From fea06605af79832c6abe7a8e6a24c142987994d6 Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周二, 22 10月 2013 17:59:45 +0800
Subject: [PATCH] Add more robust detection of case insensitive string compare
---
libscpi/src/utils.c | 134 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 133 insertions(+), 1 deletions(-)
diff --git a/libscpi/src/utils.c b/libscpi/src/utils.c
index 8880636..355f9ea 100644
--- a/libscpi/src/utils.c
+++ b/libscpi/src/utils.c
@@ -1,5 +1,7 @@
/*-
- * Copyright (c) 2012-2013 Jan Breuer,
+ * Copyright (c) 2013 Jan Breuer
+ * Richard.hmm
+ * Copyright (c) 2012 Jan Breuer
*
* All Rights Reserved
*
@@ -42,6 +44,8 @@
#include "utils.h"
static size_t patternSeparatorShortPos(const char * pattern, size_t len);
+static size_t patternSeparatorPos(const char * pattern, size_t len);
+static size_t cmdSeparatorPos(const char * cmd, size_t len);
/**
* Find the first occurrence in str of a character in set.
@@ -372,6 +376,14 @@
return len;
}
+/**
+ * is colon or not
+ * @param cmd - command
+ * @return
+ */
+static bool_t iscolon(char ch) {
+ return (':' == ch) ? TRUE : FALSE;
+}
/**
* Pattern is composed from upper case an lower case letters. This function
@@ -391,6 +403,41 @@
}
/**
+ * Find pattern separator position
+ * @param pattern
+ * @param len - max search length
+ * @return position of separator or len
+ */
+size_t patternSeparatorPos(const char * pattern, size_t len) {
+
+ char * separator = strnpbrk(pattern, len, "?:[]");
+ if (separator == NULL) {
+ return len;
+ } else {
+ return separator - pattern;
+ }
+}
+
+/**
+ * Find command separator position
+ * @param cmd - input command
+ * @param len - max search length
+ * @return position of separator or len
+ */
+size_t cmdSeparatorPos(const char * cmd, size_t len) {
+ char * separator = strnpbrk(cmd, len, ":?");
+ size_t result;
+ if (separator == NULL) {
+ result = len;
+ } else {
+ result = separator - cmd;
+ }
+
+ return result;
+}
+
+
+/**
* Match pattern and str. Pattern is in format UPPERCASElowercase
* @param pattern
* @param pattern_len
@@ -402,6 +449,73 @@
int pattern_sep_pos_short = patternSeparatorShortPos(pattern, pattern_len);
return compareStr(pattern, pattern_len, str, str_len) ||
compareStr(pattern, pattern_sep_pos_short, str, str_len);
+}
+
+/**
+ * Compare pattern and command
+ * @param pattern
+ * @param cmd - command
+ * @param len - max search length
+ * @return TRUE if pattern matches, FALSE otherwise
+ */
+bool_t matchCommand(const char * pattern, const char * cmd, size_t len) {
+ int result = FALSE;
+
+ const char * pattern_ptr = pattern;
+ int pattern_len = strlen(pattern);
+ const char * pattern_end = pattern + pattern_len;
+
+ const char * cmd_ptr = cmd;
+ size_t cmd_len = SCPI_strnlen(cmd, len);
+ const char * cmd_end = cmd + cmd_len;
+
+ /* TODO: now it is possible to send command ":*IDN?" which is incorrect */
+ if (iscolon(cmd_ptr[0])) {
+ cmd_len --;
+ cmd_ptr ++;
+ }
+
+ while (1) {
+ int pattern_sep_pos = patternSeparatorPos(pattern_ptr, pattern_end - pattern_ptr);
+ int cmd_sep_pos = cmdSeparatorPos(cmd_ptr, cmd_end - cmd_ptr);
+
+ if (matchPattern(pattern_ptr, pattern_sep_pos, cmd_ptr, cmd_sep_pos)) {
+ pattern_ptr = pattern_ptr + pattern_sep_pos;
+ cmd_ptr = cmd_ptr + cmd_sep_pos;
+ result = TRUE;
+
+ /* command is complete */
+ if ((pattern_ptr == pattern_end) && (cmd_ptr >= cmd_end)) {
+ break;
+ }
+
+ /* pattern complete, but command not */
+ if ((pattern_ptr == pattern_end) && (cmd_ptr < cmd_end)) {
+ result = FALSE;
+ break;
+ }
+
+ /* command complete, but pattern not */
+ if (cmd_ptr >= cmd_end) {
+ result = FALSE;
+ break;
+ }
+
+ /* both command and patter contains command separator at this position */
+ if ((pattern_ptr[0] == cmd_ptr[0]) && ((pattern_ptr[0] == ':') || (pattern_ptr[0] == '?'))) {
+ pattern_ptr = pattern_ptr + 1;
+ cmd_ptr = cmd_ptr + 1;
+ } else {
+ result = FALSE;
+ break;
+ }
+ } else {
+ result = FALSE;
+ break;
+ }
+ }
+
+ return result;
}
@@ -425,3 +539,21 @@
}
#endif
+#if !HAVE_STRNCASECMP && !HAVE_STRNICMP
+int OUR_strncasecmp(const char *s1, const char *s2, size_t n) {
+ unsigned char c1, c2;
+
+ for(; n != 0; n--) {
+ c1 = tolower((unsigned char)*s1++);
+ c2 = tolower((unsigned char)*s2++);
+ if (c1 != c2) {
+ return c1 - c2;
+ }
+ if (c1 = '\0') {
+ return 0;
+ }
+ }
+ return 0;
+}
+#endif
+
--
Gitblit v1.9.1