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[njs] Added njs_vm_value_string_create() and njs_vm_value_string_create_chb().

Dmitry Volyntsev
January 26, 2023 01:02AM
details: https://hg.nginx.org/njs/rev/742347841e34
branches:
changeset: 2027:742347841e34
user: Dmitry Volyntsev <xeioex@nginx.com>
date: Fri Jan 20 20:15:03 2023 -0800
description:
Added njs_vm_value_string_create() and njs_vm_value_string_create_chb().

Unlike njs_vm_value_string_set() the new functions always check the
input string for a valid UTF8 and calculate UTF8 character length by
themselves.

diffstat:

src/njs.h | 4 ++++
src/njs_chb.h | 2 +-
src/njs_json.c | 11 +++--------
src/njs_regexp.c | 18 +++---------------
src/njs_string.c | 46 ++++++++++++++++++++++++++++++++--------------
src/njs_string.h | 2 ++
src/njs_vm.c | 16 ++++++++++++++++
src/test/njs_unit_test.c | 15 ---------------
8 files changed, 61 insertions(+), 53 deletions(-)

diffs (255 lines):

diff -r 8b9414a6e557 -r 742347841e34 src/njs.h
--- a/src/njs.h Wed Jan 18 18:33:23 2023 -0800
+++ b/src/njs.h Fri Jan 20 20:15:03 2023 -0800
@@ -411,6 +411,10 @@ NJS_EXPORT njs_int_t njs_vm_value_string
const u_char *start, uint32_t size);
NJS_EXPORT u_char *njs_vm_value_string_alloc(njs_vm_t *vm, njs_value_t *value,
uint32_t size);
+NJS_EXPORT njs_int_t njs_vm_value_string_create(njs_vm_t *vm,
+ njs_value_t *value, const u_char *start, uint32_t size);
+NJS_EXPORT njs_int_t njs_vm_value_string_create_chb(njs_vm_t *vm,
+ njs_value_t *value, njs_chb_t *chain);
NJS_EXPORT njs_int_t njs_vm_value_string_copy(njs_vm_t *vm, njs_str_t *retval,
njs_value_t *value, uintptr_t *next);
NJS_EXPORT njs_int_t njs_vm_string_compare(const njs_value_t *v1,
diff -r 8b9414a6e557 -r 742347841e34 src/njs_chb.h
--- a/src/njs_chb.h Wed Jan 18 18:33:23 2023 -0800
+++ b/src/njs_chb.h Fri Jan 20 20:15:03 2023 -0800
@@ -105,7 +105,7 @@ njs_chb_utf8_length(njs_chb_t *chain)
while (n != NULL) {
len = njs_utf8_length(n->start, njs_chb_node_size(n));
if (njs_slow_path(len < 0)) {
- return 0;
+ return -1;
}

length += len;
diff -r 8b9414a6e557 -r 742347841e34 src/njs_json.c
--- a/src/njs_json.c Wed Jan 18 18:33:23 2023 -0800
+++ b/src/njs_json.c Fri Jan 20 20:15:03 2023 -0800
@@ -1090,8 +1090,7 @@ static njs_int_t
njs_json_stringify_iterator(njs_vm_t *vm, njs_json_stringify_t *stringify,
njs_value_t *object)
{
- u_char *p;
- int64_t size, length;
+ int64_t size;
njs_int_t ret;
njs_chb_t chain;
njs_value_t *key, *value, index, wrapper;
@@ -1224,16 +1223,12 @@ done:
goto release;
}

- length = njs_chb_utf8_length(&chain);
-
- p = njs_string_alloc(vm, &vm->retval, size, length);
- if (njs_slow_path(p == NULL)) {
+ ret = njs_string_create_chb(vm, &vm->retval, &chain);
+ if (njs_slow_path(ret != NJS_OK)) {
njs_chb_destroy(&chain);
goto memory_error;
}

- njs_chb_join_to(&chain, p);
-
release:

njs_chb_destroy(&chain);
diff -r 8b9414a6e557 -r 742347841e34 src/njs_regexp.c
--- a/src/njs_regexp.c Wed Jan 18 18:33:23 2023 -0800
+++ b/src/njs_regexp.c Fri Jan 20 20:15:03 2023 -0800
@@ -1197,8 +1197,7 @@ static njs_int_t
njs_regexp_prototype_symbol_replace(njs_vm_t *vm, njs_value_t *args,
njs_uint_t nargs, njs_index_t unused)
{
- u_char *p;
- int64_t n, last_index, ncaptures, pos, next_pos, size, length;
+ int64_t n, last_index, ncaptures, pos, next_pos, length;
njs_str_t rep, m;
njs_int_t ret;
njs_arr_t results;
@@ -1455,23 +1454,12 @@ njs_regexp_prototype_symbol_replace(njs_
njs_chb_append(&chain, &s.start[next_pos], s.size - next_pos);
}

- size = njs_chb_size(&chain);
- if (njs_slow_path(size < 0)) {
- njs_memory_error(vm);
+ ret = njs_string_create_chb(vm, &vm->retval, &chain);
+ if (njs_slow_path(ret != NJS_OK)) {
ret = NJS_ERROR;
goto exception;
}

- length = njs_chb_utf8_length(&chain);
-
- p = njs_string_alloc(vm, &vm->retval, size, length);
- if (njs_slow_path(p == NULL)) {
- ret = NJS_ERROR;
- goto exception;
- }
-
- njs_chb_join_to(&chain, p);
-
ret = NJS_OK;

exception:
diff -r 8b9414a6e557 -r 742347841e34 src/njs_string.c
--- a/src/njs_string.c Wed Jan 18 18:33:23 2023 -0800
+++ b/src/njs_string.c Fri Jan 20 20:15:03 2023 -0800
@@ -147,6 +147,35 @@ njs_string_create(njs_vm_t *vm, njs_valu


njs_int_t
+njs_string_create_chb(njs_vm_t *vm, njs_value_t *value, njs_chb_t *chain)
+{
+ u_char *p;
+ ssize_t size, length;
+
+ size = njs_chb_size(chain);
+ if (njs_slow_path(size < 0)) {
+ njs_memory_error(vm);
+ return NJS_ERROR;
+ }
+
+ length = njs_chb_utf8_length(chain);
+ if (njs_slow_path(length < 0)) {
+ njs_memory_error(vm);
+ return NJS_ERROR;
+ }
+
+ p = njs_string_alloc(vm, value, size, length);
+ if (njs_slow_path(p == NULL)) {
+ return NJS_ERROR;
+ }
+
+ njs_chb_join_to(chain, p);
+
+ return NJS_OK;
+}
+
+
+njs_int_t
njs_string_new(njs_vm_t *vm, njs_value_t *value, const u_char *start,
uint32_t size, uint32_t length)
{
@@ -3489,7 +3518,7 @@ njs_string_get_substitution(njs_vm_t *vm
njs_value_t *string, int64_t pos, njs_value_t *captures, int64_t ncaptures,
njs_value_t *groups, njs_value_t *replacement, njs_value_t *retval)
{
- int64_t tail, size, length, n;
+ int64_t tail, n;
u_char c, c2, *p, *r, *end;
njs_str_t rep, m, str, cap;
njs_int_t ret;
@@ -3620,23 +3649,12 @@ njs_string_get_substitution(njs_vm_t *vm

done:

- size = njs_chb_size(&chain);
- if (njs_slow_path(size < 0)) {
- njs_memory_error(vm);
+ ret = njs_string_create_chb(vm, retval, &chain);
+ if (njs_slow_path(ret != NJS_OK)) {
ret = NJS_ERROR;
goto exception;
}

- length = njs_chb_utf8_length(&chain);
-
- p = njs_string_alloc(vm, retval, size, length);
- if (njs_slow_path(p == NULL)) {
- ret = NJS_ERROR;
- goto exception;
- }
-
- njs_chb_join_to(&chain, p);
-
ret = NJS_OK;

exception:
diff -r 8b9414a6e557 -r 742347841e34 src/njs_string.h
--- a/src/njs_string.h Wed Jan 18 18:33:23 2023 -0800
+++ b/src/njs_string.h Fri Jan 20 20:15:03 2023 -0800
@@ -200,6 +200,8 @@ njs_int_t njs_string_new(njs_vm_t *vm, n
uint32_t size, uint32_t length);
njs_int_t njs_string_create(njs_vm_t *vm, njs_value_t *value, const char *src,
size_t size);
+njs_int_t njs_string_create_chb(njs_vm_t *vm, njs_value_t *value,
+ njs_chb_t *chain);

void njs_encode_hex(njs_str_t *dst, const njs_str_t *src);
size_t njs_encode_hex_length(const njs_str_t *src, size_t *out_size);
diff -r 8b9414a6e557 -r 742347841e34 src/njs_vm.c
--- a/src/njs_vm.c Wed Jan 18 18:33:23 2023 -0800
+++ b/src/njs_vm.c Fri Jan 20 20:15:03 2023 -0800
@@ -832,6 +832,22 @@ njs_vm_value_string_alloc(njs_vm_t *vm,
}


+njs_int_t
+njs_vm_value_string_create(njs_vm_t *vm, njs_value_t *value,
+ const u_char *start, uint32_t size)
+{
+ return njs_string_create(vm, value, (const char *) start, size);
+}
+
+
+njs_int_t
+njs_vm_value_string_create_chb(njs_vm_t *vm, njs_value_t *value,
+ njs_chb_t *chain)
+{
+ return njs_string_create_chb(vm, value, chain);
+}
+
+
njs_function_t *
njs_vm_function(njs_vm_t *vm, const njs_str_t *path)
{
diff -r 8b9414a6e557 -r 742347841e34 src/test/njs_unit_test.c
--- a/src/test/njs_unit_test.c Wed Jan 18 18:33:23 2023 -0800
+++ b/src/test/njs_unit_test.c Fri Jan 20 20:15:03 2023 -0800
@@ -8984,9 +8984,6 @@ static njs_unit_test_t njs_test[] =
{ njs_str("'abc'.replace(/b/g, '$0')"),
njs_str("a$0c") },

- { njs_str("typeof String.bytesFrom(Array(15).fill(0xE3)).replace(/^/g, 1)"),
- njs_str("string") },
-
{ njs_str("'abc'.replace(/^/g, '|$&|')"),
njs_str("||abc") },

@@ -9060,12 +9057,6 @@ static njs_unit_test_t njs_test[] =
"r[Symbol.replace]('foo', function() {m = arguments[0]}); [m, typeof m]"),
njs_str("undefined,string") },

- { njs_str("String.bytesFrom([253,242,141,10]).replace(/\\s/g, 'X')[3]"),
- njs_str("X") },
-
- { njs_str("String.bytesFrom([255,149,15,97,95]).replace(/_/g, 'X')[4]"),
- njs_str("X") },
-
{ njs_str("var a = [];"
"a[2] = '';"
"var re = /any_regexp/;"
@@ -9271,9 +9262,6 @@ static njs_unit_test_t njs_test[] =
"a +' '+ a.length"),
njs_str("αα 4") },

- { njs_str("typeof String.bytesFrom(Array(15).fill(0xE3)).match(/^/g)"),
- njs_str("object") },
-
{ njs_str("'abc'.split()"),
njs_str("abc") },

@@ -18082,9 +18070,6 @@ static njs_unit_test_t njs_test[] =
{ njs_str("JSON.stringify('\\u00CE\\u00B1\\u00C2\\u00B6'.toBytes())"),
njs_str("\"α¶\"") },

- { njs_str("JSON.stringify('µ§±®'.toBytes())"),
- njs_str("\"\xB5\xA7\xB1\xAE\"") },
-
/* Optional arguments. */

{ njs_str("JSON.stringify(undefined, undefined, 1)"),
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Subject Author Views Posted

[njs] Added njs_vm_value_string_create() and njs_vm_value_string_create_chb().

Dmitry Volyntsev 387 January 26, 2023 01:02AM



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