NS_CStringInsertData 编辑

« XPCOM API Reference

Summary

The NS_CStringInsertData function appends data to the existing value of a nsACString instance. This is a low-level API.

  #include "nsStringAPI.h"

  nsresult NS_CStringInsertData(
    nsACString& aString,
    PRUint32 aOffset,
    const char* aData,
    PRUint32 aDataLength = PR_UINT32_MAX
  );

Parameters

aString

[in] A nsACString instance to be modified.

aOffset

[in] An offset into the string's internal buffer specifying where to place the given characters.

aData

[in] A raw character array to copy into this string.

aDataLength

[in] The length of aData, measured in storage units. If equal to PR_UINT32_MAX, then aData is assumed to be null-terminated. Otherwise, aData need not be null terminated.

Return Values

The NS_CStringInsertData function returns NS_OK if successful. Otherwise, it returns an error code.

Remarks

This function is defined inline as a wrapper around NS_CStringSetDataRange.

Example Code

  nsCStringContainer str;
  NS_CStringContainerInit(str);
  NS_CStringSetData(str, "hello");

  NS_CStringInsertData(str, 5, " world");

  const char* data;
  NS_CStringGetData(str, &data);
  printf("%s\n", data); // prints out "hello world"

  NS_CStringContainerFinish(str);

History

This function was frozen for Mozilla 1.7. See bug 239123 for details.

See Also

NS_CStringSetDataRange, nsACString, nsACString