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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
use crate::core::JSObjectDataPtr;
use crate::core::{Expr, Value, evaluate_expr};
use crate::error::JSError;
use crate::unicode::{utf8_to_utf16, utf16_to_utf8};
pub(crate) fn handle_sprintf_call(env: &JSObjectDataPtr, args: &[Expr]) -> Result<Value, JSError> {
log::trace!("handle_sprintf_call called with {} args", args.len());
if args.is_empty() {
return Ok(Value::String(utf8_to_utf16("")));
}
let format_val = evaluate_expr(env, &args[0])?;
let format_str = match format_val {
Value::String(s) => utf16_to_utf8(&s),
_ => {
return Err(raise_eval_error!("sprintf format must be a string"));
}
};
let result = sprintf_impl(env, &format_str, &args[1..])?;
Ok(Value::String(utf8_to_utf16(&result)))
}
pub fn sprintf_impl(env: &JSObjectDataPtr, format: &str, args: &[Expr]) -> Result<String, JSError> {
let mut result = String::new();
let mut arg_index = 0;
let mut chars = format.chars().peekable();
while let Some(ch) = chars.next() {
if ch == '%' {
if let Some(next_ch) = chars.peek()
&& *next_ch == '%'
{
result.push('%');
chars.next();
continue;
}
// Parse format specifier
let mut width = None;
let mut precision = None;
let mut flags = String::new();
let mut length_modifier = String::new();
// Parse flags
while let Some(&ch) = chars.peek() {
if ch == '-' || ch == '+' || ch == ' ' || ch == '#' || ch == '0' {
flags.push(ch);
chars.next();
} else {
break;
}
}
// Parse width
if let Some(&ch) = chars.peek() {
if ch == '*' {
chars.next();
if arg_index < args.len() {
let width_val = evaluate_expr(env, &args[arg_index])?;
if let Value::Number(n) = width_val {
width = Some(n as usize);
}
arg_index += 1;
}
} else if ch.is_ascii_digit() {
let mut w = 0;
while let Some(&ch) = chars.peek() {
if ch.is_ascii_digit() {
w = w * 10 + (ch as u32 - '0' as u32) as usize;
chars.next();
} else {
break;
}
}
width = Some(w);
}
}
// Parse precision
if let Some(&ch) = chars.peek()
&& ch == '.'
{
chars.next();
if let Some(&ch) = chars.peek() {
if ch == '*' {
chars.next();
if arg_index < args.len() {
let prec_val = evaluate_expr(env, &args[arg_index])?;
if let Value::Number(n) = prec_val {
precision = Some(n as usize);
}
arg_index += 1;
}
} else if ch.is_ascii_digit() {
let mut p = 0;
while let Some(&ch) = chars.peek() {
if ch.is_ascii_digit() {
p = p * 10 + (ch as u32 - '0' as u32) as usize;
chars.next();
} else {
break;
}
}
precision = Some(p);
}
}
}
// Parse length modifier
while let Some(&ch) = chars.peek() {
if ch == 'l' || ch == 'L' || ch == 'h' || ch == 'j' || ch == 'z' || ch == 't' {
length_modifier.push(ch);
chars.next();
} else {
break;
}
}
// Parse conversion specifier
if let Some(specifier) = chars.next() {
if arg_index >= args.len() {
return Err(raise_eval_error!("Not enough arguments for sprintf"));
}
// Get the argument value
let arg_val = evaluate_expr(env, &args[arg_index])?;
match specifier {
'd' | 'i' => {
// Integer
let val = match arg_val {
Value::Number(n) => n as i64,
Value::Boolean(b) => {
if b {
1
} else {
0
}
}
_ => 0,
};
let formatted = if let Some(w) = width {
if flags.contains('0') {
format!("{:0>width$}", val, width = w)
} else {
format!("{:>width$}", val, width = w)
}
} else {
val.to_string()
};
result.push_str(&formatted);
}
'x' | 'X' => {
// Hexadecimal
let val = match arg_val {
Value::Number(n) => n as i64,
_ => 0,
};
let formatted = if length_modifier == "l" {
if flags.contains('#') {
format!("0x{:x}", val as u64)
} else {
format!("{:x}", val as u64)
}
} else {
format!("{:x}", val as u32)
};
result.push_str(&formatted);
}
'f' | 'F' | 'e' | 'E' | 'g' | 'G' => {
// Float
let val = match arg_val {
Value::Number(n) => n,
_ => 0.0,
};
let formatted = if let Some(w) = width {
if let Some(p) = precision {
format!("{:>width$.precision$}", val, width = w, precision = p)
} else {
format!("{:>width$}", val, width = w)
}
} else if let Some(p) = precision {
format!("{:.precision$}", val, precision = p)
} else {
val.to_string()
};
result.push_str(&formatted);
}
's' => {
// String
let val = match arg_val {
Value::String(s) => utf16_to_utf8(&s),
Value::Number(n) => n.to_string(),
Value::Boolean(b) => b.to_string(),
_ => "".to_string(),
};
let formatted = if let Some(w) = width {
format!("{:>width$}", val, width = w)
} else {
val
};
result.push_str(&formatted);
}
'c' => {
// Character
let val = match arg_val {
Value::Number(n) => n as u8 as char,
_ => '?',
};
result.push(val);
}
_ => {
// Unknown specifier, just output as is
result.push('%');
result.push(specifier);
}
}
arg_index += 1;
}
} else {
result.push(ch);
}
}
Ok(result)
}