/* * 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 int strnlen(char_t *s, unsigned int n); 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; } /******************************************************************************/ /* * Return the length of a string limited by a given length */ static int strnlen(char_t *s, unsigned int n) { unsigned int len; len = gstrlen(s); return min(len, n); } /******************************************************************************/ /* * 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); } /******************************************************************************/