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#ifndef _NSTRING_H
#define _NSTRING_H
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include "pm_c_util.h"
#include "pm.h" /* For PM_GNU_PRINTF_ATTR, __inline__ */
#ifdef __cplusplus
extern "C" {
#endif
#if 0
} /* to fake out automatic code indenters */
#endif
/* Here are string functions that respect the size of the array
into which you are copying -- E.g. STRSCPY truncates the source string as
required so that it fits, with the terminating null, in the destination
array.
*/
#define STRSCPY(A,B) \
(strncpy((A), (B), sizeof(A)), *((A)+sizeof(A)-1) = '\0')
#define STRSCMP(A,B) \
(strncmp((A), (B), sizeof(A)))
#define STRSCAT(A,B) \
(strncpy(A+strlen(A), B, sizeof(A)-strlen(A)), *((A)+sizeof(A)-1) = '\0')
#define STRSEQ(A, B) \
(strneq((A), (B), sizeof(A)))
#define MEMSZERO(A) \
bzero((A), sizeof(A))
static __inline__ int
streq(const char * const comparand,
const char * const comparator) {
return strcmp(comparand, comparator) == 0;
}
static __inline__ int
strneq(const char * const comparand,
const char * const comparator,
size_t const size) {
return strncmp(comparand, comparator, size) == 0;
}
static __inline__ int
memeq(const void * const comparand,
const void * const comparator,
size_t const size) {
return memcmp(comparand, comparator, size) == 0;
}
/* The Standard C Library may not declare strcasecmp() if the including
source file doesn't request BSD functions, with _BSD_SOURCE. So
we don't define functions that use strcasecmp() in that case.
*/
#ifdef _BSD_SOURCE
static __inline__ int
strcaseeq(const char * const comparand,
const char * const comparator) {
return strcasecmp(comparand, comparator) == 0;
}
static __inline__ int
strncaseeq(const char * const comparand,
const char * const comparator,
size_t const size) {
return strncasecmp(comparand, comparator, size) == 0;
}
#endif
/* The standard C library routines isdigit(), for some weird
historical reason, does not take a character (type 'char') as its
argument. Instead it takes an integer. When the integer is a whole
number, it represents a character in the obvious way using the local
character set encoding. When the integer is negative, the results
are undefined.
Passing a character to isdigit(), which expects an integer, results in
isdigit() sometimes getting a negative number.
On some systems, when the integer is negative, it represents exactly
the character you want it to anyway (e.g. -1 is the character that is
encoded 0xFF). But on others, it does not.
(The same is true of other routines like isdigit()).
Therefore, we have the substitutes for isdigit() etc. that take an
actual character (type 'char') as an argument.
*/
#define ISALNUM(C) (isalnum((unsigned char)(C)))
#define ISALPHA(C) (isalpha((unsigned char)(C)))
#define ISCNTRL(C) (iscntrl((unsigned char)(C)))
#define ISDIGIT(C) (isdigit((unsigned char)(C)))
#define ISGRAPH(C) (isgraph((unsigned char)(C)))
#define ISLOWER(C) (islower((unsigned char)(C)))
#define ISPRINT(C) (isprint((unsigned char)(C)))
#define ISPUNCT(C) (ispunct((unsigned char)(C)))
#define ISSPACE(C) (isspace((unsigned char)(C)))
#define ISUPPER(C) (isupper((unsigned char)(C)))
#define ISXDIGIT(C) (isxdigit((unsigned char)(C)))
#define TOUPPER(C) ((char)toupper((unsigned char)(C)))
/* These are all private versions of commonly available standard C
library subroutines whose names are the same except with the N at
the end. Because not all standard C libraries have them all,
Netpbm must include them in its own libraries, and because some
standard C libraries have some of them, Netpbm must use different
names for them.
The GNU C library has all of them. All but the oldest standard C libraries
have snprintf().
There are slight differences between the asprintf() family and that
found in other libraries:
- There is no return value.
- The returned string is a const char * instead of a char *. The
const is more correct.
- If the function can't get the memory, it returns 'strsol',
which is a string that is in static memory that contains text
indicating an out of memory failure has occurred, intead of
NULL. This makes it much easier for programs to ignore this
possibility.
strfree() is strictly a Netpbm invention, to allow proper type checking
when freeing storage allocated by the Netpbm asprintfN().
*/
extern const char * const strsol;
int
snprintfN(char * const dest,
size_t const str_m,
const char * const fmt,
...) PM_GNU_PRINTF_ATTR(3,4);
void
vsnprintfN(char * const str,
size_t const str_m,
const char * const fmt,
va_list ap,
size_t * const sizeP);
void
asprintfN(const char ** const resultP,
const char * const fmt,
...) PM_GNU_PRINTF_ATTR(2,3);
void
vasprintfN(const char ** const resultP,
const char * const format,
va_list args);
void
strfree(const char * const string);
const char *
strsepN(char ** const stringP, const char * const delim);
int
stripeq(const char * const comparand,
const char * const comparator);
const void *
memmemN(const void * const haystackArg,
size_t const haystacklen,
const void * const needleArg,
size_t const needlelen);
bool
strishex(const char * const subject);
#ifdef __cplusplus
}
#endif
#endif
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