1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *******************************************************************************
5 *
6 * Copyright (C) 1998-2012, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 *******************************************************************************
10 *
11 * File ustr.c
12 *
13 * Modification History:
14 *
15 * Date Name Description
16 * 05/28/99 stephen Creation.
17 *******************************************************************************
18 */
19
20 #include "ustr.h"
21 #include "cmemory.h"
22 #include "cstring.h"
23 #include "unicode/ustring.h"
24 #include "unicode/putil.h"
25 #include "unicode/utf16.h"
26
27 /* Protos */
28 static void ustr_resize(struct UString *s, int32_t len, UErrorCode *status);
29
30 /* Macros */
31 #define ALLOCATION(minSize) (minSize < 0x80 ? 0x80 : (2 * minSize + 0x80) & ~(0x80 - 1))
32
33 U_CFUNC void
ustr_init(struct UString * s)34 ustr_init(struct UString *s)
35 {
36 s->fChars = 0;
37 s->fLength = s->fCapacity = 0;
38 }
39
40 U_CFUNC void
ustr_initChars(struct UString * s,const char * source,int32_t length,UErrorCode * status)41 ustr_initChars(struct UString *s, const char* source, int32_t length, UErrorCode *status)
42 {
43 int i = 0;
44 if (U_FAILURE(*status)) return;
45 s->fChars = 0;
46 s->fLength = s->fCapacity = 0;
47 if (length == -1) {
48 length = (int32_t)uprv_strlen(source);
49 }
50 if(s->fCapacity < length) {
51 ustr_resize(s, ALLOCATION(length), status);
52 if(U_FAILURE(*status)) return;
53 }
54 for (; i < length; i++)
55 {
56 UChar charToAppend;
57 u_charsToUChars(source+i, &charToAppend, 1);
58 ustr_ucat(s, charToAppend, status);
59 /*
60 #if U_CHARSET_FAMILY==U_ASCII_FAMILY
61 ustr_ucat(s, (UChar)(uint8_t)(source[i]), status);
62 #elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
63 ustr_ucat(s, (UChar)asciiFromEbcdic[(uint8_t)(*cs++)], status);
64 #else
65 # error U_CHARSET_FAMILY is not valid
66 #endif
67 */
68 }
69 }
70
71 U_CFUNC void
ustr_deinit(struct UString * s)72 ustr_deinit(struct UString *s)
73 {
74 if (s) {
75 uprv_free(s->fChars);
76 s->fChars = 0;
77 s->fLength = s->fCapacity = 0;
78 }
79 }
80
81 U_CFUNC void
ustr_cpy(struct UString * dst,const struct UString * src,UErrorCode * status)82 ustr_cpy(struct UString *dst,
83 const struct UString *src,
84 UErrorCode *status)
85 {
86 if(U_FAILURE(*status) || dst == src)
87 return;
88
89 if(dst->fCapacity < src->fLength) {
90 ustr_resize(dst, ALLOCATION(src->fLength), status);
91 if(U_FAILURE(*status))
92 return;
93 }
94 if(src->fChars == NULL || dst->fChars == NULL){
95 return;
96 }
97 u_memcpy(dst->fChars, src->fChars, src->fLength);
98 dst->fLength = src->fLength;
99 dst->fChars[dst->fLength] = 0x0000;
100 }
101
102 U_CFUNC void
ustr_setlen(struct UString * s,int32_t len,UErrorCode * status)103 ustr_setlen(struct UString *s,
104 int32_t len,
105 UErrorCode *status)
106 {
107 if(U_FAILURE(*status))
108 return;
109
110 if(s->fCapacity < (len + 1)) {
111 ustr_resize(s, ALLOCATION(len), status);
112 if(U_FAILURE(*status))
113 return;
114 }
115
116 s->fLength = len;
117 s->fChars[len] = 0x0000;
118 }
119
120 U_CFUNC void
ustr_cat(struct UString * dst,const struct UString * src,UErrorCode * status)121 ustr_cat(struct UString *dst,
122 const struct UString *src,
123 UErrorCode *status)
124 {
125 ustr_ncat(dst, src, src->fLength, status);
126 }
127
128 U_CFUNC void
ustr_ncat(struct UString * dst,const struct UString * src,int32_t n,UErrorCode * status)129 ustr_ncat(struct UString *dst,
130 const struct UString *src,
131 int32_t n,
132 UErrorCode *status)
133 {
134 if(U_FAILURE(*status) || dst == src)
135 return;
136
137 if(dst->fCapacity < (dst->fLength + n)) {
138 ustr_resize(dst, ALLOCATION(dst->fLength + n), status);
139 if(U_FAILURE(*status))
140 return;
141 }
142
143 uprv_memcpy(dst->fChars + dst->fLength, src->fChars,
144 sizeof(UChar) * n);
145 dst->fLength += src->fLength;
146 dst->fChars[dst->fLength] = 0x0000;
147 }
148
149 U_CFUNC void
ustr_ucat(struct UString * dst,UChar c,UErrorCode * status)150 ustr_ucat(struct UString *dst,
151 UChar c,
152 UErrorCode *status)
153 {
154 if(U_FAILURE(*status))
155 return;
156
157 if(dst->fCapacity < (dst->fLength + 1)) {
158 ustr_resize(dst, ALLOCATION(dst->fLength + 1), status);
159 if(U_FAILURE(*status))
160 return;
161 }
162
163 uprv_memcpy(dst->fChars + dst->fLength, &c,
164 sizeof(UChar) * 1);
165 dst->fLength += 1;
166 dst->fChars[dst->fLength] = 0x0000;
167 }
168 U_CFUNC void
ustr_u32cat(struct UString * dst,UChar32 c,UErrorCode * status)169 ustr_u32cat(struct UString *dst, UChar32 c, UErrorCode *status){
170 if(c > 0x10FFFF){
171 *status = U_ILLEGAL_CHAR_FOUND;
172 return;
173 }
174 if(c >0xFFFF){
175 ustr_ucat(dst, U16_LEAD(c), status);
176 ustr_ucat(dst, U16_TRAIL(c), status);
177 }else{
178 ustr_ucat(dst, (UChar) c, status);
179 }
180 }
181 U_CFUNC void
ustr_uscat(struct UString * dst,const UChar * src,int len,UErrorCode * status)182 ustr_uscat(struct UString *dst,
183 const UChar* src,int len,
184 UErrorCode *status)
185 {
186 if(U_FAILURE(*status))
187 return;
188
189 if(dst->fCapacity < (dst->fLength + len)) {
190 ustr_resize(dst, ALLOCATION(dst->fLength + len), status);
191 if(U_FAILURE(*status))
192 return;
193 }
194
195 uprv_memcpy(dst->fChars + dst->fLength, src,
196 sizeof(UChar) * len);
197 dst->fLength += len;
198 dst->fChars[dst->fLength] = 0x0000;
199 }
200
201 /* Destroys data in the string */
202 static void
ustr_resize(struct UString * s,int32_t len,UErrorCode * status)203 ustr_resize(struct UString *s,
204 int32_t len,
205 UErrorCode *status)
206 {
207 if(U_FAILURE(*status))
208 return;
209
210 /* +1 for trailing 0x0000 */
211 s->fChars = (UChar*) uprv_realloc(s->fChars, sizeof(UChar) * (len + 1));
212 if(s->fChars == 0) {
213 *status = U_MEMORY_ALLOCATION_ERROR;
214 s->fLength = s->fCapacity = 0;
215 return;
216 }
217
218 s->fCapacity = len;
219 }
220