[pulseaudio-discuss] [PATCH 2/3] conf-parser: Add support for parsing property lists.

Maarten Bosmans mkbosmans at gmail.com
Sat Dec 3 04:04:44 PST 2011


Would the patch in this form also allow the parse_properties in
module-augment-properties to be replaced by this generic function from
conf-parser.h? That would be a nice extra.

Maarten

2011/12/3 Tanu Kaskinen <tanuk at iki.fi>:
> ---
>  src/daemon/daemon-conf.c                |    2 +-
>  src/modules/alsa/alsa-mixer.c           |    4 +-
>  src/modules/module-augment-properties.c |    2 +-
>  src/pulse/client-conf.c                 |    2 +-
>  src/pulsecore/conf-parser.c             |   46 ++++++++++++++++++++++++++++---
>  src/pulsecore/conf-parser.h             |   17 ++++++++++-
>  6 files changed, 62 insertions(+), 11 deletions(-)
>
> diff --git a/src/daemon/daemon-conf.c b/src/daemon/daemon-conf.c
> index 3ef7f81..4532e9e 100644
> --- a/src/daemon/daemon-conf.c
> +++ b/src/daemon/daemon-conf.c
> @@ -645,7 +645,7 @@ int pa_daemon_conf_load(pa_daemon_conf *c, const char *filename) {
>     ci.default_channel_map_set = ci.default_sample_spec_set = FALSE;
>     ci.conf = c;
>
> -    r = f ? pa_config_parse(c->config_file, f, table, NULL) : 0;
> +    r = f ? pa_config_parse(c->config_file, f, table, NULL, NULL) : 0;
>
>     if (r >= 0) {
>
> diff --git a/src/modules/alsa/alsa-mixer.c b/src/modules/alsa/alsa-mixer.c
> index 36f3351..c646f31 100644
> --- a/src/modules/alsa/alsa-mixer.c
> +++ b/src/modules/alsa/alsa-mixer.c
> @@ -2390,7 +2390,7 @@ pa_alsa_path* pa_alsa_path_new(const char *paths_dir, const char *fname, pa_alsa
>
>     fn = pa_maybe_prefix_path(fname, paths_dir);
>
> -    r = pa_config_parse(fn, NULL, items, p);
> +    r = pa_config_parse(fn, NULL, items, NULL, p);
>     pa_xfree(fn);
>
>     if (r < 0)
> @@ -4123,7 +4123,7 @@ pa_alsa_profile_set* pa_alsa_profile_set_new(const char *fname, const pa_channel
>                               pa_run_from_build_tree() ? PA_BUILDDIR "/modules/alsa/mixer/profile-sets/" :
>                               PA_ALSA_PROFILE_SETS_DIR);
>
> -    r = pa_config_parse(fn, NULL, items, ps);
> +    r = pa_config_parse(fn, NULL, items, NULL, ps);
>     pa_xfree(fn);
>
>     if (r < 0)
> diff --git a/src/modules/module-augment-properties.c b/src/modules/module-augment-properties.c
> index 05f6f0a..d45bcdc 100644
> --- a/src/modules/module-augment-properties.c
> +++ b/src/modules/module-augment-properties.c
> @@ -228,7 +228,7 @@ static void update_rule(struct rule *r) {
>     table[0].data = &r->application_name;
>     table[1].data = &r->icon_name;
>
> -    if (pa_config_parse(fn, NULL, table, r) < 0)
> +    if (pa_config_parse(fn, NULL, table, NULL, r) < 0)
>         pa_log_warn("Failed to parse .desktop file %s.", fn);
>
>     pa_xfree(fn);
> diff --git a/src/pulse/client-conf.c b/src/pulse/client-conf.c
> index e2c2aae..3641e3e 100644
> --- a/src/pulse/client-conf.c
> +++ b/src/pulse/client-conf.c
> @@ -127,7 +127,7 @@ int pa_client_conf_load(pa_client_conf *c, const char *filename) {
>                 goto finish;
>     }
>
> -    r = f ? pa_config_parse(fn, f, table, NULL) : 0;
> +    r = f ? pa_config_parse(fn, f, table, NULL, NULL) : 0;
>
>     if (!r)
>         r = pa_client_conf_load_cookie(c);
> diff --git a/src/pulsecore/conf-parser.c b/src/pulsecore/conf-parser.c
> index 41849c2..6602766 100644
> --- a/src/pulsecore/conf-parser.c
> +++ b/src/pulsecore/conf-parser.c
> @@ -44,15 +44,17 @@ struct parser_state {
>     unsigned lineno;
>     char *section;
>     const pa_config_item *item_table;
> +    pa_proplist *proplist;
>     char buf[4096];
>     void *userdata;
>
>     char *lvalue;
>     char *rvalue;
> +    pa_bool_t in_proplist;
>  };
>
>  /* Run the user supplied parser for an assignment */
> -static int next_assignment(struct parser_state *state) {
> +static int normal_assignment(struct parser_state *state) {
>     const pa_config_item *item;
>
>     pa_assert(state);
> @@ -76,6 +78,19 @@ static int next_assignment(struct parser_state *state) {
>     return -1;
>  }
>
> +/* Parse a proplist entry. */
> +static int proplist_assignment(struct parser_state *state) {
> +    pa_assert(state);
> +    pa_assert(state->proplist);
> +
> +    if (pa_proplist_sets(state->proplist, state->lvalue, state->rvalue) < 0) {
> +        pa_log("[%s:%u] Failed to parse a proplist entry: %s = %s", state->filename, state->lineno, state->lvalue, state->rvalue);
> +        return -1;
> +    }
> +
> +    return 0;
> +}
> +
>  /* Parse a variable assignment line */
>  static int parse_line(struct parser_state *state) {
>     char *c;
> @@ -102,7 +117,7 @@ static int parse_line(struct parser_state *state) {
>             }
>         }
>
> -        r = pa_config_parse(fn, NULL, state->item_table, state->userdata);
> +        r = pa_config_parse(fn, NULL, state->item_table, state->proplist, state->userdata);
>         pa_xfree(path);
>         return r;
>     }
> @@ -120,6 +135,17 @@ static int parse_line(struct parser_state *state) {
>
>         pa_xfree(state->section);
>         state->section = pa_xstrndup(state->lvalue + 1, k-2);
> +
> +        if (pa_streq(state->section, "Property List")) {
> +            if (!state->proplist) {
> +                pa_log("[%s:%u] \"Property List\" section is not allowed in this file.", state->filename, state->lineno);
> +                return -1;
> +            }
> +
> +            state->in_proplist = TRUE;
> +        } else
> +            state->in_proplist = FALSE;
> +
>         return 0;
>     }
>
> @@ -134,11 +160,14 @@ static int parse_line(struct parser_state *state) {
>     state->lvalue = pa_strip(state->lvalue);
>     state->rvalue = pa_strip(state->rvalue);
>
> -    return next_assignment(state);
> +    if (state->in_proplist)
> +        return proplist_assignment(state);
> +    else
> +        return normal_assignment(state);
>  }
>
>  /* Go through the file and parse each line */
> -int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, void *userdata) {
> +int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, pa_proplist *proplist, void *userdata) {
>     int r = -1;
>     pa_bool_t do_close = !f;
>     struct parser_state state;
> @@ -162,6 +191,9 @@ int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, void
>     state.item_table = t;
>     state.userdata = userdata;
>
> +    if (proplist)
> +        state.proplist = pa_proplist_new();
> +
>     while (!feof(f)) {
>         if (!fgets(state.buf, sizeof(state.buf), f)) {
>             if (feof(f))
> @@ -177,9 +209,15 @@ int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, void
>             goto finish;
>     }
>
> +    if (proplist)
> +        pa_proplist_update(proplist, PA_UPDATE_REPLACE, state.proplist);
> +
>     r = 0;
>
>  finish:
> +    if (state.proplist)
> +        pa_proplist_free(state.proplist);
> +
>     pa_xfree(state.section);
>
>     if (do_close && f)
> diff --git a/src/pulsecore/conf-parser.h b/src/pulsecore/conf-parser.h
> index c6c8a14..9fb0110 100644
> --- a/src/pulsecore/conf-parser.h
> +++ b/src/pulsecore/conf-parser.h
> @@ -24,6 +24,8 @@
>
>  #include <stdio.h>
>
> +#include <pulse/proplist.h>
> +
>  /* An abstract parser for simple, line based, shallow configuration
>  * files consisting of variable assignments only. */
>
> @@ -39,8 +41,19 @@ typedef struct pa_config_item {
>
>  /* The configuration file parsing routine. Expects a table of
>  * pa_config_items in *t that is terminated by an item where lvalue is
> - * NULL */
> -int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, void *userdata);
> + * NULL.
> + *
> + * Some configuration files may contain a Property List section, which
> + * is a bit special. Normally all accepted lvalues must be predefined
> + * in the pa_config_item table, but in the Property List section the
> + * pa_config_item table is ignored, and all lvalues are accepted (as
> + * long as they are valid proplist keys). If the proplist pointer is
> + * non-NULL, the parser will parse any section named "Property List" as
> + * properties, and those properties will be merged into the given
> + * proplist. If proplist is NULL, then sections named "Property List"
> + * are not allowed at all in the configuration file.
> + */
> +int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, pa_proplist *proplist, void *userdata);
>
>  /* Generic parsers for integers, size_t, booleans and strings */
>  int pa_config_parse_int(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata);
> --
> 1.7.7.3
>
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