1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
const std = @import("std");
const expect = std.testing.expect;
usingnamespace @import("string_types.zig");
pub const MutableString = struct {
allocator: *std.mem.Allocator,
list: std.ArrayListUnmanaged(u8),
pub const Writer = std.io.Writer(*@This(), anyerror, MutableString.writeAll);
pub fn writer(self: *MutableString) Writer {
return Writer{
.context = self,
};
}
pub fn deinit(str: *MutableString) void {
str.list.deinit(str.allocator);
}
pub fn growIfNeeded(self: *MutableString, amount: usize) !void {
try self.list.ensureUnusedCapacity(self.allocator, amount);
}
pub fn writeAll(self: *MutableString, bytes: string) !usize {
try self.list.appendSlice(self.allocator, bytes);
return self.list.items.len;
}
pub fn init(allocator: *std.mem.Allocator, capacity: usize) !MutableString {
return MutableString{ .allocator = allocator, .list = try std.ArrayListUnmanaged(u8).initCapacity(allocator, capacity) };
}
pub fn initCopy(allocator: *std.mem.Allocator, str: anytype) !MutableString {
var mutable = try MutableString.init(allocator, std.mem.len(str));
try mutable.copy(str);
return mutable;
}
// Convert it to an ASCII identifier. Note: If you change this to a non-ASCII
// identifier, you're going to potentially cause trouble with non-BMP code
// points in target environments that don't support bracketed Unicode escapes.
pub fn ensureValidIdentifier(str: string, allocator: *std.mem.Allocator) !string {
if (str.len == 0) {
return "_";
}
var has_needed_gap = false;
var needs_gap = false;
var start_i: usize = 0;
// Common case: no gap necessary. No allocation necessary.
needs_gap = std.ascii.isAlNum(str[0]);
if (!needs_gap) {
// Are there any non-alphanumeric chars at all?
for (str[1..str.len]) |c, i| {
switch (c) {
'a'...'z', 'A'...'Z', '0'...'9' => {},
else => {
needs_gap = true;
start_i = i;
break;
},
}
}
}
if (needs_gap) {
var mutable = try MutableString.initCopy(allocator, str[0..start_i]);
for (str[start_i..str.len]) |c, i| {
if (std.ascii.isLower(c) or std.ascii.isUpper(c) or (mutable.len() > 0 and std.ascii.isAlNum(c))) {
if (needs_gap) {
try mutable.appendChar('_');
needs_gap = false;
has_needed_gap = true;
}
try mutable.appendChar(c);
} else if (!needs_gap) {
needs_gap = true;
}
}
return mutable.list.toOwnedSlice(allocator);
}
return str;
}
pub fn len(self: *MutableString) usize {
return self.list.items.len;
}
pub fn copy(self: *MutableString, str: anytype) !void {
try self.list.ensureCapacity(self.allocator, std.mem.len(str[0..]));
if (self.list.items.len == 0) {
try self.list.insertSlice(self.allocator, 0, str);
} else {
try self.list.replaceRange(self.allocator, 0, std.mem.len(str[0..]), str[0..]);
}
}
pub fn growBy(self: *MutableString, amount: usize) callconv(.Inline) !void {
try self.list.ensureUnusedCapacity(self.allocator, amount);
}
pub fn appendChar(self: *MutableString, char: u8) callconv(.Inline) !void {
try self.list.append(self.allocator, char);
}
pub fn appendCharAssumeCapacity(self: *MutableString, char: u8) callconv(.Inline) void {
self.list.appendAssumeCapacity(char);
}
pub fn append(self: *MutableString, char: []const u8) callconv(.Inline) !void {
try self.list.appendSlice(self.allocator, char);
}
pub fn appendAssumeCapacity(self: *MutableString, char: []const u8) callconv(.Inline) void {
self.list.appendSliceAssumeCapacity(
char,
);
}
pub fn lenI(self: *MutableString) callconv(.Inline) i32 {
return @intCast(i32, self.list.items.len);
}
pub fn toOwnedSlice(self: *MutableString) string {
return self.list.toOwnedSlice(self.allocator);
}
pub fn toOwnedSliceLeaky(self: *MutableString) []u8 {
return self.list.items;
}
pub fn toOwnedSliceLength(self: *MutableString, length: usize) string {
self.list.shrinkAndFree(self.allocator, length);
return self.list.toOwnedSlice(self.allocator);
}
// pub fn deleteAt(self: *MutableString, i: usize) {
// self.list.swapRemove(i);
// }
pub fn containsChar(self: *MutableString, char: u8) bool {
return self.indexOfChar(char) != null;
}
pub fn indexOfChar(self: *MutableString, char: u8) ?usize {
return std.mem.indexOfScalar(@TypeOf(char), self.list.items, char);
}
pub fn lastIndexOfChar(self: *MutableString, char: u8) ?usize {
return std.mem.lastIndexOfScalar(@TypeOf(char), self.list.items, char);
}
pub fn lastIndexOf(self: *MutableString, str: u8) ?usize {
return std.mem.lastIndexOf(u8, self.list.items, str);
}
pub fn indexOf(self: *MutableString, str: u8) ?usize {
return std.mem.indexOf(u8, self.list.items, str);
}
pub fn eql(self: *MutableString, other: anytype) bool {
return std.mem.eql(u8, self.list.items, other);
}
};
test "MutableString" {
const alloc = std.heap.page_allocator;
var str = try MutableString.initCopy(alloc, "hello");
expect(str.eql("hello"));
}
test "MutableString.ensureValidIdentifier" {
const alloc = std.heap.page_allocator;
std.testing.expectEqualStrings("jquery", try MutableString.ensureValidIdentifier("jquery", alloc));
std.testing.expectEqualStrings("jquery_foo", try MutableString.ensureValidIdentifier("jquery😋foo", alloc));
}
|
