cbfstool: Add buffer management API.
Many functions in cbfstool need to deal with a memory buffer - both location and
size. Right now it's made by different ways: for ROM image using global variable
(romsize, master_header); and in cbfs-* using return value for size and char**
to return memory location.
This may cause bugs like assuming incorrect return types, ex:
uint32_t file_size = parse(); // which returns "-1" on error
if (file_size <= 0) { ...
And the parse error will never be caught.
We can simplify this by introducing a buffer API, to change
unsigned int do_something(char *input, size_t len, char **output, ...)
into
int do_something(struct buffer *input, struct buffer *output, ...)
The buffer API will be used by further commits.
Change-Id: Iaddaeb109f08be6be84c6728d72c6a043b0e7a9f
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: http://review.coreboot.org/2205
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c
index d4560f6..aa98696 100644
--- a/util/cbfstool/common.c
+++ b/util/cbfstool/common.c
@@ -40,6 +40,69 @@
return 0;
}
+/* Buffer and file I/O */
+
+int buffer_create(struct buffer *buffer, size_t size, const char *name) {
+ buffer->name = strdup(name);
+ buffer->size = size;
+ buffer->data = (char *)malloc(buffer->size);
+ if (!buffer->data) {
+ fprintf(stderr, "buffer_create: Insufficient memory (0x%zx).\n",
+ size);
+ }
+ return (buffer->data == NULL);
+}
+
+int buffer_from_file(struct buffer *buffer, const char *filename) {
+ FILE *fp = fopen(filename, "rb");
+ if (!fp) {
+ perror(filename);
+ return -1;
+ }
+ fseek(fp, 0, SEEK_END);
+ buffer->size = ftell(fp);
+ buffer->name = strdup(filename);
+ rewind(fp);
+ buffer->data = (char *)malloc(buffer->size);
+ assert(buffer->data);
+ if (fread(buffer->data, 1, buffer->size, fp) != buffer->size) {
+ fprintf(stderr, "incomplete read: %s\n", filename);
+ fclose(fp);
+ return -1;
+ }
+ fclose(fp);
+ return 0;
+}
+
+int buffer_write_file(struct buffer *buffer, const char *filename) {
+ FILE *fp = fopen(filename, "wb");
+ if (!fp) {
+ perror(filename);
+ return -1;
+ }
+ assert(buffer && buffer->data);
+ if (fwrite(buffer->data, 1, buffer->size, fp) != buffer->size) {
+ fprintf(stderr, "incomplete write: %s\n", filename);
+ fclose(fp);
+ return -1;
+ }
+ fclose(fp);
+ return 0;
+}
+
+void buffer_delete(struct buffer *buffer) {
+ assert(buffer);
+ if (buffer->name) {
+ free(buffer->name);
+ buffer->name = NULL;
+ }
+ if (buffer->data) {
+ free(buffer->data);
+ buffer->data = NULL;
+ }
+ buffer->size = 0;
+}
+
size_t getfilesize(const char *filename)
{
size_t size;