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Create simple non-thread-safe "gasname()" function

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Every single user of the get_gas_name() function wanted to just use the
result to create a message or printout, and that made the interface a bit
cumbersome.

This adds a "gasname()" wrapper that returns a static buffer with the
result in it, which is neither pretty nor thread-safe, but is a much
simpler interface to work with.

Our dive planning isn't multi-threaded, so nothing should care.

[ This also converts a few open-coded gasname debug printouts to use the
  helper function, resulting in prettier printouts and less code ]

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Linus Torvalds 2014-06-01 18:25:44 -07:00 • committed by Dirk Hohndel
parent d825d689dd
commit ee36bf8bf3
1 changed files with 21 additions and 24 deletions
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45
planner.c
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@ -103,6 +103,14 @@ static void get_gas_string(const struct gasmix *gasmix, char *text, int len)
snprintf(text, len, "(%d/%d)", (get_o2(gasmix) + 5) / 10, (get_he(gasmix) + 5) / 10);
}
/* Returns a static char buffer - only good for immediate use by printf etc */
static const char *gasname(const struct gasmix *gasmix)
{
static char gas[64];
get_gas_string(gasmix, gas, sizeof(gas));
return gas;
}
double interpolate_transition(struct dive *dive, int t0, int t1, int d0, int d1, const struct gasmix *gasmix, int ppo2)
{
int j;
@ -143,9 +151,7 @@ double tissue_at_end(struct dive *dive, char **cached_datap)
t1 = sample->time.seconds;
get_gas_from_events(&dive->dc, t0, &gas);
if ((gasidx = get_gasidx(dive, &gas)) == -1) {
char gas_string[50];
get_gas_string(&gas, gas_string, sizeof(gas_string));
report_error(translate("gettextFromC", "Can't find gas %s"), gas_string);
report_error(translate("gettextFromC", "Can't find gas %s"), gasname(&gas));
gasidx = 0;
}
if (i > 0)
@ -200,9 +206,7 @@ static int verify_gas_exists(struct dive *dive, struct gasmix mix_in)
if (gasmix_distance(&cyl->gasmix, &mix_in) < 200)
return i;
}
char gas[50];
get_gas_string(&mix_in, gas, sizeof(gas));
fprintf(stderr, "this gas %s should have been on the cylinder list\nThings will fail now\n", gas);
fprintf(stderr, "this gas %s should have been on the cylinder list\nThings will fail now\n", gasname(&mix_in));
return -1;
}
@ -439,10 +443,11 @@ static struct gaschanges *analyze_gaslist(struct diveplan *diveplan, struct dive
}
*gaschangenr = nr;
#if DEBUG_PLAN & 16
for (nr = 0; nr < *gaschangenr; nr++)
printf("gaschange nr %d: @ %5.2lfm gasidx %d (%d/%d)\n", nr, gaschanges[nr].depth / 1000.0,
gaschanges[nr].gasidx, (get_o2(&dive->cylinder[gaschanges[nr].gasidx].gasmix) + 5) / 10,
(get_he(&dive->cylinder[gaschanges[nr].gasidx].gasmix) + 5) / 10);
for (nr = 0; nr < *gaschangenr; nr++) {
int idx = gaschanges[nr].gasidx;
printf("gaschange nr %d: @ %5.2lfm gasidx %d (%s)\n", nr, gaschanges[nr].depth / 1000.0,
idx, gasname(&dive->cylinder[idx].gasmix));
}
#endif
return gaschanges;
}
@ -521,7 +526,6 @@ static void add_plan_to_notes(struct diveplan *diveplan, struct dive *dive, bool
do {
struct gasmix gasmix, newgasmix;
const char *depth_unit;
char gas[64];
double depthvalue;
int decimals;
struct divedatapoint *nextdp;
@ -546,7 +550,6 @@ static void add_plan_to_notes(struct diveplan *diveplan, struct dive *dive, bool
dp->depth != lastdepth &&
nextdp->depth != dp->depth)
continue;
get_gas_string(&gasmix, gas, sizeof(gas));
gasidx = get_gasidx(dive, &gasmix);
len = strlen(buffer);
if (dp->depth != lastdepth)
@ -554,18 +557,16 @@ static void add_plan_to_notes(struct diveplan *diveplan, struct dive *dive, bool
decimals, depthvalue, depth_unit,
FRACTION(dp->time - lasttime, 60),
FRACTION(dp->time, 60),
gas);
gasname(&gasmix));
else
snprintf(buffer + len, sizeof(buffer) - len, translate("gettextFromC", "Stay at %.*f %s for %d:%02d min - runtime %d:%02u on %s\n"),
decimals, depthvalue, depth_unit,
FRACTION(dp->time - lasttime, 60),
FRACTION(dp->time, 60),
gas);
gasname(&gasmix));
if (nextdp && gasmix_distance(&gasmix, &newgasmix)) {
// gas switch at this waypoint
get_gas_string(&newgasmix, gas, sizeof(gas));
len = strlen(buffer);
snprintf(buffer + len, sizeof(buffer) - len, translate("gettextFromC", "Switch gas to %s\n"), gas);
snprintf(buffer + len, sizeof(buffer) - len, translate("gettextFromC", "Switch gas to %s\n"), gasname(&newgasmix));
gasmix = newgasmix;
}
lasttime = dp->time;
@ -576,13 +577,11 @@ static void add_plan_to_notes(struct diveplan *diveplan, struct dive *dive, bool
for (gasidx = 0; gasidx < MAX_CYLINDERS; gasidx++) {
double volume;
const char *unit;
char gas[64];
const char *warning = "";
cylinder_t *cyl = &dive->cylinder[gasidx];
if (cylinder_none(cyl))
break;
len = strlen(buffer);
get_gas_string(&cyl->gasmix, gas, sizeof(gas));
volume = get_volume_units(cyl->gas_used.mliter, NULL, &unit);
if (cyl->type.size.mliter) {
/* Warn if the plan uses more gas than is available in a cylinder
@ -591,7 +590,7 @@ static void add_plan_to_notes(struct diveplan *diveplan, struct dive *dive, bool
if (cyl->end.mbar < 10000)
warning = translate("gettextFromC", "WARNING: this is more gas than available in the specified cylinder!");
}
snprintf(buffer + len, sizeof(buffer) - len, translate("gettextFromC", "%.0f%s of %s%s\n"), volume, unit, gas, warning);
snprintf(buffer + len, sizeof(buffer) - len, translate("gettextFromC", "%.0f%s of %s%s\n"), volume, unit, gasname(&cyl->gasmix), warning);
}
dive->notes = strdup(buffer);
}
@ -651,9 +650,7 @@ void plan(struct diveplan *diveplan, char **cached_datap, struct dive **divep, s
get_gas_from_events(&dive->dc, sample->time.seconds, &gas);
po2 = dive->dc.sample[dive->dc.samples - 1].po2;
if ((current_cylinder = get_gasidx(dive, &gas)) == -1) {
char gas_string[50];
get_gas_string(&gas, gas_string, sizeof(gas_string));
report_error(translate("gettextFromC", "Can't find gas %s"), gas_string);
report_error(translate("gettextFromC", "Can't find gas %s"), gasname(&gas));
current_cylinder = 0;
}
depth = dive->dc.sample[dive->dc.samples - 1].depth.mm;
@ -675,7 +672,7 @@ void plan(struct diveplan *diveplan, char **cached_datap, struct dive **divep, s
tissue_tolerance = tissue_at_end(dive, cached_datap);
#if DEBUG_PLAN & 4
printf("gas %d/%d\n", gas.o2.permille, gas.he.permille);
printf("gas %s\n", gasname(&gas));
printf("depth %5.2lfm ceiling %5.2lfm\n", depth / 1000.0, ceiling / 1000.0);
#endif