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Introduce helper function empty_string()

Browse source 
There are ca. 50 constructs of the kind
  same_string(s, "")
to test for empty or null strings. Replace them by the new helper
function empty_string().

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-01-07 11:12:48 +01:00 • committed by Lubomir I. Ivanov
parent 86ef9fce75
commit e85ecdd925
21 changed files with 53 additions and 48 deletions
Download patch file Download diff file Expand all files Collapse all files

10
core/dive.c
View file

@ -1190,7 +1190,7 @@ static struct event *find_previous_event(struct divecomputer *dc, struct event *
struct event *ev = dc->events;
struct event *previous = NULL;
if (same_string(event->name, ""))
if (empty_string(event->name))
return NULL;
while (ev && ev != event) {
if (same_string(ev->name, event->name))
@ -2954,7 +2954,7 @@ void taglist_cleanup(struct tag_entry **tag_list)
struct tag_entry **tl = tag_list;
while (*tl) {
/* skip tags that are empty or that we have seen before */
if (same_string((*tl)->tag->name, "") || tag_seen_before(*tag_list, *tl)) {
if (empty_string((*tl)->tag->name) || tag_seen_before(*tag_list, *tl)) {
*tl = (*tl)->next;
continue;
}
@ -3128,7 +3128,7 @@ int count_dives_with_tag(const char *tag)
struct dive *d;
for_each_dive (i, d) {
if (same_string(tag, "")) {
if (empty_string(tag)) {
// count dives with no tags
if (d->tag_list == NULL)
counter++;
@ -3148,9 +3148,9 @@ int count_dives_with_person(const char *person)
struct dive *d;
for_each_dive (i, d) {
if (same_string(person, "")) {
if (empty_string(person)) {
// solo dive
if (same_string(d->buddy, "") && same_string(d->divemaster, ""))
if (empty_string(d->buddy) && empty_string(d->divemaster))
counter++;
} else if (string_sequence_contains(d->buddy, person) || string_sequence_contains(d->divemaster, person)) {
counter++;

5
core/dive.h
View file

@ -38,6 +38,11 @@ static inline bool same_string_caseinsensitive(const char *a, const char *b)
return !strcasecmp(a ?: "", b ?: "");
}
static inline bool empty_string(const char *s)
{
return !s || !*s;
}
static inline bool includes_string_caseinsensitive(const char *haystack, const char *needle)
{
if (!needle)

4
core/divelist.c
View file

@ -1177,11 +1177,11 @@ void filter_dive(struct dive *d, bool shown)
* (or the second one if the first one is empty */
void combine_trips(struct dive_trip *trip_a, struct dive_trip *trip_b)
{
if (same_string(trip_a->location, "") && trip_b->location) {
if (empty_string(trip_a->location) && trip_b->location) {
free(trip_a->location);
trip_a->location = strdup(trip_b->location);
}
if (same_string(trip_a->notes, "") && trip_b->notes) {
if (empty_string(trip_a->notes) && trip_b->notes) {
free(trip_a->notes);
trip_a->notes = strdup(trip_b->notes);
}

6
core/divesite.c
View file

@ -239,9 +239,9 @@ uint32_t create_dive_site_with_gps(const char *name, degrees_t latitude, degrees
/* a uuid is always present - but if all the other fields are empty, the dive site is pointless */
bool dive_site_is_empty(struct dive_site *ds)
{
return same_string(ds->name, "") &&
same_string(ds->description, "") &&
same_string(ds->notes, "") &&
return empty_string(ds->name) &&
empty_string(ds->description) &&
empty_string(ds->notes) &&
ds->latitude.udeg == 0 &&
ds->longitude.udeg == 0;
}

4
core/file.c
View file

@ -268,7 +268,7 @@ int check_git_sha(const char *filename, struct git_repository **git_p, const cha
* get the SHA and compare with what we currently have */
if (git && git != dummy_git_repository) {
const char *sha = get_sha(git, branch);
if (!same_string(sha, "") &&
if (!empty_string(sha) &&
same_string(sha, current_sha)) {
fprintf(stderr, "already have loaded SHA %s - don't load again\n", sha);
free(current_sha);
@ -301,7 +301,7 @@ int parse_file(const char *filename)
* get the SHA and compare with what we currently have */
if (git && git != dummy_git_repository) {
const char *sha = get_sha(git, branch);
if (!same_string(sha, "") &&
if (!empty_string(sha) &&
same_string(sha, current_sha) &&
!unsaved_changes()) {
fprintf(stderr, "already have loaded SHA %s - don't load again\n", sha);

2
core/libdivecomputer.c
View file

@ -232,7 +232,7 @@ static int parse_gasmixes(device_data_t *devdata, struct dive *dive, dc_parser_t
fill_default_cylinder(&dive->cylinder[i]);
}
/* whatever happens, make sure there is a name for the cylinder */
if (same_string(dive->cylinder[i].type.description, ""))
if (empty_string(dive->cylinder[i].type.description))
dive->cylinder[i].type.description = strdup(translate("gettextFromC", "unknown"));
}
return DC_STATUS_SUCCESS;

2
core/linux.c
View file

@ -81,7 +81,7 @@ const char *system_default_filename(void)
static const char *path = NULL;
if (!path) {
const char *user = getenv("LOGNAME");
if (same_string(user, ""))
if (empty_string(user))
user = "username";
char *filename = calloc(strlen(user) + 5, 1);
strcat(filename, user);

2
core/load-git.c
View file

@ -217,7 +217,7 @@ static void parse_dive_location(char *line, struct membuffer *str, void *_dive)
dive->dive_site_uuid = uuid;
} else {
// we already had a dive site linked to the dive
if (same_string(ds->name, "")) {
if (empty_string(ds->name)) {
ds->name = strdup(name);
} else {
// and that dive site had a name. that's weird - if our name is different, add it to the notes

2
core/macos.c
View file

@ -84,7 +84,7 @@ const char *system_default_filename(void)
static const char *path = NULL;
if (!path) {
const char *user = getenv("LOGNAME");
if (same_string(user, ""))
if (empty_string(user))
user = "username";
char *filename = calloc(strlen(user) + 5, 1);
strcat(filename, user);

2
core/parse.c
View file

@ -469,7 +469,7 @@ void add_dive_site(char *ds_name, struct dive *dive)
}
if (ds) {
// we have a uuid, let's hope there isn't a different name
if (same_string(ds->name, "")) {
if (empty_string(ds->name)) {
ds->name = copy_string(buffer);
} else if (!same_string(ds->name, buffer)) {
// if it's not the same name, it's not the same dive site

14
core/qthelper.cpp
View file

@ -408,7 +408,7 @@ extern "C" void copy_image_and_overwrite(const char *cfileName, const char *path
extern "C" bool string_sequence_contains(const char *string_sequence, const char *text)
{
if (same_string(text, "") || same_string(string_sequence, ""))
if (empty_string(text) || empty_string(string_sequence))
return false;
QString stringSequence(string_sequence);
@ -525,7 +525,7 @@ QString uiLanguage(QLocale *callerLoc)
if (callerLoc)
*callerLoc = loc;
if (!prefs.date_format_override || same_string(prefs.date_format_short, "") || same_string(prefs.date_format, "")) {
if (!prefs.date_format_override || empty_string(prefs.date_format_short) || empty_string(prefs.date_format)) {
// derive our standard date format from what the locale gives us
// the short format is fine
// the long format uses long weekday and month names, so replace those with the short ones
@ -536,16 +536,16 @@ QString uiLanguage(QLocale *callerLoc)
// special hack for Swedish as our switching from long weekday names to short weekday names
// messes things up there
dateFormat.replace("'en' 'den' d:'e'", " d");
if (!prefs.date_format_override || same_string(prefs.date_format, "")) {
if (!prefs.date_format_override || empty_string(prefs.date_format)) {
free((void *)prefs.date_format);
prefs.date_format = strdup(qPrintable(dateFormat));
}
if (!prefs.date_format_override || same_string(prefs.date_format_short, "")) {
if (!prefs.date_format_override || empty_string(prefs.date_format_short)) {
free((void *)prefs.date_format_short);
prefs.date_format_short = strdup(qPrintable(shortDateFormat));
}
}
if (!prefs.time_format_override || same_string(prefs.time_format, "")) {
if (!prefs.time_format_override || empty_string(prefs.time_format)) {
timeFormat = loc.timeFormat();
timeFormat.replace("(t)", "").replace(" t", "").replace("t", "").replace("hh", "h").replace("HH", "H").replace("'kl'.", "");
timeFormat.replace(".ss", "").replace(":ss", "").replace("ss", "");
@ -1186,7 +1186,7 @@ void hashPicture(struct picture *picture)
return;
char *oldHash = copy_string(picture->hash);
learnHash(picture, hashFile(localFilePath(picture->filename)));
if (!same_string(picture->hash, "") && !same_string(picture->hash, oldHash))
if (!empty_string(picture->hash) && !same_string(picture->hash, oldHash))
mark_divelist_changed((true));
free(oldHash);
picture_free(picture);
@ -1430,7 +1430,7 @@ int getCloudURL(QString &filename)
{
QString email = QString(prefs.cloud_storage_email);
email.replace(QRegularExpression("[^a-zA-Z0-9@._+-]"), "");
if (email.isEmpty() || same_string(prefs.cloud_storage_password, ""))
if (email.isEmpty() || empty_string(prefs.cloud_storage_password))
return report_error("Please configure Cloud storage email and password in the preferences");
if (email != prefs.cloud_storage_email_encoded) {
free((void *)prefs.cloud_storage_email_encoded);

2
core/subsurfacestartup.c
View file

@ -159,7 +159,7 @@ void print_files()
const char *filename, *local_git;
printf("\nFile locations:\n\n");
if (!same_string(prefs.cloud_storage_email, "") && !same_string(prefs.cloud_storage_password, "")) {
if (!empty_string(prefs.cloud_storage_email) && !empty_string(prefs.cloud_storage_password)) {
filename = cloud_url();
is_git_repository(filename, &branch, &remote, true);