reactos/dll/win32/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(ME_IsWSpace(*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   WCHAR *pos = s->szData;
 127   WCHAR ch;
 128   while(ME_IsWSpace(*pos++))
 129     ;
 130   pos--;
 131   while((ch = *pos++) != 0)
 132   {
 133     if (ME_IsWSpace(ch))
 134       return 1;
 135   }
 136   return 0;
 137 }
 138
 139 /* FIXME multibyte */
 140 /*
 141 int ME_CalcSkipChars(ME_String *s)
 142 {
 143   int cnt = 0;
 144   while(cnt < s->nLen && s->szData[s->nLen-1-cnt]==' ')
 145     cnt++;
 146   return cnt;
 147 }
 148 */
 149
 150 int ME_StrLen(ME_String *s) {
 151   return s->nLen;
 152 }
 153
 154 int ME_StrVLen(ME_String *s) {
 155   return s->nLen;
 156 }
 157
 158 /* FIXME we use widechars, not multibytes, inside, no need for complex logic anymore */
 159 int ME_StrRelPos(ME_String *s, int nVChar, int *pRelChars)
 160 {
 161   TRACE("%s,%d,&%d\n", debugstr_w(s->szData), nVChar, *pRelChars);
 162
 163   assert(*pRelChars);
 164   if (!*pRelChars) return nVChar;
 165
 166   if (*pRelChars>0)
 167   {
 168     while(nVChar<s->nLen && *pRelChars>0)
 169     {
 170       nVChar++;
 171       (*pRelChars)--;
 172     }
 173     return nVChar;
 174   }
 175
 176   while(nVChar>0 && *pRelChars<0)
 177   {
 178     nVChar--;
 179     (*pRelChars)++;
 180   }
 181   return nVChar;
 182 }
 183
 184 int ME_StrRelPos2(ME_String *s, int nVChar, int nRelChars)
 185 {
 186   return ME_StrRelPos(s, nVChar, &nRelChars);
 187 }
 188
 189 int ME_VPosToPos(ME_String *s, int nVPos)
 190 {
 191   return nVPos;
 192   /*
 193   int i = 0, len = 0;
 194   if (!nVPos)
 195     return 0;
 196   while (i < s->nLen)
 197   {
 198     if (i == nVPos)
 199       return len;
 200     if (s->szData[i]=='\\') i++;
 201     i++;
 202     len++;
 203   }
 204   return len;
 205   */
 206 }
 207
 208 int ME_PosToVPos(ME_String *s, int nPos)
 209 {
 210   if (!nPos)
 211     return 0;
 212   return ME_StrRelPos2(s, 0, nPos);
 213 }
 214
 215 void ME_StrDeleteV(ME_String *s, int nVChar, int nChars)
 216 {
 217   int end_ofs;
 218
 219   assert(nVChar >=0 && nVChar <= s->nLen);
 220   assert(nChars >= 0);
 221   assert(nVChar+nChars <= s->nLen);
 222
 223   end_ofs = ME_StrRelPos2(s, nVChar, nChars);
 224   assert(end_ofs <= s->nLen);
 225   memmove(s->szData+nVChar, s->szData+end_ofs, 2*(s->nLen+1-end_ofs));
 226   s->nLen -= (end_ofs - nVChar);
 227 }
 228
 229 int ME_GetCharFwd(ME_String *s, int nPos)
 230 {
 231   int nVPos = 0;
 232
 233   assert(nPos < ME_StrLen(s));
 234   if (nPos)
 235     nVPos = ME_StrRelPos2(s, nVPos, nPos);
 236
 237   if (nVPos < s->nLen)
 238     return s->szData[nVPos];
 239   return -1;
 240 }
 241
 242 int ME_GetCharBack(ME_String *s, int nPos)
 243 {
 244   int nVPos = ME_StrVLen(s);
 245
 246   assert(nPos < ME_StrLen(s));
 247   if (nPos)
 248     nVPos = ME_StrRelPos2(s, nVPos, -nPos);
 249
 250   if (nVPos < s->nLen)
 251     return s->szData[nVPos];
 252   return -1;
 253 }
 254
 255 int ME_FindNonWhitespaceV(ME_String *s, int nVChar) {
 256   int i;
 257   for (i = nVChar; i<s->nLen && ME_IsWSpace(s->szData[i]); i++)
 258     ;
 259
 260   return i;
 261 }
 262
 263 /* note: returns offset of the first trailing whitespace */
 264 int ME_ReverseFindNonWhitespaceV(ME_String *s, int nVChar) {
 265   int i;
 266   for (i = nVChar; i>0 && ME_IsWSpace(s->szData[i-1]); i--)
 267     ;
 268
 269   return i;
 270 }
 271
 272 /* note: returns offset of the first trailing nonwhitespace */
 273 int ME_ReverseFindWhitespaceV(ME_String *s, int nVChar) {
 274   int i;
 275   for (i = nVChar; i>0 && !ME_IsWSpace(s->szData[i-1]); i--)
 276     ;
 277
 278   return i;
 279 }
 280
 281 LPWSTR ME_ToUnicode(HWND hWnd, LPVOID psz)
 282 {
 283   if (IsWindowUnicode(hWnd))
 284     return (LPWSTR)psz;
 285   else {
 286     WCHAR *tmp;
 287     int nChars = MultiByteToWideChar(CP_ACP, 0, (char *)psz, -1, NULL, 0);
 288     if((tmp = ALLOC_N_OBJ(WCHAR, nChars)) != NULL)
 289       MultiByteToWideChar(CP_ACP, 0, (char *)psz, -1, tmp, nChars);
 290     return tmp;
 291   }
 292 }
 293
 294 void ME_EndToUnicode(HWND hWnd, LPVOID psz)
 295 {
 296   if (IsWindowUnicode(hWnd))
 297     FREE_OBJ(psz);
 298 }
 299
 300 LPSTR ME_ToAnsi(HWND hWnd, LPVOID psz)
 301 {
 302   if (!IsWindowUnicode(hWnd))
 303     return (LPSTR)psz;
 304   else {
 305     char *tmp;
 306     int nChars = WideCharToMultiByte(CP_ACP, 0, (WCHAR *)psz, -1, NULL, 0, NULL, NULL);
 307     if((tmp = ALLOC_N_OBJ(char, nChars)) != NULL)
 308       WideCharToMultiByte(CP_ACP, 0, (WCHAR *)psz, -1, tmp, nChars, NULL, NULL);
 309     return tmp;
 310   }
 311 }
 312
 313 void ME_EndToAnsi(HWND hWnd, LPVOID psz)
 314 {
 315   if (!IsWindowUnicode(hWnd))
 316     FREE_OBJ(psz);
 317 }