regex_match.c File Reference

VM opcode snippet for OP_REGEX_MATCH (POSIX full-match). More...

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Functions
	if (str.type !=VAL_STRING||pattern.type !=VAL_STRING)
	free_value (pattern)
	free_value (str)
	push_value (vm, make_int(truth))

Variables
case	OP_REGEX_MATCH
Value	str = pop_value(vm)
int	truth = 0
	break

Detailed Description

VM opcode snippet for OP_REGEX_MATCH (POSIX full-match).

This opcode checks whether a regular expression pattern matches the entire input string. It uses POSIX regex APIs on UNIX platforms and provides a graceful fallback elsewhere.

Behavior (stack effects):

• Pops: pattern (string), input (string)
• Pushes: result (int) — 1 if the pattern matches the whole input string, 0 otherwise. On invalid regex, returns 0.

Platform notes:

• On non-UNIX platforms (no POSIX regex available), this opcode returns 0 without error.

Errors:

• If operands are not strings, the VM prints a runtime type error and exits.

Example:

• pattern = "[a-z]+", input = "hello" -> 1
• pattern = "[a-z]+", input = "hello!" -> 0 (not a full match)

Definition in file regex_match.c.

Function Documentation

free_value() [1/2]

free_value

(

pattern

)

free_value() [2/2]

free_value

(

str

)

if()

if

(

str.type !

= VAL_STRING || pattern.type != VAL_STRING

)

Definition at line 42 of file regex_match.c.

push_value()

push_value	(	vm	,
		make_int(truth)	)

Variable Documentation

break

break

Definition at line 52 of file regex_match.c.

OP_REGEX_MATCH

case OP_REGEX_MATCH

Definition at line 39 of file regex_match.c.

str

Value str = pop_value(vm)

Definition at line 41 of file regex_match.c.

truth

int truth = 0

Definition at line 49 of file regex_match.c.