static void read_numeric(lexer_state *ls, token_info *info) { int seen_dot = 0; for(;;) { if(ls->current == '.') { if(seen_dot) break; seen_dot = 1; } else if(!lisdigit(ls->current)) { // bad number if(lisalpha(ls->current)) { while(lisalnum(ls->current)) save_and_next(ls); lexer_error(ls, "badly formatted number"); } // end of number break; } save_and_next(ls); } long double number = strtold(ls->buf->buf, NULL); info->string = strdup(ls->buf->buf); info->number = number; }
static int read_id_or_reserved(lexer_state *ls, token_info *info) { while(lisalnum(ls->current)) save_and_next(ls); // check for reserved words for(int i = 0; i < NUM_TOK; ++i) { if(!strcmp(ls->buf->buf, tokens[i])) return FIRST_TOK + i; } // not a reserved word, must be an id info->string = strdup(ls->buf->buf); return TK_ID; }
long strtol(const char *str, char **nptr, int base) { long val; int c; int xx, neg = 0; long multmin; long limit; const char **ptr = (const char **)nptr; const unsigned char *ustr = (const unsigned char *)str; if (ptr != (const char **)0) *ptr = (char *)ustr; /* in case no number is formed */ if (base < 0 || base > MBASE || base == 1) { errno = EINVAL; return (0); /* base is invalid -- should be a fatal error */ } if (!isalnum(c = *ustr)) { while (isspace(c)) c = *++ustr; switch (c) { case '-': neg++; /* FALLTHROUGH */ case '+': c = *++ustr; } } if (base == 0) if (c != '0') base = 10; else if (ustr[1] == 'x' || ustr[1] == 'X') base = 16; else base = 8; /* * for any base > 10, the digits incrementally following * 9 are assumed to be "abc...z" or "ABC...Z" */ if (!lisalnum(c) || (xx = DIGIT(c)) >= base) return (0); /* no number formed */ if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && isxdigit(ustr[2])) c = *(ustr += 2); /* skip over leading "0x" or "0X" */ /* this code assumes that abs(LONG_MIN) >= abs(LONG_MAX) */ if (neg) limit = LONG_MIN; else limit = -LONG_MAX; multmin = limit / (long)base; val = -DIGIT(c); for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { /* accumulate neg avoids surprises near MAXLONG */ if (val < multmin) goto overflow; val *= base; if (val < limit + xx) goto overflow; val -= xx; c = *++ustr; } if (ptr != (const char **)0) *ptr = (char *)ustr; return (neg ? val : -val); overflow: for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) ; if (ptr != (const char **)0) *ptr = (char *)ustr; errno = ERANGE; return (neg ? LONG_MIN : LONG_MAX); }
/* All Rights Reserved */ #if defined(_KERNEL) && !defined(_BOOT) #include <sys/errno.h> #else /* _KERNEL && !_BOOT */ #if !defined(_BOOT) && !defined(_KMDB) #include "lint.h" #endif /* !_BOOT && !_KMDB */ #include <errno.h> #include <ctype.h> #include <limits.h> #include <stdlib.h> #endif /* _KERNEL && !_BOOT */ #include "strtolctype.h" #include <sys/types.h> #if defined(_KERNEL) && !defined(_BOOT) int ddi_strtoull(const char *str, char **nptr, int base, u_longlong_t *result) #else /* _KERNEL && !_BOOT */ u_longlong_t strtoull(const char *str, char **nptr, int base) #endif /* _KERNEL && !_BOOT */ { u_longlong_t val; int c; int xx; int neg = 0; u_longlong_t multmax; const char **ptr = (const char **)nptr; const unsigned char *ustr = (const unsigned char *)str; if (ptr != (const char **)0) *ptr = (char *)ustr; /* in case no number is formed */ if (base < 0 || base > MBASE || base == 1) { /* base is invalid -- should be a fatal error */ #if defined(_KERNEL) && !defined(_BOOT) return (EINVAL); #else /* _KERNEL && !_BOOT */ errno = EINVAL; return (0); #endif /* _KERNEL && !_BOOT */ } if (!isalnum(c = *ustr)) { while (isspace(c)) c = *++ustr; switch (c) { case '-': neg++; /* FALLTHROUGH */ case '+': c = *++ustr; } } if (base == 0) if (c != '0') base = 10; else if (ustr[1] == 'x' || ustr[1] == 'X') base = 16; else base = 8; /* * for any base > 10, the digits incrementally following * 9 are assumed to be "abc...z" or "ABC...Z" */ if (!lisalnum(c) || (xx = DIGIT(c)) >= base) { /* no number formed */ #if defined(_KERNEL) && !defined(_BOOT) return (EINVAL); #else /* _KERNEL && !_BOOT */ return (0); #endif /* _KERNEL && !_BOOT */ } if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && isxdigit(ustr[2])) c = *(ustr += 2); /* skip over leading "0x" or "0X" */ multmax = ULLONG_MAX / (u_longlong_t)base; val = DIGIT(c); for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { if (val > multmax) goto overflow; val *= base; if (ULLONG_MAX - val < xx) goto overflow; val += xx; c = *++ustr; } if (ptr != (const char **)0) *ptr = (char *)ustr; #if defined(_KERNEL) && !defined(_BOOT) *result = neg ? -val : val; return (0); #else /* _KERNEL && !_BOOT */ return (neg ? -val : val); #endif /* _KERNEL && !_BOOT */ overflow: for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) ; if (ptr != (const char **)0) *ptr = (char *)ustr; #if defined(_KERNEL) && !defined(_BOOT) return (ERANGE); #else /* _KERNEL && !_BOOT */ errno = ERANGE; return (ULLONG_MAX); #endif /* _KERNEL && !_BOOT */ }