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edid: add di_edid_dup()

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Signed-off-by: Simon Ser <contact@emersion.fr>
This commit is contained in:
Simon Ser 2023-04-14 12:38:37 +02:00
parent 301ea46f29
commit 71facca5d3
2 changed files with 121 additions and 0 deletions
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112
edid.c
View file

@ -1588,3 +1588,115 @@ di_edid_ext_get_displayid(const struct di_edid_ext *ext)
}
return &ext->displayid;
}
static void *
memdup(const void *ptr, size_t size)
{
void *dst = malloc(size);
if (dst == NULL) {
return NULL;
}
memcpy(dst, ptr, size);
return dst;
}
static struct di_edid_display_descriptor *
dup_display_descriptor(const struct di_edid_display_descriptor *desc)
{
struct di_edid_display_descriptor *copy;
size_t i;
struct di_edid_standard_timing *standard_timing;
struct di_edid_color_point *color_point;
struct di_edid_cvt_timing_code *cvt_timing_code;
copy = memdup(desc, sizeof(*desc));
if (copy == NULL) {
return NULL;
}
copy->standard_timings_len = 0;
copy->color_points_len = 0;
copy->cvt_timing_codes_len = 0;
for (i = 0; i < desc->standard_timings_len; i++) {
standard_timing = memdup(desc->standard_timings[i], sizeof(*standard_timing));
if (standard_timing == NULL) {
goto error;
}
copy->standard_timings[copy->standard_timings_len++] = standard_timing;
}
for (i = 0; i < desc->color_points_len; i++) {
color_point = memdup(desc->color_points[i], sizeof(*color_point));
if (color_point == NULL) {
goto error;
}
copy->color_points[copy->color_points_len++] = color_point;
}
for (i = 0; i < desc->cvt_timing_codes_len; i++) {
cvt_timing_code = memdup(desc->cvt_timing_codes[i], sizeof(*cvt_timing_code));
if (cvt_timing_code == NULL) {
goto error;
}
copy->cvt_timing_codes[copy->cvt_timing_codes_len++] = cvt_timing_code;
}
return copy;
error:
destroy_display_descriptor(copy);
return NULL;
}
struct di_edid *
di_edid_dup(const struct di_edid *edid)
{
struct di_edid *copy;
size_t i;
struct di_edid_standard_timing *standard_timing;
struct di_edid_detailed_timing_def_priv *detailed_timing_def;
struct di_edid_display_descriptor *desc;
copy = memdup(edid, sizeof(*edid));
if (copy == NULL) {
return NULL;
}
copy->standard_timings_len = 0;
copy->detailed_timing_defs_len = 0;
copy->display_descriptors_len = 0;
copy->exts_len = 0;
for (i = 0; i < edid->standard_timings_len; i++) {
standard_timing = memdup(edid->standard_timings[i], sizeof(*standard_timing));
if (standard_timing == NULL) {
goto error;
}
copy->standard_timings[copy->standard_timings_len++] = standard_timing;
}
for (i = 0; i < edid->detailed_timing_defs_len; i++) {
detailed_timing_def = memdup(edid->detailed_timing_defs[i], sizeof(*detailed_timing_def));
if (detailed_timing_def == NULL) {
goto error;
}
copy->detailed_timing_defs[copy->detailed_timing_defs_len++] = detailed_timing_def;
}
for (i = 0; i < edid->display_descriptors_len; i++) {
desc = dup_display_descriptor(edid->display_descriptors[i]);
if (desc == NULL) {
goto error;
}
copy->display_descriptors[copy->display_descriptors_len++] = desc;
}
/* TODO: extensions */
return copy;
error:
di_edid_destroy(copy);
return NULL;
}

9
include/libdisplay-info/edid.h
View file

@ -24,6 +24,15 @@ struct di_edid;
void
di_edid_destroy(struct di_edid *edid);
/*
* Duplicate an EDID.
*
* The caller is responsible for cleaning up the returned struct di_edid via
* di_edid_destroy().
*/
struct di_edid *
di_edid_dup(const struct di_edid *edid);
/**
* Get the EDID version.
*/