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fw_cfg: Use g_file_get_contents instead of multiple fread() calls

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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Pavel Borzenkov 2011-10-24 07:31:30 -04:00 committed by Anthony Liguori
parent bdb7ca67de
commit 9477c87ed9
1 changed files with 38 additions and 64 deletions
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102
hw/fw_cfg.c
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@ -60,71 +60,55 @@ struct FWCfgState {
#define JPG_FILE 0
#define BMP_FILE 1
static FILE *probe_splashfile(char *filename, int *file_sizep, int *file_typep)
static char *read_splashfile(char *filename, int *file_sizep, int *file_typep)
{
FILE *fp = NULL;
int fop_ret;
int file_size;
GError *err = NULL;
gboolean res;
gchar *content;
int file_type = -1;
unsigned char buf[2] = {0, 0};
unsigned int filehead_value = 0;
unsigned int filehead = 0;
int bmp_bpp;
fp = fopen(filename, "rb");
if (fp == NULL) {
error_report("failed to open file '%s'.", filename);
return fp;
res = g_file_get_contents(filename, &content, (gsize *)file_sizep, &err);
if (res == FALSE) {
error_report("failed to read splash file '%s'", filename);
g_error_free(err);
return NULL;
}
/* check file size */
fseek(fp, 0L, SEEK_END);
file_size = ftell(fp);
if (file_size < 2) {
error_report("file size is less than 2 bytes '%s'.", filename);
fclose(fp);
fp = NULL;
return fp;
if (*file_sizep < 30) {
goto error;
}
/* check magic ID */
fseek(fp, 0L, SEEK_SET);
fop_ret = fread(buf, 1, 2, fp);
if (fop_ret != 2) {
error_report("Could not read header from '%s': %s",
filename, strerror(errno));
fclose(fp);
fp = NULL;
return fp;
}
filehead_value = (buf[0] + (buf[1] << 8)) & 0xffff;
if (filehead_value == 0xd8ff) {
filehead = ((content[0] & 0xff) + (content[1] << 8)) & 0xffff;
if (filehead == 0xd8ff) {
file_type = JPG_FILE;
} else if (filehead == 0x4d42) {
file_type = BMP_FILE;
} else {
if (filehead_value == 0x4d42) {
file_type = BMP_FILE;
}
}
if (file_type < 0) {
error_report("'%s' not jpg/bmp file,head:0x%x.",
filename, filehead_value);
fclose(fp);
fp = NULL;
return fp;
goto error;
}
/* check BMP bpp */
if (file_type == BMP_FILE) {
fseek(fp, 28, SEEK_SET);
fop_ret = fread(buf, 1, 2, fp);
bmp_bpp = (buf[0] + (buf[1] << 8)) & 0xffff;
bmp_bpp = (content[28] + (content[29] << 8)) & 0xffff;
if (bmp_bpp != 24) {
error_report("only 24bpp bmp file is supported.");
fclose(fp);
fp = NULL;
return fp;
goto error;
}
}
/* return values */
*file_sizep = file_size;
*file_typep = file_type;
return fp;
return content;
error:
error_report("splash file '%s' format not recognized; must be JPEG "
"or 24 bit BMP", filename);
g_free(content);
return NULL;
}
static void fw_cfg_bootsplash(FWCfgState *s)
@ -132,9 +116,7 @@ static void fw_cfg_bootsplash(FWCfgState *s)
int boot_splash_time = -1;
const char *boot_splash_filename = NULL;
char *p;
char *filename;
FILE *fp;
int fop_ret;
char *filename, *file_data;
int file_size;
int file_type = -1;
const char *temp;
@ -174,27 +156,19 @@ static void fw_cfg_bootsplash(FWCfgState *s)
error_report("failed to find file '%s'.", boot_splash_filename);
return;
}
/* probing the file */
fp = probe_splashfile(filename, &file_size, &file_type);
if (fp == NULL) {
/* loading file data */
file_data = read_splashfile(filename, &file_size, &file_type);
if (file_data == NULL) {
g_free(filename);
return;
}
/* loading file data */
if (boot_splash_filedata != NULL) {
g_free(boot_splash_filedata);
}
boot_splash_filedata = g_malloc(file_size);
boot_splash_filedata = (uint8_t *)file_data;
boot_splash_filedata_size = file_size;
fseek(fp, 0L, SEEK_SET);
fop_ret = fread(boot_splash_filedata, 1, file_size, fp);
if (fop_ret != file_size) {
error_report("failed to read data from '%s'.",
boot_splash_filename);
fclose(fp);
return;
}
fclose(fp);
/* insert data */
if (file_type == JPG_FILE) {
fw_cfg_add_file(s, "bootsplash.jpg",