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Code

config, Bug 503: Keep track of what has been mirrored.

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(cherry picked from commit 1f0c361ead,
 fixing the obvious typo)
This commit is contained in:
Kalle Olavi Niemitalo 2008-02-03 01:52:33 +02:00 committed by Kalle Olavi Niemitalo
parent 9dcece750f
commit b7ff11f8d2
1 changed files with 46 additions and 33 deletions
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79
src/config/conf.c
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@ -69,6 +69,13 @@ struct conf_parsing_state {
* shown in error messages. */
int line;
} pos;
/** When ELinks is rewriting the configuration file, @c mirrored
* indicates the end of the part that has already been copied
* to the mirror string. Otherwise, @c mirrored is not used.
*
* @invariant @c mirrored @<= @c pos.look */
unsigned char *mirrored;
};
/** Skip comments and whitespace. */
@ -106,7 +113,6 @@ static enum parse_error
parse_set(struct option *opt_tree, struct conf_parsing_state *state,
struct string *mirror, int is_system_conf)
{
unsigned char *orig_pos = state->pos.look;
unsigned char *optname;
skip_white(&state->pos);
@ -130,7 +136,11 @@ parse_set(struct option *opt_tree, struct conf_parsing_state *state,
if (!*state->pos.look) { mem_free(optname); return ERROR_VALUE; }
/* Mirror what we already have */
if (mirror) add_bytes_to_string(mirror, orig_pos, state->pos.look - orig_pos);
if (mirror) {
add_bytes_to_string(mirror, state->mirrored,
state->pos.look - state->mirrored);
state->mirrored = state->pos.look;
}
/* Option value */
{
@ -157,6 +167,7 @@ parse_set(struct option *opt_tree, struct conf_parsing_state *state,
opt->flags |= OPT_WATERMARK;
if (option_types[opt->type].write) {
option_types[opt->type].write(opt, mirror);
state->mirrored = state->pos.look;
}
} else if (!option_types[opt->type].set
|| !option_types[opt->type].set(opt, val)) {
@ -176,7 +187,6 @@ static enum parse_error
parse_unset(struct option *opt_tree, struct conf_parsing_state *state,
struct string *mirror, int is_system_conf)
{
unsigned char *orig_pos = state->pos.look;
unsigned char *optname;
/* XXX: This does not handle the autorewriting well and is mostly a
@ -195,7 +205,11 @@ parse_unset(struct option *opt_tree, struct conf_parsing_state *state,
if (!optname) return ERROR_NOMEM;
/* Mirror what we have */
if (mirror) add_bytes_to_string(mirror, orig_pos, state->pos.look - orig_pos);
if (mirror) {
add_bytes_to_string(mirror, state->mirrored,
state->pos.look - state->mirrored);
state->mirrored = state->pos.look;
}
{
struct option *opt;
@ -223,7 +237,7 @@ static enum parse_error
parse_bind(struct option *opt_tree, struct conf_parsing_state *state,
struct string *mirror, int is_system_conf)
{
unsigned char *orig_pos = state->pos.look, *next_pos;
unsigned char *next_pos;
unsigned char *keymap, *keystroke, *action;
enum parse_error err = ERROR_NONE;
@ -274,10 +288,11 @@ parse_bind(struct option *opt_tree, struct conf_parsing_state *state,
unsigned char *act_str = bind_act(keymap, keystroke);
if (act_str) {
add_bytes_to_string(mirror, orig_pos,
next_pos - orig_pos);
add_bytes_to_string(mirror, state->mirrored,
next_pos - state->mirrored);
add_to_string(mirror, act_str);
mem_free(act_str);
state->mirrored = state->pos.look;
} else {
err = ERROR_VALUE;
}
@ -302,7 +317,6 @@ static enum parse_error
parse_include(struct option *opt_tree, struct conf_parsing_state *state,
struct string *mirror, int is_system_conf)
{
unsigned char *orig_pos = state->pos.look;
unsigned char *fname;
struct string dumbstring;
@ -322,10 +336,6 @@ parse_include(struct option *opt_tree, struct conf_parsing_state *state,
return ERROR_VALUE;
}
/* Mirror what we already have */
if (mirror) add_bytes_to_string(mirror, orig_pos,
state->pos.look - orig_pos);
/* We want load_config_file() to watermark stuff, but not to load
* anything, polluting our beloved options tree - thus, we will feed it
* with some dummy string which we will destroy later; still better
@ -369,6 +379,11 @@ parse_config_command(struct option *options, struct conf_parsing_state *state,
{
const struct parse_handler *handler;
/* If we're mirroring, then everything up to this point must
* have already been mirrored. */
assert(mirror == NULL || state->mirrored == state->pos.look);
if_assert_failed return ERROR_PARSE;
for (handler = parse_handlers; handler->command;
handler++) {
int cmdlen = strlen(handler->command);
@ -376,23 +391,17 @@ parse_config_command(struct option *options, struct conf_parsing_state *state,
if (!strncmp(state->pos.look, handler->command, cmdlen)
&& isspace(state->pos.look[cmdlen])) {
enum parse_error err;
struct string mirror2 = NULL_STRING;
struct string *m2 = NULL;
/* Mirror what we already have */
if (mirror && init_string(&mirror2)) {
m2 = &mirror2;
add_bytes_to_string(m2, state->pos.look, cmdlen);
}
state->pos.look += cmdlen;
err = handler->handler(options, state, m2,
err = handler->handler(options, state, mirror,
is_system_conf);
if (!err && mirror && m2) {
add_string_to_string(mirror, m2);
if (mirror) {
/* Mirror any characters that the handler
* consumed but did not already mirror. */
add_bytes_to_string(mirror, state->mirrored,
state->pos.look - state->mirrored);
state->mirrored = state->pos.look;
}
if (m2) done_string(m2);
return err;
}
}
@ -408,6 +417,7 @@ parse_config_exmode_command(unsigned char *cmd)
state.pos.look = cmd;
state.pos.line = 0;
state.mirrored = NULL; /* not read because mirror is NULL too */
return parse_config_command(config_options, &state, NULL, 0);
}
@ -433,17 +443,18 @@ parse_config_file(struct option *options, unsigned char *name,
state.pos.look = file;
state.pos.line = 1;
state.mirrored = file;
while (state.pos.look && *state.pos.look) {
unsigned char *orig_pos = state.pos.look;
/* Skip all possible comments and whitespace. */
skip_white(&state.pos);
/* Mirror what we already have */
if (mirror)
add_bytes_to_string(mirror, orig_pos,
state.pos.look - orig_pos);
if (mirror) {
add_bytes_to_string(mirror, state.mirrored,
state.pos.look - state.mirrored);
state.mirrored = state.pos.look;
}
/* Second chance to escape from the hell. */
if (!*state.pos.look) break;
@ -452,15 +463,17 @@ parse_config_file(struct option *options, unsigned char *name,
is_system_conf);
if (err == ERROR_COMMAND) {
orig_pos = state.pos.look;
/* Jump over this crap we can't understand. */
while (!isspace(*state.pos.look)
&& *state.pos.look != '#' && *state.pos.look)
state.pos.look++;
/* Mirror what we already have */
if (mirror) add_bytes_to_string(mirror, orig_pos,
state.pos.look - orig_pos);
if (mirror) {
add_bytes_to_string(mirror, state.mirrored,
state.pos.look - state.mirrored);
state.mirrored = state.pos.look;
}
}
if (!mirror && err) {