diff options
Diffstat (limited to 'deco.c')
| -rw-r--r-- | deco.c | 44 |
1 files changed, 44 insertions, 0 deletions
@@ -11,8 +11,11 @@ * deco_allowed_depth(tissues_tolerance, surface_pressure, dive, smooth) * - ceiling based on lead tissue, surface pressure, 3m increments or smooth * set_gf(gflow, gfhigh) - set Buehlmann gradient factors + * void cache_deco_state(tissue_tolerance, char **datap) - cache the relevant data allocate memory if needed + * double restore_deco_state(char *data) - restore the state and return the tissue_tolerance */ #include <math.h> +#include <string.h> #include "dive.h" //! Option structure for Buehlmann decompression. @@ -88,6 +91,7 @@ double tissue_he_sat[16]; double tissue_tolerated_ambient_pressure[16]; int ci_pointing_to_guiding_tissue; double gf_low_position_this_dive; +#define TISSUE_ARRAY_SZ sizeof(tissue_n2_sat) static double actual_gradient_limit(const struct dive_data *data) { @@ -222,6 +226,46 @@ void clear_deco(double surface_pressure) gf_low_position_this_dive = buehlmann_config.gf_low_position_min; } +void cache_deco_state(double tissue_tolerance, char **cached_datap) +{ + char *data = *cached_datap; + + if (!data) { + data = malloc(3 * TISSUE_ARRAY_SZ + 2 * sizeof(double) + sizeof(int)); + *cached_datap = data; + } + memcpy(data, tissue_n2_sat, TISSUE_ARRAY_SZ); + data += TISSUE_ARRAY_SZ; + memcpy(data, tissue_he_sat, TISSUE_ARRAY_SZ); + data += TISSUE_ARRAY_SZ; + memcpy(data, tissue_tolerated_ambient_pressure, TISSUE_ARRAY_SZ); + data += TISSUE_ARRAY_SZ; + memcpy(data, &gf_low_position_this_dive, sizeof(double)); + data += sizeof(double); + memcpy(data, &tissue_tolerance, sizeof(double)); + data += sizeof(double); + memcpy(data, &ci_pointing_to_guiding_tissue, sizeof(int)); +} + +double restore_deco_state(char *data) +{ + double tissue_tolerance; + + memcpy(tissue_n2_sat, data, TISSUE_ARRAY_SZ); + data += TISSUE_ARRAY_SZ; + memcpy(tissue_he_sat, data, TISSUE_ARRAY_SZ); + data += TISSUE_ARRAY_SZ; + memcpy(tissue_tolerated_ambient_pressure, data, TISSUE_ARRAY_SZ); + data += TISSUE_ARRAY_SZ; + memcpy(&gf_low_position_this_dive, data, sizeof(double)); + data += sizeof(double); + memcpy(&tissue_tolerance, data, sizeof(double)); + data += sizeof(double); + memcpy(&ci_pointing_to_guiding_tissue, data, sizeof(int)); + + return tissue_tolerance; +} + unsigned int deco_allowed_depth(double tissues_tolerance, double surface_pressure, struct dive *dive, gboolean smooth) { unsigned int depth, multiples_of_3m; |