fileio: improve API types

Use size_t instead of uint32_t when specifying file sizes.  Update all
consumers up through the layers to use size_t when required.  These
changes should be safe, but the higher-levels will need to be updated
further to receive the intended benefits (i.e. large file support).

Add error checking for fileio_read and file_write.  Previously, all
errors were being silently ignored, so this change might cause some
problems for some people in some cases.  However, it gives us the chance
to handle any errors that do occur at higher-levels, rather than burying
our heads in the sand.

12 files changed, 66 insertions, 64 deletions

diff --git a/src/flash/ecos.c b/src/flash/ecos.c
index c12ed9d2..b2ffadff 100644
--- a/src/flash/ecos.c
+++ b/src/flash/ecos.c
@@ -152,8 +152,8 @@ FLASH_BANK_COMMAND_HANDLER(ecosflash_flash_bank_command)
 
 static int loadDriver(struct ecosflash_flash_bank *info)
 {
-	uint32_t buf_cnt;
-	uint32_t image_size;
+	size_t buf_cnt;
+	size_t image_size;
 	struct image image;
 
 	image.base_address_set = 0;
@@ -182,7 +182,8 @@ static int loadDriver(struct ecosflash_flash_bank *info)
 		}
 		target_write_buffer(target, image.sections[i].base_address, buf_cnt, buffer);
 		image_size += buf_cnt;
-		LOG_DEBUG("%" PRIu32 " byte written at address 0x%8.8" PRIx32 "", buf_cnt, image.sections[i].base_address);
+		LOG_DEBUG("%zu bytes written at address 0x%8.8" PRIx32 "",
+				buf_cnt, image.sections[i].base_address);
 
 		free(buffer);
 	}
diff --git a/src/flash/flash.c b/src/flash/flash.c
index 03d4547d..adc14119 100644
--- a/src/flash/flash.c
+++ b/src/flash/flash.c
@@ -811,7 +811,6 @@ COMMAND_HANDLER(handle_flash_write_bank_command)
 {
 	uint32_t offset;
 	uint8_t *buffer;
-	uint32_t buf_cnt;
 	struct fileio fileio;
 
 	if (argc != 3)
@@ -833,6 +832,7 @@ COMMAND_HANDLER(handle_flash_write_bank_command)
 	}
 
 	buffer = malloc(fileio.size);
+	size_t buf_cnt;
 	if (fileio_read(&fileio, fileio.size, buffer, &buf_cnt) != ERROR_OK)
 	{
 		free(buffer);
@@ -1059,7 +1059,7 @@ static int flash_write_unlock(struct target *target, struct image *image, uint32
 		/* read sections to the buffer */
 		while (buffer_size < run_size)
 		{
-			uint32_t size_read;
+			size_t size_read;
 
 			size_read = run_size - buffer_size;
 			if (size_read > image->sections[section].size - section_offset)
diff --git a/src/flash/lpc2900.c b/src/flash/lpc2900.c
index b80079df..dc916689 100644
--- a/src/flash/lpc2900.c
+++ b/src/flash/lpc2900.c
@@ -631,7 +631,7 @@ COMMAND_HANDLER(lpc2900_handle_read_custom_command)
 		return ret;
 	}
 
-	uint32_t nwritten;
+	size_t nwritten;
 	ret = fileio_write( &fileio, sizeof(customer),
                         (const uint8_t *)customer, &nwritten );
 	if( ret != ERROR_OK )
@@ -755,7 +755,7 @@ COMMAND_HANDLER(lpc2900_handle_write_custom_command)
 	/* Page 4 */
 	uint32_t offset = ISS_CUSTOMER_START1 % FLASH_PAGE_SIZE;
 	memset( page, 0xff, FLASH_PAGE_SIZE );
-	uint32_t size_read;
+	size_t size_read;
 	retval = image_read_section( &image, 0, 0,
 	                             ISS_CUSTOMER_SIZE1, &page[offset], &size_read);
 	if( retval != ERROR_OK )
diff --git a/src/flash/mflash.c b/src/flash/mflash.c
index 4356f270..06206427 100644
--- a/src/flash/mflash.c
+++ b/src/flash/mflash.c
@@ -705,7 +705,7 @@ static int mg_mflash_write(uint32_t addr, uint8_t *buff, uint32_t len)
 
 COMMAND_HANDLER(mg_write_cmd)
 {
-	uint32_t address, buf_cnt, cnt, res, i;
+	uint32_t address, cnt, res, i;
 	uint8_t *buffer;
 	struct fileio fileio;
 	int ret;
@@ -732,6 +732,7 @@ COMMAND_HANDLER(mg_write_cmd)
 	struct duration bench;
 	duration_start(&bench);
 
+	size_t buf_cnt;
 	for (i = 0; i < cnt; i++) {
 		if ((ret = fileio_read(&fileio, MG_FILEIO_CHUNK, buffer, &buf_cnt)) !=
 				ERROR_OK)
@@ -769,7 +770,7 @@ mg_write_cmd_err:
 
 COMMAND_HANDLER(mg_dump_cmd)
 {
-	uint32_t address, size_written, size, cnt, res, i;
+	uint32_t address, size, cnt, res, i;
 	uint8_t *buffer;
 	struct fileio fileio;
 	int ret;
@@ -797,6 +798,7 @@ COMMAND_HANDLER(mg_dump_cmd)
 	struct duration bench;
 	duration_start(&bench);
 
+	size_t size_written;
 	for (i = 0; i < cnt; i++) {
 		if ((ret = mg_mflash_read(address, buffer, MG_FILEIO_CHUNK)) != ERROR_OK)
 			goto mg_dump_cmd_err;
diff --git a/src/flash/nand.c b/src/flash/nand.c
index 9d997fad..71a67c45 100644
--- a/src/flash/nand.c
+++ b/src/flash/nand.c
@@ -1453,8 +1453,8 @@ static COMMAND_HELPER(nand_fileio_parse_args, struct nand_fileio_state *state,
 static int nand_fileio_read(struct nand_device *nand,
 		struct nand_fileio_state *s)
 {
-	uint32_t total_read = 0;
-	uint32_t one_read;
+	size_t total_read = 0;
+	size_t one_read;
 
 	if (NULL != s->page)
 	{
@@ -1616,7 +1616,7 @@ COMMAND_HANDLER(handle_nand_dump_command)
 
 	while (s.size > 0)
 	{
-		uint32_t size_written;
+		size_t size_written;
 		int retval = nand_read_page(nand, s.address / nand->page_size,
 				s.page, s.page_size, s.oob, s.oob_size);
 		if (ERROR_OK != retval)
diff --git a/src/helper/fileio.c b/src/helper/fileio.c
index 84d46bd5..8f2ce220 100644
--- a/src/helper/fileio.c
+++ b/src/helper/fileio.c
@@ -143,7 +143,7 @@ int fileio_close(struct fileio *fileio)
 	return retval;
 }
 
-int fileio_seek(struct fileio *fileio, uint32_t position)
+int fileio_seek(struct fileio *fileio, size_t position)
 {
 	int retval;
 	if ((retval = fseek(fileio->file, position, SEEK_SET)) != 0)
@@ -155,14 +155,16 @@ int fileio_seek(struct fileio *fileio, uint32_t position)
 	return ERROR_OK;
 }
 
-static inline int fileio_local_read(struct fileio *fileio, uint32_t size, uint8_t *buffer, uint32_t *size_read)
+static int fileio_local_read(struct fileio *fileio,
+		size_t size, void *buffer, size_t *size_read)
 {
-	*size_read = fread(buffer, 1, size, fileio->file);
-
-	return ERROR_OK;
+	ssize_t retval = fread(buffer, 1, size, fileio->file);
+	*size_read = (retval >= 0) ? retval : 0;
+	return (retval < 0) ? retval : ERROR_OK;
 }
 
-int fileio_read(struct fileio *fileio, uint32_t size, uint8_t *buffer, uint32_t *size_read)
+int fileio_read(struct fileio *fileio, size_t size, void *buffer,
+		size_t *size_read)
 {
 	return fileio_local_read(fileio, size, buffer, size_read);
 }
@@ -170,17 +172,17 @@ int fileio_read(struct fileio *fileio, uint32_t size, uint8_t *buffer, uint32_t
 int fileio_read_u32(struct fileio *fileio, uint32_t *data)
 {
 	uint8_t buf[4];
-	uint32_t size_read;
-	int retval;
-
-	if ((retval = fileio_local_read(fileio, 4, buf, &size_read)) != ERROR_OK)
-		return retval;
-	*data = be_to_h_u32(buf);
-
-	return ERROR_OK;
+	size_t size_read;
+	int retval = fileio_local_read(fileio, sizeof(uint32_t), buf, &size_read);
+	if (ERROR_OK == retval && sizeof(uint32_t) != size_read)
+		retval = -EIO;
+	if (ERROR_OK == retval)
+		*data = be_to_h_u32(buf);
+	return retval;
 }
 
-static inline int fileio_local_fgets(struct fileio *fileio, uint32_t size, char *buffer)
+static int fileio_local_fgets(struct fileio *fileio,
+		size_t size, void *buffer)
 {
 	if (fgets(buffer, size, fileio->file) == NULL)
 		return ERROR_FILEIO_OPERATION_FAILED;
@@ -188,40 +190,37 @@ static inline int fileio_local_fgets(struct fileio *fileio, uint32_t size, char
 	return ERROR_OK;
 }
 
-int fileio_fgets(struct fileio *fileio, uint32_t size, char *buffer)
+int fileio_fgets(struct fileio *fileio, size_t size, void *buffer)
 {
 	return fileio_local_fgets(fileio, size, buffer);
 }
 
-static inline int fileio_local_write(struct fileio *fileio, uint32_t size, const uint8_t *buffer, uint32_t *size_written)
+static int fileio_local_write(struct fileio *fileio,
+		size_t size, const void *buffer, size_t *size_written)
 {
-	*size_written = fwrite(buffer, 1, size, fileio->file);
-
-	return ERROR_OK;
+	ssize_t retval = fwrite(buffer, 1, size, fileio->file);
+	*size_written = (retval >= 0) ? retval : 0;
+	return (retval < 0) ? retval : ERROR_OK;
 }
 
-int fileio_write(struct fileio *fileio, uint32_t size, const uint8_t *buffer, uint32_t *size_written)
+int fileio_write(struct fileio *fileio,
+		size_t size, const void *buffer, size_t *size_written)
 {
-	int retval;
-
-	retval = fileio_local_write(fileio, size, buffer, size_written);
-
+	int retval = fileio_local_write(fileio, size, buffer, size_written);
 	if (retval == ERROR_OK)
 		fileio->size += *size_written;
-
-	return retval;;
+	return retval;
 }
 
 int fileio_write_u32(struct fileio *fileio, uint32_t data)
 {
 	uint8_t buf[4];
-	uint32_t size_written;
-	int retval;
-
 	h_u32_to_be(buf, data);
 
-	if ((retval = fileio_local_write(fileio, 4, buf, &size_written)) != ERROR_OK)
-		return retval;
+	size_t size_written;
+	int retval = fileio_write(fileio, 4, buf, &size_written);
+	if (ERROR_OK == retval && size_written != sizeof(uint32_t))
+		retval = -EIO;
 
-	return ERROR_OK;
+	return retval;
 }
diff --git a/src/helper/fileio.h b/src/helper/fileio.h
index 6ed6fe45..325b441f 100644
--- a/src/helper/fileio.h
+++ b/src/helper/fileio.h
@@ -58,13 +58,13 @@ int fileio_open(struct fileio *fileio,
 	const char *url, enum fileio_access access, enum fileio_type type);
 int fileio_close(struct fileio *fileio);
 
-int fileio_seek(struct fileio *fileio, uint32_t position);
-int fileio_fgets(struct fileio *fileio, uint32_t size, char *buffer);
+int fileio_seek(struct fileio *fileio, size_t position);
+int fileio_fgets(struct fileio *fileio, size_t size, void *buffer);
 
 int fileio_read(struct fileio *fileio,
-		uint32_t size, uint8_t *buffer, uint32_t *size_read);
+		size_t size, void *buffer, size_t *size_read);
 int fileio_write(struct fileio *fileio,
-		uint32_t size, const uint8_t *buffer, uint32_t *size_written);
+		size_t size, const void *buffer, size_t *size_written);
 
 int fileio_read_u32(struct fileio *fileio, uint32_t *data);
 int fileio_write_u32(struct fileio *fileio, uint32_t data);
diff --git a/src/target/etm.c b/src/target/etm.c
index 5a0ffed5..fa7a71b2 100644
--- a/src/target/etm.c
+++ b/src/target/etm.c
@@ -640,7 +640,7 @@ static int etm_read_instruction(struct etm_context *ctx, struct arm_instruction
 {
 	int i;
 	int section = -1;
-	uint32_t size_read;
+	size_t size_read;
 	uint32_t opcode;
 	int retval;
 
diff --git a/src/target/image.c b/src/target/image.c
index bba4675f..8774c251 100644
--- a/src/target/image.c
+++ b/src/target/image.c
@@ -48,7 +48,7 @@ static int autodetect_image_type(struct image *image, const char *url)
 {
 	int retval;
 	struct fileio fileio;
-	uint32_t read_bytes;
+	size_t read_bytes;
 	uint8_t buffer[9];
 
 	/* read the first 4 bytes of image */
@@ -175,7 +175,7 @@ static int image_ihex_buffer_complete(struct image *image)
 		uint32_t record_type;
 		uint32_t checksum;
 		uint8_t cal_checksum = 0;
-		uint32_t bytes_read = 0;
+		size_t bytes_read = 0;
 
 		if (sscanf(&lpszLine[bytes_read], ":%2" SCNx32 "%4" SCNx32 "%2" SCNx32 , &count, &address, &record_type) != 3)
 		{
@@ -360,7 +360,7 @@ static int image_ihex_buffer_complete(struct image *image)
 static int image_elf_read_headers(struct image *image)
 {
 	struct image_elf *elf = image->type_private;
-	uint32_t read_bytes;
+	size_t read_bytes;
 	uint32_t i,j;
 	int retval;
 
@@ -458,11 +458,11 @@ static int image_elf_read_headers(struct image *image)
 	return ERROR_OK;
 }
 
-static int image_elf_read_section(struct image *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, uint32_t *size_read)
+static int image_elf_read_section(struct image *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, size_t *size_read)
 {
 	struct image_elf *elf = image->type_private;
 	Elf32_Phdr *segment = (Elf32_Phdr *)image->sections[section].private;
-	uint32_t read_size,really_read;
+	size_t read_size,really_read;
 	int retval;
 
 	*size_read = 0;
@@ -474,7 +474,7 @@ static int image_elf_read_section(struct image *image, int section, uint32_t off
 	{
 		/* maximal size present in file for the current segment */
 		read_size = MIN(size, field32(elf,segment->p_filesz)-offset);
-		LOG_DEBUG("read elf: size = 0x%" PRIx32 " at 0x%" PRIx32 "",read_size,
+		LOG_DEBUG("read elf: size = 0x%zu at 0x%" PRIx32 "", read_size,
 			field32(elf,segment->p_offset) + offset);
 		/* read initialized area of the segment */
 		if ((retval = fileio_seek(&elf->fileio, field32(elf,segment->p_offset) + offset)) != ERROR_OK)
@@ -797,7 +797,7 @@ int image_open(struct image *image, const char *url, const char *type_string)
 	return retval;
 };
 
-int image_read_section(struct image *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, uint32_t *size_read)
+int image_read_section(struct image *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, size_t *size_read)
 {
 	int retval;
 
diff --git a/src/target/image.h b/src/target/image.h
index 06d47bf8..0dac5bae 100644
--- a/src/target/image.h
+++ b/src/target/image.h
@@ -102,7 +102,7 @@ struct image_mot
 
 int image_open(struct image *image, const char *url, const char *type_string);
 int image_read_section(struct image *image, int section, uint32_t offset,
-		uint32_t size, uint8_t *buffer, uint32_t *size_read);
+		uint32_t size, uint8_t *buffer, size_t *size_read);
 void image_close(struct image *image);
 
 int image_add_section(struct image *image, uint32_t base, uint32_t size,
diff --git a/src/target/target.c b/src/target/target.c
index f141e933..c00c2ed9 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -2399,7 +2399,7 @@ static COMMAND_HELPER(parse_load_image_command_args, struct image *image,
 COMMAND_HANDLER(handle_load_image_command)
 {
 	uint8_t *buffer;
-	uint32_t buf_cnt;
+	size_t buf_cnt;
 	uint32_t image_size;
 	uint32_t min_address = 0;
 	uint32_t max_address = 0xffffffff;
@@ -2519,7 +2519,7 @@ COMMAND_HANDLER(handle_dump_image_command)
 	int retval = ERROR_OK;
 	while (size > 0)
 	{
-		uint32_t size_written;
+		size_t size_written;
 		uint32_t this_run_size = (size > 560) ? 560 : size;
 		retval = target_read_buffer(target, address, this_run_size, buffer);
 		if (retval != ERROR_OK)
@@ -2553,7 +2553,7 @@ COMMAND_HANDLER(handle_dump_image_command)
 static COMMAND_HELPER(handle_verify_image_command_internal, int verify)
 {
 	uint8_t *buffer;
-	uint32_t buf_cnt;
+	size_t buf_cnt;
 	uint32_t image_size;
 	int i;
 	int retval;
@@ -2674,7 +2674,7 @@ static COMMAND_HELPER(handle_verify_image_command_internal, int verify)
 			}
 		} else
 		{
-			command_print(cmd_ctx, "address 0x%08" PRIx32 " length 0x%08" PRIx32 "",
+			command_print(cmd_ctx, "address 0x%08" PRIx32 " length 0x%08zx",
 						  image.sections[i].base_address,
 						  buf_cnt);
 		}
@@ -4537,7 +4537,7 @@ static void free_fastload(void)
 COMMAND_HANDLER(handle_fast_load_image_command)
 {
 	uint8_t *buffer;
-	uint32_t buf_cnt;
+	size_t buf_cnt;
 	uint32_t image_size;
 	uint32_t min_address = 0;
 	uint32_t max_address = 0xffffffff;
diff --git a/src/target/xscale.c b/src/target/xscale.c
index 30ca3bf3..9e93c020 100644
--- a/src/target/xscale.c
+++ b/src/target/xscale.c
@@ -2557,7 +2557,7 @@ static int xscale_read_instruction(struct target *target,
 	struct xscale_common *xscale = target_to_xscale(target);
 	int i;
 	int section = -1;
-	uint32_t size_read;
+	size_t size_read;
 	uint32_t opcode;
 	int retval;