Re: [edk2-devel] [PATCH v2] RedfishPkg/RedfishCrtLib: Add more CRT functions

["Abner Chang" <abner.chang@hpe.com>]

Hi Leif,
Have time to review the v2 which was revised according to your comments on v1.
Thanks
Abner

> -----Original Message-----
> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of
> Abner Chang
> Sent: Thursday, January 28, 2021 10:58 AM
> To: devel@edk2.groups.io
> Cc: Wang, Nickle (HPS SW) <nickle.wang@hpe.com>; Leif Lindholm
> <leif@nuviainc.com>; Michael D Kinney <michael.d.kinney@intel.com>
> Subject: [edk2-devel] [PATCH v2] RedfishPkg/RedfishCrtLib: Add more CRT
> functions
> 
> 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@hpe.com>
> 
> Cc: Nickle Wang <nickle.wang@hpe.com>
> Cc: Leif Lindholm <leif@nuviainc.com>
> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> ---
>  .../RedfishCrtLib/RedfishCrtLib.c             | 122 +++++++++++++++++-
>  1 file changed, 121 insertions(+), 1 deletion(-)
> 
> diff --git a/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c
> b/RedfishPkg/PrivateLibrary/RedfishCrtLib/RedfishCrtLib.c
> index 0696341bc0..58ef4f8fdb 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
> +469,77 @@ 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;
> +  }
> +
> +  // 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.
>  **/
> @@ -592,7 +667,52 @@ void qsort (void *base, size_t num, size_t width, int
> (*compare)(const void *, c
> 
>  **/
>  int fgetc(FILE * _File){
> -   return 0;
> +   return EOF;
> +}
> +/**
> +  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 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 EOF;
> +}
> +/**
> +  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 -1;
>  }
>  /**
>    This function check if this is the formating string specifier.
> --
> 2.17.1
> 
> 
> 
> 
>