VM opcode snippet for parsing a JSON string into a Fun Value. More...

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Functions
	free_value (text)
	if (!s)
	json_tokener_free (tok)
	free (s)
	if (jerr !=json_tokener_success)
	push_value (vm, v)
	json_object_put (root)

Variables
case	OP_JSON_PARSE
char *	s = value_to_string_alloc(&text)
struct json_tokener *	tok = json_tokener_new()
json_object *	root = json_tokener_parse_ex(tok, s, (int)strlen(s))
enum json_tokener_error	jerr = json_tokener_get_error(tok)
	else
	break

Detailed Description

VM opcode snippet for parsing a JSON string into a Fun Value.

Implements the OP_JSON_PARSE instruction. Expects a string (or any value convertible to string) on the stack, parses it with json-c, converts the resulting json_object to a Fun Value and pushes it.

Build gating: compiled only when FUN_WITH_JSON is enabled. Otherwise the opcode consumes its argument and pushes Nil.

Stack effect (with FUN_WITH_JSON):

Pops: text (any; converted to string)
Pushes: Value converted from JSON, or Nil on error

Errors and edge cases:

If allocation fails, tokenization fails, or the text is not valid JSON, the opcode pushes Nil.
The temporary json-c objects are released after conversion; ownership of the pushed Fun Value follows normal VM semantics.

Definition in file parse.c.

Function Documentation

◆ free()

free ( s )

◆ free_value()

free_value ( text )

◆ if() [1/2]

if ( ! s )

Definition at line 38 of file parse.c.

◆ if() [2/2]

if ( jerr ! = json_tokener_success )

Definition at line 47 of file parse.c.

◆ json_object_put()

json_object_put ( root )

◆ json_tokener_free()

json_tokener_free ( tok )

◆ push_value()

push_value	(	vm	,
		v	)

Variable Documentation

◆ break

break

Definition at line 60 of file parse.c.

◆ else

else

Initial value:

{

Value v = json_to_fun(root)

v

Value v

Definition cast.c:22

root

json_object * root

Definition from_file.c:44

json_to_fun

static Value json_to_fun(json_object *j)

Convert a json-c object into a Fun Value.

Definition json.c:46

Value

Tagged union representing a Fun value.

Definition value.h:68

Definition at line 49 of file parse.c.

◆ jerr

enum json_tokener_error jerr = json_tokener_get_error(tok)

Definition at line 44 of file parse.c.

◆ OP_JSON_PARSE

case OP_JSON_PARSE

Definition at line 33 of file parse.c.

◆ root

json_object* root = json_tokener_parse_ex(tok, s, (int)strlen(s))

Definition at line 43 of file parse.c.

◆ s

char* s = value_to_string_alloc(&text)

Definition at line 36 of file parse.c.

◆ tok

struct json_tokener* tok = json_tokener_new()

Definition at line 42 of file parse.c.

Functions

Variables