first try towards a flex/bison based config parser

1 files changed, 45 insertions, 0 deletions

diff --git a/grammar/utils.c b/grammar/utils.c
new file mode 100644
index 00000000..f9c50bc9
--- /dev/null
+++ b/grammar/utils.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include "libestr.h"
+
+void
+readConfFile(FILE *fp, es_str_t **str)
+{
+	int c;
+	char ln[10240];
+	int len, i;
+	int start;	/* start index of to be submitted text */
+	char *fgetsRet;
+	int bContLine = 0;
+
+	*str = es_newStr(4096);
+
+	while(fgets(ln, sizeof(ln), fp) != NULL) {
+		len = strlen(ln);
+		/* if we are continuation line, we need to drop leading WS */
+		if(bContLine) {
+			for(start = 0 ; start < len && isspace(ln[start]) ; ++start)
+				/* JUST SCAN */;
+		} else {
+			start = 0;
+		}
+		for(i = len - 1 ; i >= start && isspace(ln[i]) ; --i)
+			/* JUST SCAN */;
+		if(i >= 0) {
+			if(ln[i] == '\\') {
+				--i;
+				bContLine = 1;
+			} else {
+				bContLine = 0;
+			}
+			/* add relevant data to buffer */
+			es_addBuf(str, ln+start, i+1 - start);
+			if(!bContLine)
+				es_addChar(str, '\n');
+		}
+	}
+	/* indicate end of buffer to flex */
+	es_addChar(str, '\0');
+	es_addChar(str, '\0');
+}