10999ea628
Convert the remaining files in src/drivers to use SPDX identifiers. int15.h and default_brightness_levels.asl did not have license headers, but they were both copied from other GPL2 files, so they should be under the GPL2 as well. ne2k.c and drm_dp_helper.h are licensed under custom BSD-like licenses that do not have an SPDX equivalent, so they are added as exceptions to the license header lint. Change-Id: I87fb1c637b8d11b0463f7c19f70b847413e14aed Signed-off-by: Jacob Garber <jgarber1@ualberta.ca> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41601 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause */
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/*
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* This is a copy from upstream:
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* https://chromium.googlesource.com/chromiumos/platform/vpd/+/master/lib/vpd_decode.c
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*/
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#include "vpd_decode.h"
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static int vpd_decode_len(
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const u32 max_len, const u8 *in, u32 *length, u32 *decoded_len)
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{
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u8 more;
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int i = 0;
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if (!length || !decoded_len)
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return VPD_DECODE_FAIL;
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*length = 0;
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do {
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if (i >= max_len)
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return VPD_DECODE_FAIL;
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more = in[i] & 0x80;
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*length <<= 7;
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*length |= in[i] & 0x7f;
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++i;
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} while (more);
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*decoded_len = i;
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return VPD_DECODE_OK;
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}
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static int vpd_decode_entry(
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const u32 max_len, const u8 *input_buf, u32 *consumed,
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const u8 **entry, u32 *entry_len)
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{
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u32 decoded_len;
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if (vpd_decode_len(max_len - *consumed, &input_buf[*consumed],
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entry_len, &decoded_len) != VPD_DECODE_OK)
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return VPD_DECODE_FAIL;
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if (max_len - *consumed < decoded_len)
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return VPD_DECODE_FAIL;
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*consumed += decoded_len;
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*entry = input_buf + *consumed;
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/* entry_len is untrusted data and must be checked again. */
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if (max_len - *consumed < *entry_len)
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return VPD_DECODE_FAIL;
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*consumed += *entry_len;
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return VPD_DECODE_OK;
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}
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int vpd_decode_string(
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const u32 max_len, const u8 *input_buf, u32 *consumed,
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vpd_decode_callback callback, void *callback_arg)
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{
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int type;
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u32 key_len;
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u32 value_len;
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const u8 *key;
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const u8 *value;
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/* type */
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if (*consumed >= max_len)
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return VPD_DECODE_FAIL;
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type = input_buf[*consumed];
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switch (type) {
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case VPD_TYPE_INFO:
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case VPD_TYPE_STRING:
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(*consumed)++;
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if (vpd_decode_entry(max_len, input_buf, consumed, &key,
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&key_len) != VPD_DECODE_OK)
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return VPD_DECODE_FAIL;
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if (vpd_decode_entry(max_len, input_buf, consumed, &value,
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&value_len) != VPD_DECODE_OK)
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return VPD_DECODE_FAIL;
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if (type == VPD_TYPE_STRING)
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return callback(key, key_len, value, value_len,
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callback_arg);
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break;
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default:
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return VPD_DECODE_FAIL;
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}
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return VPD_DECODE_OK;
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}
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