Added !searchreplace preprocessor command for compiletime text search/replaces

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@5852 212acab6-be3b-0410-9dea-997c60f758d6

Docs/src/defines.but

@@ -148,4 +148,13 @@ If \e{/file} is specified, the file is treated as a series of lines. The file is
 \c # search filename.cpp for a line '#define APP_VERSION "2.5"' and set ${VER_MAJOR} to 2, ${VER_MINOR} to 5.
 \c !searchparse /file filename.cpp `#define APP_VERSION "` VER_MAJOR `.` VER_MINOR `"`
 
+\S1{searchreplace} !searchreplace
+
+\c [/ignorecase] symbol_out source_string searchfor replacewith
+
+Searches \e{source_string}, looking for \e{searchfor} and replacing all instances of it with \e{replacewith}. Unlike !define, !searchreplace allows you to redefine \e{symbol_out} without warning or error.
+
+\c # defines ${blah} to "i like ponies"
+\c !searchreplace blah "i love ponies" "love" "like"
+
 

Source/script.cpp

@@ -3076,7 +3076,7 @@ int CEXEBuild::doCommand(int which_token, LineParser &line)
     return PS_OK;
     case TOK_P_ECHO:
       SCRIPT_MSG("%s (%s:%d)\n", line.gettoken_str(1),curfilename,linecnt);
-    return PS_OK;
+    return PS_OK;
     case TOK_P_SEARCHPARSESTRING:
       {
         bool ignCase=false;
@@ -3194,6 +3194,49 @@ int CEXEBuild::doCommand(int which_token, LineParser &line)
         delete list;
       }
     return PS_OK;
+    case TOK_P_SEARCHREPLACESTRING:
+      {
+        int ignoreCase=!stricmp(line.gettoken_str(1),"/ignorecase");
+        if (line.getnumtokens()!=5+ignoreCase) PRINTHELP()
+
+        char *define=line.gettoken_str(1+ignoreCase);
+        char *src = line.gettoken_str(2+ignoreCase);
+        char *search = line.gettoken_str(3+ignoreCase);
+        char *replace = line.gettoken_str(4+ignoreCase);
+        int searchlen=strlen(search);
+        int replacelen=strlen(replace);
+        if (!searchlen)
+        {
+          ERROR_MSG("!searchreplace: search string must not be empty for search/replace!\n");
+          return PS_ERROR;
+        }
+
+        GrowBuf valout;
+
+        while (*src)
+        {
+          if (ignoreCase ? strnicmp(src,search,searchlen) : strncmp(src,search,searchlen)) 
+            valout.add(src++,1);           
+          else
+          {
+            valout.add(replace,replacelen);
+            src+=searchlen;
+          }
+        }
+
+        valout.add("",1);
+       
+        definedlist.del(define); // allow changing variables since we'll often use this in series
+
+        if (definedlist.add(define,(char*)valout.get()))
+        {
+          ERROR_MSG("!searchreplace: error defining \"%s\"!\n",define);
+          return PS_ERROR;
+        }
+        SCRIPT_MSG("!searchreplace: \"%s\"=\"%s\"\n",define,(char*)valout.get());
+
+      }
+    return PS_OK;
 
     case TOK_P_VERBOSE:
     {

Source/tokens.cpp

@@ -258,6 +258,7 @@ static tokenType tokenlist[TOK__LAST] =
 {TOK_P_APPENDFILE,"!appendfile",2,0,"file appended_line",TP_ALL},
 
 {TOK_P_SEARCHPARSESTRING,"!searchparse",3,-1,"[/ignorecase] [/noerrors] [/file] source_string substring OUTPUTSYM1 [substring [OUTPUTSYM2 [substring ...]]]",TP_ALL},
+{TOK_P_SEARCHREPLACESTRING,"!searchreplace",4,1,"[/ignorecase] output_name source_string substring replacestring", TP_ALL},
 
 {TOK_MISCBUTTONTEXT,"MiscButtonText",0,4,"[back button text] [next button text] [cancel button text] [close button text]",TP_GLOBAL},
 {TOK_DETAILSBUTTONTEXT,"DetailsButtonText",0,1,"[details button text]",TP_PG},

Source/tokens.h

@@ -118,6 +118,7 @@ enum
   TOK_P_APPENDFILE,
 
   TOK_P_SEARCHPARSESTRING,
+  TOK_P_SEARCHREPLACESTRING,
 
   // section/function shit
   TOK_SECTION,