From: Maxime Ripard <maxime.ripard@bootlin.com> To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Sean Paul <seanpaul@chromium.org>, Maxime Ripard <maxime.ripard@bootlin.com>, Daniel Vetter <daniel.vetter@intel.com>, David Airlie <airlied@linux.ie> Cc: eben@raspberrypi.org, dri-devel@lists.freedesktop.org, Paul Kocialkowski <paul.kocialkowski@bootlin.com>, Eric Anholt <eric@anholt.net>, Thomas Petazzoni <thomas.petazzoni@bootlin.com>, Maxime Ripard <maxime.ripard@free-electrons.com>, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 1/5] drm/modes: Rewrite the command line parser Date: Thu, 11 Apr 2019 15:22:39 +0200 [thread overview] Message-ID: <9996c66f335786fb6c5396dacfa35b40587a2365.1554988934.git-series.maxime.ripard@bootlin.com> (raw) In-Reply-To: <cover.4699c3850c3c283cf475a0a0914847b1d89b4f4c.1554988934.git-series.maxime.ripard@bootlin.com> From: Maxime Ripard <maxime.ripard@free-electrons.com> Rewrite the command line parser in order to get away from the state machine parsing the video mode lines. Hopefully, this will allow to extend it more easily to support named modes and / or properties set directly on the command line. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> --- drivers/gpu/drm/drm_modes.c | 308 +++++++++++++++++++++++-------------- 1 file changed, 193 insertions(+), 115 deletions(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 56f92a0bba62..bbacb7743f3b 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -30,6 +30,7 @@ * authorization from the copyright holder(s) and author(s). */ +#include <linux/ctype.h> #include <linux/list.h> #include <linux/list_sort.h> #include <linux/export.h> @@ -1405,6 +1406,131 @@ void drm_connector_list_update(struct drm_connector *connector) } EXPORT_SYMBOL(drm_connector_list_update); +static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, + struct drm_cmdline_mode *mode) +{ + if (str[0] != '-') + return -EINVAL; + + mode->bpp = simple_strtol(str + 1, end_ptr, 10); + mode->bpp_specified = true; + + return 0; +} + +static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, + struct drm_cmdline_mode *mode) +{ + if (str[0] != '@') + return -EINVAL; + + mode->refresh = simple_strtol(str + 1, end_ptr, 10); + mode->refresh_specified = true; + + return 0; +} + +static int drm_mode_parse_cmdline_extra(const char *str, int length, + struct drm_connector *connector, + struct drm_cmdline_mode *mode) +{ + int i; + + for (i = 0; i < length; i++) { + switch (str[i]) { + case 'i': + mode->interlace = true; + break; + case 'm': + mode->margins = true; + break; + case 'D': + if (mode->force != DRM_FORCE_UNSPECIFIED) + return -EINVAL; + + if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && + (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) + mode->force = DRM_FORCE_ON; + else + mode->force = DRM_FORCE_ON_DIGITAL; + break; + case 'd': + if (mode->force != DRM_FORCE_UNSPECIFIED) + return -EINVAL; + + mode->force = DRM_FORCE_OFF; + break; + case 'e': + if (mode->force != DRM_FORCE_UNSPECIFIED) + return -EINVAL; + + mode->force = DRM_FORCE_ON; + break; + default: + return -EINVAL; + } + } + + return 0; +} + +static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, + bool extras, + struct drm_connector *connector, + struct drm_cmdline_mode *mode) +{ + bool rb = false, cvt = false; + int xres = 0, yres = 0; + int remaining, i; + char *end_ptr; + + xres = simple_strtol(str, &end_ptr, 10); + + if (end_ptr[0] != 'x') + return -EINVAL; + end_ptr++; + + yres = simple_strtol(end_ptr, &end_ptr, 10); + + remaining = length - (end_ptr - str); + if (remaining < 0) + return -EINVAL; + + for (i = 0; i < remaining; i++) { + switch (end_ptr[i]) { + case 'M': + cvt = true; + break; + case 'R': + rb = true; + break; + default: + /* + * Try to pass that to our extras parsing + * function to handle the case where the + * extras are directly after the resolution + */ + if (extras) { + int ret = drm_mode_parse_cmdline_extra(end_ptr + i, + 1, + connector, + mode); + if (ret) + return ret; + } else { + return -EINVAL; + } + } + } + + mode->xres = xres; + mode->yres = yres; + mode->cvt = cvt; + mode->rb = rb; + + return 0; +} + /** * drm_mode_parse_command_line_for_connector - parse command line modeline for connector * @mode_option: optional per connector mode option @@ -1431,13 +1557,12 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, struct drm_cmdline_mode *mode) { const char *name; - unsigned int namelen; - bool res_specified = false, bpp_specified = false, refresh_specified = false; - unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; - bool yres_specified = false, cvt = false, rb = false; - bool interlace = false, margins = false, was_digit = false; - int i; - enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; + bool parse_extras = false; + unsigned int bpp_off = 0, refresh_off = 0; + unsigned int mode_end = 0; + char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; + char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; + int ret; #ifdef CONFIG_FB if (!mode_option) @@ -1450,127 +1575,80 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, } name = mode_option; - namelen = strlen(name); - for (i = namelen-1; i >= 0; i--) { - switch (name[i]) { - case '@': - if (!refresh_specified && !bpp_specified && - !yres_specified && !cvt && !rb && was_digit) { - refresh = simple_strtol(&name[i+1], NULL, 10); - refresh_specified = true; - was_digit = false; - } else - goto done; - break; - case '-': - if (!bpp_specified && !yres_specified && !cvt && - !rb && was_digit) { - bpp = simple_strtol(&name[i+1], NULL, 10); - bpp_specified = true; - was_digit = false; - } else - goto done; - break; - case 'x': - if (!yres_specified && was_digit) { - yres = simple_strtol(&name[i+1], NULL, 10); - yres_specified = true; - was_digit = false; - } else - goto done; - break; - case '0' ... '9': - was_digit = true; - break; - case 'M': - if (yres_specified || cvt || was_digit) - goto done; - cvt = true; - break; - case 'R': - if (yres_specified || cvt || rb || was_digit) - goto done; - rb = true; - break; - case 'm': - if (cvt || yres_specified || was_digit) - goto done; - margins = true; - break; - case 'i': - if (cvt || yres_specified || was_digit) - goto done; - interlace = true; - break; - case 'e': - if (yres_specified || bpp_specified || refresh_specified || - was_digit || (force != DRM_FORCE_UNSPECIFIED)) - goto done; - force = DRM_FORCE_ON; - break; - case 'D': - if (yres_specified || bpp_specified || refresh_specified || - was_digit || (force != DRM_FORCE_UNSPECIFIED)) - goto done; + if (!isdigit(name[0])) + return false; - if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && - (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) - force = DRM_FORCE_ON; - else - force = DRM_FORCE_ON_DIGITAL; - break; - case 'd': - if (yres_specified || bpp_specified || refresh_specified || - was_digit || (force != DRM_FORCE_UNSPECIFIED)) - goto done; + /* Try to locate the bpp and refresh specifiers, if any */ + bpp_ptr = strchr(name, '-'); + if (bpp_ptr) { + bpp_off = bpp_ptr - name; + mode->bpp_specified = true; + } - force = DRM_FORCE_OFF; - break; - default: - goto done; - } + refresh_ptr = strchr(name, '@'); + if (refresh_ptr) { + if (named_mode) + return false; + + refresh_off = refresh_ptr - name; + mode->refresh_specified = true; } - if (i < 0 && yres_specified) { - char *ch; - xres = simple_strtol(name, &ch, 10); - if ((ch != NULL) && (*ch == 'x')) - res_specified = true; - else - i = ch - name; - } else if (!yres_specified && was_digit) { - /* catch mode that begins with digits but has no 'x' */ - i = 0; + /* Locate the end of the name / resolution, and parse it */ + if (bpp_ptr && refresh_ptr) { + mode_end = min(bpp_off, refresh_off); + } else if (bpp_ptr) { + mode_end = bpp_off; + } else if (refresh_ptr) { + mode_end = refresh_off; + } else { + mode_end = strlen(name); + parse_extras = true; } -done: - if (i >= 0) { - pr_warn("[drm] parse error at position %i in video mode '%s'\n", - i, name); - mode->specified = false; + + ret = drm_mode_parse_cmdline_res_mode(name, mode_end, + parse_extras, + connector, + mode); + if (ret) return false; - } + mode->specified = true; - if (res_specified) { - mode->specified = true; - mode->xres = xres; - mode->yres = yres; + if (bpp_ptr) { + ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); + if (ret) + return false; } - if (refresh_specified) { - mode->refresh_specified = true; - mode->refresh = refresh; + if (refresh_ptr) { + ret = drm_mode_parse_cmdline_refresh(refresh_ptr, + &refresh_end_ptr, mode); + if (ret) + return false; } - if (bpp_specified) { - mode->bpp_specified = true; - mode->bpp = bpp; + /* + * Locate the end of the bpp / refresh, and parse the extras + * if relevant + */ + if (bpp_ptr && refresh_ptr) + extra_ptr = max(bpp_end_ptr, refresh_end_ptr); + else if (bpp_ptr) + extra_ptr = bpp_end_ptr; + else if (refresh_ptr) + extra_ptr = refresh_end_ptr; + + if (extra_ptr) { + int remaining = strlen(name) - (extra_ptr - name); + + /* + * We still have characters to process, while + * we shouldn't have any + */ + if (remaining > 0) + return false; } - mode->rb = rb; - mode->cvt = cvt; - mode->interlace = interlace; - mode->margins = margins; - mode->force = force; return true; } -- git-series 0.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Maxime Ripard <maxime.ripard@bootlin.com> To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Sean Paul <seanpaul@chromium.org>, Maxime Ripard <maxime.ripard@bootlin.com>, Daniel Vetter <daniel.vetter@intel.com>, David Airlie <airlied@linux.ie> Cc: eben@raspberrypi.org, dri-devel@lists.freedesktop.org, Paul Kocialkowski <paul.kocialkowski@bootlin.com>, Thomas Petazzoni <thomas.petazzoni@bootlin.com>, Maxime Ripard <maxime.ripard@free-electrons.com>, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 1/5] drm/modes: Rewrite the command line parser Date: Thu, 11 Apr 2019 15:22:39 +0200 [thread overview] Message-ID: <9996c66f335786fb6c5396dacfa35b40587a2365.1554988934.git-series.maxime.ripard@bootlin.com> (raw) In-Reply-To: <cover.4699c3850c3c283cf475a0a0914847b1d89b4f4c.1554988934.git-series.maxime.ripard@bootlin.com> From: Maxime Ripard <maxime.ripard@free-electrons.com> Rewrite the command line parser in order to get away from the state machine parsing the video mode lines. Hopefully, this will allow to extend it more easily to support named modes and / or properties set directly on the command line. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> --- drivers/gpu/drm/drm_modes.c | 308 +++++++++++++++++++++++-------------- 1 file changed, 193 insertions(+), 115 deletions(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 56f92a0bba62..bbacb7743f3b 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -30,6 +30,7 @@ * authorization from the copyright holder(s) and author(s). */ +#include <linux/ctype.h> #include <linux/list.h> #include <linux/list_sort.h> #include <linux/export.h> @@ -1405,6 +1406,131 @@ void drm_connector_list_update(struct drm_connector *connector) } EXPORT_SYMBOL(drm_connector_list_update); +static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, + struct drm_cmdline_mode *mode) +{ + if (str[0] != '-') + return -EINVAL; + + mode->bpp = simple_strtol(str + 1, end_ptr, 10); + mode->bpp_specified = true; + + return 0; +} + +static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, + struct drm_cmdline_mode *mode) +{ + if (str[0] != '@') + return -EINVAL; + + mode->refresh = simple_strtol(str + 1, end_ptr, 10); + mode->refresh_specified = true; + + return 0; +} + +static int drm_mode_parse_cmdline_extra(const char *str, int length, + struct drm_connector *connector, + struct drm_cmdline_mode *mode) +{ + int i; + + for (i = 0; i < length; i++) { + switch (str[i]) { + case 'i': + mode->interlace = true; + break; + case 'm': + mode->margins = true; + break; + case 'D': + if (mode->force != DRM_FORCE_UNSPECIFIED) + return -EINVAL; + + if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && + (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) + mode->force = DRM_FORCE_ON; + else + mode->force = DRM_FORCE_ON_DIGITAL; + break; + case 'd': + if (mode->force != DRM_FORCE_UNSPECIFIED) + return -EINVAL; + + mode->force = DRM_FORCE_OFF; + break; + case 'e': + if (mode->force != DRM_FORCE_UNSPECIFIED) + return -EINVAL; + + mode->force = DRM_FORCE_ON; + break; + default: + return -EINVAL; + } + } + + return 0; +} + +static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, + bool extras, + struct drm_connector *connector, + struct drm_cmdline_mode *mode) +{ + bool rb = false, cvt = false; + int xres = 0, yres = 0; + int remaining, i; + char *end_ptr; + + xres = simple_strtol(str, &end_ptr, 10); + + if (end_ptr[0] != 'x') + return -EINVAL; + end_ptr++; + + yres = simple_strtol(end_ptr, &end_ptr, 10); + + remaining = length - (end_ptr - str); + if (remaining < 0) + return -EINVAL; + + for (i = 0; i < remaining; i++) { + switch (end_ptr[i]) { + case 'M': + cvt = true; + break; + case 'R': + rb = true; + break; + default: + /* + * Try to pass that to our extras parsing + * function to handle the case where the + * extras are directly after the resolution + */ + if (extras) { + int ret = drm_mode_parse_cmdline_extra(end_ptr + i, + 1, + connector, + mode); + if (ret) + return ret; + } else { + return -EINVAL; + } + } + } + + mode->xres = xres; + mode->yres = yres; + mode->cvt = cvt; + mode->rb = rb; + + return 0; +} + /** * drm_mode_parse_command_line_for_connector - parse command line modeline for connector * @mode_option: optional per connector mode option @@ -1431,13 +1557,12 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, struct drm_cmdline_mode *mode) { const char *name; - unsigned int namelen; - bool res_specified = false, bpp_specified = false, refresh_specified = false; - unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; - bool yres_specified = false, cvt = false, rb = false; - bool interlace = false, margins = false, was_digit = false; - int i; - enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; + bool parse_extras = false; + unsigned int bpp_off = 0, refresh_off = 0; + unsigned int mode_end = 0; + char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; + char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; + int ret; #ifdef CONFIG_FB if (!mode_option) @@ -1450,127 +1575,80 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, } name = mode_option; - namelen = strlen(name); - for (i = namelen-1; i >= 0; i--) { - switch (name[i]) { - case '@': - if (!refresh_specified && !bpp_specified && - !yres_specified && !cvt && !rb && was_digit) { - refresh = simple_strtol(&name[i+1], NULL, 10); - refresh_specified = true; - was_digit = false; - } else - goto done; - break; - case '-': - if (!bpp_specified && !yres_specified && !cvt && - !rb && was_digit) { - bpp = simple_strtol(&name[i+1], NULL, 10); - bpp_specified = true; - was_digit = false; - } else - goto done; - break; - case 'x': - if (!yres_specified && was_digit) { - yres = simple_strtol(&name[i+1], NULL, 10); - yres_specified = true; - was_digit = false; - } else - goto done; - break; - case '0' ... '9': - was_digit = true; - break; - case 'M': - if (yres_specified || cvt || was_digit) - goto done; - cvt = true; - break; - case 'R': - if (yres_specified || cvt || rb || was_digit) - goto done; - rb = true; - break; - case 'm': - if (cvt || yres_specified || was_digit) - goto done; - margins = true; - break; - case 'i': - if (cvt || yres_specified || was_digit) - goto done; - interlace = true; - break; - case 'e': - if (yres_specified || bpp_specified || refresh_specified || - was_digit || (force != DRM_FORCE_UNSPECIFIED)) - goto done; - force = DRM_FORCE_ON; - break; - case 'D': - if (yres_specified || bpp_specified || refresh_specified || - was_digit || (force != DRM_FORCE_UNSPECIFIED)) - goto done; + if (!isdigit(name[0])) + return false; - if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && - (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) - force = DRM_FORCE_ON; - else - force = DRM_FORCE_ON_DIGITAL; - break; - case 'd': - if (yres_specified || bpp_specified || refresh_specified || - was_digit || (force != DRM_FORCE_UNSPECIFIED)) - goto done; + /* Try to locate the bpp and refresh specifiers, if any */ + bpp_ptr = strchr(name, '-'); + if (bpp_ptr) { + bpp_off = bpp_ptr - name; + mode->bpp_specified = true; + } - force = DRM_FORCE_OFF; - break; - default: - goto done; - } + refresh_ptr = strchr(name, '@'); + if (refresh_ptr) { + if (named_mode) + return false; + + refresh_off = refresh_ptr - name; + mode->refresh_specified = true; } - if (i < 0 && yres_specified) { - char *ch; - xres = simple_strtol(name, &ch, 10); - if ((ch != NULL) && (*ch == 'x')) - res_specified = true; - else - i = ch - name; - } else if (!yres_specified && was_digit) { - /* catch mode that begins with digits but has no 'x' */ - i = 0; + /* Locate the end of the name / resolution, and parse it */ + if (bpp_ptr && refresh_ptr) { + mode_end = min(bpp_off, refresh_off); + } else if (bpp_ptr) { + mode_end = bpp_off; + } else if (refresh_ptr) { + mode_end = refresh_off; + } else { + mode_end = strlen(name); + parse_extras = true; } -done: - if (i >= 0) { - pr_warn("[drm] parse error at position %i in video mode '%s'\n", - i, name); - mode->specified = false; + + ret = drm_mode_parse_cmdline_res_mode(name, mode_end, + parse_extras, + connector, + mode); + if (ret) return false; - } + mode->specified = true; - if (res_specified) { - mode->specified = true; - mode->xres = xres; - mode->yres = yres; + if (bpp_ptr) { + ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); + if (ret) + return false; } - if (refresh_specified) { - mode->refresh_specified = true; - mode->refresh = refresh; + if (refresh_ptr) { + ret = drm_mode_parse_cmdline_refresh(refresh_ptr, + &refresh_end_ptr, mode); + if (ret) + return false; } - if (bpp_specified) { - mode->bpp_specified = true; - mode->bpp = bpp; + /* + * Locate the end of the bpp / refresh, and parse the extras + * if relevant + */ + if (bpp_ptr && refresh_ptr) + extra_ptr = max(bpp_end_ptr, refresh_end_ptr); + else if (bpp_ptr) + extra_ptr = bpp_end_ptr; + else if (refresh_ptr) + extra_ptr = refresh_end_ptr; + + if (extra_ptr) { + int remaining = strlen(name) - (extra_ptr - name); + + /* + * We still have characters to process, while + * we shouldn't have any + */ + if (remaining > 0) + return false; } - mode->rb = rb; - mode->cvt = cvt; - mode->interlace = interlace; - mode->margins = margins; - mode->force = force; return true; } -- git-series 0.9.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2019-04-11 13:23 UTC|newest] Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-04-11 13:22 [PATCH v2 0/5] drm/vc4: Allow for more boot-time configuration Maxime Ripard 2019-04-11 13:22 ` Maxime Ripard 2019-04-11 13:22 ` Maxime Ripard [this message] 2019-04-11 13:22 ` [PATCH v2 1/5] drm/modes: Rewrite the command line parser Maxime Ripard 2019-04-12 16:02 ` kbuild test robot 2019-04-12 16:02 ` kbuild test robot 2019-04-11 13:22 ` [PATCH v2 2/5] drm/modes: Support modes names on the command line Maxime Ripard 2019-04-11 13:22 ` Maxime Ripard 2019-04-11 13:22 ` [PATCH v2 3/5] drm/modes: Allow to specify rotation and reflection on the commandline Maxime Ripard 2019-04-11 13:22 ` Maxime Ripard 2019-04-15 16:39 ` Daniel Vetter 2019-04-15 16:39 ` Daniel Vetter 2019-04-16 14:50 ` Noralf Trønnes 2019-04-16 14:50 ` Noralf Trønnes 2019-04-17 14:30 ` Maxime Ripard 2019-04-17 14:30 ` Maxime Ripard 2019-04-17 14:58 ` Noralf Trønnes 2019-04-17 14:58 ` Noralf Trønnes 2019-04-18 7:43 ` Maxime Ripard 2019-04-18 7:43 ` Maxime Ripard 2019-04-11 13:22 ` [PATCH v2 4/5] drm/modes: Parse overscan properties Maxime Ripard 2019-04-11 13:22 ` Maxime Ripard 2019-04-15 16:45 ` Daniel Vetter 2019-04-15 16:45 ` Daniel Vetter 2019-04-16 14:52 ` Noralf Trønnes 2019-04-16 14:52 ` Noralf Trønnes 2019-04-17 14:07 ` Maxime Ripard 2019-04-17 14:07 ` Maxime Ripard 2019-04-17 15:30 ` Noralf Trønnes 2019-04-17 15:30 ` Noralf Trønnes 2019-04-17 15:38 ` Noralf Trønnes 2019-04-17 15:38 ` Noralf Trønnes 2019-04-11 13:22 ` [PATCH v2 5/5] drm/selftests: Add command line parser selftests Maxime Ripard 2019-04-11 13:22 ` Maxime Ripard 2019-04-12 7:18 ` kbuild test robot 2019-04-12 7:18 ` kbuild test robot 2019-04-12 9:55 ` kbuild test robot 2019-04-12 9:55 ` kbuild test robot
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