icuSources/tools/genrb/ustr.c

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