dlls/riched20/string.c

   1 /*
   2  * RichEdit - string operations
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "editor.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  24
  25 int ME_GetOptimalBuffer(int nLen)
  26 {
  27   return ((2*nLen+1)+128)&~63;
  28 }
  29
  30 ME_String *ME_MakeString(LPCWSTR szText)
  31 {
  32   ME_String *s = ALLOC_OBJ(ME_String);
  33   s->nLen = lstrlenW(szText);
  34   s->nBuffer = ME_GetOptimalBuffer(s->nLen+1);
  35   s->szData = ALLOC_N_OBJ(WCHAR, s->nBuffer);
  36   lstrcpyW(s->szData, szText);
  37   return s;
  38 }
  39
  40 ME_String *ME_MakeStringN(LPCWSTR szText, int nMaxChars)
  41 {
  42   ME_String *s = ALLOC_OBJ(ME_String);
  43   int i;
  44   for (i=0; i<nMaxChars && szText[i]; i++)
  45     ;
  46   s->nLen = i;
  47   s->nBuffer = ME_GetOptimalBuffer(s->nLen+1);
  48   s->szData = ALLOC_N_OBJ(WCHAR, s->nBuffer);
  49   lstrcpynW(s->szData, szText, s->nLen+1);
  50   return s;
  51 }
  52
  53 ME_String *ME_StrDup(ME_String *s)
  54 {
  55   return ME_MakeStringN(s->szData, s->nLen);
  56 }
  57
  58 void ME_DestroyString(ME_String *s)
  59 {
  60   FREE_OBJ(s->szData);
  61   FREE_OBJ(s);
  62 }
  63
  64 void ME_AppendString(ME_String *s1, ME_String *s2)
  65 {
  66   if (s1->nLen+s2->nLen+1 <= s1->nBuffer) {
  67     lstrcpyW(s1->szData+s1->nLen, s2->szData);
  68     s1->nLen += s2->nLen;
  69   }
  70   else
  71   {
  72     WCHAR *buf;
  73     s1->nBuffer = ME_GetOptimalBuffer(s1->nLen+s2->nLen+1);
  74
  75     buf = ALLOC_N_OBJ(WCHAR, s1->nBuffer);
  76     lstrcpyW(buf, s1->szData);
  77     lstrcpyW(buf+s1->nLen, s2->szData);
  78     FREE_OBJ(s1->szData);
  79     s1->szData = buf;
  80     s1->nLen += s2->nLen;
  81   }
  82 }
  83
  84 ME_String *ME_ConcatString(ME_String *s1, ME_String *s2)
  85 {
  86   ME_String *s = ALLOC_OBJ(ME_String);
  87   s->nLen = s1->nLen+s2->nLen;
  88   s->nBuffer = ME_GetOptimalBuffer(s1->nLen+s2->nLen+1);
  89   s->szData = ALLOC_N_OBJ(WCHAR, s->nBuffer);
  90   lstrcpyW(s->szData, s1->szData);
  91   lstrcpyW(s->szData+s1->nLen, s2->szData);
  92   return s;
  93 }
  94
  95 ME_String *ME_VSplitString(ME_String *orig, int charidx)
  96 {
  97   ME_String *s;
  98
  99   /*if (charidx<0) charidx = 0;
 100   if (charidx>orig->nLen) charidx = orig->nLen;
 101   */
 102   assert(charidx>=0);
 103   assert(charidx<=orig->nLen);
 104
 105   s = ME_MakeString(orig->szData+charidx);
 106   orig->nLen = charidx;
 107   orig->szData[charidx] = L'\0';
 108   return s;
 109 }
 110
 111 int ME_IsWhitespaces(ME_String *s)
 112 {
 113   /* FIXME multibyte */
 114   WCHAR *pos = s->szData;
 115   while(*pos++ == ' ')
 116     ;
 117   pos--;
 118   if (*pos)
 119     return 0;
 120   else
 121     return 1;
 122 }
 123
 124 int ME_IsSplitable(ME_String *s)
 125 {
 126   /* FIXME multibyte */
 127   WCHAR *pos = s->szData;
 128   WCHAR ch;
 129   while(*pos++ == L' ')
 130     ;
 131   pos--;
 132   while((ch = *pos++) != 0)
 133   {
 134     if (ch == L' ')
 135       return 1;
 136   }
 137   return 0;
 138 }
 139
 140 /* FIXME multibyte */
 141 /*
 142 int ME_CalcSkipChars(ME_String *s)
 143 {
 144   int cnt = 0;
 145   while(cnt < s->nLen && s->szData[s->nLen-1-cnt]==' ')
 146     cnt++;
 147   return cnt;
 148 }
 149 */
 150
 151 int ME_StrLen(ME_String *s) {
 152   return s->nLen;
 153 }
 154
 155 int ME_StrVLen(ME_String *s) {
 156   return s->nLen;
 157 }
 158
 159 /* FIXME we use widechars, not multibytes, inside, no need for complex logic anymore */
 160 int ME_StrRelPos(ME_String *s, int nVChar, int *pRelChars)
 161 {
 162   TRACE("%s,%d,&%d\n", debugstr_w(s->szData), nVChar, *pRelChars);
 163
 164   assert(*pRelChars);
 165   if (!*pRelChars) return nVChar;
 166
 167   if (*pRelChars>0)
 168   {
 169     while(nVChar<s->nLen && *pRelChars>0)
 170     {
 171       nVChar++;
 172       (*pRelChars)--;
 173     }
 174     return nVChar;
 175   }
 176
 177   while(nVChar>0 && *pRelChars<0)
 178   {
 179     nVChar--;
 180     (*pRelChars)++;
 181   }
 182   return nVChar;
 183 }
 184
 185 int ME_StrRelPos2(ME_String *s, int nVChar, int nRelChars)
 186 {
 187   return ME_StrRelPos(s, nVChar, &nRelChars);
 188 }
 189
 190 int ME_VPosToPos(ME_String *s, int nVPos)
 191 {
 192   return nVPos;
 193   /*
 194   int i = 0, len = 0;
 195   if (!nVPos)
 196     return 0;
 197   while (i < s->nLen)
 198   {
 199     if (i == nVPos)
 200       return len;
 201     if (s->szData[i]=='\\') i++;
 202     i++;
 203     len++;
 204   }
 205   return len;
 206   */
 207 }
 208
 209 int ME_PosToVPos(ME_String *s, int nPos)
 210 {
 211   if (!nPos)
 212     return 0;
 213   return ME_StrRelPos2(s, 0, nPos);
 214 }
 215
 216 void ME_StrDeleteV(ME_String *s, int nVChar, int nChars)
 217 {
 218   int end_ofs;
 219
 220   assert(nVChar >=0 && nVChar <= s->nLen);
 221   assert(nChars >= 0);
 222   assert(nVChar+nChars <= s->nLen);
 223
 224   end_ofs = ME_StrRelPos2(s, nVChar, nChars);
 225   assert(end_ofs <= s->nLen);
 226   memmove(s->szData+nVChar, s->szData+end_ofs, 2*(s->nLen+1-end_ofs));
 227   s->nLen -= (end_ofs - nVChar);
 228 }
 229
 230 int ME_GetCharFwd(ME_String *s, int nPos)
 231 {
 232   int nVPos = 0;
 233
 234   assert(nPos < ME_StrLen(s));
 235   if (nPos)
 236     nVPos = ME_StrRelPos2(s, nVPos, nPos);
 237
 238   if (nVPos < s->nLen)
 239     return s->szData[nVPos];
 240   return -1;
 241 }
 242
 243 int ME_GetCharBack(ME_String *s, int nPos)
 244 {
 245   int nVPos = ME_StrVLen(s);
 246
 247   assert(nPos < ME_StrLen(s));
 248   if (nPos)
 249     nVPos = ME_StrRelPos2(s, nVPos, -nPos);
 250
 251   if (nVPos < s->nLen)
 252     return s->szData[nVPos];
 253   return -1;
 254 }
 255
 256 int ME_FindNonWhitespaceV(ME_String *s, int nVChar) {
 257   int i;
 258   for (i = nVChar; isspace(s->szData[i]) && i<s->nLen; i++)
 259     ;
 260
 261   return i;
 262 }
 263
 264 /* note: returns offset of the first trailing whitespace */
 265 int ME_ReverseFindNonWhitespaceV(ME_String *s, int nVChar) {
 266   int i;
 267   for (i = nVChar; i>0 && isspace(s->szData[i-1]); i--)
 268     ;
 269
 270   return i;
 271 }
 272
 273 /* note: returns offset of the first trailing nonwhitespace */
 274 int ME_ReverseFindWhitespaceV(ME_String *s, int nVChar) {
 275   int i;
 276   for (i = nVChar; i>0 && !isspace(s->szData[i-1]); i--)
 277     ;
 278
 279   return i;
 280 }
 281
 282 LPWSTR ME_ToUnicode(HWND hWnd, LPVOID psz)
 283 {
 284   if (IsWindowUnicode(hWnd))
 285     return (LPWSTR)psz;
 286   else {
 287     WCHAR *tmp;
 288     int nChars = MultiByteToWideChar(CP_ACP, 0, (char *)psz, -1, NULL, 0);
 289     if((tmp = ALLOC_N_OBJ(WCHAR, nChars)) != NULL)
 290       MultiByteToWideChar(CP_ACP, 0, (char *)psz, -1, tmp, nChars);
 291     return tmp;
 292   }
 293 }
 294
 295 void ME_EndToUnicode(HWND hWnd, LPVOID psz)
 296 {
 297   if (IsWindowUnicode(hWnd))
 298     FREE_OBJ(psz);
 299 }
 300
 301 LPSTR ME_ToAnsi(HWND hWnd, LPVOID psz)
 302 {
 303   if (!IsWindowUnicode(hWnd))
 304     return (LPSTR)psz;
 305   else {
 306     char *tmp;
 307     int nChars = WideCharToMultiByte(CP_ACP, 0, (WCHAR *)psz, -1, NULL, 0, NULL, NULL);
 308     if((tmp = ALLOC_N_OBJ(char, nChars)) != NULL)
 309       WideCharToMultiByte(CP_ACP, 0, (WCHAR *)psz, -1, tmp, nChars, NULL, NULL);
 310     return tmp;
 311   }
 312 }
 313
 314 void ME_EndToAnsi(HWND hWnd, LPVOID psz)
 315 {
 316   if (!IsWindowUnicode(hWnd))
 317     FREE_OBJ(psz);
 318 }