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-rw-r--r--libc/stdio/vfprintf.cpp667
1 files changed, 2 insertions, 665 deletions
diff --git a/libc/stdio/vfprintf.cpp b/libc/stdio/vfprintf.cpp
index fe2e338e7..a60b862ba 100644
--- a/libc/stdio/vfprintf.cpp
+++ b/libc/stdio/vfprintf.cpp
@@ -33,59 +33,7 @@
#define CHAR_TYPE char
#define FUNCTION_NAME __vfprintf
-
-#include <sys/mman.h>
-#include <sys/types.h>
-
-#include <errno.h>
-#include <float.h>
-#include <langinfo.h>
-#include <limits.h>
-#include <locale.h>
-#include <math.h>
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <wchar.h>
-
-#include "fvwrite.h"
-#include "gdtoa.h"
-#include "local.h"
-
-union arg {
- int intarg;
- unsigned int uintarg;
- long longarg;
- unsigned long ulongarg;
- long long longlongarg;
- unsigned long long ulonglongarg;
- ptrdiff_t ptrdiffarg;
- size_t sizearg;
- ssize_t ssizearg;
- intmax_t intmaxarg;
- uintmax_t uintmaxarg;
- void* pvoidarg;
- char* pchararg;
- signed char* pschararg;
- short* pshortarg;
- int* pintarg;
- long* plongarg;
- long long* plonglongarg;
- ptrdiff_t* pptrdiffarg;
- ssize_t* pssizearg;
- intmax_t* pintmaxarg;
- double doublearg;
- long double longdoublearg;
- wint_t wintarg;
- wchar_t* pwchararg;
-};
-
-static int __find_arguments(const CHAR_TYPE* fmt0, va_list ap, union arg** argtable, size_t* argtablesiz);
-static int __grow_type_table(unsigned char** typetable, int* tablesize);
+#include "printf_common.h"
/*
* Flush out all the vectors defined by the given uio,
@@ -105,35 +53,6 @@ static int __sprint(FILE* fp, struct __suio* uio) {
}
/*
- * Helper function for `fprintf to unbuffered unix file': creates a
- * temporary buffer. We only work on write-only files; this avoids
- * worries about ungetc buffers and so forth.
- */
-static int __sbprintf(FILE* fp, const CHAR_TYPE* fmt, va_list ap) {
- FILE fake;
- struct __sfileext fakeext;
- unsigned char buf[BUFSIZ];
-
- _FILEEXT_SETUP(&fake, &fakeext);
- /* copy the important variables */
- fake._flags = fp->_flags & ~__SNBF;
- fake._file = fp->_file;
- fake._cookie = fp->_cookie;
- fake._write = fp->_write;
-
- /* set up the buffer */
- fake._bf._base = fake._p = buf;
- fake._bf._size = fake._w = sizeof(buf);
- fake._lbfsize = 0; /* not actually used, but Just In Case */
-
- /* do the work, then copy any error status */
- int ret = FUNCTION_NAME(&fake, fmt, ap);
- if (ret >= 0 && __sflush(&fake)) ret = EOF;
- if (fake._flags & __SERR) fp->_flags |= __SERR;
- return (ret);
-}
-
-/*
* Convert a wide character string argument for the %ls format to a multibyte
* string representation. If not -1, prec specifies the maximum number of
* bytes to output, and also means that we can't assume that the wide char
@@ -185,72 +104,7 @@ static char* __wcsconv(wchar_t* wcsarg, int prec) {
return (convbuf);
}
-#define DEFPREC 6
-
-#define to_digit(c) ((c) - '0')
-#define is_digit(c) ((unsigned)to_digit(c) <= 9)
-#define to_char(n) ((CHAR_TYPE)((n) + '0'))
-
-template <typename CharT>
-static int exponent(CharT* p0, int exp, int fmtch) {
- CharT* p = p0;
- *p++ = fmtch;
- if (exp < 0) {
- exp = -exp;
- *p++ = '-';
- } else {
- *p++ = '+';
- }
-
- CharT expbuf[MAXEXPDIG];
- CharT* t = expbuf + MAXEXPDIG;
- if (exp > 9) {
- do {
- *--t = to_char(exp % 10);
- } while ((exp /= 10) > 9);
- *--t = to_char(exp);
- for (; t < expbuf + MAXEXPDIG; *p++ = *t++) /* nothing */;
- } else {
- /*
- * Exponents for decimal floating point conversions
- * (%[eEgG]) must be at least two characters long,
- * whereas exponents for hexadecimal conversions can
- * be only one character long.
- */
- if (fmtch == 'e' || fmtch == 'E') *p++ = '0';
- *p++ = to_char(exp);
- }
- return (p - p0);
-}
-
-/*
- * The size of the buffer we use as scratch space for integer
- * conversions, among other things. Technically, we would need the
- * most space for base 10 conversions with thousands' grouping
- * characters between each pair of digits. 100 bytes is a
- * conservative overestimate even for a 128-bit uintmax_t.
- */
-#define BUF 100
-
-#define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */
-
-/*
- * Flags used during conversion.
- */
-#define ALT 0x0001 /* alternate form */
-#define LADJUST 0x0004 /* left adjustment */
-#define LONGDBL 0x0008 /* long double */
-#define LONGINT 0x0010 /* long integer */
-#define LLONGINT 0x0020 /* long long integer */
-#define SHORTINT 0x0040 /* short integer */
-#define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */
-#define FPT 0x0100 /* Floating point number */
-#define PTRINT 0x0200 /* (unsigned) ptrdiff_t */
-#define SIZEINT 0x0400 /* (signed) size_t */
-#define CHARINT 0x0800 /* 8 bit integer */
-#define MAXINT 0x1000 /* largest integer size (intmax_t) */
-
-int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, __va_list ap) {
+int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
int ch; /* character from fmt */
int n, n2; /* handy integers (short term usage) */
CHAR_TYPE* cp; /* handy char pointer (short term usage) */
@@ -337,23 +191,6 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, __va_list ap) {
iovp = iov; \
} \
} while (0)
-#define PAD(howmany, with) \
- do { \
- if ((n = (howmany)) > 0) { \
- while (n > PADSIZE) { \
- PRINT(with, PADSIZE); \
- n -= PADSIZE; \
- } \
- PRINT(with, n); \
- } \
- } while (0)
-#define PRINTANDPAD(p, ep, len, with) \
- do { \
- n2 = (ep) - (p); \
- if (n2 > (len)) n2 = (len); \
- if (n2 > 0) PRINT((p), n2); \
- PAD((len) - (n2 > 0 ? n2 : 0), (with)); \
- } while (0)
#define FLUSH() \
do { \
if (uio.uio_resid && __sprint(fp, &uio)) goto error; \
@@ -361,87 +198,6 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, __va_list ap) {
iovp = iov; \
} while (0)
- /*
- * To extend shorts properly, we need both signed and unsigned
- * argument extraction methods.
- */
-#define SARG() \
- ((intmax_t)(flags & MAXINT \
- ? GETARG(intmax_t) \
- : flags & LLONGINT \
- ? GETARG(long long) \
- : flags & LONGINT \
- ? GETARG(long) \
- : flags & PTRINT \
- ? GETARG(ptrdiff_t) \
- : flags & SIZEINT \
- ? GETARG(ssize_t) \
- : flags & SHORTINT \
- ? (short)GETARG(int) \
- : flags & CHARINT ? (signed char)GETARG(int) \
- : GETARG(int)))
-#define UARG() \
- ((uintmax_t)(flags & MAXINT \
- ? GETARG(uintmax_t) \
- : flags & LLONGINT \
- ? GETARG(unsigned long long) \
- : flags & LONGINT \
- ? GETARG(unsigned long) \
- : flags & PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \
- flags & SIZEINT \
- ? GETARG(size_t) \
- : flags & SHORTINT \
- ? (unsigned short)GETARG(int) \
- : flags & CHARINT ? (unsigned char)GETARG(int) \
- : GETARG(unsigned int)))
-
- /*
- * Append a digit to a value and check for overflow.
- */
-#define APPEND_DIGIT(val, dig) \
- do { \
- if ((val) > INT_MAX / 10) goto overflow; \
- (val) *= 10; \
- if ((val) > INT_MAX - to_digit((dig))) goto overflow; \
- (val) += to_digit((dig)); \
- } while (0)
-
- /*
- * Get * arguments, including the form *nn$. Preserve the nextarg
- * that the argument can be gotten once the type is determined.
- */
-#define GETASTER(val) \
- n2 = 0; \
- cp = fmt; \
- while (is_digit(*cp)) { \
- APPEND_DIGIT(n2, *cp); \
- cp++; \
- } \
- if (*cp == '$') { \
- int hold = nextarg; \
- if (argtable == NULL) { \
- argtable = statargtable; \
- if (__find_arguments(fmt0, orgap, &argtable, &argtablesiz) == -1) { \
- ret = -1; \
- goto error; \
- } \
- } \
- nextarg = n2; \
- val = GETARG(int); \
- nextarg = hold; \
- fmt = ++cp; \
- } else { \
- val = GETARG(int); \
- }
-
-/*
- * Get the argument indexed by nextarg. If the argument table is
- * built, use it to get the argument. If its not, get the next
- * argument (and arguments must be gotten sequentially).
- */
-#define GETARG(type) \
- ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : (nextarg++, va_arg(ap, type)))
-
_SET_ORIENTATION(fp, -1);
// Writing "" to a read only file returns EOF, not 0.
@@ -1009,422 +765,3 @@ finish:
}
return (ret);
}
-
-/*
- * Type ids for argument type table.
- */
-#define T_UNUSED 0
-#define T_SHORT 1
-#define T_U_SHORT 2
-#define TP_SHORT 3
-#define T_INT 4
-#define T_U_INT 5
-#define TP_INT 6
-#define T_LONG 7
-#define T_U_LONG 8
-#define TP_LONG 9
-#define T_LLONG 10
-#define T_U_LLONG 11
-#define TP_LLONG 12
-#define T_DOUBLE 13
-#define T_LONG_DOUBLE 14
-#define TP_CHAR 15
-#define TP_VOID 16
-#define T_PTRINT 17
-#define TP_PTRINT 18
-#define T_SIZEINT 19
-#define T_SSIZEINT 20
-#define TP_SSIZEINT 21
-#define T_MAXINT 22
-#define T_MAXUINT 23
-#define TP_MAXINT 24
-#define T_CHAR 25
-#define T_U_CHAR 26
-#define T_WINT 27
-#define TP_WCHAR 28
-
-/*
- * Find all arguments when a positional parameter is encountered. Returns a
- * table, indexed by argument number, of pointers to each arguments. The
- * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
- * It will be replaced with a mmap-ed one if it overflows (malloc cannot be
- * used since we are attempting to make snprintf thread safe, and alloca is
- * problematic since we have nested functions..)
- */
-static int __find_arguments(const CHAR_TYPE* fmt0, va_list ap, union arg** argtable,
- size_t* argtablesiz) {
- int ch; /* character from fmt */
- int n, n2; /* handy integer (short term usage) */
- int flags; /* flags as above */
- unsigned char* typetable; /* table of types */
- unsigned char stattypetable[STATIC_ARG_TBL_SIZE];
- int tablesize; /* current size of type table */
- int tablemax; /* largest used index in table */
- int nextarg; /* 1-based argument index */
- int ret = 0; /* return value */
-
- /*
- * Add an argument type to the table, expanding if necessary.
- */
-#define ADDTYPE(type) \
- ((nextarg >= tablesize) ? __grow_type_table(&typetable, &tablesize) : 0, \
- (nextarg > tablemax) ? tablemax = nextarg : 0, typetable[nextarg++] = type)
-
-#define ADDSARG() \
- ((flags & MAXINT) \
- ? ADDTYPE(T_MAXINT) \
- : ((flags & PTRINT) ? ADDTYPE(T_PTRINT) \
- : ((flags & SIZEINT) \
- ? ADDTYPE(T_SSIZEINT) \
- : ((flags & LLONGINT) \
- ? ADDTYPE(T_LLONG) \
- : ((flags & LONGINT) \
- ? ADDTYPE(T_LONG) \
- : ((flags & SHORTINT) \
- ? ADDTYPE(T_SHORT) \
- : ((flags & CHARINT) ? ADDTYPE(T_CHAR) \
- : ADDTYPE(T_INT))))))))
-
-#define ADDUARG() \
- ((flags & MAXINT) \
- ? ADDTYPE(T_MAXUINT) \
- : ((flags & PTRINT) \
- ? ADDTYPE(T_PTRINT) \
- : ((flags & SIZEINT) \
- ? ADDTYPE(T_SIZEINT) \
- : ((flags & LLONGINT) \
- ? ADDTYPE(T_U_LLONG) \
- : ((flags & LONGINT) \
- ? ADDTYPE(T_U_LONG) \
- : ((flags & SHORTINT) \
- ? ADDTYPE(T_U_SHORT) \
- : ((flags & CHARINT) ? ADDTYPE(T_U_CHAR) \
- : ADDTYPE(T_U_INT))))))))
-
- /*
- * Add * arguments to the type array.
- */
-#define ADDASTER() \
- n2 = 0; \
- cp = fmt; \
- while (is_digit(*cp)) { \
- APPEND_DIGIT(n2, *cp); \
- cp++; \
- } \
- if (*cp == '$') { \
- int hold = nextarg; \
- nextarg = n2; \
- ADDTYPE(T_INT); \
- nextarg = hold; \
- fmt = ++cp; \
- } else { \
- ADDTYPE(T_INT); \
- }
- CHAR_TYPE* fmt = const_cast<CHAR_TYPE*>(fmt0);
- CHAR_TYPE* cp;
- typetable = stattypetable;
- tablesize = STATIC_ARG_TBL_SIZE;
- tablemax = 0;
- nextarg = 1;
- memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
-
- /*
- * Scan the format for conversions (`%' character).
- */
- for (;;) {
- for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) continue;
- if (ch == '\0') goto done;
- fmt++; /* skip over '%' */
-
- flags = 0;
-
- rflag:
- ch = *fmt++;
- reswitch:
- switch (ch) {
- case ' ':
- case '#':
- case '\'':
- goto rflag;
- case '*':
- ADDASTER();
- goto rflag;
- case '-':
- case '+':
- goto rflag;
- case '.':
- if ((ch = *fmt++) == '*') {
- ADDASTER();
- goto rflag;
- }
- while (is_digit(ch)) {
- ch = *fmt++;
- }
- goto reswitch;
- case '0':
- goto rflag;
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- n = 0;
- do {
- APPEND_DIGIT(n, ch);
- ch = *fmt++;
- } while (is_digit(ch));
- if (ch == '$') {
- nextarg = n;
- goto rflag;
- }
- goto reswitch;
- case 'L':
- flags |= LONGDBL;
- goto rflag;
- case 'h':
- if (*fmt == 'h') {
- fmt++;
- flags |= CHARINT;
- } else {
- flags |= SHORTINT;
- }
- goto rflag;
- case 'j':
- flags |= MAXINT;
- goto rflag;
- case 'l':
- if (*fmt == 'l') {
- fmt++;
- flags |= LLONGINT;
- } else {
- flags |= LONGINT;
- }
- goto rflag;
- case 'q':
- flags |= LLONGINT;
- goto rflag;
- case 't':
- flags |= PTRINT;
- goto rflag;
- case 'z':
- flags |= SIZEINT;
- goto rflag;
- case 'C':
- flags |= LONGINT;
- /*FALLTHROUGH*/
- case 'c':
- if (flags & LONGINT)
- ADDTYPE(T_WINT);
- else
- ADDTYPE(T_INT);
- break;
- case 'D':
- flags |= LONGINT;
- /*FALLTHROUGH*/
- case 'd':
- case 'i':
- ADDSARG();
- break;
- case 'a':
- case 'A':
- case 'e':
- case 'E':
- case 'f':
- case 'F':
- case 'g':
- case 'G':
- if (flags & LONGDBL)
- ADDTYPE(T_LONG_DOUBLE);
- else
- ADDTYPE(T_DOUBLE);
- break;
-#ifndef NO_PRINTF_PERCENT_N
- case 'n':
- if (flags & LLONGINT)
- ADDTYPE(TP_LLONG);
- else if (flags & LONGINT)
- ADDTYPE(TP_LONG);
- else if (flags & SHORTINT)
- ADDTYPE(TP_SHORT);
- else if (flags & PTRINT)
- ADDTYPE(TP_PTRINT);
- else if (flags & SIZEINT)
- ADDTYPE(TP_SSIZEINT);
- else if (flags & MAXINT)
- ADDTYPE(TP_MAXINT);
- else
- ADDTYPE(TP_INT);
- continue; /* no output */
-#endif /* NO_PRINTF_PERCENT_N */
- case 'O':
- flags |= LONGINT;
- /*FALLTHROUGH*/
- case 'o':
- ADDUARG();
- break;
- case 'p':
- ADDTYPE(TP_VOID);
- break;
- case 'S':
- flags |= LONGINT;
- /*FALLTHROUGH*/
- case 's':
- ADDTYPE((flags & LONGINT) ? TP_WCHAR : TP_CHAR);
- break;
- case 'U':
- flags |= LONGINT;
- /*FALLTHROUGH*/
- case 'u':
- case 'X':
- case 'x':
- ADDUARG();
- break;
- default: /* "%?" prints ?, unless ? is NUL */
- if (ch == '\0') goto done;
- break;
- }
- }
-done:
- /*
- * Build the argument table.
- */
- if (tablemax >= STATIC_ARG_TBL_SIZE) {
- *argtablesiz = sizeof(union arg) * (tablemax + 1);
- *argtable = static_cast<arg*>(mmap(NULL, *argtablesiz,
- PROT_WRITE | PROT_READ,
- MAP_ANON | MAP_PRIVATE, -1, 0));
- if (*argtable == MAP_FAILED) return -1;
- }
-
-#if 0
- /* XXX is this required? */
- (*argtable)[0].intarg = 0;
-#endif
- for (n = 1; n <= tablemax; n++) {
- switch (typetable[n]) {
- case T_UNUSED:
- case T_CHAR:
- case T_U_CHAR:
- case T_SHORT:
- case T_U_SHORT:
- case T_INT:
- (*argtable)[n].intarg = va_arg(ap, int);
- break;
- case TP_SHORT:
- (*argtable)[n].pshortarg = va_arg(ap, short*);
- break;
- case T_U_INT:
- (*argtable)[n].uintarg = va_arg(ap, unsigned int);
- break;
- case TP_INT:
- (*argtable)[n].pintarg = va_arg(ap, int*);
- break;
- case T_LONG:
- (*argtable)[n].longarg = va_arg(ap, long);
- break;
- case T_U_LONG:
- (*argtable)[n].ulongarg = va_arg(ap, unsigned long);
- break;
- case TP_LONG:
- (*argtable)[n].plongarg = va_arg(ap, long*);
- break;
- case T_LLONG:
- (*argtable)[n].longlongarg = va_arg(ap, long long);
- break;
- case T_U_LLONG:
- (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long);
- break;
- case TP_LLONG:
- (*argtable)[n].plonglongarg = va_arg(ap, long long*);
- break;
- case T_DOUBLE:
- (*argtable)[n].doublearg = va_arg(ap, double);
- break;
- case T_LONG_DOUBLE:
- (*argtable)[n].longdoublearg = va_arg(ap, long double);
- break;
- case TP_CHAR:
- (*argtable)[n].pchararg = va_arg(ap, char*);
- break;
- case TP_VOID:
- (*argtable)[n].pvoidarg = va_arg(ap, void*);
- break;
- case T_PTRINT:
- (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t);
- break;
- case TP_PTRINT:
- (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t*);
- break;
- case T_SIZEINT:
- (*argtable)[n].sizearg = va_arg(ap, size_t);
- break;
- case T_SSIZEINT:
- (*argtable)[n].ssizearg = va_arg(ap, ssize_t);
- break;
- case TP_SSIZEINT:
- (*argtable)[n].pssizearg = va_arg(ap, ssize_t*);
- break;
- case T_MAXINT:
- (*argtable)[n].intmaxarg = va_arg(ap, intmax_t);
- break;
- case T_MAXUINT:
- (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t);
- break;
- case TP_MAXINT:
- (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t*);
- break;
- case T_WINT:
- (*argtable)[n].wintarg = va_arg(ap, wint_t);
- break;
- case TP_WCHAR:
- (*argtable)[n].pwchararg = va_arg(ap, wchar_t*);
- break;
- }
- }
- goto finish;
-
-overflow:
- errno = ENOMEM;
- ret = -1;
-
-finish:
- if (typetable != NULL && typetable != stattypetable) {
- munmap(typetable, *argtablesiz);
- typetable = NULL;
- }
- return (ret);
-}
-
-/*
- * Increase the size of the type table.
- */
-static int __grow_type_table(unsigned char** typetable, int* tablesize) {
- unsigned char* old_table = *typetable;
- int new_size = *tablesize * 2;
-
- if (new_size < getpagesize()) new_size = getpagesize();
-
- if (*tablesize == STATIC_ARG_TBL_SIZE) {
- *typetable = static_cast<unsigned char*>(mmap(NULL, new_size,
- PROT_WRITE | PROT_READ,
- MAP_ANON | MAP_PRIVATE, -1, 0));
- if (*typetable == MAP_FAILED) return -1;
- bcopy(old_table, *typetable, *tablesize);
- } else {
- unsigned char* new_table = static_cast<unsigned char*>(mmap(NULL, new_size,
- PROT_WRITE | PROT_READ,
- MAP_ANON | MAP_PRIVATE, -1, 0));
- if (new_table == MAP_FAILED) return -1;
- memmove(new_table, *typetable, *tablesize);
- munmap(*typetable, *tablesize);
- *typetable = new_table;
- }
- memset(*typetable + *tablesize, T_UNUSED, (new_size - *tablesize));
-
- *tablesize = new_size;
- return 0;
-}
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