From be3350c620036306fb5f2db3535cb110f187d5e8 Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周三, 24 9月 2014 23:46:36 +0800
Subject: [PATCH] Refactor token_t and token_type_t to have scpi_ prefix
---
libscpi/src/utils.c | 401 ++++++++++++++++++++++++++++++++++++--------------------
1 files changed, 257 insertions(+), 144 deletions(-)
diff --git a/libscpi/src/utils.c b/libscpi/src/utils.c
index 63051f5..922b870 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
*
@@ -39,9 +41,11 @@
#include <string.h>
#include <ctype.h>
-#include "utils.h"
+#include "utils_private.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.
@@ -70,7 +74,9 @@
* @param len string buffer length
* @return number of bytes written to str (without '\0')
*/
-size_t longToStr(int32_t val, char * str, size_t len) {
+// TODO: add support for other bases
+
+size_t longToStr(int32_t val, char * str, size_t len, int8_t base) {
uint32_t x = 1000000000L;
int_fast8_t digit;
size_t pos = 0;
@@ -116,9 +122,9 @@
* @param val 32bit integer result
* @return number of bytes used in string
*/
-size_t strToLong(const char * str, int32_t * val) {
+size_t strToLong(const char * str, int32_t * val, int8_t base) {
char * endptr;
- *val = strtol(str, &endptr, 0);
+ *val = strtol(str, &endptr, base);
return endptr - str;
}
@@ -142,156 +148,46 @@
* @param len2
* @return TRUE if len1==len2 and "len" characters of both strings are equal
*/
-bool_t compareStr(const char * str1, size_t len1, const char * str2, size_t len2) {
+scpi_bool_t compareStr(const char * str1, size_t len1, const char * str2, size_t len2) {
if (len1 != len2) {
return FALSE;
}
- if (strncasecmp(str1, str2, len2) == 0) {
+ if (SCPI_strncasecmp(str1, str2, len2) == 0) {
return TRUE;
}
return FALSE;
}
-bool_t locateText(const char * str1, size_t len1, char ** str2, size_t * len2) {
+/**
+ * Compare two strings, one be longer but may contains only numbers in that section
+ * @param str1
+ * @param len1
+ * @param str2
+ * @param len2
+ * @return TRUE if strings match
+ */
+scpi_bool_t compareStrAndNum(const char * str1, size_t len1, const char * str2, size_t len2) {
+ scpi_bool_t result = FALSE;
size_t i;
- int quot = 0;
- int32_t strStart = -1;
- int32_t strStop = -1;
- int valid = 0;
+ if (len2 < len1) {
+ return FALSE;
+ }
- for (i = 0; i < len1; i++) {
- if ((strStart < 0) && isspace((unsigned char)str1[i])) {
- continue;
- }
+ if (SCPI_strncasecmp(str1, str2, len1) == 0) {
+ result = TRUE;
+ }
- if ((strStart < 0) && !quot && (str1[i] == '"')) {
- quot = 1;
- continue;
- }
-
- if (strStart < 0) {
- strStart = i;
- }
-
- if ((strStop < 0) && quot && (str1[i] == '"')) {
- strStop = i;
- valid = 1;
- continue;
- }
-
- if ((strStop >= 0) && quot && (str1[i] == ',')) {
- break;
- }
-
- if ((strStop >= 0) && quot && !isspace((unsigned char)str1[i])) {
- valid = 0;
- }
-
- if (!quot && !isspace((unsigned char)str1[i]) && (str1[i] != ',')) {
- strStop = i;
- }
-
- if (isspace((unsigned char)str1[i])) {
- continue;
- }
-
- if ((strStop >= 0) && (str1[i] == ',')) {
- valid = 1;
+ for (i = len1; i<len2; i++) {
+ if (!isdigit(str2[i])) {
+ result = FALSE;
break;
}
}
- if ((i == len1) && !quot) {
- valid = 1;
- if (strStop < 0) {
- strStop = i;
- } else {
- strStop++;
- }
- if (strStart < 0) {
- strStart = i;
- }
- } else if (!quot) {
- strStop++;
- }
-
-
- if (valid) {
- if (str2) {
- *str2 = (char *) &str1[strStart];
- }
-
- if (len2) {
- *len2 = strStop - strStart;
- }
- }
-
- return valid;
-}
-
-bool_t locateStr(const char * str1, size_t len1, char ** str2, size_t * len2) {
- size_t i;
- int32_t strStart = -1;
- int32_t strStop = -1;
- int valid = 0;
-
-
- for (i = 0; i < len1; i++) {
- if ((strStart < 0) && isspace((unsigned char)str1[i])) {
- continue;
- }
-
- if (strStart < 0) {
- strStart = i;
- }
-
- if (!isspace((unsigned char)str1[i]) && (str1[i] != ',')) {
- strStop = i;
- }
-
- if (isspace((unsigned char)str1[i])) {
- continue;
- }
-
- if (str1[i] == ',') {
- valid = 1;
-
- if (strStop < 0) {
- strStop = i;
- }
- break;
- }
- }
-
- if (i == len1) {
- valid = 1;
- if (strStop < 0) {
- strStop = i;
- } else {
- strStop++;
- }
- if (strStart < 0) {
- strStart = i;
- }
- } else {
- strStop++;
- }
-
-
- if (valid) {
- if (str2) {
- *str2 = (char *) &str1[strStart];
- }
-
- if (len2) {
- *len2 = strStop - strStart;
- }
- }
-
- return valid;
+ return result;
}
/**
@@ -303,13 +199,12 @@
size_t skipWhitespace(const char * cmd, size_t len) {
size_t i;
for (i = 0; i < len; i++) {
- if (!isspace((unsigned char)cmd[i])) {
+ if (!isspace((unsigned char) cmd[i])) {
return i;
}
}
return len;
}
-
/**
* Pattern is composed from upper case an lower case letters. This function
@@ -321,11 +216,45 @@
size_t patternSeparatorShortPos(const char * pattern, size_t len) {
size_t i;
for (i = 0; (i < len) && pattern[i]; i++) {
- if (islower((unsigned char)pattern[i])) {
+ if (islower((unsigned char) pattern[i])) {
return i;
}
}
return i;
+}
+
+/**
+ * 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;
}
/**
@@ -336,8 +265,192 @@
* @param str_len
* @return
*/
-bool_t matchPattern(const char * pattern, size_t pattern_len, const char * str, size_t str_len) {
- 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);
+scpi_bool_t matchPattern(const char * pattern, size_t pattern_len, const char * str, size_t str_len) {
+ int pattern_sep_pos_short;
+
+ if (pattern[pattern_len - 1] == '#') {
+ size_t new_pattern_len = pattern_len - 1;
+
+ pattern_sep_pos_short = patternSeparatorShortPos(pattern, new_pattern_len);
+
+ return compareStrAndNum(pattern, new_pattern_len, str, str_len) ||
+ compareStrAndNum(pattern, pattern_sep_pos_short, str, str_len);
+ } else {
+
+ 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 eg. [:MEASure]:VOLTage:DC?
+ * @param cmd - command
+ * @param len - max search length
+ * @return TRUE if pattern matches, FALSE otherwise
+ */
+scpi_bool_t matchCommand(const char * pattern, const char * cmd, size_t len) {
+ scpi_bool_t result = FALSE;
+ int leftFlag = 0; // flag for '[' on left
+ int rightFlag = 0; // flag for ']' on right
+ int cmd_sep_pos = 0;
+
+ 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;
+
+ /* now support optional keywords in pattern style, e.g. [:MEASure]:VOLTage:DC? */
+ if (pattern_ptr[0] == '[') { // skip first '['
+ pattern_len--;
+ pattern_ptr++;
+ leftFlag++;
+ }
+ if (pattern_ptr[0] == ':') { // skip first ':'
+ pattern_len--;
+ pattern_ptr++;
+ }
+
+ if (cmd_ptr[0] == ':') {
+ /* handle errornouse ":*IDN?" */
+ if((cmd_len >= 2) && (cmd_ptr[1] != '*')) {
+ cmd_len--;
+ cmd_ptr++;
+ }
+ }
+
+ while (1) {
+ int pattern_sep_pos = patternSeparatorPos(pattern_ptr, pattern_end - pattern_ptr);
+
+ if ((leftFlag > 0) && (rightFlag > 0)) {
+ leftFlag--;
+ rightFlag--;
+ } else {
+ 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) {
+ if (cmd_end == cmd_ptr) {
+ if (cmd_ptr[0] == pattern_ptr[pattern_end - pattern_ptr - 1]) {
+ break; /* exist optional keyword, command is complete */
+ }
+ if (']' == pattern_ptr[pattern_end - pattern_ptr - 1]) {
+ break; /* exist optional keyword, command is complete */
+ }
+ }
+ 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 if ((pattern_ptr[1] == cmd_ptr[0])
+ && (pattern_ptr[0] == '[')
+ && (pattern_ptr[1] == ':')) {
+ pattern_ptr = pattern_ptr + 2; // for skip '[' in "[:"
+ cmd_ptr = cmd_ptr + 1;
+ leftFlag++;
+ } else if ((pattern_ptr[1] == cmd_ptr[0])
+ && (pattern_ptr[0] == ']')
+ && (pattern_ptr[1] == ':')) {
+ pattern_ptr = pattern_ptr + 2; // for skip ']' in "]:"
+ cmd_ptr = cmd_ptr + 1;
+ } else if ((pattern_ptr[2] == cmd_ptr[0])
+ && (pattern_ptr[0] == ']')
+ && (pattern_ptr[1] == '[')
+ && (pattern_ptr[2] == ':')) {
+ pattern_ptr = pattern_ptr + 3; // for skip '][' in "][:"
+ cmd_ptr = cmd_ptr + 1;
+ leftFlag++;
+ } else if (((pattern_ptr[0] == ']')
+ || (pattern_ptr[0] == '['))
+ && (*(pattern_end - 1) == '?') // last is '?'
+ && (cmd_ptr[0] == '?')) {
+ result = TRUE; // exist optional keyword, and they are end with '?'
+ break; // command is complete OK
+ } else {
+ result = FALSE;
+ break;
+ }
+ } else {
+ pattern_ptr = pattern_ptr + pattern_sep_pos;
+ if ((pattern_ptr[0] == ']') && (pattern_ptr[1] == ':')) {
+ pattern_ptr = pattern_ptr + 2; // for skip ']' in "]:" , pattern_ptr continue, while cmd_ptr remain unchanged
+ rightFlag++;
+ } else if ((pattern_ptr[0] == ']')
+ && (pattern_ptr[1] == '[')
+ && (pattern_ptr[2] == ':')) {
+ pattern_ptr = pattern_ptr + 3; // for skip ']' in "][:" , pattern_ptr continue, while cmd_ptr remain unchanged
+ rightFlag++;
+ } else {
+ result = FALSE;
+ break;
+ }
+ }
+ }
+
+ return result;
+}
+
+
+#if !HAVE_STRNLEN
+/* use FreeBSD strnlen */
+
+/*-
+ * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
+ * All rights reserved.
+ */
+size_t
+BSD_strnlen(const char *s, size_t maxlen) {
+ size_t len;
+
+ for (len = 0; len < maxlen; len++, s++) {
+ if (!*s)
+ break;
+ }
+ return (len);
+}
+#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
+
--
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