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-rw-r--r--search.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/search.c b/search.c
new file mode 100644
index 0000000..5a7370e
--- /dev/null
+++ b/search.c
@@ -0,0 +1,139 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <string.h>
+#include "search.h"
+#include "buffers.h"
+#include "machine_type.h"
+
+void clearsearch(tSearch* search)
+{
+ memset(search,0,sizeof(tSearch));
+ search->forwardnotbackward=1;
+}
+tInt8 searchfor(tSearch* search,tBuffer* buf,tUInt64* cursorpos,tBool nextnotprev)
+{
+ tInt64 actcursorpos=*cursorpos;
+ tInt64 oldcursorpos=*cursorpos;
+ tBool forward;
+ tBool done;
+ tBool found=0;
+ tFptr fwlog;
+ tFptr frlog;
+ unsigned char c;
+ tInt32 idx;
+ tBool increment;
+ tUInt64 searched=0;
+ int i;
+
+
+ forward=(search->forwardnotbackward==nextnotprev);
+ actcursorpos=actcursorpos+(forward?1:-1);
+ done=0;
+ frlog=NULL;
+ fwlog=NULL;
+ if (buf->bufsize<search->searchlen) oldcursorpos=0;
+ if (search->readsearchlog)
+ {
+ frlog=fopen(search->readlogfilename,"rb");
+
+ if (frlog==NULL) done=1;
+ else if (feof(frlog)) done=1;
+ }
+ if (search->writesearchlog)
+ {
+ fwlog=fopen(search->writelogfilename,"wb");
+
+ if (fwlog==NULL) done=1;
+ else {
+ fprintf(fwlog,"#DHEX SEARCHLOG\n");
+ fprintf(fwlog,"#VERSION 0\n");
+ fprintf(fwlog,"#Search was for");
+ for (i=0;i<search->searchlen;i++)
+ {
+ fprintf(fwlog," %02x",((unsigned int)search->searchstring[i])&0xff);
+ }
+ fprintf(fwlog,"\n");
+ fprintf(fwlog,"#lines are all in hex\n");
+ }
+ }
+ increment=!search->writesearchlog;
+ while (!done && buf->bufsize)
+ {
+ found=0;
+ if (searched++>=buf->bufsize) done=1; // avoid any theoretical infinite loops
+ if (!search->readsearchlog)
+ {
+ if (increment)
+ {
+ actcursorpos=actcursorpos+(forward?1:-1);
+ if (actcursorpos<0) actcursorpos=buf->bufsize-search->searchlen-1;
+ if ((actcursorpos+search->searchlen)>=buf->bufsize) actcursorpos=0;
+ if (actcursorpos==oldcursorpos) done=1;
+ }
+ } else {
+ tUInt8 state=0; // state 0: skip the spaces at the beginning
+ // state 1: collect the number
+ // state 2: read until the end of the line
+ tUInt64 x=0;
+ tBool havenum;
+ tInt64 firstsearchlogpos;
+
+ firstsearchlogpos=search->lastsearchlogpos;
+
+ setfilepos(frlog,search->lastsearchlogpos);
+ havenum=0;
+ while (!done && !havenum)
+ {
+ c=32;
+ x=0;
+ state=0;
+ while (c>=32 && !done)
+ {
+ fread(&c,sizeof(char),1,frlog);
+ done=feof(frlog);
+ if (!done)
+ {
+ if (c=='#') state=2;
+ if (c>='a' && c<='z') c-=32;
+ if (state==0) if ((c>='0' && c<='9') || (c>='A' && c<='F')) state=1;
+ if (state==1)
+ {
+ havenum=1; // this is a valid line
+ if (c>='0' && c<='9')
+ {
+ x<<=4;
+ x|=(c-'0');
+ }
+ else if (c>='A' && c<='F')
+ {
+ x<<=4;
+ x|=(c-'A'+10);
+ } else state=2;
+ }
+ }
+ }
+ }
+ actcursorpos=x;
+ search->lastsearchlogpos=getfilepos(frlog);
+ }
+ increment=1;
+ idx=getbufferidx(buf,actcursorpos);
+ if ((actcursorpos+search->searchlen)<=buf->bufsize)
+ found=(memcmp(&buf->data[idx],search->searchstring,search->searchlen)==0);
+ else found=0;
+ if (found)
+ {
+ search->occurancesfound++;
+ search->lastoccurance=actcursorpos;
+ if (search->writesearchlog) fprintf(fwlog,"%016llx\n",(tUInt64)actcursorpos); else done=1;
+ }
+ }
+ if (frlog) fclose(frlog);
+ if (fwlog) fclose(fwlog);
+ if (found && !search->writesearchlog)
+ {
+ *cursorpos=actcursorpos;
+ }
+ return RETOK;
+}