Add support for output of strings and streams of bytes.
Signed-off-by: Simon Glass sjg@chromium.org Reviewed-by: Wolfgang Wallner wolfgang.wallner@br-automation.com Reviewed-by: Bin Meng bmeng.cn@gmail.com ---
Changes in v4: - Use NULL instead of NUL and drop the 'NUL character' comment
include/acpi/acpigen.h | 19 +++++++++++++++++++ lib/acpi/acpigen.c | 14 ++++++++++++++ test/dm/acpigen.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 75 insertions(+)
diff --git a/include/acpi/acpigen.h b/include/acpi/acpigen.h index 8809cdb4e1..9c1faf7bf2 100644 --- a/include/acpi/acpigen.h +++ b/include/acpi/acpigen.h @@ -46,4 +46,23 @@ void acpigen_emit_word(struct acpi_ctx *ctx, uint data); */ void acpigen_emit_dword(struct acpi_ctx *ctx, uint data);
+/** + * acpigen_emit_stream() - Emit a stream of bytes + * + * @ctx: ACPI context pointer + * @data: Data to output + * @size: Size of data in bytes + */ +void acpigen_emit_stream(struct acpi_ctx *ctx, const char *data, int size); + +/** + * acpigen_emit_string() - Emit a string + * + * Emit a string with a null terminator + * + * @ctx: ACPI context pointer + * @str: String to output, or NULL for an empty string + */ +void acpigen_emit_string(struct acpi_ctx *ctx, const char *str); + #endif diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c index a42ae26494..671f1d0eea 100644 --- a/lib/acpi/acpigen.c +++ b/lib/acpi/acpigen.c @@ -37,3 +37,17 @@ void acpigen_emit_dword(struct acpi_ctx *ctx, uint data) acpigen_emit_byte(ctx, (data >> 16) & 0xff); acpigen_emit_byte(ctx, (data >> 24) & 0xff); } + +void acpigen_emit_stream(struct acpi_ctx *ctx, const char *data, int size) +{ + int i; + + for (i = 0; i < size; i++) + acpigen_emit_byte(ctx, data[i]); +} + +void acpigen_emit_string(struct acpi_ctx *ctx, const char *str) +{ + acpigen_emit_stream(ctx, str, str ? strlen(str) : 0); + acpigen_emit_byte(ctx, '\0'); +} diff --git a/test/dm/acpigen.c b/test/dm/acpigen.c index a4adfbfdf8..26d1b76db4 100644 --- a/test/dm/acpigen.c +++ b/test/dm/acpigen.c @@ -20,6 +20,9 @@ /* Maximum size of the ACPI context needed for most tests */ #define ACPI_CONTEXT_SIZE 150
+#define TEST_STRING "frogmore" +#define TEST_STREAM2 "\xfa\xde" + static int alloc_context(struct acpi_ctx **ctxp) { struct acpi_ctx *ctx; @@ -73,6 +76,45 @@ static int dm_test_acpi_emit_simple(struct unit_test_state *uts) } DM_TEST(dm_test_acpi_emit_simple, 0);
+/* Test emitting a stream */ +static int dm_test_acpi_emit_stream(struct unit_test_state *uts) +{ + struct acpi_ctx *ctx; + u8 *ptr; + + ut_assertok(alloc_context(&ctx)); + + ptr = acpigen_get_current(ctx); + acpigen_emit_stream(ctx, TEST_STREAM2, 2); + ut_asserteq(2, acpigen_get_current(ctx) - ptr); + ut_asserteq((u8)TEST_STREAM2[0], ptr[0]); + ut_asserteq((u8)TEST_STREAM2[1], ptr[1]); + + free_context(&ctx); + + return 0; +} +DM_TEST(dm_test_acpi_emit_stream, 0); + +/* Test emitting a string */ +static int dm_test_acpi_emit_string(struct unit_test_state *uts) +{ + struct acpi_ctx *ctx; + u8 *ptr; + + ut_assertok(alloc_context(&ctx)); + + ptr = acpigen_get_current(ctx); + acpigen_emit_string(ctx, TEST_STRING); + ut_asserteq(sizeof(TEST_STRING), acpigen_get_current(ctx) - ptr); + ut_asserteq_str(TEST_STRING, (char *)ptr); + + free_context(&ctx); + + return 0; +} +DM_TEST(dm_test_acpi_emit_string, 0); + /* Test emitting an interrupt descriptor */ static int dm_test_acpi_interrupt(struct unit_test_state *uts) {