on the way to adding property-based filters - right before changing

    cfline()

1 files changed, 154 insertions, 0 deletions

diff --git a/parse.c b/parse.c
new file mode 100644
index 00000000..bcf0895b
--- /dev/null
+++ b/parse.c
@@ -0,0 +1,154 @@
+/* parsing routines for the counted string class. for generic
+ * informaton see parse.h.
+ *
+ * begun 2005-09-15 rgerhards
+ *
+ * Copyright 2005
+ *     Rainer Gerhards and Adiscon GmbH. All Rights Reserved.
+ *     This code is placed under the GPL.
+ */
+#include <stdlib.h>
+#include <assert.h>
+#include <ctype.h>
+#include "rsyslog.h"
+#include "parse.h"
+
+/* ################################################################# *
+ * private members                                                   *
+ * ################################################################# */
+
+
+
+/* ################################################################# *
+ * public members                                                    *
+ * ################################################################# */
+
+
+/**
+ * Construct a rsPars object.
+ */
+rsRetVal rsParsConstruct(rsParsObj **ppThis)
+{
+	rsParsObj *pThis;
+
+	assert(ppThis != NULL);
+
+	if((pThis = (rsParsObj*) calloc(1, sizeof(rsParsObj))) == NULL)
+		return RS_RET_OUT_OF_MEMORY;
+
+	rsSETOBJTYPE(pThis, OIDrsPars);
+
+	*ppThis = pThis;
+	return RS_RET_OK;
+}
+
+/**
+ * Assign the to-be-parsed string.
+ */
+rsRetVal rsParsAssignString(rsParsObj *pThis, rsCStrObj *pCStr)
+{
+	rsCHECKVALIDOBJECT(pThis, OIDrsPars);
+	rsCHECKVALIDOBJECT(pCStr, OIDrsCStr);
+	
+	pThis->pCStr = pCStr;
+	pThis->iCurrPos = 0;
+
+	return RS_RET_OK;
+}
+
+/* parse an integer. The parse pointer is advanced */
+rsRetVal parsInt(rsParsObj *pThis, int* pInt)
+{
+	rsCHECKVALIDOBJECT(pThis, OIDrsPars);
+	assert(pInt != NULL);
+
+	return RS_RET_OK;
+}
+
+/* Skip whitespace. Often used to trim parsable entries.
+ * Returns with ParsePointer set to first non-whitespace
+ * character (or at end of string).
+ */
+rsRetVal parsSkipWhitespace(rsParsObj *pThis)
+{
+	register char *pC;
+
+	rsCHECKVALIDOBJECT(pThis, OIDrsPars);
+
+	pC = rsCStrGetBufBeg(pThis->pCStr);
+
+	while(pThis->iCurrPos >= rsCStrLen(pThis->pCStr)) {
+		if(!isspace(*(pC+pThis->iCurrPos)))
+			break;
+		++pThis->iCurrPos;
+	}
+
+	return RS_RET_OK;
+}
+
+/* Parse string up to a delimiter.
+ *
+ * Input:
+ * cDelim - the delimiter
+ *   The following two are for whitespace stripping,
+ *   0 means "no", 1 "yes"
+ *   - bTrimLeading
+ *   - bTrimTrailing
+ * 
+ * Output:
+ * ppCStr Pointer to the parsed string - must be freed by caller!
+ */
+rsRetVal parsDelimCStr(rsParsObj *pThis, rsCStrObj **ppCStr, char cDelim, int bTrimLeading, int bTrimTrailing)
+{
+	register char *pC;
+	rsCStrObj *pCStr;
+	rsRetVal iRet;
+
+	rsCHECKVALIDOBJECT(pThis, OIDrsPars);
+
+	if((pCStr = rsCStrConstruct()) == NULL)
+		return RS_RET_OUT_OF_MEMORY;
+
+	pC = rsCStrGetBufBeg(pThis->pCStr) + pThis->iCurrPos;
+
+	if(bTrimLeading)
+		parsSkipWhitespace(pThis);
+
+	while(pThis->iCurrPos >= rsCStrLen(pThis->pCStr)
+	      && *pC != cDelim) {
+		if((iRet = rsCStrAppendChar(pCStr, *pC)) != RS_RET_OK) {
+			RSFREEOBJ(pCStr);
+			return(iRet);
+		}
+		++pThis->iCurrPos;
+	}
+	
+	/* We got the string, now take it and see if we need to
+	 * remove anything at its end.
+	 */
+	if((iRet = rsCStrFinish(pCStr)) != RS_RET_OK) {
+		RSFREEOBJ(pCStr);
+		return(iRet);
+	}
+
+	if(bTrimTrailing) {
+		if((iRet = rsCStrTrimTrailingWhiteSpace(pCStr)) 
+		   != RS_RET_OK) {
+			RSFREEOBJ(pCStr);
+			return iRet;
+		}
+	}
+
+	/* done! */
+	*ppCStr = pCStr;
+	return RS_RET_OK;
+}
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ *  tab-width: 8
+ * End:
+ * vi:set ai:
+ */