/*
* misc.c -- Miscellaneous routines.
*
* Copyright (c) GoAhead Software Inc., 1995-2000. All Rights Reserved.
*
* See the file "license.txt" for usage and redistribution license requirements
*/
/********************************* Includes ***********************************/
#if UEMF
#include "uemf.h"
#else
#include "basic/basicInternal.h"
#endif
/********************************* Defines ************************************/
/*
* Sprintf buffer structure. Make the increment 64 so that
* a balloc can use a 64 byte block.
*/
#define STR_REALLOC 0x1 /* Reallocate the buffer as required */
#define STR_INC 64 /* Growth increment */
typedef struct {
char_t *s; /* Pointer to buffer */
int size; /* Current buffer size */
int max; /* Maximum buffer size */
int count; /* Buffer count */
int flags; /* Allocation flags */
} strbuf_t;
/*
* Sprintf formatting flags
*/
enum flag {
flag_none = 0,
flag_minus = 1,
flag_plus = 2,
flag_space = 4,
flag_hash = 8,
flag_zero = 16,
flag_short = 32,
flag_long = 64
};
/************************** Forward Declarations ******************************/
static int dsnprintf(char_t **s, int size, char_t *fmt, va_list arg,
int msize);
static void put_char(strbuf_t *buf, char_t c);
static void put_string(strbuf_t *buf, char_t *s, int len,
int width, int prec, enum flag f);
static void put_ulong(strbuf_t *buf, unsigned long int value, int base,
int upper, char_t *prefix, int width, int prec, enum flag f);
/************************************ Code ************************************/
/*
* "basename" returns a pointer to the last component of a pathname
* LINUX and LynxOS have their own basename function
*/
#if ! LINUX && ! LYNX && ! __rtems__
char_t *basename(char_t *name)
{
char_t *cp;
#if NW || WIN
if (((cp = gstrrchr(name, '\\')) == NULL) &&
((cp = gstrrchr(name, '/')) == NULL)) {
return name;
#else
if ((cp = gstrrchr(name, '/')) == NULL) {
return name;
#endif
} else if (*(cp + 1) == '\0' && cp == name) {
return name;
} else if (*(cp + 1) == '\0' && cp != name) {
return T("");
} else {
return ++cp;
}
}
#endif /* ! LINUX & ! LYNX */
/******************************************************************************/
/*
* Returns a pointer to the directory component of a pathname. bufsize is
* the size of the buffer in BYTES!
*/
char_t *dirname(char_t *buf, char_t *name, int bufsize)
{
char_t *cp;
int len;
a_assert(name);
a_assert(buf);
a_assert(bufsize > 0);
#if WIN || NW
if ((cp = gstrrchr(name, '/')) == NULL &&
(cp = gstrrchr(name, '\\')) == NULL)
#else
if ((cp = gstrrchr(name, '/')) == NULL)
#endif
{
gstrcpy(buf, T("."));
return buf;
}
if ((*(cp + 1) == '\0' && cp == name)) {
gstrncpy(buf, T("."), TSZ(bufsize));
gstrcpy(buf, T("."));
return buf;
}
len = cp - name;
if (len < bufsize) {
gstrncpy(buf, name, len);
buf[len] = '\0';
} else {
gstrncpy(buf, name, TSZ(bufsize));
buf[bufsize - 1] = '\0';
}
return buf;
}
/******************************************************************************/
/*
* sprintf and vsprintf are bad, ok. You can easily clobber memory. Use
* fmtAlloc and fmtValloc instead! These functions do _not_ support floating
* point, like %e, %f, %g...
*/
int fmtAlloc(char_t **s, int n, char_t *fmt, ...)
{
va_list ap;
int result;
a_assert(s);
a_assert(fmt);
*s = NULL;
va_start(ap, fmt);
result = dsnprintf(s, n, fmt, ap, 0);
va_end(ap);
return result;
}
/******************************************************************************/
/*
* Support a static buffer version for small buffers only!
*/
int fmtStatic(char_t *s, int n, char_t *fmt, ...)
{
va_list ap;
int result;
a_assert(s);
a_assert(fmt);
a_assert(n <= 256);
if (n <= 0) {
return -1;
}
va_start(ap, fmt);
result = dsnprintf(&s, n, fmt, ap, 0);
va_end(ap);
return result;
}
/******************************************************************************/
/*
* This function appends the formatted string to the supplied string,
* reallocing if required.
*/
int fmtRealloc(char_t **s, int n, int msize, char_t *fmt, ...)
{
va_list ap;
int result;
a_assert(s);
a_assert(fmt);
if (msize == -1) {
*s = NULL;
}
va_start(ap, fmt);
result = dsnprintf(s, n, fmt, ap, msize);
va_end(ap);
return result;
}
/******************************************************************************/
/*
* A vsprintf replacement.
*/
int fmtValloc(char_t **s, int n, char_t *fmt, va_list arg)
{
a_assert(s);
a_assert(fmt);
*s = NULL;
return dsnprintf(s, n, fmt, arg, 0);
}
/******************************************************************************/
/*
* Dynamic sprintf implementation. Supports dynamic buffer allocation.
* This function can be called multiple times to grow an existing allocated
* buffer. In this case, msize is set to the size of the previously allocated
* buffer. The buffer will be realloced, as required. If msize is set, we
* return the size of the allocated buffer for use with the next call. For
* the first call, msize can be set to -1.
*/
static int dsnprintf(char_t **s, int size, char_t *fmt, va_list arg, int msize)
{
strbuf_t buf;
char_t c;
a_assert(s);
a_assert(fmt);
memset(&buf, 0, sizeof(buf));
buf.s = *s;
if (*s == NULL || msize != 0) {
buf.max = size;
buf.flags |= STR_REALLOC;
if (msize != 0) {
buf.size = max(msize, 0);
}
if (*s != NULL && msize != 0) {
buf.count = gstrlen(*s);
}
} else {
buf.size = size;
}
while ((c = *fmt++) != '\0') {
if (c != '%' || (c = *fmt++) == '%') {
put_char(&buf, c);
} else {
enum flag f = flag_none;
int width = 0;
int prec = -1;
for ( ; c != '\0'; c = *fmt++) {
if (c == '-') {
f |= flag_minus;
} else if (c == '+') {
f |= flag_plus;
} else if (c == ' ') {
f |= flag_space;
} else if (c == '#') {
f |= flag_hash;
} else if (c == '0') {
f |= flag_zero;
} else {
break;
}
}
if (c == '*') {
width = va_arg(arg, int);
if (width < 0) {
f |= flag_minus;
width = -width;
}
c = *fmt++;
} else {
for ( ; gisdigit((int)c); c = *fmt++) {
width = width * 10 + (c - '0');
}
}
if (c == '.') {
f &= ~flag_zero;
c = *fmt++;
if (c == '*') {
prec = va_arg(arg, int);
c = *fmt++;
} else {
for (prec = 0; gisdigit((int)c); c = *fmt++) {
prec = prec * 10 + (c - '0');
}
}
}
if (c == 'h' || c == 'l') {
f |= (c == 'h' ? flag_short : flag_long);
c = *fmt++;
}
if (c == 'd' || c == 'i') {
long int value;
if (f & flag_short) {
value = (short int) va_arg(arg, int);
} else if (f & flag_long) {
value = va_arg(arg, long int);
} else {
value = va_arg(arg, int);
}
if (value >= 0) {
if (f & flag_plus) {
put_ulong(&buf, value, 10, 0, T("+"), width, prec, f);
} else if (f & flag_space) {
put_ulong(&buf, value, 10, 0, T(" "), width, prec, f);
} else {
put_ulong(&buf, value, 10, 0, NULL, width, prec, f);
}
} else {
put_ulong(&buf, -value, 10, 0, T("-"), width, prec, f);
}
} else if (c == 'o' || c == 'u' || c == 'x' || c == 'X') {
unsigned long int value;
if (f & flag_short) {
value = (unsigned short int) va_arg(arg, unsigned int);
} else if (f & flag_long) {
value = va_arg(arg, unsigned long int);
} else {
value = va_arg(arg, unsigned int);
}
if (c == 'o') {
if (f & flag_hash && value != 0) {
put_ulong(&buf, value, 8, 0, T("0"), width, prec, f);
} else {
put_ulong(&buf, value, 8, 0, NULL, width, prec, f);
}
} else if (c == 'u') {
put_ulong(&buf, value, 10, 0, NULL, width, prec, f);
} else {
if (f & flag_hash && value != 0) {
if (c == 'x') {
put_ulong(&buf, value, 16, 0, T("0x"), width,
prec, f);
} else {
put_ulong(&buf, value, 16, 1, T("0X"), width,
prec, f);
}
} else {
put_ulong(&buf, value, 16, 0, NULL, width, prec, f);
}
}
} else if (c == 'c') {
char_t value = va_arg(arg, int);
put_char(&buf, value);
} else if (c == 's' || c == 'S') {
char_t *value = va_arg(arg, char_t *);
if (value == NULL) {
put_string(&buf, T("(null)"), -1, width, prec, f);
} else if (f & flag_hash) {
put_string(&buf,
value + 1, (char_t) *value, width, prec, f);
} else {
put_string(&buf, value, -1, width, prec, f);
}
} else if (c == 'p') {
void *value = va_arg(arg, void *);
put_ulong(&buf,
(unsigned long int) value, 16, 0, T("0x"), width, prec, f);
} else if (c == 'n') {
if (f & flag_short) {
short int *value = va_arg(arg, short int *);
*value = buf.count;
} else if (f & flag_long) {
long int *value = va_arg(arg, long int *);
*value = buf.count;
} else {
int *value = va_arg(arg, int *);
*value = buf.count;
}
} else {
put_char(&buf, c);
}
}
}
if (buf.s == NULL) {
put_char(&buf, '\0');
}
/*
* If the user requested a dynamic buffer (*s == NULL), ensure it is returned.
*/
if (*s == NULL || msize != 0) {
*s = buf.s;
}
if (*s != NULL && size > 0) {
if (buf.count < size) {
(*s)[buf.count] = '\0';
} else {
(*s)[buf.size - 1] = '\0';
}
}
if (msize != 0) {
return buf.size;
}
return buf.count;
}
/******************************************************************************/
/*
* Add a character to a string buffer
*/
static void put_char(strbuf_t *buf, char_t c)
{
if (buf->count >= (buf->size - 1)) {
if (! (buf->flags & STR_REALLOC)) {
return;
}
buf->size += STR_INC;
if (buf->size > buf->max && buf->size > STR_INC) {
/*
* Caller should increase the size of the calling buffer
*/
buf->size -= STR_INC;
return;
}
if (buf->s == NULL) {
buf->s = balloc(B_L, buf->size * sizeof(char_t));
} else {
buf->s = brealloc(B_L, buf->s, buf->size * sizeof(char_t));
}
}
buf->s[buf->count] = c;
if (c != '\0') {
++buf->count;
}
}
/******************************************************************************/
/*
* Add a string to a string buffer
*/
static void put_string(strbuf_t *buf, char_t *s, int len, int width,
int prec, enum flag f)
{
int i;
if (len < 0) {
len = strnlen(s, prec >= 0 ? prec : ULONG_MAX);
} else if (prec >= 0 && prec < len) {
len = prec;
}
if (width > len && !(f & flag_minus)) {
for (i = len; i < width; ++i) {
put_char(buf, ' ');
}
}
for (i = 0; i < len; ++i) {
put_char(buf, s[i]);
}
if (width > len && f & flag_minus) {
for (i = len; i < width; ++i) {
put_char(buf, ' ');
}
}
}
/******************************************************************************/
/*
* Add a long to a string buffer
*/
static void put_ulong(strbuf_t *buf, unsigned long int value, int base,
int upper, char_t *prefix, int width, int prec, enum flag f)
{
unsigned long x, x2;
int len, zeros, i;
for (len = 1, x = 1; x < ULONG_MAX / base; ++len, x = x2) {
x2 = x * base;
if (x2 > value) {
break;
}
}
zeros = (prec > len) ? prec - len : 0;
width -= zeros + len;
if (prefix != NULL) {
width -= strnlen(prefix, ULONG_MAX);
}
if (!(f & flag_minus)) {
if (f & flag_zero) {
for (i = 0; i < width; ++i) {
put_char(buf, '0');
}
} else {
for (i = 0; i < width; ++i) {
put_char(buf, ' ');
}
}
}
if (prefix != NULL) {
put_string(buf, prefix, -1, 0, -1, flag_none);
}
for (i = 0; i < zeros; ++i) {
put_char(buf, '0');
}
for ( ; x > 0; x /= base) {
int digit = (value / x) % base;
put_char(buf, (char) ((digit < 10 ? '0' : (upper ? 'A' : 'a') - 10) +
digit));
}
if (f & flag_minus) {
for (i = 0; i < width; ++i) {
put_char(buf, ' ');
}
}
}
/******************************************************************************/
/*
* Convert an ansi string to a unicode string. On an error, we return the
* original ansi string which is better than returning NULL. nBytes is the
* size of the destination buffer (ubuf) in _bytes_.
*/
char_t *ascToUni(char_t *ubuf, char *str, int nBytes)
{
#if UNICODE
if (MultiByteToWideChar(CP_ACP, 0, str, nBytes / sizeof(char_t), ubuf,
nBytes / sizeof(char_t)) < 0) {
return (char_t*) str;
}
#else
memcpy(ubuf, str, nBytes);
#endif
return ubuf;
}
/******************************************************************************/
/*
* Convert a unicode string to an ansi string. On an error, return the
* original unicode string which is better than returning NULL.
* N.B. nBytes is the number of _bytes_ in the destination buffer, buf.
*/
char *uniToAsc(char *buf, char_t *ustr, int nBytes)
{
#if UNICODE
if (WideCharToMultiByte(CP_ACP, 0, ustr, nBytes, buf, nBytes, NULL,
NULL) < 0) {
return (char*) ustr;
}
#else
memcpy(buf, ustr, nBytes);
#endif
return (char*) buf;
}
/******************************************************************************/
/*
* allocate (balloc) a buffer and do ascii to unicode conversion into it.
* cp points to the ascii buffer. alen is the length of the buffer to be
* converted not including a terminating NULL. Return a pointer to the
* unicode buffer which must be bfree'd later. Return NULL on failure to
* get buffer. The buffer returned is NULL terminated.
*/
char_t *ballocAscToUni(char *cp, int alen)
{
char_t *unip;
int ulen;
ulen = (alen + 1) * sizeof(char_t);
if ((unip = balloc(B_L, ulen)) == NULL) {
return NULL;
}
ascToUni(unip, cp, ulen);
unip[alen] = 0;
return unip;
}
/******************************************************************************/
/*
* allocate (balloc) a buffer and do unicode to ascii conversion into it.
* unip points to the unicoded string. ulen is the number of characters
* in the unicode string not including a teminating null. Return a pointer
* to the ascii buffer which must be bfree'd later. Return NULL on failure
* to get buffer. The buffer returned is NULL terminated.
*/
char *ballocUniToAsc(char_t *unip, int ulen)
{
char * cp;
if ((cp = balloc(B_L, ulen+1)) == NULL) {
return NULL;
}
uniToAsc(cp, unip, ulen);
cp[ulen] = '\0';
return cp;
}
/******************************************************************************/
/*
* convert a hex string to an integer. The end of the string or a non-hex
* character will indicate the end of the hex specification.
*/
unsigned int hextoi(char_t *hexstring)
{
register char_t *h;
register unsigned int c, v;
v = 0;
h = hexstring;
if (*h == '0' && (*(h+1) == 'x' || *(h+1) == 'X')) {
h += 2;
}
while ((c = (unsigned int)*h++) != 0) {
if (c >= '0' && c <= '9') {
c -= '0';
} else if (c >= 'a' && c <= 'f') {
c = (c - 'a') + 10;
} else if (c >= 'A' && c <= 'F') {
c = (c - 'A') + 10;
} else {
break;
}
v = (v * 0x10) + c;
}
return v;
}
/******************************************************************************/
/*
* convert a string to an integer. If the string starts with "0x" or "0X"
* a hexidecimal conversion is done.
*/
unsigned int gstrtoi(char_t *s)
{
if (*s == '0' && (*(s+1) == 'x' || *(s+1) == 'X')) {
s += 2;
return hextoi(s);
}
return gatoi(s);
}
/******************************************************************************/
