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+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2006-2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Break up a delimited string into a vector of substrings */
+
+#include <stdio.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/hash.h>
+#include <stdarg.h>
+
+/*
+ * #define UNIT_TESTS 1
+ * #define MATCH_TRACE 1
+ */
+
+/*
+ * delsvec
+ * break up an input string into a vector of [null-terminated] u8 *'s
+ *
+ * Each supplied delimiter character results in a string in the output
+ * vector, unless the delimiters occur back-to-back. When matched,
+ * a whitespace character in the delimiter consumes an arbitrary
+ * run of whitespace. See the unit tests at the end of this file
+ * for a set of examples.
+ *
+ * Returns a u8 **, or NULL if the input fails to match. It is assumed
+ * that both input and fmt are C strings, not necessarily vectors.
+ *
+ * Output strings are both vectors and proper C strings.
+ */
+
+static u8 **string_cache;
+static u8 **svec_cache;
+
+void delsvec_recycle_this_string (u8 *s)
+{
+ if (s) {
+ _vec_len (s) = 0;
+ vec_add1(string_cache, s);
+ }
+}
+
+void delsvec_recycle_this_svec (u8 **svec)
+{
+ if (svec) {
+ if (svec_cache) {
+ vec_free (svec_cache);
+ }
+ _vec_len (svec) = 0;
+ svec_cache = svec;
+ }
+}
+
+int pvl (char *a)
+{
+ return vec_len(a);
+}
+
+u8 **delsvec(void *input_arg, char *fmt)
+{
+ u8 **rv = 0;
+ int input_index=0;
+ u8 *this;
+ int dirflag=0;
+ int i;
+ u8 *input = input_arg;
+
+ if (svec_cache) {
+ rv = svec_cache;
+ svec_cache = 0;
+ }
+
+ while (fmt) {
+ dirflag=0;
+ if (vec_len (string_cache) > 0) {
+ this = string_cache [vec_len(string_cache)-1];
+ _vec_len (string_cache) = vec_len (string_cache) - 1;
+ } else
+ this = 0;
+ /*
+ * '*' means one of two things: match the rest of the input,
+ * or match as many characters as possible
+ */
+ if (fmt[0] == '*') {
+ fmt++;
+ dirflag=1;
+ /*
+ * no more format: eat rest of string...
+ */
+ if (!fmt[0]) {
+ for (;input[input_index]; input_index++)
+ vec_add1(this, input[input_index]);
+ if (vec_len(this)) {
+ vec_add1(this, 0);
+#ifdef MATCH_TRACE
+ printf("final star-match adds: '%s'\n", this);
+#endif
+ vec_add1(rv, this);
+ } else {
+ vec_add1(string_cache, this);
+ }
+
+ return(rv);
+ }
+ }
+ /*
+ * Left-to-right scan, adding chars until next delimiter char
+ * appears.
+ */
+ if (!dirflag) {
+ while (input[input_index]) {
+ if (input[input_index] == fmt[0]) {
+ /* If we just (exact) matched a whitespace delimiter */
+ if (fmt[0] == ' '){
+ /* scan forward eating whitespace */
+ while (input[input_index] == ' ' ||
+ input[input_index] == '\t' ||
+ input[input_index] == '\n')
+ input_index++;
+ input_index--;
+ }
+ goto found;
+ }
+ /* If we're looking for whitespace */
+ if (fmt[0] == ' ') {
+ /* and we have whitespace */
+ if (input[input_index] == ' ' ||
+ input[input_index] == '\t' ||
+ input[input_index] == '\n') {
+ /* scan forward eating whitespace */
+ while (input[input_index] == ' ' ||
+ input[input_index] == '\t' ||
+ input[input_index] == '\n') {
+ input_index++;
+ }
+ input_index--;
+ goto found;
+ }
+ }
+ /* Not a delimiter, save it */
+ vec_add1(this, input[input_index]);
+ input_index++;
+ }
+ /*
+ * Fell off the wagon, clean up and bail out
+ */
+ bail:
+
+#ifdef MATCH_TRACE
+ printf("failed, fmt[0] = '%c', input[%d]='%s'\n",
+ fmt[0], input_index, &input[input_index]);
+#endif
+ delsvec_recycle_this_string(this);
+ for (i = 0; i < vec_len(rv); i++)
+ delsvec_recycle_this_string(rv[i]);
+ delsvec_recycle_this_svec(rv);
+ return(0);
+
+ found:
+ /*
+ * Delimiter matched
+ */
+ input_index++;
+ fmt++;
+ /*
+ * If we actually accumulated non-delimiter characters,
+ * add them to the result vector
+ */
+ if (vec_len(this)) {
+ vec_add1(this, 0);
+#ifdef MATCH_TRACE
+ printf("match: add '%s'\n", this);
+#endif
+ vec_add1(rv, this);
+ } else {
+ vec_add1(string_cache, this);
+ }
+ } else {
+ /*
+ * right-to-left scan, '*' not at
+ * the end of the delimiter string
+ */
+ i = input_index;
+ while (input[++i])
+ ; /* scan forward */
+ i--;
+ while (i > input_index) {
+ if (input[i] == fmt[0])
+ goto found2;
+
+ if (fmt[0] == ' ' || fmt[0] == '\t' ||
+ fmt[0] == '\n') {
+ if (input[i] == ' ' ||
+ input[i] == '\t' ||
+ input[i] == '\n')
+ goto found2;
+ }
+ i--;
+ }
+ goto bail;
+
+ found2:
+ for (; input_index < i; input_index++) {
+ vec_add1(this, input[input_index]);
+ }
+ input_index++;
+ fmt++;
+ vec_add1(this, 0);
+#ifdef MATCH_TRACE
+ printf("inner '*' match: add '%s'\n", this);
+#endif
+ vec_add1(rv, this);
+ }
+ }
+ return (rv);
+}
+
+#ifdef UNIT_TESTS
+
+typedef struct utest_ {
+ char *string;
+ char *fmt;
+} utest_t;
+
+utest_t tests[] = {
+#ifdef NOTDEF
+ {"Dec 7 08:56",
+ " :*"},
+ {"Dec 17 08:56",
+ " :*"},
+ {"Dec 7 08:56:41.239 install/inst_repl 0/9/CPU0 t1 [40989] File List:Successfully blobbified file list. Took 1 milliseconds",
+ " ::. / // [] *"},
+ {"RP/0/9/CPU0:Dec 7 08:55:28.550 : sam_server[291]: SAM backs up digest list to memory file",
+ "///: ::. : []: *"},
+ /* Expected to fail */
+ {"Dec 7 08:56:41.239 install/inst_repl 0/9/CPU0 t1 [40989] File List:Successfully blobbified file list. Took 1 milliseconds",
+ "///: ::. : : *"},
+ /* Expected to fail */
+ {"RP/0/9/CPU0:Dec 7 08:55:28.550 : sam_server[291]: SAM backs up digest list to memory file",
+ " ::. / // [] *"},
+ {"THIS that and + theother", "*+ *"},
+ {"Dec 12 15:33:07.103 ifmgr/errors 0/RP0/CPU0 3# t2 Failed to open IM connection: No such file or directory", " ::. / // *"},
+ {"Dec 16 21:43:47.328 ifmgr/bulk 0/3/CPU0 t8 Bulk DPC async download complete. Partitions 1, node_count 1, total_out 0, out_offset 0, out_expected 0: No error"," ::. / // *"},
+ {"t:0x53034bd6 CPU:00 PROCESS :PROCCREATE_NAME",
+ ": : :*"},
+ {" pid:1", " *"},
+ {"t:0x53034cbb CPU:00 THREAD :THCREATE pid:1 tid:1",
+ ": : : pid: tid:*"},
+ {"t:0x5303f950 CPU:00 COMM :REC_PULSE scoid:0x40000003 pid:364659",
+ ": : : *"},
+ {"/hfr-base-3.3.85/lib/libttyconnection.dll 0xfc000000 0x0000306c 0xfc027000 0x000001c8 1",
+ " *"},
+ {"Feb 28 02:38:26.123 seqtrace 0/1/CPU0 t8 :msg_receive:ifmgr/t8:IMC_MSG_MTU_UPDATE:ppp_ma/t1",
+ " ::. // ::::*"},
+
+ {"Feb 28 02:38:26.123 seqtrace 0/1/CPU0 t8 :msg_send_event:call:ifmgr/t8:124/0:cdp/t1",
+ " ::. // :msg_send_event::::*"},
+
+ {"Feb 28 02:38:26.125 seqtrace 0/1/CPU0 t1 :msg_receive_event:cdp/t1:124/0",
+ " ::. // :msg_receive_event::*"}
+ {"t:0x645dd86d CPU:00 USREVENT:EVENT:100, d0:0x00000002 d1:0x00000000",
+ ": : USREVENT:EVENT:, d0: *"}
+ {"t:0x5303f950 CPU:00 COMM :REC_PULSE scoid:0x40000003 pid:364659",
+ ": : : *"},
+ {"t:0x2ccf9f5a CPU:00 INT_ENTR:0x80000000 (-2147483648) IP:0x002d8b18",
+ ": : INT_ENTR: IP:*"}
+ {"t:0xd473951c CPU:00 KER_EXIT:SCHED_GET/88 ret_val:2 sched_priority:10",
+ ": : KER_EXIT:SCHED_GET : sched_priority:*"}
+ {"t:0x00000123 CPU:01 SYSTEM :FUNC_ENTER thisfn:0x40e62048 call_site:0x00000000",
+ ": : SYSTEM :FUNC_ thisfn: *"},
+ {"t:0x5af8de95 CPU:00 INT_HANDLER_ENTR:0x0000004d (77) PID:8200 IP:0x00000000 AREA:0x0bf9b290", ": : INT_HANDLER_*"},
+#endif
+ {"t:0x6d1ff92f CPU:00 CONTROL: BUFFER sequence = 1053, num_events = 714",
+ ": : CONTROL*"},
+ {"t:0x6d1ff92f CPU:00 CONTROL :TIME msb:0x0000003c lsb(offset):0x6d1ff921",
+ ": : CONTROL*"},
+};
+
+int main (int argc, char **argv)
+{
+ int i, j;
+ u8 **svec;
+
+ for (j = 0; j < ARRAY_LEN(tests); j++) {
+ printf ("input string: '%s'\n", tests[j].string);
+ printf ("delimiter arg: '%s'\n", tests[j].fmt);
+ printf ("parse trace:\n");
+ svec = delsvec(tests[j].string, tests[j].fmt);
+ if (!svec) {
+ printf("index %d failed\n", j);
+ continue;
+ }
+ printf("%d substring vectors\n", vec_len(svec));
+ for (i = 0; i < vec_len(svec); i++) {
+ printf("[%d]: '%s'\n", i, svec[i]);
+ }
+ printf ("-------------------\n");
+ }
+ exit(0);
+}
+#endif