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scanner: Fail more gracefully on out-of-memory

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Failing with an error message and error code is little nicer.  I doubt we'll
hit this case much, but it makes the static analysis happy.
This commit is contained in:
Kristian Høgsberg 2013-07-13 00:35:21 -04:00
parent 43f7268989
commit 8bd93c5c9d
1 changed files with 41 additions and 18 deletions
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59
src/scanner.c
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@ -127,13 +127,36 @@ struct parse_context {
unsigned int character_data_length;
};
static void *
fail_on_null(void *p)
{
if (p == NULL) {
fprintf(stderr, "wayland-scanner: out of memory\n");
exit(EXIT_FAILURE);
}
return p;
}
static void *
xmalloc(size_t s)
{
return fail_on_null(malloc(s));
}
static char *
xstrdup(const char *s)
{
return fail_on_null(strdup(s));
}
static char *
uppercase_dup(const char *src)
{
char *u;
int i;
u = strdup(src);
u = xstrdup(src);
for (i = 0; u[i]; i++)
u[i] = toupper(u[i]);
u[i] = '\0';
@ -292,7 +315,7 @@ start_element(void *data, const char *element_name, const char **atts)
if (name == NULL)
fail(ctx, "no protocol name given");
ctx->protocol->name = strdup(name);
ctx->protocol->name = xstrdup(name);
ctx->protocol->uppercase_name = uppercase_dup(name);
ctx->protocol->description = NULL;
} else if (strcmp(element_name, "copyright") == 0) {
@ -304,8 +327,8 @@ start_element(void *data, const char *element_name, const char **atts)
if (version == 0)
fail(ctx, "no interface version given");
interface = malloc(sizeof *interface);
interface->name = strdup(name);
interface = xmalloc(sizeof *interface);
interface->name = xstrdup(name);
interface->uppercase_name = uppercase_dup(name);
interface->version = version;
interface->description = NULL;
@ -321,8 +344,8 @@ start_element(void *data, const char *element_name, const char **atts)
if (name == NULL)
fail(ctx, "no request name given");
message = malloc(sizeof *message);
message->name = strdup(name);
message = xmalloc(sizeof *message);
message->name = xstrdup(name);
message->uppercase_name = uppercase_dup(name);
wl_list_init(&message->arg_list);
message->arg_count = 0;
@ -359,8 +382,8 @@ start_element(void *data, const char *element_name, const char **atts)
if (name == NULL)
fail(ctx, "no argument name given");
arg = malloc(sizeof *arg);
arg->name = strdup(name);
arg = xmalloc(sizeof *arg);
arg->name = xstrdup(name);
if (strcmp(type, "int") == 0)
arg->type = INT;
@ -386,7 +409,7 @@ start_element(void *data, const char *element_name, const char **atts)
case NEW_ID:
case OBJECT:
if (interface_name)
arg->interface_name = strdup(interface_name);
arg->interface_name = xstrdup(interface_name);
else
arg->interface_name = NULL;
break;
@ -408,7 +431,7 @@ start_element(void *data, const char *element_name, const char **atts)
arg->summary = NULL;
if (summary)
arg->summary = strdup(summary);
arg->summary = xstrdup(summary);
wl_list_insert(ctx->message->arg_list.prev, &arg->link);
ctx->message->arg_count++;
@ -416,8 +439,8 @@ start_element(void *data, const char *element_name, const char **atts)
if (name == NULL)
fail(ctx, "no enum name given");
enumeration = malloc(sizeof *enumeration);
enumeration->name = strdup(name);
enumeration = xmalloc(sizeof *enumeration);
enumeration->name = xstrdup(name);
enumeration->uppercase_name = uppercase_dup(name);
enumeration->description = NULL;
wl_list_init(&enumeration->entry_list);
@ -430,12 +453,12 @@ start_element(void *data, const char *element_name, const char **atts)
if (name == NULL)
fail(ctx, "no entry name given");
entry = malloc(sizeof *entry);
entry->name = strdup(name);
entry = xmalloc(sizeof *entry);
entry->name = xstrdup(name);
entry->uppercase_name = uppercase_dup(name);
entry->value = strdup(value);
entry->value = xstrdup(value);
if (summary)
entry->summary = strdup(summary);
entry->summary = xstrdup(summary);
else
entry->summary = NULL;
wl_list_insert(ctx->enumeration->entry_list.prev,
@ -444,8 +467,8 @@ start_element(void *data, const char *element_name, const char **atts)
if (summary == NULL)
fail(ctx, "description without summary");
description = malloc(sizeof *description);
description->summary = strdup(summary);
description = xmalloc(sizeof *description);
description->summary = xstrdup(summary);
if (ctx->message)
ctx->message->description = description;