teapot-spreadsheet/src/common/cell.c

#include "cell.h"

#include <assert.h>
#include <string.h>

#include "default.h"
#include "eval.h"
#include "main.h"

const ColorNum DefaultCN[] =
  { [FOREGROUND] = 0, [BACKGROUND] = 16, [NUM_COLOR_ASPECTS] = 255 };

/* initcellcontents - make a fresh cell into the "empty" one; don't worry
   about freeing anything there, that will have been handled. */
void initcellcontents(Cell *fresh)
{
  (void)memset(fresh->contents, 0, sizeof(fresh->contents));
  fresh->label=(char*)0;
  fresh->adjust=AUTOADJUST;
  fresh->precision=-1;
  fresh->shadowed=0;
  fresh->bold=0;
  fresh->underline=0;
  for (ColorAspect a = FOREGROUND; a < NUM_COLOR_ASPECTS; ++a)
    fresh->aspect[a] = DefaultCN[a];
  fresh->scientific=DEF_SCIENTIFIC;
  fresh->value.type=EMPTY;
  fresh->resvalue.type=EMPTY;
  fresh->locked=0;
  fresh->ignored=0;
  fresh->clock_t0=0;
  fresh->clock_t1=0;
  fresh->clock_t2=0;
}

/* getcont       -- get contents */
Token **getcont(const Cell *cell, ContentVariety v)
{
  if (cell == NULLCELL) return EMPTY_TVEC;
  if (v == CONTINGENT)
    v = (cell->clock_t0 && cell->contents[ITERATIVE]) ? ITERATIVE : BASE;
  return cell->contents[v];
}

/* getadjust     -- get cell adjustment */
Adjust getadjust(const Cell* cell)
{
  if (cell == NULLCELL) return LEFT;
  else if (cell->adjust == AUTOADJUST)
    return (cell->value.type == INT || cell->value.type == FLOAT ? RIGHT : LEFT);
  else return cell->adjust;
}

/* shadowed      -- is cell shadowed? */
bool shadowed(const Cell *cell)
{
  return (cell != NULLCELL) && cell->shadowed;
}

/* isbold      -- is cell bold? */
bool isbold(const Cell* cell)
{
  return (cell != NULLCELL) && cell->bold;
}

/* getcolor -- a color associated to cell */
ColorNum getcolor(const Cell* cell, ColorAspect aspect)
{
  return cell == NULLCELL ? DefaultCN[aspect] : cell->aspect[aspect];
}

/* isunderline      -- is cell underlined? */
bool underlined(const Cell *cell)
{
  return (cell != NULLCELL) && cell->underline;
}

/* locked        -- is cell locked? */
bool locked(const Cell *cell)
{
  return (cell != NULLCELL) && cell->locked;
}

/* transparent   -- is cell transparent? */
bool transparent(const Cell* cell)
{
  return (cell != NULLCELL) && cell->transparent;
}

/* ignored       -- is cell ignored? */
bool ignored(const Cell *cell)
{
  return (cell != NULLCELL) && cell->ignored;
}


/* getscientific -- should value be displayed in scientific notation? */
bool getscientific(const Cell *cell )
{
  return (cell == NULLCELL) ? DEF_SCIENTIFIC : cell->scientific;
}

/* getprecision  -- get cell precision */
int getprecision(const Cell *cell)
{
  if (cell == NULLCELL || cell->precision == -1) return def_precision;
  return cell->precision;
}

/* getlabel      -- get cell label */
const char *getlabel(const Cell* cell)
{
  if (cell == NULLCELL || cell->label == (char*)0) return "";
  return cell->label;
}

/* copytokens    -- copy a sequence of tokens, possibly reallocating dest */
static void copytokens(Token*** totoks, Token** fromtoks)
{
  size_t from_len = tveclen(fromtoks);
  if (from_len == 0)
  {
    tvecfree(*totoks);
    *totoks = EMPTY_TVEC;
    return;
  }

  size_t to_len = tveclen(*totoks);
  if (from_len > to_len || *totoks == fromtoks)
  {
    if (*totoks != fromtoks) tvecfree(*totoks);
    *totoks = malloc((from_len+1)*sizeof(Token*));
    (*totoks)[from_len] = NULLTOKEN;
  } else {
    tvecfreetoks(*totoks);
  }
  for (size_t i = 0; i<from_len; ++i) /* destination already has NULLTOKEN at end */
  {
    if (fromtoks[i] == NULLTOKEN) (*totoks)[i] = NULLTOKEN;
    else
    {
      (*totoks)[i] = malloc(sizeof(Token));
      *((*totoks)[i]) = tcopy(*(fromtoks[i]));
    }
  }
}

/* freecellcontents -- free the resources of the cell at destruction time */
void freecellcontents(Cell *faded)
{
  tvecfree(faded->contents[BASE]);
  tvecfree(faded->contents[ITERATIVE]);
  tfree(&(faded->value));
  tfree(&(faded->resvalue));
  if (faded->label != (char*)0) {
    free(faded->label);
  }
}

/* copycell  - copies one Cell to another, handling any allocation issues */
void copycell(Cell *to, const Cell *fromcell)
{
  assert(to != NULLCELL);
  if (to == fromcell) return;

  freecellcontents(to);
  if (fromcell != NULLCELL) {
    memcpy(to, fromcell, sizeof(Cell));
    copytokens(&(to->contents[BASE]), fromcell->contents[BASE]);
    copytokens(&(to->contents[ITERATIVE]), fromcell->contents[ITERATIVE]);
    if (fromcell->label != (char*)0) {
      size_t len = strlen(fromcell->label);
      to->label = strcpy(malloc(len+2), fromcell->label);
      (to->label)[len] = '_';
      (to->label)[len+1] = '\0';
    }
    to->value.type = EMPTY;
    to->resvalue.type = EMPTY;
  } else {
    initcellcontents(to);
  }
}