[edk2-devel] [PATCH] RedfishPkg/RedfishCrtLib: Add more CRT functions

[Leif Lindholm]

On Mon, Jan 25, 2021 at 12:36:53 +0800, Abner Chang wrote:
> Add more functions which were missed in the first time commit,
> that causes the build error with EDK2 Redfish feature driver.
> 
> strerror - We don't support this on edk2 environment.
> strpbrk  - Cloned this function from edk2-LibC
> File operation functions - Not supported on edk2 environment.
> 
> Signed-off-by: Abner Chang <abner.chang at hpe.com>
> 
> Cc: Nickle Wang <nickle.wang at hpe.com>
> Cc: Leif Lindholm <leif at nuviainc.com>
> Cc: Michael D Kinney <michael.d.kinney at intel.com>
> ---
>  .../RedfishCrtLib/RedfishCrtLib.c             | 119 ++++++++++++++++++
>  1 file changed, 119 insertions(+)
> 
> diff --git a/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c b/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c
> index 0696341bc0..c64f14534c 100644
> --- a/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c
> +++ b/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c
> @@ -15,6 +15,10 @@
>  #include <Library/UefiRuntimeServicesTableLib.h>
>  
>  int  errno = 0;
> +char errnum_message [] = "We don't support to map errnum to the error message on edk2 Redfish\n";
> +
> +// This is required to keep VC++ happy if you use floating-point
> +int _fltused  = 1;
>  
>  /**
>    Determine if a particular character is an alphanumeric character
> @@ -465,6 +469,76 @@ strtod (const char * __restrict nptr, char ** __restrict endptr) {
>      return (double)0;
>  }
>  
> +static UINT8  BitMask[] = {
> +  0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80
> +  };
> +
> +#define WHICH8(c)     ((unsigned char)(c) >> 3)
> +#define WHICH_BIT(c)  (BitMask[((c) & 0x7)])
> +#define BITMAP64      ((UINT64 *)bitmap)
> +
> +static
> +void
> +BuildBitmap(unsigned char * bitmap, const char *s2, int n)
> +{
> +  unsigned char bit;
> +  int           index;
> +
> +  // Initialize bitmap.  Bit 0 is always 1 which corresponds to '\0'
> +  for (BITMAP64[0] = index = 1; index < n; index++)
> +    BITMAP64[index] = 0;

Please use {}.

> +
> +  // Set bits in bitmap corresponding to the characters in s2
> +  for (; *s2 != '\0'; s2++) {
> +    index = WHICH8(*s2);
> +    bit = WHICH_BIT(*s2);
> +    bitmap[index] = bitmap[index] | bit;
> +  }
> +}
> +
> +/** The strpbrk function locates the first occurrence in the string pointed to
> +    by s1 of any character from the string pointed to by s2.
> +
> +    @return   The strpbrk function returns a pointer to the character, or a
> +              null pointer if no character from s2 occurs in s1.
> +**/
> +char *
> +strpbrk(const char *s1, const char *s2)
> +{
> +  UINT8 bitmap[ (((UCHAR_MAX + 1) / CHAR_BIT) + (CHAR_BIT - 1)) & ~7U];
> +  UINT8 bit;
> +  int index;
> +
> +  BuildBitmap( bitmap, s2, sizeof(bitmap) / sizeof(UINT64));
> +
> +  for( ; *s1 != '\0'; ++s1) {
> +    index = WHICH8(*s1);
> +    bit = WHICH_BIT(*s1);
> +    if( (bitmap[index] & bit) != 0) {
> +      return (char *)s1;
> +    }
> +  }
> +  return NULL;
> +}
> +
> +/** The strerror function maps the number in errnum to a message string.
> +    Typically, the values for errnum come from errno, but strerror shall map
> +    any value of type int to a message.
> +
> +    The implementation shall behave as if no library function calls the
> +    strerror function.
> +
> +    @return   The strerror function returns a pointer to the string, the
> +              contents of which are locale specific.  The array pointed to
> +              shall not be modified by the program, but may be overwritten by
> +              a subsequent call to the strerror function.
> +**/
> +char *
> +strerror(int errnum)
> +{
> +  return errnum_message;
> +}
> +
>  /**
>    Allocate and zero-initialize array.
>  **/
> @@ -594,6 +668,51 @@ void qsort (void *base, size_t num, size_t width, int (*compare)(const void *, c
>  int fgetc(FILE * _File){
>     return 0;
>  }
> +/**
> +  Open stream file, we don't support file operastion on edk2 JSON library.
> +
> +  @return 0 Unsupported
> +
> +**/
> +FILE *fopen (const char *filename, const char *mode) {
> +  return 0;

NULL.

> +}
> +/**
> +  Read stream from file, we don't support file operastion on edk2 JSON library.
> +
> +  @return 0 Unsupported
> +
> +**/
> +size_t fread (void * ptr, size_t size, size_t count, FILE * stream) {
> +  return 0;
> +}
> +/**
> +  Write stream from file, we don't support file operastion on edk2 JSON library.
> +
> +  @return 0 Unsupported
> +
> +**/
> +size_t fwrite (const void * ptr, size_t size, size_t count, FILE * stream) {
> +  return 0;
> +}
> +/**
> +  Close file, we don't support file operastion on edk2 JSON library.
> +
> +  @return 0 Unsupported
> +
> +**/
> +int fclose (FILE * stream) {
> +  return 0;

0 indicated success. EOF should be returned otherwise.

> +}
> +/**
> +  Write the formatted string to file, we don't support file operastion on edk2 JSON library.
> +
> +  @return 0 Unsupported
> +
> +**/
> +int fprintf (FILE * stream, const char * format, ...) {
> +  return 0;

>From my linux manpage:
"If an output error is encountered, a negative value is returned."

/
    Leif

> +}
>  /**
>    This function check if this is the formating string specifier.
>  
> -- 
> 2.17.1
> 


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