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dm: Fix some issues from string operations

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The patch fix some string operations issues and also improve readability
of several snippet.

Tracked-On: #2133
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Reviewed-by: Yonghua Huang <yonghua.huang@intel.com>
This commit is contained in:
Shuo A Liu
2018-12-20 11:00:31 +08:00
committed by wenlingz
parent 20d0e666ff
commit 3e0b06cfd6
7 changed files with 62 additions and 84 deletions
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89
devicemodel/hw/pci/core.c
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@@ -35,6 +35,7 @@
#include <assert.h>
#include <stdbool.h>
#include "dm.h"
#include "vmmapi.h"
#include "acpi.h"
#include "inout.h"
@@ -155,41 +156,34 @@ pci_parse_slot_usage(char *aopt)
int
parse_bdf(char *s, int *bus, int *dev, int *func, int base)
{
int i;
int nums[3] = {-1, -1, -1};
char *str;
char *s_bus, *s_dev, *s_func;
char *str, *cp;
int ret = 0;
if (bus) *bus = 0;
if (dev) *dev = 0;
if (func) *func = 0;
str = s;
for (i = 0, errno = 0; i < 3; i++) {
nums[i] = (int)strtol(str, &str, base);
if (errno == ERANGE || *str == '\0' || s == str)
break;
str++;
str = cp = strdup(s);
bus ? *bus = 0 : 0;
dev ? *dev = 0 : 0;
func ? *func = 0 : 0;
s_bus = s_dev = s_func = NULL;
s_dev = strsep(&cp, ":/.");
if (cp) {
s_func = strsep(&cp, ":/.");
if (cp) {
s_bus = s_dev;
s_dev = s_func;
s_func = strsep(&cp, ":/.");
}
}
if (s == str || errno == ERANGE)
{
printf("%s: parse_bdf error!\n", __func__);
return -1;
}
switch (i) {
case 0:
if (dev) *dev = nums[0];
break;
case 1:
if (dev) *dev = nums[0];
if (func) *func = nums[1];
break;
case 2:
if (bus) *bus = nums[0];
if (dev) *dev = nums[1];
if (func) *func = nums[2];
break;
}
return 0;
if (s_dev && dev)
ret |= dm_strtoi(s_dev, &s_dev, base, dev);
if (s_func && func)
ret |= dm_strtoi(s_func, &s_func, base, func);
if (s_bus && bus)
ret |= dm_strtoi(s_bus, &s_bus, base, bus);
free(str);
return ret;
}
int
@@ -208,35 +202,22 @@ pci_parse_slot(char *opt)
}
emul = config = NULL;
cp = strchr(str, ',');
if (cp != NULL) {
*cp = '\0';
emul = cp + 1;
cp = strchr(emul, ',');
if (cp != NULL) {
*cp = '\0';
config = cp + 1;
if (*config == 'b') {
b = config;
cp = config + 1;
if (*cp == ',') {
*cp = '\0';
config = cp + 1;
} else {
b = NULL;
}
}
}
cp = str;
str = strsep(&cp, ",");
if (cp) {
emul = strsep(&cp, ",");
/* for boot device */
if (cp && *cp == 'b' && *(cp+1) == ',')
b = strsep(&cp, ",");
config = cp;
} else {
pci_parse_slot_usage(opt);
goto done;
}
/* <bus>:<slot>:<func> */
if (parse_bdf(str, &bnum, &snum, &fnum, 10) != 0) {
fprintf(stderr, "pci bdf parse fail\n");
if (parse_bdf(str, &bnum, &snum, &fnum, 10) != 0)
snum = -1;
}
if (bnum < 0 || bnum >= MAXBUSES || snum < 0 || snum >= MAXSLOTS ||
fnum < 0 || fnum >= MAXFUNCS) {