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[opt](exec) Replace get_utf8_byte_length function by array #13664

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Merged
HappenLee merged 2 commits into from
Oct 27, 2022
Merged

[opt](exec) Replace get_utf8_byte_length function by array #13664

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aec5e68
[opt](exec) Replace get_utf8_byte_length function by array
HappenLee Oct 25, 2022
df1d722
change unsigned to unsigned char
HappenLee Oct 26, 2022
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10 changes: 5 additions & 5 deletions be/src/exprs/string_functions.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@ void StringFunctions::init() {}
size_t get_char_len(const StringVal& str, std::vector<size_t>* str_index) {
size_t char_len = 0;
for (size_t i = 0, char_size = 0; i < str.len; i += char_size) {
char_size = get_utf8_byte_length((unsigned)(str.ptr)[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(str.ptr)[i]];
str_index->push_back(i);
++char_len;
}
Expand Down Expand Up @@ -65,7 +65,7 @@ StringVal StringFunctions::substring(FunctionContext* context, const StringVal&
size_t byte_pos = 0;
std::vector<size_t> index;
for (size_t i = 0, char_size = 0; i < str.len; i += char_size) {
char_size = get_utf8_byte_length((unsigned)(str.ptr)[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(str.ptr)[i]];
index.push_back(i);
if (pos.val > 0 && index.size() > pos.val + len.val) {
break;
Expand Down Expand Up @@ -328,7 +328,7 @@ IntVal StringFunctions::char_utf8_length(FunctionContext* context, const StringV
}
size_t char_len = 0;
for (size_t i = 0, char_size = 0; i < str.len; i += char_size) {
char_size = get_utf8_byte_length((unsigned)(str.ptr)[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(str.ptr)[i]];
++char_len;
}
return IntVal(char_len);
Expand Down Expand Up @@ -429,7 +429,7 @@ IntVal StringFunctions::instr(FunctionContext* context, const StringVal& str,
if (loc > 0) {
size_t char_len = 0;
for (size_t i = 0, char_size = 0; i < loc; i += char_size) {
char_size = get_utf8_byte_length((unsigned)(str.ptr)[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(str.ptr)[i]];
++char_len;
}
loc = char_len;
Expand Down Expand Up @@ -477,7 +477,7 @@ IntVal StringFunctions::locate_pos(FunctionContext* context, const StringVal& su
// Hive returns the position in the original string starting from 1.
size_t char_len = 0;
for (size_t i = 0, char_size = 0; i < match_pos; i += char_size) {
char_size = get_utf8_byte_length((unsigned)(adjusted_str.ptr)[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(adjusted_str.ptr)[i]];
++char_len;
}
match_pos = char_len;
Expand Down
29 changes: 11 additions & 18 deletions be/src/util/simd/vstring_function.h
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Expand Up @@ -30,23 +30,16 @@

namespace doris {

static size_t get_utf8_byte_length(unsigned char byte) {
size_t char_size = 0;
if (byte >= 0xFC) {
char_size = 6;
} else if (byte >= 0xF8) {
char_size = 5;
} else if (byte >= 0xF0) {
char_size = 4;
} else if (byte >= 0xE0) {
char_size = 3;
} else if (byte >= 0xC0) {
char_size = 2;
} else {
char_size = 1;
}
return char_size;
}
static constexpr std::array<uint8, 256> UTF8_BYTE_LENGTH = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6};

namespace simd {

Expand Down Expand Up @@ -149,7 +142,7 @@ class VStringFunctions {
}
} else {
for (size_t i = 0, char_size = 0; i < str.len; i += char_size) {
char_size = get_utf8_byte_length((unsigned)(str.ptr)[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(str.ptr)[i]];
std::copy(str.ptr + i, str.ptr + i + char_size, dst.ptr + str.len - i - char_size);
}
}
Expand Down
22 changes: 4 additions & 18 deletions be/src/vec/functions/function_string.h
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Original file line number Diff line number Diff line change
Expand Up @@ -58,24 +58,10 @@

namespace doris::vectorized {

inline size_t get_utf8_byte_length(unsigned char byte) {
size_t char_size = 0;
if (byte < 0xC0) {
char_size = 1;
} else if (byte >= 0xF0) {
char_size = 4;
} else if (byte >= 0xE0) {
char_size = 3;
} else {
char_size = 2;
}
return char_size;
}

inline size_t get_char_len(const std::string_view& str, std::vector<size_t>* str_index) {
size_t char_len = 0;
for (size_t i = 0, char_size = 0; i < str.length(); i += char_size) {
char_size = get_utf8_byte_length(str[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)str[i]];
str_index->push_back(i);
++char_len;
}
Expand All @@ -85,7 +71,7 @@ inline size_t get_char_len(const std::string_view& str, std::vector<size_t>* str
inline size_t get_char_len(const StringVal& str, std::vector<size_t>* str_index) {
size_t char_len = 0;
for (size_t i = 0, char_size = 0; i < str.len; i += char_size) {
char_size = get_utf8_byte_length((unsigned)(str.ptr)[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(str.ptr)[i]];
str_index->push_back(i);
++char_len;
}
Expand All @@ -95,7 +81,7 @@ inline size_t get_char_len(const StringVal& str, std::vector<size_t>* str_index)
inline size_t get_char_len(const StringValue& str, size_t end_pos) {
size_t char_len = 0;
for (size_t i = 0, char_size = 0; i < std::min(str.len, end_pos); i += char_size) {
char_size = get_utf8_byte_length((unsigned)(str.ptr)[i]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(str.ptr)[i]];
++char_len;
}
return char_len;
Expand Down Expand Up @@ -192,7 +178,7 @@ struct SubstringUtil {
size_t byte_pos = 0;
index.clear();
for (size_t j = 0, char_size = 0; j < str_size; j += char_size) {
char_size = get_utf8_byte_length((unsigned)(raw_str)[j]);
char_size = UTF8_BYTE_LENGTH[(unsigned char)(raw_str)[j]];
index.push_back(j);
if (start[i] > 0 && index.size() > start[i] + len[i]) {
break;
Expand Down