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- /*
- *******************************************************************************
- * *
- * COPYRIGHT: *
- * (C) Copyright International Business Machines Corporation, 1998, 1999 *
- * Licensed Material - Program-Property of IBM - All Rights Reserved. *
- * US Government Users Restricted Rights - Use, duplication, or disclosure *
- * restricted by GSA ADP Schedule Contract with IBM Corp. *
- * *
- *******************************************************************************
- *
- * File ustr.c
- *
- * Modification History:
- *
- * Date Name Description
- * 05/28/99 stephen Creation.
- *******************************************************************************
- */
-
- #include "ustr.h"
- #include "cmemory.h"
-
- /* Protos */
- static void ustr_resize(struct UString *s, int32_t len, UErrorCode *status);
-
- /* Macros */
- #define ALLOCATION(minSize) (minSize < 0x80 ? 0x80 : (2 * minSize + 0x80) & ~(0x80 - 1))
-
- void
- ustr_init(struct UString *s)
- {
- s->fChars = 0;
- s->fLength = s->fCapacity = 0;
- }
-
- void
- ustr_deinit(struct UString *s)
- {
- icu_free(s->fChars);
- s->fChars = 0;
- s->fLength = s->fCapacity = 0;
- }
-
- void
- ustr_cpy(struct UString *dst,
- const struct UString *src,
- UErrorCode *status)
- {
- if(U_FAILURE(*status) || dst == src) return;
-
- if(dst->fCapacity < src->fLength) {
- ustr_resize(dst, ALLOCATION(src->fLength), status);
- if(U_FAILURE(*status)) return;
- }
-
- icu_memcpy(dst->fChars, src->fChars, sizeof(UChar) * src->fLength);
- dst->fLength = src->fLength;
- dst->fChars[dst->fLength] = 0x0000;
- }
-
- void
- ustr_setlen(struct UString *s,
- int32_t len,
- UErrorCode *status)
- {
- if(U_FAILURE(*status)) return;
-
- if(s->fCapacity < (len + 1)) {
- ustr_resize(s, ALLOCATION(len), status);
- if(U_FAILURE(*status)) return;
- }
-
- s->fLength = len;
- s->fChars[len] = 0x0000;
- }
-
- void
- ustr_cat(struct UString *dst,
- const struct UString *src,
- UErrorCode *status)
- {
- ustr_ncat(dst, src, src->fLength, status);
- }
-
- void
- ustr_ncat(struct UString *dst,
- const struct UString *src,
- int32_t n,
- UErrorCode *status)
- {
- if(U_FAILURE(*status) || dst == src) return;
-
- if(dst->fCapacity < (dst->fLength + n)) {
- ustr_resize(dst, ALLOCATION(dst->fLength + n), status);
- if(U_FAILURE(*status)) return;
- }
-
- icu_memcpy(dst->fChars + dst->fLength, src->fChars,
- sizeof(UChar) * n);
- dst->fLength += src->fLength;
- dst->fChars[dst->fLength] = 0x0000;
- }
-
- void
- ustr_ucat(struct UString *dst,
- UChar c,
- UErrorCode *status)
- {
- if(U_FAILURE(*status)) return;
-
- if(dst->fCapacity < (dst->fLength + 1)) {
- ustr_resize(dst, ALLOCATION(dst->fLength + 1), status);
- if(U_FAILURE(*status)) return;
- }
-
- icu_memcpy(dst->fChars + dst->fLength, &c,
- sizeof(UChar) * 1);
- dst->fLength += 1;
- dst->fChars[dst->fLength] = 0x0000;
- }
-
- /* Destroys data in the string */
- static void
- ustr_resize(struct UString *s,
- int32_t len,
- UErrorCode *status)
- {
- if(U_FAILURE(*status)) return;
-
- /* +1 for trailing 0x0000 */
- s->fChars = (UChar*) icu_realloc(s->fChars, sizeof(UChar) * (len + 1));
- if(s->fChars == 0) {
- *status = U_MEMORY_ALLOCATION_ERROR;
- s->fChars = 0;
- s->fLength = s->fCapacity = 0;
- return;
- }
-
- s->fCapacity = len;
- }
-