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0.1.2-beta যোগ করা হয়েছে: ৮ নভে, ২০২৬, ২:৫৩ AM · বিল্ড হয়েছে: ৭ নভে, ২০২৬, ৭:৩২ PM

js.rs যোগ করা হয়েছে: তারিখ নথিভুক্ত নেই ৭.২ KB · 214 লাইন

কোড ফাইল ডাউনলোড করুন

1//! Small helpers that reproduce the JavaScript semantics the 0.1.0 disk model relies on

2//! (`Number()`, truthiness, `String()`), so the Rust port produces identical plans.

4use serde_json::Value;

6/// JavaScript `Number(value)`.

7pub fn number(value: &Value) -> f64 {

8 match value {

9 Value::Null => 0.0,

10 Value::Bool(b) => f64::from(u8::from(*b)),

11 Value::Number(n) => n.as_f64().unwrap_or(f64::NAN),

12 Value::String(s) => number_str(s),

13 Value::Array(a) if a.is_empty() => 0.0,

14 Value::Array(a) if a.len() == 1 => number(&a[0]),

15 _ => f64::NAN,

16 }

17}

19/// JavaScript `Number(text)`.

20pub fn number_str(text: &str) -> f64 {

21 let t = text.trim();

22 if t.is_empty() {

23 return 0.0;

24 }

25 if let Some(hex) = t.strip_prefix("0x").or_else(|| t.strip_prefix("0X")) {

26 return u64::from_str_radix(hex, 16).map(|v| v as f64).unwrap_or(f64::NAN);

27 }

28 if t == "Infinity" || t == "+Infinity" {

29 return f64::INFINITY;

30 }

31 if t == "-Infinity" {

32 return f64::NEG_INFINITY;

33 }

34 if t.chars().any(|c| !(c.is_ascii_digit() || matches!(c, '.' | 'e' | 'E' | '+' | '-'))) {

35 return f64::NAN;

36 }

37 t.parse::<f64>().unwrap_or(f64::NAN)

38}

40/// Undefined-aware `Number(x)` for optional values (`undefined` → NaN).

41pub fn number_opt(value: Option<&Value>) -> f64 {

42 value.map(number).unwrap_or(f64::NAN)

43}

45/// 0.1.0 `int()`: `""`, `null`, `undefined` and non-finite → null.

46pub fn int_opt(value: Option<&Value>) -> Value {

47 match value {

48 None | Some(Value::Null) => Value::Null,

49 Some(Value::String(s)) if s.is_empty() => Value::Null,

50 Some(v) => num(number(v)),

51 }

52}

54pub fn int_str(text: Option<&str>) -> Value {

55 match text {

56 None => Value::Null,

57 Some("") => Value::Null,

58 Some(t) => num(number_str(t)),

59 }

60}

62/// JSON number the way `JSON.stringify` writes it (integers without a fraction, NaN → null).

63pub fn num(value: f64) -> Value {

64 if !value.is_finite() {

65 return Value::Null;

66 }

67 if value.fract() == 0.0 && value.abs() < 9.007_199_254_740_992e15 {

68 return Value::from(value as i64);

69 }

70 serde_json::Number::from_f64(value).map(Value::Number).unwrap_or(Value::Null)

71}

73pub fn truthy(value: &Value) -> bool {

74 match value {

75 Value::Null => false,

76 Value::Bool(b) => *b,

77 Value::Number(n) => n.as_f64().is_some_and(|f| f != 0.0 && !f.is_nan()),

78 Value::String(s) => !s.is_empty(),

79 _ => true,

80 }

81}

83pub fn truthy_opt(value: Option<&Value>) -> bool {

84 value.is_some_and(truthy)

85}

87/// JavaScript `String(value ?? "")`.

88pub fn string(value: Option<&Value>) -> String {

89 match value {

90 None | Some(Value::Null) => String::new(),

91 Some(Value::String(s)) => s.clone(),

92 Some(Value::Number(n)) => match n.as_f64() {

93 Some(f) if f.fract() == 0.0 && f.abs() < 1e21 => format!("{}", f as i64),

94 Some(f) => format!("{f}"),

95 None => n.to_string(),

96 },

97 Some(Value::Bool(b)) => b.to_string(),

98 Some(Value::Array(a)) => a.iter().map(|v| string(Some(v))).collect::<Vec<_>>().join(","),

99 Some(Value::Object(_)) => "[object Object]".into(),

100 }

101}

102

103/// `String(value)` for a step argument (numbers without trailing `.0`).

104pub fn arg(value: &Value) -> String {

105 string(Some(value))

106}

107

108pub fn num_string(value: f64) -> String {

109 if value.is_nan() {

110 return "NaN".into();

111 }

112 if value.is_infinite() {

113 return if value > 0.0 { "Infinity".into() } else { "-Infinity".into() };

114 }

115 string(Some(&num(value)))

116}

117

118/// 0.1.0 `text(value, limit)`: control characters → space, trim, then cut to `limit` UTF-16 units.

119pub fn text(value: &str, limit: usize) -> String {

120 let replaced: String = value.chars().map(|c| if (c as u32) < 0x20 || c as u32 == 0x7f { ' ' } else { c }).collect();

121 cut(replaced.trim(), limit)

122}

123

124pub fn cut(value: &str, limit: usize) -> String {

125 let mut out = String::new();

126 let mut units = 0;

127 for c in value.chars() {

128 units += c.len_utf16();

129 if units > limit {

130 break;

131 }

132 out.push(c);

133 }

134 out

135}

136

137/// `text(...) || null`.

138pub fn text_or_null(value: &str, limit: usize) -> Value {

139 let t = text(value, limit);

140 if t.is_empty() { Value::Null } else { Value::String(t) }

141}

142

143pub fn lines(value: &str) -> Vec<&str> {

144 value.split('\n').map(|l| l.strip_suffix('\r').unwrap_or(l)).filter(|l| !l.is_empty()).collect()

145}

146

147/// `a.localeCompare(b, "en", { numeric: true })` for device names.

148pub fn natural_cmp(a: &str, b: &str) -> std::cmp::Ordering {

149 fn chunks(s: &str) -> Vec<(bool, String)> {

150 let mut out: Vec<(bool, String)> = Vec::new();

151 for c in s.chars() {

152 let digit = c.is_ascii_digit();

153 match out.last_mut() {

154 Some((d, chunk)) if *d == digit => chunk.push(c),

155 _ => out.push((digit, c.to_string())),

156 }

157 }

158 out

159 }

160 let (ca, cb) = (chunks(a), chunks(b));

161 for (x, y) in ca.iter().zip(cb.iter()) {

162 let ordering = match (x.0, y.0) {

163 (true, true) => {

164 let (nx, ny) = (x.1.trim_start_matches('0'), y.1.trim_start_matches('0'));

165 nx.len().cmp(&ny.len()).then_with(|| nx.cmp(ny))

166 }

167 // ICU sorts digits before letters.

168 (true, false) => std::cmp::Ordering::Less,

169 (false, true) => std::cmp::Ordering::Greater,

170 _ => x.1.to_lowercase().cmp(&y.1.to_lowercase()),

171 };

172 if ordering != std::cmp::Ordering::Equal {

173 return ordering;

174 }

175 }

176 ca.len().cmp(&cb.len()).then_with(|| a.cmp(b))

177}

178

179/// Deep equality where numbers compare by value (JSON written by JavaScript vs. Rust).

180pub fn json_equal(a: &Value, b: &Value) -> bool {

181 match (a, b) {

182 (Value::Number(x), Value::Number(y)) => x.as_f64() == y.as_f64(),

183 (Value::Array(x), Value::Array(y)) => x.len() == y.len() && x.iter().zip(y).all(|(p, q)| json_equal(p, q)),

184

        (Value::Object(x), Value::Object(y)) => x.len() == y.len() && x.iter().all(|(k, v)| y.get(k).is_some_and(|w| json_equal(v, w))),

185 _ => a == b,

186 }

187}

188

189/// First path where two JSON values differ (test diagnostics).

190pub fn first_difference(a: &Value, b: &Value, path: &str) -> Option<String> {

191 match (a, b) {

192 (Value::Object(x), Value::Object(y)) => {

193 for (k, v) in x {

194 match y.get(k) {

195 None => return Some(format!("{path}.{k}: missing in second ({v})")),

196 Some(w) => {

197 if let Some(d) = first_difference(v, w, &format!("{path}.{k}")) {

198 return Some(d);

199 }

200 }

201 }

202 }

203 y.keys().find(|k| !x.contains_key(*k)).map(|k| format!("{path}.{k}: missing in first ({})", y[k]))

204 }

205 (Value::Array(x), Value::Array(y)) => {

206 if x.len() != y.len() {

207 return Some(format!("{path}: length {} vs {}", x.len(), y.len()));

208 }

209 x.iter().zip(y).enumerate().find_map(|(i, (p, q))| first_difference(p, q, &format!("{path}[{i}]")))

210 }

211 _ if json_equal(a, b) => None,

212 _ => Some(format!("{path}: {a} vs {b}")),

213 }

214}

215

SHA-256

9953e01ccb0e5a167c00321f9d3e34689de495b6cd86d8118d7deea9d27b6507

CH-J Proprietary Software License 1.14 · সোর্স CH-J Proprietary Software License 1.14-এর অধীনে দেওয়া হয়। এর প্রাপ্যতা লাইসেন্সের শর্ত বদলায় না এবং অতিরিক্ত কোনো অধিকারও দেয় না।

আর্কাইভ SHA-256

ac8fe790f4ba60fc098f8c985fc2656cfcc6cdc21fb34b30e308a2b54e62258f

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