path: root/src/nvim/indent.c

#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

#include "nvim/ascii_defs.h"
#include "nvim/assert_defs.h"
#include "nvim/buffer.h"
#include "nvim/change.h"
#include "nvim/charset.h"
#include "nvim/cursor.h"
#include "nvim/drawscreen.h"
#include "nvim/edit.h"
#include "nvim/eval.h"
#include "nvim/eval/typval_defs.h"
#include "nvim/ex_cmds_defs.h"
#include "nvim/ex_docmd.h"
#include "nvim/extmark.h"
#include "nvim/func_attr.h"
#include "nvim/gettext.h"
#include "nvim/globals.h"
#include "nvim/indent.h"
#include "nvim/indent_c.h"
#include "nvim/mark.h"
#include "nvim/mbyte.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/message.h"
#include "nvim/move.h"
#include "nvim/option.h"
#include "nvim/option_vars.h"
#include "nvim/optionstr.h"
#include "nvim/os/input.h"
#include "nvim/plines.h"
#include "nvim/pos_defs.h"
#include "nvim/regexp.h"
#include "nvim/search.h"
#include "nvim/state_defs.h"
#include "nvim/strings.h"
#include "nvim/textformat.h"
#include "nvim/types_defs.h"
#include "nvim/undo.h"
#include "nvim/vim_defs.h"

#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "indent.c.generated.h"
#endif

/// Set the integer values corresponding to the string setting of 'vartabstop'.
/// "array" will be set, caller must free it if needed.
///
/// @return  false for an error.
bool tabstop_set(char *var, colnr_T **array)
{
  int valcount = 1;
  int t;
  char *cp;

  if (var[0] == NUL || (var[0] == '0' && var[1] == NUL)) {
    *array = NULL;
    return true;
  }

  for (cp = var; *cp != NUL; cp++) {
    if (cp == var || cp[-1] == ',') {
      char *end;

      if (strtol(cp, &end, 10) <= 0) {
        if (cp != end) {
          emsg(_(e_positive));
        } else {
          semsg(_(e_invarg2), cp);
        }
        return false;
      }
    }

    if (ascii_isdigit(*cp)) {
      continue;
    }
    if (cp[0] == ',' && cp > var && cp[-1] != ',' && cp[1] != NUL) {
      valcount++;
      continue;
    }
    semsg(_(e_invarg2), var);
    return false;
  }

  *array = (colnr_T *)xmalloc((unsigned)(valcount + 1) * sizeof(int));
  (*array)[0] = (colnr_T)valcount;

  t = 1;
  for (cp = var; *cp != NUL;) {
    int n = atoi(cp);

    // Catch negative values, overflow and ridiculous big values.
    if (n <= 0 || n > TABSTOP_MAX) {
      semsg(_(e_invarg2), cp);
      XFREE_CLEAR(*array);
      return false;
    }
    (*array)[t++] = n;
    while (*cp != NUL && *cp !=