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salome-paravis  6.5.0
Classes | Functions
vtkWrapText.c File Reference
#include "vtkWrapText.h"
#include "vtkWrap.h"
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>

Go to the source code of this file.

Classes

struct  vtkWPString

Functions

const char * vtkWrapText_QuoteString (const char *comment, size_t maxlen)
 vtkWrap provides useful functions for generating wrapping code.
static void vtkWPString_Append (struct vtkWPString *str, const char *text)
static void vtkWPString_PushChar (struct vtkWPString *str, char c)
static void vtkWPString_Strip (struct vtkWPString *str, const char *trailers)
static char vtkWPString_LastChar (struct vtkWPString *str)
static void vtkWPString_BreakSignatureLine (struct vtkWPString *str, size_t *linestart, size_t indentation)
static void vtkWPString_BreakCommentLine (struct vtkWPString *str, size_t *linestart, size_t indent)
const char * vtkWrapText_FormatSignature (const char *signature, size_t width, size_t maxlen)
 Format a method signature by applying word-wrap at the specified width and taking special care not to split any literals or names.
const char * vtkWrapText_FormatComment (const char *comment, size_t width)
 Format a doxygen comment for plain text, and word-wrap at the specified width.
static void vtkWrapText_PythonTypeSignature (struct vtkWPString *result, const char *delims[2], ValueInfo *arg)
static void vtkWrapText_PythonArraySignature (struct vtkWPString *result, const char *classname, const char *delims[2], int ndim, const char **dims)
const char * vtkWrapText_PythonSignature (FunctionInfo *currentFunction)
 Produce a python signature for a method, for use in documentation.

Class Documentation

struct vtkWPString

Definition at line 99 of file vtkWrapText.c.

Class Members
size_t len
size_t maxlen
char * str

Function Documentation

static void vtkWPString_Append ( struct vtkWPString str,
const char *  text 
) [static]

Definition at line 107 of file vtkWrapText.c.

{
  size_t n = strlen(text);

  if (str->len + n + 1 > str->maxlen)
    {
    str->maxlen = (str->len + n + 1 + 2*str->maxlen);
    str->str = (char *)realloc(str->str, str->maxlen);
    }

  strncpy(&str->str[str->len], text, n);
  str->len += n;
  str->str[str->len] = '\0';
}

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static void vtkWPString_BreakCommentLine ( struct vtkWPString str,
size_t *  linestart,
size_t  indent 
) [static]

Definition at line 267 of file vtkWrapText.c.

{
  size_t i = 0;
  size_t j = *linestart;
  size_t l = str->len;
  char *text = str->str;

  if (!text)
    {
    return;
    }

  /* try to break the line at a word */
  while (l > 0 && text[l-1] != ' ' && text[l-1] != '\n')
    {
    l--;
    }
  if (l > 0 && text[l-1] != '\n' && l-j > indent)
    {
    /* replace space with newline */
    text[l-1] = '\n';
    j = l;

    /* Append some chars to guarantee size */
    vtkWPString_PushChar(str, '\n');
    vtkWPString_PushChar(str, '\n');
    for (i = 0; i < indent; i++)
      {
      vtkWPString_PushChar(str, ' ');
      }
    /* re-get the char pointer, it may have been reallocated */
    text = str->str;
    str->len -= indent+2;

    if (str->len > l && indent > 0)
      {
      memmove(&text[l+indent], &text[l], str->len-l);
      memset(&text[l], ' ', indent);
      str->len += indent;
      }
    }
  else
    {
    /* long word, just split the word */
    vtkWPString_PushChar(str, '\n');
    j = str->len;
    for (i = 0; i < indent; i++)
      {
      vtkWPString_PushChar(str, ' ');
      }
    }

  /* return the new line start position */
  *linestart = j;
}

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static void vtkWPString_BreakSignatureLine ( struct vtkWPString str,
size_t *  linestart,
size_t  indentation 
) [static]

Definition at line 179 of file vtkWrapText.c.

{
  size_t i = 0;
  size_t m = 0;
  size_t j = *linestart;
  size_t l = str->len;
  size_t k = str->len;
  char *text = str->str;
  char delim;

  if (!text)
    {
    return;
    }

  while (l > j && text[l-1] != '\n' && text[l-1] != ',' &&
    text[l-1] != '(' && text[l-1] != ')')
    {
    /* treat each string as a unit */
    if (l > 4 && (text[l-1] == '\'' || text[l-1] == '\"'))
      {
      delim = text[l-1];
      l -= 2;
      while (l > 3 && (text[l-1] != delim || text[l-3] == '\\'))
        {
        l--;
        if (text[l-1] == '\\')
          {
          l--;
          }
        }
      l -= 2;
      }
    else
      {
      l--;
      }
    }

  /* if none of these chars was found, split is impossible */
  if (text[l-1] != ',' && text[l-1] != '(' &&
      text[l-1] != ')' && text[l-1] != '\n')
    {
    j++;
    }

  else
    {
    /* Append some chars to guarantee size */
    vtkWPString_PushChar(str, '\n');
    vtkWPString_PushChar(str, '\n');
    for (i = 0; i < indentation; i++)
      {
      vtkWPString_PushChar(str, ' ');
      }
    /* re-get the char pointer, it may have been reallocated */
    text = str->str;

    if (k > l)
      {
      m = 0;
      while (m < indentation+2 && text[l+m] == ' ')
        {
        m++;
        }
      memmove(&text[l+indentation+2-m], &text[l], k-l);
      k += indentation+2-m;
      }
    else
      {
      k += indentation+2;
      }
    text[l++] = '\\'; text[l++] = 'n';
    j = l;
    for (i = 0; i < indentation; i++)
      {
      text[l++] = ' ';
      }
    }

  str->len = k;

  /* return the new line start position */
  *linestart = j;
}

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static char vtkWPString_LastChar ( struct vtkWPString str) [static]

Definition at line 168 of file vtkWrapText.c.

{
  if (str->str && str->len > 0)
    {
    return str->str[str->len-1];
    }
  return '\0';
}

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static void vtkWPString_PushChar ( struct vtkWPString str,
char  c 
) [static]

Definition at line 124 of file vtkWrapText.c.

{
  if (str->len + 2 > str->maxlen)
    {
    str->maxlen = (str->len + 2 + 2*str->maxlen);
    str->str = (char *)realloc(str->str, str->maxlen);
    }

  str->str[str->len++] = c;
  str->str[str->len] = '\0';
}

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static void vtkWPString_Strip ( struct vtkWPString str,
const char *  trailers 
) [static]

Definition at line 138 of file vtkWrapText.c.

{
  size_t k = str->len;
  char *cp = str->str;
  size_t j = 0;
  size_t n;

  if (cp)
    {
    n = strlen(trailers);

    while (k > 0 && j < n)
      {
      for (j = 0; j < n; j++)
        {
        if (cp[k-1] == trailers[j])
          {
          k--;
          break;
          }
        }
      }

    str->len = k;
    str->str[k] = '\0';
    }
}

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const char* vtkWrapText_FormatComment ( const char *  comment,
size_t  width 
)

Format a doxygen comment for plain text, and word-wrap at the specified width.

A 70-char width is recommended.

Definition at line 447 of file vtkWrapText.c.

{
  static struct vtkWPString staticString = { NULL, 0, 0 };
  struct vtkWPString *text;
  const char *cp;
  size_t i, j, l;
  size_t indent = 0;
  int nojoin = 0;
  int start;

  text = &staticString;
  text->len = 0;

  if (comment == 0)
    {
    return "";
    }

  i = 0; j = 0; l = 0;
  start = 1;
  cp = comment;

  /* skip any leading whitespace */
  while (cp[i] == '\n' || cp[i] == '\r' ||
         cp[i] == '\t' || cp[i] == ' ')
    {
    i++;
    }

  while (cp[i] != '\0')
    {
    /* Add characters until the output line is complete */
    while (cp[i] != '\0' && text->len-j < width)
      {
      /* if the end of the line was found, see how next line begins */
      if (start)
        {
        /* eat the leading space */
        if (cp[i] == ' ')
          {
          i++;
          }

        /* skip ahead to find any interesting first characters */
        l = i;
        while (cp[l] == ' ' || cp[l] == '\t' || cp[l] == '\r')
          {
          l++;
          }

        /* check for new section */
        if (cp[l] == '.' && strncmp(&cp[l], ".SECTION", 8) == 0)
          {
          vtkWPString_Strip(text, "\n");
          if (text->len > 0)
            {
            vtkWPString_PushChar(text, '\n');
            vtkWPString_PushChar(text, '\n');
            }
          i = l+8;
          while (cp[i] == '\r' || cp[i] == '\t' || cp[i] == ' ')
            {
            i++;
            }
          while (cp[i] != '\n' && cp[i] != '\0')
            {
            vtkWPString_PushChar(text, cp[i++]);
            }
          vtkWPString_Strip(text, " \t\r");

          if (vtkWPString_LastChar(text) != ':')
            {
            vtkWPString_PushChar(text, ':');
            }
          vtkWPString_PushChar(text, '\n');
          vtkWPString_PushChar(text, '\n');
          j = text->len;
          indent = 0;
          if (cp[i] == '\n')
            {
            i++;
            }
          start = 1;
          continue;
          }

        /* handle doxygen tags that appear at start of line */
        if (cp[l] == '\\' || cp[l] == '@')
          {
          if (strncmp(&cp[l+1], "brief", 5) == 0 ||
              strncmp(&cp[l+1], "short", 5) == 0 ||
              strncmp(&cp[l+1], "pre", 3) == 0 ||
              strncmp(&cp[l+1], "post", 4) == 0 ||
              strncmp(&cp[l+1], "param", 5) == 0 ||
              strncmp(&cp[l+1], "tparam", 6) == 0 ||
              strncmp(&cp[l+1], "cmdparam", 8) == 0 ||
              strncmp(&cp[l+1], "exception", 9) == 0 ||
              strncmp(&cp[l+1], "return", 6) == 0 ||
              strncmp(&cp[l+1], "li", 2) == 0)
            {
            nojoin = 2;
            indent = 4;
            if (text->len > 0 && vtkWPString_LastChar(text) != '\n')
              {
              vtkWPString_PushChar(text, '\n');
              }
            j = text->len;
            i = l;
            }
          }

        /* handle bullets and numbering */
        else if (cp[l] == '-' || cp[l] == '*' || cp[l] == '#' ||
                 (cp[l] >= '0' && cp[l] <= '9' &&
                  (cp[l+1] == ')' || cp[l+1] == '.') && cp[l+2] == ' '))
          {
          indent = 0;
          while (indent < 3 && cp[l+indent] != ' ')
            {
            indent++;
            }
          indent++;
          if (text->len > 0 && vtkWPString_LastChar(text) != '\n')
            {
            vtkWPString_PushChar(text, '\n');
            }
          j = text->len;
          i = l;
          }

        /* keep paragraph breaks */
        else if (cp[l] == '\n')
          {
          i = l+1;
          vtkWPString_Strip(text, "\n");
          if (text->len > 0)
            {
            vtkWPString_PushChar(text, '\n');
            vtkWPString_PushChar(text, '\n');
            }
          nojoin = 0;
          indent = 0;
          j = text->len;
          start = 1;
          continue;
          }

        /* add newline if nojoin is not set */
        else if (nojoin ||
                (cp[i] == ' ' && !indent))
          {
          if (nojoin == 2)
            {
            nojoin = 0;
            indent = 0;
            }
          vtkWPString_PushChar(text, '\n');
          j = text->len;
          }

        /* do line joining */
        else if (text->len > 0 && vtkWPString_LastChar(text) != '\n')
          {
          i = l;
          vtkWPString_PushChar(text, ' ');
          }
        }

      /* handle quotes */
      if (cp[i] == '\"')
        {
        size_t q = i;
        size_t r = text->len;

        /* try to keep the quote whole */
        vtkWPString_PushChar(text, cp[i++]);
        while (cp[i] != '\"' && cp[i] != '\r' &&
               cp[i] != '\n' && cp[i] != '\0')
          {
          vtkWPString_PushChar(text, cp[i++]);
          }
        /* if line ended before quote did, then reset */
        if (cp[i] != '\"')
          {
          i = q;
          text->len = r;
          }
        }
      else if (cp[i] == '\'')
        {
        size_t q = i;
        size_t r = text->len;

        /* try to keep the quote whole */
        vtkWPString_PushChar(text, cp[i++]);
        while (cp[i] != '\'' && cp[i] != '\r' &&
               cp[i] != '\n' && cp[i] != '\0')
          {
          vtkWPString_PushChar(text, cp[i++]);
          }
        /* if line ended before quote did, then reset */
        if (cp[i] != '\'')
          {
          i = q;
          text->len = r;
          }
        }

      /* handle simple html tags */
      else if (cp[i] == '<')
        {
        l = i+1;
        if (cp[l] == '/') { l++; }
        while ((cp[l] >= 'a' && cp[l] <= 'z') ||
               (cp[l] >= 'a' && cp[l] <= 'z')) { l++; }
        if (cp[l] == '>')
          {
          if (cp[i+1] == 'p' || cp[i+1] == 'P' ||
              (cp[i+1] == 'b' && cp[i+2] == 'r') ||
              (cp[i+1] == 'B' && cp[i+2] == 'R'))
            {
            vtkWPString_Strip(text, " \n");
            vtkWPString_PushChar(text, '\n');
            vtkWPString_PushChar(text, '\n');
            j = text->len;
            indent = 0;
            }
          i = l+1;
          while (cp[i] == '\r' || cp[i] == '\t' || cp[i] == ' ')
            {
            i++;
            }
          }
        }
      else if (cp[i] == '\\' || cp[i] == '@')
        {
        /* handle simple doxygen tags */
        if (strncmp(&cp[i+1], "em ", 3) == 0)
          {
          i += 4;
          }
        else if (strncmp(&cp[i+1], "a ", 2) == 0 ||
                 strncmp(&cp[i+1], "e ", 2) == 0 ||
                 strncmp(&cp[i+1], "c ", 2) == 0 ||
                 strncmp(&cp[i+1], "b ", 2) == 0 ||
                 strncmp(&cp[i+1], "p ", 2) == 0 ||
                 strncmp(&cp[i+1], "f$", 2) == 0 ||
                 strncmp(&cp[i+1], "f[", 2) == 0 ||
                 strncmp(&cp[i+1], "f]", 2) == 0)
          {
          if (i > 0 && cp[i-1] != ' ')
            {
            vtkWPString_PushChar(text, ' ');
            }
          if (cp[i+1] == 'f')
            {
            if (cp[i+2] == '$')
              {
              vtkWPString_PushChar(text, '$');
              }
            else
              {
              vtkWPString_PushChar(text, '\\');
              vtkWPString_PushChar(text, cp[i+2]);
              }
            }
          i += 3;
          }
        else if (cp[i+1] == '&' || cp[i+1] == '$' || cp[i+1] == '#' ||
                 cp[i+1] == '<' || cp[i+1] == '>' || cp[i+1] == '%' ||
                 cp[i+1] == '@' || cp[i+1] == '\\' || cp[i+1] == '\"')
          {
          i++;
          }
        else if (cp[i+1] == 'n')
          {
          vtkWPString_Strip(text, " \n");
          vtkWPString_PushChar(text, '\n');
          vtkWPString_PushChar(text, '\n');
          indent = 0;
          i += 2;
          j = text->len;
          }
        else if (strncmp(&cp[i+1], "code", 4) == 0)
          {
          nojoin = 1;
          i += 5;
          while (cp[i] == ' ' || cp[i] == '\r' ||
                 cp[i] == '\t' || cp[i] == '\n')
            {
            i++;
            }
          }
        else if (strncmp(&cp[i+1], "endcode", 7) == 0)
          {
          nojoin = 0;
          i += 8;
          l = i;
          while (cp[l] == ' ' || cp[l] == '\t' || cp[l] == '\r')
            {
            l++;
            }
          if (cp[l] == '\n')
            {
            i = l;
            vtkWPString_PushChar(text, '\n');
            j = text->len;
            }
          }
        else if (strncmp(&cp[i+1], "verbatim", 8) == 0)
          {
          i += 9;
          while (cp[i] != '\0' && ((cp[i] != '@' && cp[i] != '\\') ||
                 strncmp(&cp[i+1], "endverbatim", 11) != 0))
            {
            if (cp[i] != '\r')
              {
              vtkWPString_PushChar(text, cp[i]);
              }
            if (cp[i] == '\n')
              {
              j = text->len;
              }
            i++;
            }
          if (cp[i] != '\0')
            {
            i += 12;
            }
          }
        }

      /* search for newline */
      start = 0;
      l = i;
      while (cp[l] == ' ' || cp[l] == '\t' || cp[l] == '\r')
        {
        l++;
        }
      if (cp[l] == '\n')
        {
        i = l+1;
        start = 1;
        }

      /* append */
      else if (cp[i] != '\0')
        {
        vtkWPString_PushChar(text, cp[i++]);
        }

      } /* while (cp[i] != '\0' && text->len-j < width) */

    if (cp[i] == '\0')
      {
      break;
      }

    vtkWPString_BreakCommentLine(text, &j, indent);
    }

  /* remove any trailing blank lines */
  vtkWPString_Strip(text, "\n");
  vtkWPString_PushChar(text, '\n');

  return text->str;
}

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const char* vtkWrapText_FormatSignature ( const char *  signature,
size_t  width,
size_t  maxlen 
)

Format a method signature by applying word-wrap at the specified width and taking special care not to split any literals or names.

A width of 70 chars is recommended.

Definition at line 326 of file vtkWrapText.c.

{
  static struct vtkWPString staticString = { NULL, 0, 0 };
  struct vtkWPString *text;
  size_t i, j, n;
  const char *cp = signature;
  char delim;
  size_t lastSigStart = 0;
  size_t sigCount = 0;

  text = &staticString;
  text->len = 0;

  if (signature == 0)
    {
    return "";
    }

  i = 0;
  j = 0;

  while (cp[i] != '\0')
    {
    while (text->len - j < width && cp[i] != '\n' && cp[i] != '\0')
      {
      /* escape quotes */
      if (cp[i] == '\"' || cp[i] == '\'')
        {
        delim = cp[i];
        vtkWPString_PushChar(text, '\\');
        vtkWPString_PushChar(text, cp[i++]);
        while (cp[i] != delim && cp[i] != '\0')
          {
          if (cp[i] == '\\')
            {
            vtkWPString_PushChar(text, '\\');
            }
          vtkWPString_PushChar(text, cp[i++]);
          }
        if (cp[i] == delim)
          {
          vtkWPString_PushChar(text, '\\');
          vtkWPString_PushChar(text, cp[i++]);
          }
        }
      /* remove items that trail the closing parenthesis */
      else if (cp[i] == ')')
        {
        vtkWPString_PushChar(text, cp[i++]);
        if (strncmp(&cp[i], " const", 6) == 0)
          {
          i += 6;
          }
        if (strncmp(&cp[i], " = 0", 4) == 0)
          {
          i += 4;
          }
        if (cp[i] == ';')
          {
          i++;
          }
        }
      /* anything else */
      else
        {
        vtkWPString_PushChar(text, cp[i++]);
        }
      }

    /* break the line (try to break after a comma) */
    if (cp[i] != '\n' && cp[i] != '\0')
      {
      vtkWPString_BreakSignatureLine(text, &j, 4);
      }
    /* reached end of line: do next signature */
    else
      {
      vtkWPString_Strip(text, " \r\t");
      if (cp[i] != '\0')
        {
        sigCount++;
        /* if sig count is even, check length against maxlen */
        if ((sigCount & 1) == 0)
          {
          n = strlen(text->str);
          if (n >= maxlen)
            {
            break;
            }
          lastSigStart = n;
          }

        i++;
        vtkWPString_PushChar(text, '\\');
        vtkWPString_PushChar(text, 'n');
        }
      /* mark the position of the start of the line */
      j = text->len;
      }
    }

  vtkWPString_Strip(text, " \r\t");

  if (strlen(text->str) >= maxlen)
    {
    /* terminate before the current signature */
    text->str[lastSigStart] = '\0';
    }

  return text->str;
}

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static void vtkWrapText_PythonArraySignature ( struct vtkWPString result,
const char *  classname,
const char *  delims[2],
int  ndim,
const char **  dims 
) [static]

Definition at line 962 of file vtkWrapText.c.

{
  int j, n;

  vtkWPString_Append(result, braces[0]);
  n = (int)strtoul(dims[0], 0, 0);
  if (ndim > 1)
    {
    for (j = 0; j < n; j++)
      {
      if (j != 0) { vtkWPString_Append(result, ", "); }
      vtkWrapText_PythonArraySignature(result, classname,
        braces, ndim-1, dims+1);
      }
    }
  else
    {
    for (j = 0; j < n; j++)
      {
      if (j != 0) { vtkWPString_Append(result, ", "); }
      vtkWPString_Append(result, classname);
      }
    }
  vtkWPString_Append(result, braces[1]);
}

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const char* vtkWrapText_PythonSignature ( FunctionInfo *  currentFunction)

Produce a python signature for a method, for use in documentation.

Definition at line 826 of file vtkWrapText.c.

{
  /* string is intentionally not freed until the program exits */
  static struct vtkWPString staticString = { NULL, 0, 0 };
  struct vtkWPString *result;
  ValueInfo *arg, *ret;
  const char *parens[2] = { "(", ")" };
  const char *braces[2] = { "[", "]" };
  const char **delims;
  int i, n;

  n = vtkWrap_CountWrappedArgs(currentFunction);

  result = &staticString;
  result->len = 0;

  /* print out the name of the method */
  vtkWPString_Append(result, "V.");
  vtkWPString_Append(result, currentFunction->Name);

  /* print the arg list */
  vtkWPString_Append(result, "(");

  for (i = 0; i < n; i++)
    {
    arg = currentFunction->Arguments[i];

    if (i != 0)
      {
      vtkWPString_Append(result, ", ");
      }

    delims = parens;
    if (!vtkWrap_IsConst(arg) &&
        !vtkWrap_IsSetVectorMethod(currentFunction))
      {
      delims = braces;
      }

    vtkWrapText_PythonTypeSignature(result, delims, arg);
    }

  vtkWPString_Append(result, ")");

  /* if this is a void method, we are finished */
  /* otherwise, print "->" and the return type */
  ret = currentFunction->ReturnValue;
  if (ret && (ret->Type & VTK_PARSE_UNQUALIFIED_TYPE) != VTK_PARSE_VOID)
    {
    vtkWPString_Append(result, " -> ");

    vtkWrapText_PythonTypeSignature(result, parens, ret);
    }

  if (currentFunction->Signature)
    {
    vtkWPString_Append(result, "\nC++: ");
    vtkWPString_Append(result, currentFunction->Signature);
    }

  return result->str;
}

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static void vtkWrapText_PythonTypeSignature ( struct vtkWPString result,
const char *  delims[2],
ValueInfo *  arg 
) [static]

Definition at line 890 of file vtkWrapText.c.

{
  char text[32];
  const char *dimension;
  const char *classname = "";

  if (vtkWrap_IsVoid(arg))
    {
    classname = "void";
    }
  else if (vtkWrap_IsObject(arg))
    {
    classname = arg->Class;
    }
  else if (vtkWrap_IsFunction(arg))
    {
    classname = "function";
    }
  else if (vtkWrap_IsString(arg) || vtkWrap_IsCharPointer(arg))
    {
    classname = "string";
    if ((arg->Type & VTK_PARSE_BASE_TYPE) == VTK_PARSE_UNICODE_STRING)
      {
      classname = "unicode";
      }
    }
  else if (vtkWrap_IsChar(arg))
    {
    classname = "char";
    }
  else if (vtkWrap_IsBool(arg))
    {
    classname = "bool";
    }
  else if (vtkWrap_IsRealNumber(arg))
    {
    classname = "float";
    }
  else if (vtkWrap_IsInteger(arg))
    {
    classname = "int";
    }

  if (vtkWrap_IsArray(arg))
    {
    if (arg->CountHint)
      {
      vtkWPString_Append(result, braces[0]);
      vtkWPString_Append(result, classname);
      vtkWPString_Append(result, ", ...");
      vtkWPString_Append(result, braces[1]);
      }
    else
      {
      sprintf(text, "%d", arg->Count);
      dimension = text;
      vtkWrapText_PythonArraySignature(result, classname, braces,
        1, &dimension);
      }
    }
  else if (vtkWrap_IsNArray(arg))
    {
    vtkWrapText_PythonArraySignature(result, classname, braces,
      arg->NumberOfDimensions, arg->Dimensions);
    }
  else
    {
    vtkWPString_Append(result, classname);
    }
}

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const char* vtkWrapText_QuoteString ( const char *  comment,
size_t  maxlen 
)

vtkWrap provides useful functions for generating wrapping code.

Quote a string for inclusion in a C string literal. The "maxlen" should be set to a value between 32 and 2047. Values over 2047 will result in string literals too long for some compilers. If the string is truncated, a "..." will be appended.

Definition at line 29 of file vtkWrapText.c.

{
  static char *result = 0;
  static size_t oldmaxlen = 0;
  size_t i, j, n;

  if (maxlen > oldmaxlen)
    {
    if (result)
      {
      free(result);
      }
    result = (char *)malloc((size_t)(maxlen+1));
    oldmaxlen = maxlen;
    }

  if (comment == NULL)
    {
    return "";
    }

  j = 0;

  n = strlen(comment);
  for (i = 0; i < n; i++)
    {
    if (comment[i] == '\"')
      {
      strcpy(&result[j],"\\\"");
      j += 2;
      }
    else if (comment[i] == '\\')
      {
      strcpy(&result[j],"\\\\");
      j += 2;
      }
    else if (comment[i] == '\n')
      {
      strcpy(&result[j],"\\n");
      j += 2;
      }
    else if ((comment[i] & 0x80) != 0 || isprint(comment[i]))
      {
      // all characters in extended-ASCII set are printable. Some compilers (VS
      // 2010, in debug mode) asserts when isprint() is passed a negative value.
      // Hence, we simply skip the check.
      result[j] = comment[i];
      j++;
      }
    else
      {
      sprintf(&result[j],"\\%3.3o",comment[i]);
      j += 4;
      }
    if (j >= maxlen - 21)
      {
      sprintf(&result[j]," ...\\n [Truncated]\\n");
      j += (int)strlen(" ...\\n [Truncated]\\n");
      break;
      }
    }
  result[j] = '\0';

  return result;
}