1 // Copyright 2008-2009 Wincent Colaiuta. All rights reserved.
3 // Redistribution and use in source and binary forms, with or without
4 // modification, are permitted provided that the following conditions are met:
6 // 1. Redistributions of source code must retain the above copyright notice,
7 // this list of conditions and the following disclaimer.
8 // 2. Redistributions in binary form must reproduce the above copyright notice,
9 // this list of conditions and the following disclaimer in the documentation
10 // and/or other materials provided with the distribution.
12 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
13 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
14 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
15 // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
16 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
17 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
18 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
19 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
20 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
21 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
22 // POSSIBILITY OF SUCH DAMAGE.
26 // when allocating memory, reserve a little more than was asked for,
27 // which can help to avoid subsequent allocations
28 #define STR_OVERALLOC 256
32 str_t *str = ALLOC_N(str_t, 1);
39 str_t *str_new_size(long len)
41 str_t *str = ALLOC_N(str_t, 1);
42 str->ptr = ALLOC_N(char, len + STR_OVERALLOC);
44 str->capacity = len + STR_OVERALLOC;
48 str_t *str_new_copy(const char *src, long len)
50 str_t *str = ALLOC_N(str_t, 1);
51 str->ptr = ALLOC_N(char, len + STR_OVERALLOC);
52 memcpy(str->ptr, src, len);
54 str->capacity = len + STR_OVERALLOC;
58 str_t *str_new_no_copy(char *src, long len)
60 str_t *str = ALLOC_N(str_t, 1);
67 str_t *str_new_from_string(VALUE string)
69 string = StringValue(string);
70 return str_new_copy(RSTRING_PTR(string), RSTRING_LEN(string));
73 VALUE string_from_str(str_t *str)
75 return rb_str_new(str->ptr, str->len);
78 void str_grow(str_t *str, long len)
80 if (str->capacity < len)
83 REALLOC_N(str->ptr, char, len + STR_OVERALLOC);
85 str->ptr = ALLOC_N(char, len + STR_OVERALLOC);
86 str->capacity = len + STR_OVERALLOC;
90 void str_append(str_t *str, const char *src, long len)
92 long new_len = str->len + len;
93 if (str->capacity < new_len)
96 REALLOC_N(str->ptr, char, new_len + STR_OVERALLOC);
98 str->ptr = ALLOC_N(char, new_len + STR_OVERALLOC);
99 str->capacity = new_len + STR_OVERALLOC;
101 memcpy(str->ptr + str->len, src, len);
105 void str_append_str(str_t *str, str_t *other)
107 str_append(str, other->ptr, other->len);
110 void str_append_string(str_t *str, VALUE other)
112 str_append(str, RSTRING_PTR(other), RSTRING_LEN(other));
115 void str_swap(str_t **a, str_t **b)
123 void str_clear(str_t *str)
128 void str_free(str_t *str)