scripts/dtc/data.c

Source file repositories/reference/linux-study-clean/scripts/dtc/data.c

File Facts

System
Linux kernel
Corpus path
scripts/dtc/data.c
Extension
.c
Size
5340 bytes
Lines
294
Domain
Support Tooling And Documentation
Bucket
scripts
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
 */

#include "dtc.h"

void data_free(struct data d)
{
	struct marker *m, *nm;

	m = d.markers;
	while (m) {
		nm = m->next;
		free(m->ref);
		free(m);
		m = nm;
	}

	if (d.val)
		free(d.val);
}

struct data data_grow_for(struct data d, unsigned int xlen)
{
	struct data nd;
	unsigned int newsize;

	if (xlen == 0)
		return d;

	nd = d;

	newsize = xlen;

	while ((d.len + xlen) > newsize)
		newsize *= 2;

	nd.val = xrealloc(d.val, newsize);

	return nd;
}

struct data data_copy_mem(const char *mem, int len)
{
	struct data d;

	d = data_grow_for(empty_data, len);

	d.len = len;
	memcpy(d.val, mem, len);

	return d;
}

struct data data_copy_escape_string(const char *s, int len)
{
	int i = 0;
	struct data d;
	char *q;

	d = data_add_marker(empty_data, TYPE_STRING, NULL);
	d = data_grow_for(d, len + 1);

	q = d.val;
	while (i < len) {
		char c = s[i++];

		if (c == '\\')
			c = get_escape_char(s, &i);

		q[d.len++] = c;
	}

	q[d.len++] = '\0';
	return d;
}

struct data data_copy_file(FILE *f, size_t maxlen)
{
	struct data d = empty_data;

	d = data_add_marker(d, TYPE_NONE, NULL);
	while (!feof(f) && (d.len < maxlen)) {
		size_t chunksize, ret;

		if (maxlen == (size_t)-1)
			chunksize = 4096;
		else
			chunksize = maxlen - d.len;

Annotation

Implementation Notes