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Extend string syntax in config

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And actually test the results of string parsing.
This commit is contained in:
Přemysl Eric Janouch
2022-08-14 18:03:18 +02:00
parent 7e8e085c97
commit f545be725d
3 changed files with 52 additions and 9 deletions
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2
LICENSE
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@@ -1,4 +1,4 @@
Copyright (c) 2014 - 2020, Přemysl Eric Janouch <p@janouch.name>
Copyright (c) 2014 - 2022, Přemysl Eric Janouch <p@janouch.name>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

52
liberty.c
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@@ -1,7 +1,7 @@
/*
* liberty.c: the ultimate C unlibrary
*
* Copyright (c) 2014 - 2020, Přemysl Eric Janouch <p@janouch.name>
* Copyright (c) 2014 - 2022, Přemysl Eric Janouch <p@janouch.name>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted.
@@ -4412,7 +4412,9 @@ socket_io_try_write (int socket_fd, struct str *wb)
// object = lws '{' entries endobj
// endobj = lws '}'
//
// string = lws '"' ('\\' escape / ![\\"] char)* '"'
// quoted = lws '"' ('\\' escape / ![\\"] char)* '"'
// / lws '`' ![`]* '`'
// string = (quoted)+
// char = [\0-\177] # or any Unicode codepoint in the UTF-8 encoding
// escape = [\\"abfnrtv] / [xX][0-9A-Fa-f][0-9A-Fa-f]? / [0-7][0-7]?[0-7]?
//
@@ -5039,10 +5041,10 @@ config_tokenizer_escape_sequence
}
static bool
config_tokenizer_string
(struct config_tokenizer *self, struct str *output, struct error **e)
config_tokenizer_dq_string (struct config_tokenizer *self, struct str *output,
struct error **e)
{
unsigned char c;
unsigned char c = config_tokenizer_advance (self);
while (self->len)
{
if ((c = config_tokenizer_advance (self)) == '"')
@@ -5056,6 +5058,44 @@ config_tokenizer_string
return false;
}
static bool
config_tokenizer_bt_string (struct config_tokenizer *self, struct str *output,
struct error **e)
{
unsigned char c = config_tokenizer_advance (self);
while (self->len)
{
if ((c = config_tokenizer_advance (self)) == '`')
return true;
str_append_c (output, c);
}
config_tokenizer_error (self, e, "premature end of string");
return false;
}
static bool
config_tokenizer_string (struct config_tokenizer *self, struct str *output,
struct error **e)
{
// Go-like strings, with C/AWK-like automatic concatenation
while (self->len)
{
bool ok = true;
if (isspace_ascii (*self->p) && *self->p != '\n')
config_tokenizer_advance (self);
else if (*self->p == '"')
ok = config_tokenizer_dq_string (self, output, e);
else if (*self->p == '`')
ok = config_tokenizer_bt_string (self, output, e);
else
break;
if (!ok)
return false;
}
return true;
}
static enum config_token
config_tokenizer_next (struct config_tokenizer *self, struct error **e)
{
@@ -5080,7 +5120,7 @@ config_tokenizer_next (struct config_tokenizer *self, struct error **e)
return CONFIG_T_ABORT;
case '"':
config_tokenizer_advance (self);
case '`':
str_reset (&self->string);
if (!config_tokenizer_string (self, &self->string, e))
return CONFIG_T_ABORT;

7
tests/liberty.c
View File

@@ -1,7 +1,7 @@
/*
* tests/liberty.c
*
* Copyright (c) 2015 - 2016, Přemysl Eric Janouch <p@janouch.name>
* Copyright (c) 2015 - 2022, Přemysl Eric Janouch <p@janouch.name>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted.
@@ -649,7 +649,7 @@ static struct config_schema g_config_test[] =
.default_ = "1" },
{ .name = "foobar",
.type = CONFIG_ITEM_STRING,
.default_ = "\"qux\\x01\"" },
.default_ = "\"qux\\x01`\" \"\"`a`" },
{}
};
@@ -675,6 +675,9 @@ test_config (void)
"top.bar", NULL), invalid, NULL));
config_item_destroy (invalid);
hard_assert (!strcmp ("qux\001`a",
config_item_get (config.root, "top.foobar", NULL)->value.string.str));
struct str s = str_make ();
config_item_write (config.root, true, &s);
struct config_item *parsed = config_item_parse (s.str, s.len, false, NULL);