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core/printf: %c substitution type implementation

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This commit is contained in:
luizgfc
2025-08-28 15:24:33 -03:00
parent 078b0aca79
commit 3f7a7d0e39
1 changed files with 41 additions and 1 deletions
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42
core/functions/printf.rs
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@@ -34,7 +34,7 @@ fn get_exponential_formatted_str(number: &f64, uppercase: bool) -> crate::Result
}
}
// TODO: Support %!.3s %x, %X, %o, %c. flags: - + 0 ! ,
// TODO: Support %!.3s %x, %X, %o. flags: - + 0 ! ,
#[inline(always)]
pub fn exec_printf(values: &[Register]) -> crate::Result<Value> {
if values.is_empty() {
@@ -175,6 +175,17 @@ pub fn exec_printf(values: &[Register]) -> crate::Result<Value> {
}
args_index += 1;
}
Some('c') => {
if args_index >= values.len() {
return Err(LimboError::InvalidArgument("not enough arguments".into()));
}
let value = &values[args_index].get_value();
let value_str: String = format!("{value}");
if !value_str.is_empty() {
result.push_str(&value_str[0..1]);
}
args_index += 1;
}
None => {
return Err(LimboError::InvalidArgument(
"incomplete format specifier".into(),
@@ -329,6 +340,35 @@ mod tests {
}
}
#[test]
fn test_printf_character_formatting() {
let test_cases = vec![
// Simple character
(vec![text("character: %c"), text("a")], text("character: a")),
// Character with string
(
vec![text("character: %c"), text("this is a test")],
text("character: t"),
),
// Character with empty
(vec![text("character: %c"), text("")], text("character: ")),
// Character with integer
(
vec![text("character: %c"), integer(123)],
text("character: 1"),
),
// Character with float
(
vec![text("character: %c"), float(42.5)],
text("character: 4"),
),
];
for (input, expected) in test_cases {
assert_eq!(exec_printf(&input).unwrap(), *expected.get_value());
}
}
#[test]
fn test_printf_exponential_formatting() {
let test_cases = vec![