add tool to check extensions.conf files for problems with new expression parser (bug #4491)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5886 65c4cc65-6c06-0410-ace0-fbb531ad65f3

utils/check_expr.c

+#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdlib.h>
+
+int lineno = 1;
+int expr_count = 0;
+int expr_max_size = 0;
+int expr_tot_size = 0;
+int warn_count = 0;
+int OK_count = 0;
+
+int check_expr(char *buffer, char *error_report)
+{
+	char *cp;
+	int oplen = 0;
+	int warn_found = 0;
+
+	error_report[0] = 0;
+	
+	for(cp=buffer;*cp;cp++)
+	{
+		
+		if( *cp == '|' 
+			|| *cp == '&'
+			|| *cp == '='
+			|| *cp == '>'
+			|| *cp == '<'
+			|| *cp == '+'
+			|| *cp == '-'
+			|| *cp == '*'
+			|| *cp == '/'
+			|| *cp == '%'
+			|| *cp == '?'
+			|| *cp == ':'
+			/*	|| *cp == '('
+				|| *cp == ')' These are pretty hard to track, as they are in funcalls, etc. */
+			|| *cp == '"' )
+		{
+			if( *cp == '"' )
+			{
+				/* skip to the other end */
+				cp++;
+				while( *cp && *cp != '"' )
+					cp++;
+				if( *cp == 0 )
+				{
+					fprintf(stderr,"Trouble? Unterminated double quote found at line %d\n",
+							lineno);
+				}
+			}
+			else
+			{
+				if( ((*cp == '>'||*cp == '<' ||*cp=='!') && *(cp+1) == '=' ) )
+				{
+					oplen = 2;
+				}
+				else
+				{
+					oplen = 1;
+				}
+				
+				if( (cp > buffer && *(cp-1) != ' ') || *(cp+oplen) != ' ' )
+				{
+					char tbuf[1000];
+					if( oplen == 1 )
+						sprintf(tbuf,"WARNING: line %d,  '%c' operator not separated by spaces. This may lead to confusion. You may wish to use double quotes to quote the grouping it is in. Please check!\n",
+								lineno, *cp);
+					else
+						sprintf(tbuf,"WARNING: line %d,  '%c%c' operator not separated by spaces. This may lead to confusion. You may wish to use double quotes to quote the grouping it is in. Please check!\n",
+								lineno, *cp, *(cp+1));
+					strcat(error_report,tbuf);
+
+					warn_count++;
+					warn_found++;
+				}
+			}
+		}
+	}
+	return warn_found;
+}
+
+
+void parse_file(char *fname)
+{
+	FILE *f = fopen(fname,"r");
+	FILE *l = fopen("expr2_log","w");
+	int c1;
+	char last_char= 0;
+	char buffer[30000]; /* I sure hope no expr gets this big! */
+	
+	if( !f )
+	{
+		fprintf(stderr,"Couldn't open %s for reading... need an extensions.conf file to parse!\n");
+		exit(20);
+	}
+	if( !l )
+	{
+		fprintf(stderr,"Couldn't open 'expr2_log' file for writing... please fix and re-run!\n");
+		exit(21);
+	}
+	
+	lineno = 1;
+	
+	while( (c1 = fgetc(f)) != EOF )
+	{
+		if( c1 == '\n' )
+			lineno++;
+		else if( c1 == '[' )
+		{
+			if( last_char == '$' )
+			{
+				/* bingo, an expr */
+				int bracklev = 1;
+				int bufcount = 0;
+				int retval;
+				char error_report[30000];
+				
+				while( (c1 = fgetc(f)) != EOF )
+				{
+					if( c1 == '[' )
+						bracklev++;
+					else if( c1 == ']' )
+						bracklev--;
+					if( c1 == '\n' )
+					{
+						fprintf(l, "ERROR-- A newline in an expression? Weird! ...at line %d\n", lineno);
+						fclose(f);
+						fclose(l);
+						printf("--- ERROR --- A newline in the middle of an expression at line %d!\n", lineno);
+					}
+					
+					if( bracklev == 0 )
+						break;
+					buffer[bufcount++] = c1;
+				}
+				if( c1 == EOF )
+				{
+					fprintf(l, "ERROR-- End of File Reached in the middle of an Expr at line %d\n", lineno);
+					fclose(f);
+					fclose(l);
+					printf("--- ERROR --- EOF reached in middle of an expression at line %d!\n", lineno);
+					exit(22);
+				}
+				
+				buffer[bufcount] = 0;
+				/* update stats */
+				expr_tot_size += bufcount;
+				expr_count++;
+				if( bufcount > expr_max_size )
+					expr_max_size = bufcount;
+				
+				retval = check_expr(buffer, error_report); /* check_expr should bump the warning counter */
+				if( retval != 0 )
+				{
+					/* print error report */
+					printf("Warning(s) at line %d, expression: $[%s]; see expr2_log file for details\n", 
+						   lineno, buffer);
+					fprintf(l, "%s", error_report);
+				}
+				else
+				{
+					printf("OK -- $[%s] at line %d\n", buffer, lineno);
+					OK_count++;
+				}
+			}
+		}
+		last_char = c1;
+	}
+	printf("Summary:\n  Expressions detected: %d\n  Expressions OK:  %d\n  Total # Warnings:   %d\n  Longest Expr:   %d chars\n  Ave expr len:  %d chars\n",
+		   expr_count,
+		   OK_count,
+		   warn_count,
+		   expr_max_size,
+		   (expr_count) ? expr_tot_size/expr_count : 0);
+	
+	fclose(f);
+	fclose(l);
+}
+
+
+main(int argc,char **argv)
+{
+	if( argc < 2 )
+	{
+		printf("Hey-- give me a path to an extensions.conf file!\n");
+		exit(19);
+	}
+	
+	parse_file(argv[1]);
+}