value str;
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| 219 | *
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| 220 | * mrb_state *mrb = mrb_open();
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| 221 | * if (!mrb)
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| 222 | * {
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| 223 | * // handle error
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| 224 | * }
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| 225 | * // Creates a new string.
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| 226 | * str = mrb_str_new_lit(mrb, "Hello, world!");
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| 227 | * // Returns 5 characters of
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| 228 | * mrb_str_resize(mrb, str, 5);
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| 229 | * mrb_p(mrb, str);
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| 230 | *
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| 231 | * mrb_close(mrb);
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| 232 | * return 0;
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| 233 | * }
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| 234 | *
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| 235 | * Result:
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| 236 | *
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| 237 | * => "Hello"
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| 238 | *
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| 239 | * @param [mrb_state] mrb The current mruby state.
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| 240 | * @param [mrb_value] str The Ruby string to resize.
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| 241 | * @param [mrb_value] len The length.
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| 242 | * @return [mrb_value] An object as a Ruby string.
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[270] | 243 | */
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| 244 | MRB_API mrb_value mrb_str_resize(mrb_state *mrb, mrb_value str, mrb_int len);
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| 245 |
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| 246 | /*
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| 247 | * Returns a sub string.
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[331] | 248 | *
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| 249 | * Example:
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| 250 | *
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| 251 | * !!!c
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| 252 | * int
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| 253 | * main(int argc,
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| 254 | * char const **argv)
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| 255 | * {
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| 256 | * // Variable declarations.
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| 257 | * mrb_value str1;
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| 258 | * mrb_value str2;
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| 259 | *
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| 260 | * mrb_state *mrb = mrb_open();
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| 261 | * if (!mrb)
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| 262 | * {
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| 263 | * // handle error
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| 264 | * }
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| 265 | * // Creates new string.
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| 266 | * str1 = mrb_str_new_lit(mrb, "Hello, world!");
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| 267 | * // Returns a sub-string within the range of 0..2
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| 268 | * str2 = mrb_str_substr(mrb, str1, 0, 2);
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| 269 | *
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| 270 | * // Prints sub-string.
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| 271 | * mrb_p(mrb, str2);
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| 272 | *
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| 273 | * mrb_close(mrb);
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| 274 | * return 0;
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| 275 | * }
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| 276 | *
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| 277 | * Result:
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| 278 | *
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| 279 | * => "He"
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| 280 | *
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| 281 | * @param [mrb_state] mrb The current mruby state.
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| 282 | * @param [mrb_value] str Ruby string.
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| 283 | * @param [mrb_int] beg The beginning point of the sub-string.
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| 284 | * @param [mrb_int] len The end point of the sub-string.
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| 285 | * @return [mrb_value] An object as a Ruby sub-string.
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[270] | 286 | */
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| 287 | MRB_API mrb_value mrb_str_substr(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len);
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| 288 |
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| 289 | /*
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| 290 | * Returns a Ruby string type.
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[331] | 291 | *
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| 292 | *
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| 293 | * @param [mrb_state] mrb The current mruby state.
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| 294 | * @param [mrb_value] str Ruby string.
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| 295 | * @return [mrb_value] A Ruby string.
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[270] | 296 | */
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| 297 | MRB_API mrb_value mrb_string_type(mrb_state *mrb, mrb_value str);
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| 298 |
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| 299 | MRB_API mrb_value mrb_check_string_type(mrb_state *mrb, mrb_value str);
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| 300 | MRB_API mrb_value mrb_str_buf_new(mrb_state *mrb, size_t capa);
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| 301 |
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| 302 | MRB_API const char *mrb_string_value_cstr(mrb_state *mrb, mrb_value *ptr);
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[331] | 303 | MRB_API const char *mrb_string_value_ptr(mrb_state *mrb, mrb_value str);
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| 304 | /*
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| 305 | * Returns the length of the Ruby string.
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| 306 | *
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| 307 | *
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| 308 | * @param [mrb_state] mrb The current mruby state.
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| 309 | * @param [mrb_value] str Ruby string.
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| 310 | * @return [mrb_int] The length of the passed in Ruby string.
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| 311 | */
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| 312 | MRB_API mrb_int mrb_string_value_len(mrb_state *mrb, mrb_value str);
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[270] | 313 |
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| 314 | /*
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| 315 | * Duplicates a string object.
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[331] | 316 | *
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| 317 | *
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| 318 | * @param [mrb_state] mrb The current mruby state.
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| 319 | * @param [mrb_value] str Ruby string.
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| 320 | * @return [mrb_value] Duplicated Ruby string.
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[270] | 321 | */
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| 322 | MRB_API mrb_value mrb_str_dup(mrb_state *mrb, mrb_value str);
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| 323 |
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| 324 | /*
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[331] | 325 | * Returns a symbol from a passed in Ruby string.
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| 326 | *
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| 327 | * @param [mrb_state] mrb The current mruby state.
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| 328 | * @param [mrb_value] self Ruby string.
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| 329 | * @return [mrb_value] A symbol.
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[270] | 330 | */
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| 331 | MRB_API mrb_value mrb_str_intern(mrb_state *mrb, mrb_value self);
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| 332 |
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| 333 | MRB_API mrb_value mrb_str_to_inum(mrb_state *mrb, mrb_value str, mrb_int base, mrb_bool badcheck);
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| 334 | MRB_API double mrb_str_to_dbl(mrb_state *mrb, mrb_value str, mrb_bool badcheck);
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| 335 |
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| 336 | /*
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| 337 | * Returns a converted string type.
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| 338 | */
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| 339 | MRB_API mrb_value mrb_str_to_str(mrb_state *mrb, mrb_value str);
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| 340 |
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| 341 | /*
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| 342 | * Returns true if the strings match and false if the strings don't match.
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[331] | 343 | *
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| 344 | * @param [mrb_state] mrb The current mruby state.
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| 345 | * @param [mrb_value] str1 Ruby string to compare.
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| 346 | * @param [mrb_value] str2 Ruby string to compare.
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| 347 | * @return [mrb_value] boolean value.
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[270] | 348 | */
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| 349 | MRB_API mrb_bool mrb_str_equal(mrb_state *mrb, mrb_value str1, mrb_value str2);
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| 350 |
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| 351 | /*
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| 352 | * Returns a concated string comprised of a Ruby string and a C string.
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| 353 | *
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[331] | 354 | * @param [mrb_state] mrb The current mruby state.
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| 355 | * @param [mrb_value] str Ruby string.
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| 356 | * @param [const char *] ptr A C string.
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| 357 | * @param [size_t] len length of C string.
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| 358 | * @return [mrb_value] A Ruby string.
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[270] | 359 | * @see mrb_str_cat_cstr
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| 360 | */
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| 361 | MRB_API mrb_value mrb_str_cat(mrb_state *mrb, mrb_value str, const char *ptr, size_t len);
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| 362 |
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| 363 | /*
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| 364 | * Returns a concated string comprised of a Ruby string and a C string.
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| 365 | *
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[331] | 366 | * @param [mrb_state] mrb The current mruby state.
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| 367 | * @param [mrb_value] str Ruby string.
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| 368 | * @param [const char *] ptr A C string.
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| 369 | * @return [mrb_value] A Ruby string.
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[270] | 370 | * @see mrb_str_cat
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| 371 | */
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| 372 | MRB_API mrb_value mrb_str_cat_cstr(mrb_state *mrb, mrb_value str, const char *ptr);
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| 373 | MRB_API mrb_value mrb_str_cat_str(mrb_state *mrb, mrb_value str, mrb_value str2);
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| 374 | #define mrb_str_cat_lit(mrb, str, lit) mrb_str_cat(mrb, str, lit, mrb_strlen_lit(lit))
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| 375 |
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| 376 | /*
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| 377 | * Adds str2 to the end of str1.
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| 378 | */
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| 379 | MRB_API mrb_value mrb_str_append(mrb_state *mrb, mrb_value str, mrb_value str2);
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| 380 |
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| 381 | /*
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| 382 | * Returns 0 if both Ruby strings are equal. Returns a value < 0 if Ruby str1 is less than Ruby str2. Returns a value > 0 if Ruby str2 is greater than Ruby str1.
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| 383 | */
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| 384 | MRB_API int mrb_str_cmp(mrb_state *mrb, mrb_value str1, mrb_value str2);
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| 385 |
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| 386 | /*
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[331] | 387 | * Returns a newly allocated C string from a Ruby string.
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| 388 | * This is an utility function to pass a Ruby string to C library functions.
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| 389 | *
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| 390 | * - Returned string does not contain any NUL characters (but terminator).
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| 391 | * - It raises an ArgumentError exception if Ruby string contains
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| 392 | * NUL characters.
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| 393 | * - Retured string will be freed automatically on next GC.
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| 394 | * - Caller can modify returned string without affecting Ruby string
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| 395 | * (e.g. it can be used for mkstemp(3)).
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| 396 | *
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| 397 | * @param [mrb_state *] mrb The current mruby state.
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| 398 | * @param [mrb_value] str Ruby string. Must be an instance of String.
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| 399 | * @return [char *] A newly allocated C string.
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[270] | 400 | */
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| 401 | MRB_API char *mrb_str_to_cstr(mrb_state *mrb, mrb_value str);
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| 402 |
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| 403 | mrb_value mrb_str_pool(mrb_state *mrb, mrb_value str);
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| 404 | mrb_int mrb_str_hash(mrb_state *mrb, mrb_value str);
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| 405 | mrb_value mrb_str_dump(mrb_state *mrb, mrb_value str);
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| 406 |
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| 407 | /*
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| 408 | * Returns a printable version of str, surrounded by quote marks, with special characters escaped.
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| 409 | */
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| 410 | mrb_value mrb_str_inspect(mrb_state *mrb, mrb_value str);
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| 411 |
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| 412 | void mrb_noregexp(mrb_state *mrb, mrb_value self);
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| 413 | void mrb_regexp_check(mrb_state *mrb, mrb_value obj);
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| 414 |
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| 415 | /* For backward compatibility */
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| 416 | #define mrb_str_cat2(mrb, str, ptr) mrb_str_cat_cstr(mrb, str, ptr)
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| 417 | #define mrb_str_buf_cat(mrb, str, ptr, len) mrb_str_cat(mrb, str, ptr, len)
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| 418 | #define mrb_str_buf_append(mrb, str, str2) mrb_str_cat_str(mrb, str, str2)
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| 419 |
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| 420 | MRB_END_DECL
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| 421 |
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| 422 | #endif /* MRUBY_STRING_H */
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