libcutils

libcutils/src/dyn_string.c
dyn_string.c
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1#include <cutils/dyn_string.h>
2
3String* string_with_capacity(size_t capacity)
4{
5 String* string = malloc(sizeof(*string));
6 if(!string)
7 return NULL;
8 string->chars = calloc(capacity,sizeof(*string->chars));
9 if(!string->chars)
10 {
11 free(string);
12 return NULL;
13 }
14 string->length = 0;
15 string->capacity = capacity;
16
17 return string;
18}
19
20void string_remove_range(String* string, size_t index, size_t length)
21{
22 memmove(string->chars+index, string->chars+index+length, (string->length-(index+length)));
23 string->length -= length;
24}
25
26size_t string_strip(String* string, char character)
27{
28 size_t i, last = 0, offset = 0;
29 bool first = true;
30
31 for(i = 0; i < string->length; i++)
32 {
33 if(string_at(string,i) == character)
34 {
35 if(first)
36 {
37 first = false;
38 } else {
39 memmove(string->chars+last-offset, string->chars+last+1, i-last-1);
40 offset++;
41 }
42
43 last = i;
44 }
45 }
46
47 memmove(string->chars+last-offset, string->chars+last+1, string->length-last-1);
48
49 string->length -= offset+(first ? 0 : 1);
50 return offset;
51}
52
53bool string_insert(String* string, size_t index, char character)
54{
55 if(index > string->length || string->length == SIZE_MAX || !string_adjust_size(string, string->length))
56 return false;
57
58 memmove(string->chars+index+1, string->chars+index, (string->length-index)*sizeof(*string->chars));
59 string->chars[index] = character;
60 string->length++;
61 return true;
62}
63
64char string_pop_at(String* string, size_t index)
65{
66 char tmp = string_at(string, index);
67 if(!tmp)
68 {
69 return '\0';
70 } else {
71 string_remove(string, index);
72 return tmp;
73 }
74}
75
76bool string_concat(String* string, const String* other)
77{
78 if(!string_adjust_size(string,string->length+other->length-1))
79 return false;
80 memcpy(string->chars+string->length,other->chars,other->length);
81 string->length += other->length;
82 return true;
83}
84
85bool string_find_char(const String* haystack, const char needle, size_t* pos)
86{
87 size_t i;
88
89 for(i = 0; i < haystack->length; i++)
90 {
91 if(haystack->chars[i] == needle)
92 {
93 *pos = i;
94 return true;
95 }
96 }
97 return false;
98}
99
100size_t string_count(const String* string, char character)
101{
102 size_t i, ret = 0;
103 for(i = 0; i < string->length; i++)
104 {
105 if(string_at(string, i) == character)
106 ret++;
107 }
108 return ret;
109}
110
111bool string_adjust_size(String* string, size_t size)
112{
113 while(string->capacity < size)
114 {
115 char* tmp = string->chars;
116 string->chars = cutil_reallocarray_inc(string->chars, sizeof(*string->chars), string->capacity, string->capacity);
117 if(!string->chars)
118 {
119 string->chars = tmp;
120 return false;
121 }
122 string->capacity *= 2;
123 }
124 return true;
125}
126
127
128void delete_string(String* string)
129{
130 free(string->chars);
131 free(string);
132}
133
134String* from_cstring(const char* cstring)
135{
136 String* string = string_with_capacity(strlen(cstring));
137 if(!string)
138 {
139 return NULL;
140 } else {
141 memcpy(string->chars, cstring, strlen(cstring));
142 string->length = strlen(cstring);
143 return string;
144 }
145
146}
147
148String* from_cstring_del(char* cstring)
149{
150 String* ret = from_cstring(cstring);
151 free(cstring);
152 return ret;
153}
154
155char* to_cstring(const String* string)
156{
157 char* cstring = malloc(string->length+1);
158 memcpy(cstring, string->chars, string->length);
159 cstring[string->length] = '\0';
160
161 return cstring;
162}
163
164char* to_cstring_del(String* string)
165{
166 char* ret = to_cstring(string);
167 delete_string(string);
168 return ret;
169}
170