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-rw-r--r--1.4.23-rc4/utils/check_expr.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/1.4.23-rc4/utils/check_expr.c b/1.4.23-rc4/utils/check_expr.c
new file mode 100644
index 000000000..d3dcc5d19
--- /dev/null
+++ b/1.4.23-rc4/utils/check_expr.c
@@ -0,0 +1,355 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2005, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+#include <../include/asterisk/ast_expr.h>
+
+static int global_lineno = 1;
+static int global_expr_count=0;
+static int global_expr_max_size=0;
+static int global_expr_tot_size=0;
+static int global_warn_count=0;
+static int global_OK_count=0;
+
+struct varz
+{
+ char varname[100]; /* a really ultra-simple, space-wasting linked list of var=val data */
+ char varval[1000]; /* if any varname is bigger than 100 chars, or val greater than 1000, then **CRASH** */
+ struct varz *next;
+};
+
+struct varz *global_varlist;
+
+/* Our own version of ast_log, since the expr parser uses it. */
+
+void ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...) __attribute__((format(printf,5,6)));
+
+void ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...)
+{
+ va_list vars;
+ va_start(vars,fmt);
+
+ printf("LOG: lev:%d file:%s line:%d func: %s ",
+ level, file, line, function);
+ vprintf(fmt, vars);
+ fflush(stdout);
+ va_end(vars);
+}
+void ast_register_file_version(const char *file, const char *version);
+void ast_unregister_file_version(const char *file);
+
+char *find_var(const char *varname);
+void set_var(const char *varname, const char *varval);
+unsigned int check_expr(char* buffer, char* error_report);
+int check_eval(char *buffer, char *error_report);
+void parse_file(const char *fname);
+
+void ast_register_file_version(const char *file, const char *version)
+{
+}
+
+void ast_unregister_file_version(const char *file)
+{
+}
+
+char *find_var(const char *varname) /* the list should be pretty short, if there's any list at all */
+{
+ struct varz *t;
+ for (t= global_varlist; t; t = t->next) {
+ if (!strcmp(t->varname, varname)) {
+ return t->varval;
+ }
+ }
+ return 0;
+}
+
+void set_var(const char *varname, const char *varval)
+{
+ struct varz *t = (struct varz*)calloc(1,sizeof(struct varz));
+ strcpy(t->varname, varname);
+ strcpy(t->varval, varval);
+ t->next = global_varlist;
+ global_varlist = t;
+}
+
+unsigned int check_expr(char* buffer, char* error_report)
+{
+ char* cp;
+ unsigned int warn_found = 0;
+
+ error_report[0] = 0;
+
+ for (cp = buffer; *cp; ++cp)
+ {
+ switch (*cp)
+ {
+ case '"':
+ /* skip to the other end */
+ while (*(++cp) && *cp != '"') ;
+
+ if (*cp == 0)
+ {
+ fprintf(stderr,
+ "Trouble? Unterminated double quote found at line %d\n",
+ global_lineno);
+ }
+ break;
+
+ case '>':
+ case '<':
+ case '!':
+ if ( (*(cp + 1) == '=')
+ && ( ( (cp > buffer) && (*(cp - 1) != ' ') ) || (*(cp + 2) != ' ') ) )
+ {
+ char msg[200];
+ snprintf(msg,
+ sizeof(msg),
+ "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",
+ global_lineno, *cp, *(cp + 1));
+ strcat(error_report, msg);
+ ++global_warn_count;
+ ++warn_found;
+ }
+ break;
+
+ case '|':
+ case '&':
+ case '=':
+ case '+':
+ case '-':
+ case '*':
+ case '/':
+ case '%':
+ case '?':
+ case ':':
+ if ( ( (cp > buffer) && (*(cp - 1) != ' ') ) || (*(cp + 1) != ' ') )
+ {
+ char msg[200];
+ snprintf(msg,
+ sizeof(msg),
+ "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",
+ global_lineno, *cp );
+ strcat(error_report, msg);
+ ++global_warn_count;
+ ++warn_found;
+ }
+ break;
+ }
+ }
+
+ return warn_found;
+}
+
+int check_eval(char *buffer, char *error_report)
+{
+ char *cp, *ep;
+ char s[4096];
+ char evalbuf[80000];
+ int result;
+
+ error_report[0] = 0;
+ ep = evalbuf;
+
+ for (cp=buffer;*cp;cp++) {
+ if (*cp == '$' && *(cp+1) == '{') {
+ int brack_lev = 1;
+ char *xp= cp+2;
+
+ while (*xp) {
+ if (*xp == '{')
+ brack_lev++;
+ else if (*xp == '}')
+ brack_lev--;
+
+ if (brack_lev == 0)
+ break;
+ xp++;
+ }
+ if (*xp == '}') {
+ char varname[200];
+ char *val;
+
+ strncpy(varname,cp+2, xp-cp-2);
+ varname[xp-cp-2] = 0;
+ cp = xp;
+ val = find_var(varname);
+ if (val) {
+ char *z = val;
+ while (*z)
+ *ep++ = *z++;
+ }
+ else {
+ *ep++ = '5'; /* why not */
+ *ep++ = '5';
+ *ep++ = '5';
+ }
+ }
+ else {
+ printf("Unterminated variable reference at line %d\n", global_lineno);
+ *ep++ = *cp;
+ }
+ }
+ else if (*cp == '\\') {
+ /* braindead simple elim of backslash */
+ cp++;
+ *ep++ = *cp;
+ }
+ else
+ *ep++ = *cp;
+ }
+ *ep++ = 0;
+
+ /* now, run the test */
+ result = ast_expr(evalbuf, s, sizeof(s));
+ if (result) {
+ sprintf(error_report,"line %d, evaluation of $[ %s ] result: %s\n", global_lineno, evalbuf, s);
+ return 1;
+ } else {
+ sprintf(error_report,"line %d, evaluation of $[ %s ] result: ****SYNTAX ERROR****\n", global_lineno, evalbuf);
+ return 1;
+ }
+}
+
+
+void parse_file(const char *fname)
+{
+ FILE *f = fopen(fname,"r");
+ FILE *l = fopen("expr2_log","w");
+ int c1;
+ char last_char= 0;
+ char buffer[30000]; /* I sure hope no expr gets this big! */
+
+ if (!f) {
+ fprintf(stderr,"Couldn't open %s for reading... need an extensions.conf file to parse!\n",fname);
+ exit(20);
+ }
+ if (!l) {
+ fprintf(stderr,"Couldn't open 'expr2_log' file for writing... please fix and re-run!\n");
+ exit(21);
+ }
+
+ global_lineno = 1;
+
+ while ((c1 = fgetc(f)) != EOF) {
+ if (c1 == '\n')
+ global_lineno++;
+ else if (c1 == '[') {
+ if (last_char == '$') {
+ /* 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", global_lineno);
+ fclose(f);
+ fclose(l);
+ printf("--- ERROR --- A newline in the middle of an expression at line %d!\n", global_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", global_lineno);
+ fclose(f);
+ fclose(l);
+ printf("--- ERROR --- EOF reached in middle of an expression at line %d!\n", global_lineno);
+ exit(22);
+ }
+
+ buffer[bufcount] = 0;
+ /* update stats */
+ global_expr_tot_size += bufcount;
+ global_expr_count++;
+ if (bufcount > global_expr_max_size)
+ global_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",
+ global_lineno, buffer);
+ fprintf(l, "%s", error_report);
+ }
+ else {
+ printf("OK -- $[%s] at line %d\n", buffer, global_lineno);
+ global_OK_count++;
+ }
+ error_report[0] = 0;
+ retval = check_eval(buffer, error_report);
+ fprintf(l, "%s", error_report);
+ }
+ }
+ 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",
+ global_expr_count,
+ global_OK_count,
+ global_warn_count,
+ global_expr_max_size,
+ (global_expr_count) ? global_expr_tot_size/global_expr_count : 0);
+
+ fclose(f);
+ fclose(l);
+}
+
+
+int main(int argc,char **argv)
+{
+ int argc1;
+ char *eq;
+
+ if (argc < 2) {
+ printf("check_expr -- a program to look thru extensions.conf files for $[...] expressions,\n");
+ printf(" and run them thru the parser, looking for problems\n");
+ printf("Hey-- give me a path to an extensions.conf file!\n");
+ printf(" You can also follow the file path with a series of variable decls,\n");
+ printf(" of the form, varname=value, each separated from the next by spaces.\n");
+ printf(" (this might allow you to avoid division by zero messages, check that math\n");
+ printf(" is being done correctly, etc.)\n");
+ printf(" Note that messages about operators not being surrounded by spaces is merely to alert\n");
+ printf(" you to possible problems where you might be expecting those operators as part of a string.\n");
+ printf(" (to include operators in a string, wrap with double quotes!)\n");
+
+ exit(19);
+ }
+ global_varlist = 0;
+ for (argc1=2;argc1 < argc; argc1++) {
+ if ((eq = strchr(argv[argc1],'='))) {
+ *eq = 0;
+ set_var(argv[argc1],eq+1);
+ }
+ }
+
+ /* parse command args for x=y and set varz */
+
+ parse_file(argv[1]);
+ return 0;
+}
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