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/*++
/* NAME
/* split_qnameval 3
/* SUMMARY
/* name-value splitter
/* SYNOPSIS
/* #include <stringops.h>
/*
/* const char *split_qnameval(buf, name, value)
/* char *buf;
/* char **name;
/* char **value;
/* DESCRIPTION
/* split_qnameval() expects text of the form "key = value"
/* or "key =", where the key may be quoted with backslash or
/* double quotes. The buffer argument is broken up into the key
/* and value substrings.
/*
/* Arguments:
/* .IP buf
/* Result from readlline() or equivalent. The buffer is modified.
/* .IP key
/* Upon successful completion, this is set to the key
/* substring.
/* .IP value
/* Upon successful completion, this is set to the value
/* substring.
/* SEE ALSO
/* split_nameval(3) name-value splitter
/* BUGS
/* DIAGNOSTICS
/* The result is a null pointer in case of success, a string
/* describing the error otherwise: missing '=' after attribute
/* name; missing attribute name.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System libraries. */
#include <sys_defs.h>
#include <ctype.h>
#include <string.h>
/* Utility library. */
#include <msg.h>
#include <stringops.h>
/* split_qnameval - split "key = value", support quoted key */
const char *split_qnameval(char *buf, char **pkey, char **pvalue)
{
int in_quotes = 0;
char *key;
char *key_end;
char *value;
for (key = buf; *key && ISSPACE(*key); key++)
/* void */ ;
if (*key == 0)
return ("no key found; expected format: key = value");
for (key_end = key; *key_end; key_end++) {
if (*key_end == '\\') {
if (*++key_end == 0)
break;
} else if (ISSPACE(*key_end) || *key_end == '=') {
if (!in_quotes)
break;
} else if (*key_end == '"') {
in_quotes = !in_quotes;
}
}
if (in_quotes) {
return ("unbalanced '\"\'");
}
value = key_end;
while (ISSPACE(*value))
value++;
if (*value != '=')
return ("missing '=' after attribute name");
*key_end = 0;
do {
value++;
} while (ISSPACE(*value));
trimblanks(value, 0)[0] = 0;
*pkey = key;
*pvalue = value;
return (0);
}
#ifdef TEST
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <mymalloc.h>
static int compare(int test_number, const char *what,
const char *expect, const char *real)
{
if ((expect == 0 && real == 0)
|| (expect != 0 && real != 0 && strcmp(expect, real) == 0)) {
return (0);
} else {
msg_warn("test %d: %s mis-match: expect='%s', real='%s'",
test_number, what, expect ? expect : "(null)",
real ? real : "(null)");
return (1);
}
}
int main(int argc, char **argv)
{
struct test_info {
const char *input;
const char *expect_result;
const char *expect_key;
const char *expect_value;
};
static const struct test_info test_info[] = {
/* Unquoted keys. */
{"xx = yy", 0, "xx", "yy"},
{"xx=yy", 0, "xx", "yy"},
{"xx =", 0, "xx", ""},
{"xx=", 0, "xx", ""},
{"xx", "missing '=' after attribute name", 0, 0},
/* Quoted keys. */
{"\"xx \" = yy", 0, "\"xx \"", "yy"},
{"\"xx \"= yy", 0, "\"xx \"", "yy"},
{"\"xx \" =", 0, "\"xx \"", ""},
{"\"xx \"=", 0, "\"xx \"", ""},
{"\"xx \"", "missing '=' after attribute name", 0, 0},
{"\"xx ", "unbalanced '\"'", 0, 0},
/* Backslash escapes. */
{"\"\\\"xx \" = yy", 0, "\"\\\"xx \"", "yy"},
{0,},
};
int errs = 0;
const struct test_info *tp;
for (tp = test_info; tp->input != 0; tp++) {
const char *result;
char *key = 0;
char *value = 0;
char *buf = mystrdup(tp->input);
int test_number = (int) (tp - test_info);
result = split_qnameval(buf, &key, &value);
errs += compare(test_number, "result", tp->expect_result, result);
errs += compare(test_number, "key", tp->expect_key, key);
errs += compare(test_number, "value", tp->expect_value, value);
myfree(buf);
}
exit(errs);
}
#endif
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