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-rw-r--r--src/util/mystrtok.c347
1 files changed, 347 insertions, 0 deletions
diff --git a/src/util/mystrtok.c b/src/util/mystrtok.c
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+/*++
+/* NAME
+/* mystrtok 3
+/* SUMMARY
+/* safe tokenizer
+/* SYNOPSIS
+/* #include <stringops.h>
+/*
+/* char *mystrtok(bufp, delimiters)
+/* char **bufp;
+/* const char *delimiters;
+/*
+/* char *mystrtokq(bufp, delimiters, parens)
+/* char **bufp;
+/* const char *delimiters;
+/* const char *parens;
+/*
+/* char *mystrtokdq(bufp, delimiters)
+/* char **bufp;
+/* const char *delimiters;
+/*
+/* char *mystrtok_cw(bufp, delimiters, blame)
+/* char **bufp;
+/* const char *delimiters;
+/* const char *blame;
+/*
+/* char *mystrtokq_cw(bufp, delimiters, parens, blame)
+/* char **bufp;
+/* const char *delimiters;
+/* const char *parens;
+/* const char *blame;
+/*
+/* char *mystrtokdq_cw(bufp, delimiters, blame)
+/* char **bufp;
+/* const char *delimiters;
+/* const char *blame;
+/* DESCRIPTION
+/* mystrtok() splits a buffer on the specified \fIdelimiters\fR.
+/* Tokens are delimited by runs of delimiters, so this routine
+/* cannot return zero-length tokens.
+/*
+/* mystrtokq() is like mystrtok() but will not split text
+/* between balanced parentheses. \fIparens\fR specifies the
+/* opening and closing parenthesis (one of each). The set of
+/* \fIparens\fR must be distinct from the set of \fIdelimiters\fR.
+/*
+/* mystrtokdq() is like mystrtok() but will not split text
+/* between double quotes. The backslash character may be used
+/* to escape characters. The double quote and backslash
+/* character must not appear in the set of \fIdelimiters\fR.
+/*
+/* The \fIbufp\fR argument specifies the start of the search; it
+/* is updated with each call. The input is destroyed.
+/*
+/* The result value is the next token, or a null pointer when the
+/* end of the buffer was reached.
+/*
+/* mystrtok_cw(), mystrtokq_cw(), and mystrtokdq_cw, log a
+/* warning and return null when the result would look like
+/* comment. The \fBblame\fR argument provides context for
+/* warning messages. Specify a null pointer to disable the
+/* comment check.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <stringops.h>
+
+/* mystrtok_warn - warn for #comment after other text */
+
+static void mystrtok_warn(const char *start, const char *bufp, const char *blame)
+{
+ msg_warn("%s: #comment after other text is not allowed: %s %.20s...",
+ blame, start, bufp);
+}
+
+/* mystrtok - ABI compatibility wrapper */
+
+#undef mystrtok
+
+char *mystrtok(char **src, const char *sep)
+{
+ return (mystrtok_cw(src, sep, (char *) 0));
+}
+
+/* mystrtok - safe tokenizer */
+
+char *mystrtok_cw(char **src, const char *sep, const char *blame)
+{
+ char *start = *src;
+ char *end;
+
+ /*
+ * Skip over leading delimiters.
+ */
+ start += strspn(start, sep);
+ if (*start == 0) {
+ *src = start;
+ return (0);
+ }
+
+ /*
+ * Separate off one token.
+ */
+ end = start + strcspn(start, sep);
+ if (*end != 0)
+ *end++ = 0;
+ *src = end;
+
+ if (blame && *start == '#') {
+ mystrtok_warn(start, *src, blame);
+ return (0);
+ } else {
+ return (start);
+ }
+}
+
+/* mystrtokq - ABI compatibility wrapper */
+
+#undef mystrtokq
+
+char *mystrtokq(char **src, const char *sep, const char *parens)
+{
+ return (mystrtokq_cw(src, sep, parens, (char *) 0));
+}
+
+/* mystrtokq_cw - safe tokenizer with quoting support */
+
+char *mystrtokq_cw(char **src, const char *sep, const char *parens,
+ const char *blame)
+{
+ char *start = *src;
+ static char *cp;
+ int ch;
+ int level;
+
+ /*
+ * Skip over leading delimiters.
+ */
+ start += strspn(start, sep);
+ if (*start == 0) {
+ *src = start;
+ return (0);
+ }
+
+ /*
+ * Parse out the next token.
+ */
+ for (level = 0, cp = start; (ch = *(unsigned char *) cp) != 0; cp++) {
+ if (ch == parens[0]) {
+ level++;
+ } else if (level > 0 && ch == parens[1]) {
+ level--;
+ } else if (level == 0 && strchr(sep, ch) != 0) {
+ *cp++ = 0;
+ break;
+ }
+ }
+ *src = cp;
+
+ if (blame && *start == '#') {
+ mystrtok_warn(start, *src, blame);
+ return (0);
+ } else {
+ return (start);
+ }
+}
+
+/* mystrtokdq - ABI compatibility wrapper */
+
+#undef mystrtokdq
+
+char *mystrtokdq(char **src, const char *sep)
+{
+ return (mystrtokdq_cw(src, sep, (char *) 0));
+}
+
+/* mystrtokdq_cw - safe tokenizer, double quote and backslash support */
+
+char *mystrtokdq_cw(char **src, const char *sep, const char *blame)
+{
+ char *cp = *src;
+ char *start;
+
+ /*
+ * Skip leading delimiters.
+ */
+ cp += strspn(cp, sep);
+
+ /*
+ * Skip to next unquoted space or comma.
+ */
+ if (*cp == 0) {
+ start = 0;
+ } else {
+ int in_quotes;
+
+ for (in_quotes = 0, start = cp; *cp; cp++) {
+ if (*cp == '\\') {
+ if (*++cp == 0)
+ break;
+ } else if (*cp == '"') {
+ in_quotes = !in_quotes;
+ } else if (!in_quotes && strchr(sep, *(unsigned char *) cp) != 0) {
+ *cp++ = 0;
+ break;
+ }
+ }
+ }
+ *src = cp;
+
+ if (blame && start && *start == '#') {
+ mystrtok_warn(start, *src, blame);
+ return (0);
+ } else {
+ return (start);
+ }
+}
+
+#ifdef TEST
+
+ /*
+ * Test program.
+ */
+#include "msg.h"
+#include "mymalloc.h"
+
+ /*
+ * The following needs to be large enough to include a null terminator in
+ * every testcase.expected field.
+ */
+#define EXPECT_SIZE 5
+
+struct testcase {
+ const char *action;
+ const char *input;
+ const char *expected[EXPECT_SIZE];
+};
+static const struct testcase testcases[] = {
+ {"mystrtok", ""},
+ {"mystrtok", " foo ", {"foo"}},
+ {"mystrtok", " foo bar ", {"foo", "bar"}},
+ {"mystrtokq", ""},
+ {"mystrtokq", "foo bar", {"foo", "bar"}},
+ {"mystrtokq", "{ bar } ", {"{ bar }"}},
+ {"mystrtokq", "foo { bar } baz", {"foo", "{ bar }", "baz"}},
+ {"mystrtokq", "foo{ bar } baz", {"foo{ bar }", "baz"}},
+ {"mystrtokq", "foo { bar }baz", {"foo", "{ bar }baz"}},
+ {"mystrtokdq", ""},
+ {"mystrtokdq", " foo ", {"foo"}},
+ {"mystrtokdq", " foo bar ", {"foo", "bar"}},
+ {"mystrtokdq", " foo\\ bar ", {"foo\\ bar"}},
+ {"mystrtokdq", " foo \\\" bar", {"foo", "\\\"", "bar"}},
+ {"mystrtokdq", " foo \" bar baz\" ", {"foo", "\" bar baz\""}},
+ {"mystrtok_cw", "#after text"},
+ {"mystrtok_cw", "before-text #after text", {"before-text"}},
+ {"mystrtokq_cw", "#after text"},
+ {"mystrtokq_cw", "{ before text } #after text", "{ before text }"},
+ {"mystrtokdq_cw", "#after text"},
+ {"mystrtokdq_cw", "\"before text\" #after text", {"\"before text\""}},
+};
+
+int main(void)
+{
+ const struct testcase *tp;
+ char *actual;
+ int pass;
+ int fail;
+ int match;
+ int n;
+
+#define NUM_TESTS sizeof(testcases)/sizeof(testcases[0])
+#define STR_OR_NULL(s) ((s) ? (s) : "null")
+
+ for (pass = fail = 0, tp = testcases; tp < testcases + NUM_TESTS; tp++) {
+ char *saved_input = mystrdup(tp->input);
+ char *cp = saved_input;
+
+ msg_info("RUN test case %ld %s >%s<",
+ (long) (tp - testcases), tp->action, tp->input);
+#if 0
+ msg_info("action=%s", tp->action);
+ msg_info("input=%s", tp->input);
+ for (n = 0; tp->expected[n]; tp++)
+ msg_info("expected[%d]=%s", n, tp->expected[n]);
+#endif
+
+ for (n = 0; n < EXPECT_SIZE; n++) {
+ if (strcmp(tp->action, "mystrtok") == 0) {
+ actual = mystrtok(&cp, CHARS_SPACE);
+ } else if (strcmp(tp->action, "mystrtokq") == 0) {
+ actual = mystrtokq(&cp, CHARS_SPACE, CHARS_BRACE);
+ } else if (strcmp(tp->action, "mystrtokdq") == 0) {
+ actual = mystrtokdq(&cp, CHARS_SPACE);
+ } else if (strcmp(tp->action, "mystrtok_cw") == 0) {
+ actual = mystrtok_cw(&cp, CHARS_SPACE, "test");
+ } else if (strcmp(tp->action, "mystrtokq_cw") == 0) {
+ actual = mystrtokq_cw(&cp, CHARS_SPACE, CHARS_BRACE, "test");
+ } else if (strcmp(tp->action, "mystrtokdq_cw") == 0) {
+ actual = mystrtokdq_cw(&cp, CHARS_SPACE, "test");
+ } else {
+ msg_panic("invalid command: %s", tp->action);
+ }
+ if ((match = (actual && tp->expected[n]) ?
+ (strcmp(actual, tp->expected[n]) == 0) :
+ (actual == tp->expected[n])) != 0) {
+ if (actual == 0) {
+ msg_info("PASS test %ld", (long) (tp - testcases));
+ pass++;
+ break;
+ }
+ } else {
+ msg_warn("expected: >%s<, got: >%s<",
+ STR_OR_NULL(tp->expected[n]), STR_OR_NULL(actual));
+ msg_info("FAIL test %ld", (long) (tp - testcases));
+ fail++;
+ break;
+ }
+ }
+ if (n >= EXPECT_SIZE)
+ msg_panic("need to increase EXPECT_SIZE");
+ myfree(saved_input);
+ }
+ return (fail > 0);
+}
+
+#endif
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