read_file.c File Reference

Implements the OP_READ_FILE opcode for reading file contents in the VM. More...

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Functions
	if (path.type !=VAL_STRING)
	if (!f)
	if (fseek(f, 0, SEEK_END) !=0)
	if (sz< 0)
	rewind (f)
	fclose (f)
	free (buf)
	free_value (path)
	push_value (vm, out)

Variables
case	OP_READ_FILE
const char *	p = path.s ? path.s : ""
FILE *	f = fopen(p, "rb")
long	sz = ftell(f)
char *	buf = (char *)malloc((size_t)sz + 1)
size_t	n = buf ? fread(buf, 1, (size_t)sz, f) : 0
Value	out = make_string(buf)
	break

Detailed Description

Implements the OP_READ_FILE opcode for reading file contents in the VM.

This file handles the OP_READ_FILE instruction, which reads the contents of a file and pushes the result as a string onto the stack.

Behavior:

• Pops the file path from the stack.
• Reads the file contents.
• Pushes the contents as a string onto the stack.

Error Handling:

• Exits with an error if the file path is invalid or the file cannot be read.

Example: // Bytecode: OP_READ_FILE // Stack before: ["file.txt"] // Stack after: ["file contents"]

Definition in file read_file.c.

Function Documentation

fclose()

fclose

(

f

)

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free()

free

(

buf

)

free_value()

free_value

(

path

)

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if() [1/4]

if

(

!

f

)

Definition at line 39 of file read_file.c.

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if() [2/4]

if

(

fseek(f, 0, SEEK_END) !

= 0

)

Definition at line 44 of file read_file.c.

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if() [3/4]

if

(

path.type !

= VAL_STRING

)

Definition at line 33 of file read_file.c.

if() [4/4]

if

(

)

Definition at line 51 of file read_file.c.

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push_value()

push_value	(	vm	,
		out	)

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rewind()

rewind

(

f

)

Variable Documentation

break

break

Definition at line 71 of file read_file.c.

buf

buf[n] = (char *)malloc((size_t)sz + 1)

Definition at line 58 of file read_file.c.

f

FILE* f = fopen(p, "rb")

Definition at line 38 of file read_file.c.

n

size_t n = buf ? fread(buf, 1, (size_t)sz, f) : 0

Definition at line 59 of file read_file.c.

OP_READ_FILE

case OP_READ_FILE

Definition at line 31 of file read_file.c.

out

Value out = make_string(buf)

Definition at line 67 of file read_file.c.

p

const char* p = path.s ? path.s : ""

Definition at line 37 of file read_file.c.

sz

long sz = ftell(f)

Definition at line 50 of file read_file.c.