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-rw-r--r--libc/stdio/vfscanf.c1555
1 files changed, 762 insertions, 793 deletions
diff --git a/libc/stdio/vfscanf.c b/libc/stdio/vfscanf.c
index 792d7ce96e..c18e214a37 100644
--- a/libc/stdio/vfscanf.c
+++ b/libc/stdio/vfscanf.c
@@ -32,746 +32,724 @@
*/
#include <ctype.h>
-#include <wctype.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <wctype.h>
#include "local.h"
#include "floatio.h"
-#define BUF 513 /* Maximum length of numeric string. */
+#define BUF 513 /* Maximum length of numeric string. */
/*
* Flags used during conversion.
*/
-#define LONG 0x00001 /* l: long or double */
-#define LONGDBL 0x00002 /* L: long double */
-#define SHORT 0x00004 /* h: short */
-#define SHORTSHORT 0x00008 /* hh: 8 bit integer */
-#define LLONG 0x00010 /* ll: long long (+ deprecated q: quad) */
-#define POINTER 0x00020 /* p: void * (as hex) */
-#define SIZEINT 0x00040 /* z: (signed) size_t */
-#define MAXINT 0x00080 /* j: intmax_t */
-#define PTRINT 0x00100 /* t: ptrdiff_t */
-#define NOSKIP 0x00200 /* [ or c: do not skip blanks */
-#define SUPPRESS 0x00400 /* *: suppress assignment */
-#define UNSIGNED 0x00800 /* %[oupxX] conversions */
+#define LONG 0x00001 /* l: long or double */
+#define LONGDBL 0x00002 /* L: long double */
+#define SHORT 0x00004 /* h: short */
+#define SHORTSHORT 0x00008 /* hh: 8 bit integer */
+#define LLONG 0x00010 /* ll: long long (+ deprecated q: quad) */
+#define POINTER 0x00020 /* p: void * (as hex) */
+#define SIZEINT 0x00040 /* z: (signed) size_t */
+#define MAXINT 0x00080 /* j: intmax_t */
+#define PTRINT 0x00100 /* t: ptrdiff_t */
+#define NOSKIP 0x00200 /* [ or c: do not skip blanks */
+#define SUPPRESS 0x00400 /* *: suppress assignment */
+#define UNSIGNED 0x00800 /* %[oupxX] conversions */
/*
* The following are used in numeric conversions only:
* SIGNOK, HAVESIGN, NDIGITS, DPTOK, and EXPOK are for floating point;
* SIGNOK, HAVESIGN, NDIGITS, PFXOK, and NZDIGITS are for integral.
*/
-#define SIGNOK 0x01000 /* +/- is (still) legal */
-#define HAVESIGN 0x02000 /* sign detected */
-#define NDIGITS 0x04000 /* no digits detected */
+#define SIGNOK 0x01000 /* +/- is (still) legal */
+#define HAVESIGN 0x02000 /* sign detected */
+#define NDIGITS 0x04000 /* no digits detected */
-#define DPTOK 0x08000 /* (float) decimal point is still legal */
-#define EXPOK 0x10000 /* (float) exponent (e+3, etc) still legal */
+#define DPTOK 0x08000 /* (float) decimal point is still legal */
+#define EXPOK 0x10000 /* (float) exponent (e+3, etc) still legal */
-#define PFXOK 0x08000 /* 0x prefix is (still) legal */
-#define NZDIGITS 0x10000 /* no zero digits detected */
+#define PFXOK 0x08000 /* 0x prefix is (still) legal */
+#define NZDIGITS 0x10000 /* no zero digits detected */
/*
* Conversion types.
*/
-#define CT_CHAR 0 /* %c conversion */
-#define CT_CCL 1 /* %[...] conversion */
-#define CT_STRING 2 /* %s conversion */
-#define CT_INT 3 /* integer, i.e., strtoimax or strtoumax */
-#define CT_FLOAT 4 /* floating, i.e., strtod */
+#define CT_CHAR 0 /* %c conversion */
+#define CT_CCL 1 /* %[...] conversion */
+#define CT_STRING 2 /* %s conversion */
+#define CT_INT 3 /* integer, i.e., strtoimax or strtoumax */
+#define CT_FLOAT 4 /* floating, i.e., strtod */
#define u_char unsigned char
#define u_long unsigned long
-static u_char *__sccl(char *, u_char *);
+static u_char* __sccl(char*, u_char*);
/*
* Internal, unlocked version of vfscanf
*/
-int
-__svfscanf(FILE *fp, const char *fmt0, __va_list ap)
-{
- u_char *fmt = (u_char *)fmt0;
- int c; /* character from format, or conversion */
- size_t width; /* field width, or 0 */
- char *p; /* points into all kinds of strings */
- int n; /* handy integer */
- int flags; /* flags as defined above */
- char *p0; /* saves original value of p when necessary */
- int nassigned; /* number of fields assigned */
- int nread; /* number of characters consumed from fp */
- int base; /* base argument to strtoimax/strtouimax */
- char ccltab[256]; /* character class table for %[...] */
- char buf[BUF]; /* buffer for numeric conversions */
- wchar_t *wcp; /* handy wide character pointer */
- size_t nconv; /* length of multibyte sequence converted */
- mbstate_t mbs;
-
- /* `basefix' is used to avoid `if' tests in the integer scanner */
- static short basefix[17] =
- { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
-
- _SET_ORIENTATION(fp, -1);
-
- nassigned = 0;
- nread = 0;
- base = 0; /* XXX just to keep gcc happy */
- for (;;) {
- c = *fmt++;
- if (c == 0)
- return (nassigned);
- if (isspace(c)) {
- while ((fp->_r > 0 || __srefill(fp) == 0) &&
- isspace(*fp->_p))
- nread++, fp->_r--, fp->_p++;
- continue;
- }
- if (c != '%')
- goto literal;
- width = 0;
- flags = 0;
- /*
- * switch on the format. continue if done;
- * break once format type is derived.
- */
-again: c = *fmt++;
- switch (c) {
- case '%':
-literal:
- if (fp->_r <= 0 && __srefill(fp))
- goto input_failure;
- if (*fp->_p != c)
- goto match_failure;
- fp->_r--, fp->_p++;
- nread++;
- continue;
-
- case '*':
- flags |= SUPPRESS;
- goto again;
- case 'j':
- flags |= MAXINT;
- goto again;
- case 'L':
- flags |= LONGDBL;
- goto again;
- case 'h':
- if (*fmt == 'h') {
- fmt++;
- flags |= SHORTSHORT;
- } else {
- flags |= SHORT;
- }
- goto again;
- case 'l':
- if (*fmt == 'l') {
- fmt++;
- flags |= LLONG;
- } else {
- flags |= LONG;
- }
- goto again;
- case 'q':
- flags |= LLONG; /* deprecated */
- goto again;
- case 't':
- flags |= PTRINT;
- goto again;
- case 'z':
- flags |= SIZEINT;
- goto again;
-
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- width = width * 10 + c - '0';
- goto again;
-
- /*
- * Conversions.
- * Those marked `compat' are for 4.[123]BSD compatibility.
- *
- * (According to ANSI, E and X formats are supposed
- * to the same as e and x. Sorry about that.)
- */
- case 'D': /* compat */
- flags |= LONG;
- /* FALLTHROUGH */
- case 'd':
- c = CT_INT;
- base = 10;
- break;
-
- case 'i':
- c = CT_INT;
- base = 0;
- break;
-
- case 'O': /* compat */
- flags |= LONG;
- /* FALLTHROUGH */
- case 'o':
- c = CT_INT;
- flags |= UNSIGNED;
- base = 8;
- break;
-
- case 'u':
- c = CT_INT;
- flags |= UNSIGNED;
- base = 10;
- break;
-
- case 'X':
- case 'x':
- flags |= PFXOK; /* enable 0x prefixing */
- c = CT_INT;
- flags |= UNSIGNED;
- base = 16;
- break;
-
- case 'e': case 'E':
- case 'f': case 'F':
- case 'g': case 'G':
- case 'a': case 'A':
- c = CT_FLOAT;
- break;
-
- case 's':
- c = CT_STRING;
- break;
-
- case '[':
- fmt = __sccl(ccltab, fmt);
- flags |= NOSKIP;
- c = CT_CCL;
- break;
-
- case 'c':
- flags |= NOSKIP;
- c = CT_CHAR;
- break;
-
- case 'p': /* pointer format is like hex */
- flags |= POINTER | PFXOK;
- c = CT_INT;
- flags |= UNSIGNED;
- base = 16;
- break;
-
- case 'n':
- if (flags & SUPPRESS)
- continue;
- if (flags & SHORTSHORT)
- *va_arg(ap, signed char *) = nread;
- else if (flags & SHORT)
- *va_arg(ap, short *) = nread;
- else if (flags & LONG)
- *va_arg(ap, long *) = nread;
- else if (flags & SIZEINT)
- *va_arg(ap, ssize_t *) = nread;
- else if (flags & PTRINT)
- *va_arg(ap, ptrdiff_t *) = nread;
- else if (flags & LLONG)
- *va_arg(ap, long long *) = nread;
- else if (flags & MAXINT)
- *va_arg(ap, intmax_t *) = nread;
- else
- *va_arg(ap, int *) = nread;
- continue;
-
- /*
- * Disgusting backwards compatibility hacks. XXX
- */
- case '\0': /* compat */
- return (EOF);
-
- default: /* compat */
- if (isupper(c))
- flags |= LONG;
- c = CT_INT;
- base = 10;
- break;
- }
-
- /*
- * We have a conversion that requires input.
- */
- if (fp->_r <= 0 && __srefill(fp))
- goto input_failure;
-
- /*
- * Consume leading white space, except for formats
- * that suppress this.
- */
- if ((flags & NOSKIP) == 0) {
- while (isspace(*fp->_p)) {
- nread++;
- if (--fp->_r > 0)
- fp->_p++;
- else if (__srefill(fp))
- goto input_failure;
- }
- /*
- * Note that there is at least one character in
- * the buffer, so conversions that do not set NOSKIP
- * ca no longer result in an input failure.
- */
- }
-
- /*
- * Do the conversion.
- */
- switch (c) {
-
- case CT_CHAR:
- /* scan arbitrary characters (sets NOSKIP) */
- if (width == 0)
- width = 1;
- if (flags & LONG) {
- if ((flags & SUPPRESS) == 0)
- wcp = va_arg(ap, wchar_t *);
- else
- wcp = NULL;
- n = 0;
- while (width != 0) {
- if (n == (int)MB_CUR_MAX) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- buf[n++] = *fp->_p;
- fp->_p++;
- fp->_r--;
- memset(&mbs, 0, sizeof(mbs));
- nconv = mbrtowc(wcp, buf, n, &mbs);
- if (nconv == (size_t)-1) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- if (nconv == 0 && !(flags & SUPPRESS))
- *wcp = L'\0';
- if (nconv != (size_t)-2) {
- nread += n;
- width--;
- if (!(flags & SUPPRESS))
- wcp++;
- n = 0;
- }
- if (fp->_r <= 0 && __srefill(fp)) {
- if (n != 0) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- break;
- }
- }
- if (!(flags & SUPPRESS))
- nassigned++;
- } else if (flags & SUPPRESS) {
- size_t sum = 0;
- for (;;) {
- if ((n = fp->_r) < (int)width) {
- sum += n;
- width -= n;
- fp->_p += n;
- if (__srefill(fp)) {
- if (sum == 0)
- goto input_failure;
- break;
- }
- } else {
- sum += width;
- fp->_r -= width;
- fp->_p += width;
- break;
- }
- }
- nread += sum;
- } else {
- size_t r = fread((void *)va_arg(ap, char *), 1,
- width, fp);
-
- if (r == 0)
- goto input_failure;
- nread += r;
- nassigned++;
- }
- break;
-
- case CT_CCL:
- /* scan a (nonempty) character class (sets NOSKIP) */
- if (width == 0)
- width = (size_t)~0; /* `infinity' */
- /* take only those things in the class */
- if (flags & LONG) {
- wchar_t twc;
- int nchars;
-
- if ((flags & SUPPRESS) == 0)
- wcp = va_arg(ap, wchar_t *);
- else
- wcp = &twc;
- n = 0;
- nchars = 0;
- while (width != 0) {
- if (n == (int)MB_CUR_MAX) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- buf[n++] = *fp->_p;
- fp->_p++;
- fp->_r--;
- memset(&mbs, 0, sizeof(mbs));
- nconv = mbrtowc(wcp, buf, n, &mbs);
- if (nconv == (size_t)-1) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- if (nconv == 0)
- *wcp = L'\0';
- if (nconv != (size_t)-2) {
- if (wctob(*wcp) != EOF &&
- !ccltab[wctob(*wcp)]) {
- while (n != 0) {
- n--;
- ungetc(buf[n],
- fp);
- }
- break;
- }
- nread += n;
- width--;
- if (!(flags & SUPPRESS))
- wcp++;
- nchars++;
- n = 0;
- }
- if (fp->_r <= 0 && __srefill(fp)) {
- if (n != 0) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- break;
- }
- }
- if (n != 0) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- n = nchars;
- if (n == 0)
- goto match_failure;
- if (!(flags & SUPPRESS)) {
- *wcp = L'\0';
- nassigned++;
- }
- } else
- /* take only those things in the class */
- if (flags & SUPPRESS) {
- n = 0;
- while (ccltab[*fp->_p]) {
- n++, fp->_r--, fp->_p++;
- if (--width == 0)
- break;
- if (fp->_r <= 0 && __srefill(fp)) {
- if (n == 0)
- goto input_failure;
- break;
- }
- }
- if (n == 0)
- goto match_failure;
- } else {
- p0 = p = va_arg(ap, char *);
- while (ccltab[*fp->_p]) {
- fp->_r--;
- *p++ = *fp->_p++;
- if (--width == 0)
- break;
- if (fp->_r <= 0 && __srefill(fp)) {
- if (p == p0)
- goto input_failure;
- break;
- }
- }
- n = p - p0;
- if (n == 0)
- goto match_failure;
- *p = '\0';
- nassigned++;
- }
- nread += n;
- break;
-
- case CT_STRING:
- /* like CCL, but zero-length string OK, & no NOSKIP */
- if (width == 0)
- width = (size_t)~0;
- if (flags & LONG) {
- wchar_t twc;
-
- if ((flags & SUPPRESS) == 0)
- wcp = va_arg(ap, wchar_t *);
- else
- wcp = &twc;
- n = 0;
- while (!isspace(*fp->_p) && width != 0) {
- if (n == (int)MB_CUR_MAX) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- buf[n++] = *fp->_p;
- fp->_p++;
- fp->_r--;
- memset(&mbs, 0, sizeof(mbs));
- nconv = mbrtowc(wcp, buf, n, &mbs);
- if (nconv == (size_t)-1) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- if (nconv == 0)
- *wcp = L'\0';
- if (nconv != (size_t)-2) {
- if (iswspace(*wcp)) {
- while (n != 0) {
- n--;
- ungetc(buf[n],
- fp);
- }
- break;
- }
- nread += n;
- width--;
- if (!(flags & SUPPRESS))
- wcp++;
- n = 0;
- }
- if (fp->_r <= 0 && __srefill(fp)) {
- if (n != 0) {
- fp->_flags |= __SERR;
- goto input_failure;
- }
- break;
- }
- }
- if (!(flags & SUPPRESS)) {
- *wcp = L'\0';
- nassigned++;
- }
- } else if (flags & SUPPRESS) {
- n = 0;
- while (!isspace(*fp->_p)) {
- n++, fp->_r--, fp->_p++;
- if (--width == 0)
- break;
- if (fp->_r <= 0 && __srefill(fp))
- break;
- }
- nread += n;
- } else {
- p0 = p = va_arg(ap, char *);
- while (!isspace(*fp->_p)) {
- fp->_r--;
- *p++ = *fp->_p++;
- if (--width == 0)
- break;
- if (fp->_r <= 0 && __srefill(fp))
- break;
- }
- *p = '\0';
- nread += p - p0;
- nassigned++;
- }
- continue;
-
- case CT_INT:
- /* scan an integer as if by strtoimax/strtoumax */
+int __svfscanf(FILE* fp, const char* fmt0, __va_list ap) {
+ u_char* fmt = (u_char*)fmt0;
+ int c; /* character from format, or conversion */
+ size_t width; /* field width, or 0 */
+ char* p; /* points into all kinds of strings */
+ int n; /* handy integer */
+ int flags; /* flags as defined above */
+ char* p0; /* saves original value of p when necessary */
+ int nassigned; /* number of fields assigned */
+ int nread; /* number of characters consumed from fp */
+ int base; /* base argument to strtoimax/strtouimax */
+ char ccltab[256]; /* character class table for %[...] */
+ char buf[BUF]; /* buffer for numeric conversions */
+ wchar_t* wcp; /* handy wide character pointer */
+ size_t nconv; /* length of multibyte sequence converted */
+ mbstate_t mbs;
+
+ /* `basefix' is used to avoid `if' tests in the integer scanner */
+ static short basefix[17] = { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
+
+ _SET_ORIENTATION(fp, -1);
+
+ nassigned = 0;
+ nread = 0;
+ base = 0; /* XXX just to keep gcc happy */
+ for (;;) {
+ c = *fmt++;
+ if (c == 0) return (nassigned);
+ if (isspace(c)) {
+ while ((fp->_r > 0 || __srefill(fp) == 0) && isspace(*fp->_p)) nread++, fp->_r--, fp->_p++;
+ continue;
+ }
+ if (c != '%') goto literal;
+ width = 0;
+ flags = 0;
+ /*
+ * switch on the format. continue if done;
+ * break once format type is derived.
+ */
+ again:
+ c = *fmt++;
+ switch (c) {
+ case '%':
+ literal:
+ if (fp->_r <= 0 && __srefill(fp)) goto input_failure;
+ if (*fp->_p != c) goto match_failure;
+ fp->_r--, fp->_p++;
+ nread++;
+ continue;
+
+ case '*':
+ flags |= SUPPRESS;
+ goto again;
+ case 'j':
+ flags |= MAXINT;
+ goto again;
+ case 'L':
+ flags |= LONGDBL;
+ goto again;
+ case 'h':
+ if (*fmt == 'h') {
+ fmt++;
+ flags |= SHORTSHORT;
+ } else {
+ flags |= SHORT;
+ }
+ goto again;
+ case 'l':
+ if (*fmt == 'l') {
+ fmt++;
+ flags |= LLONG;
+ } else {
+ flags |= LONG;
+ }
+ goto again;
+ case 'q':
+ flags |= LLONG; /* deprecated */
+ goto again;
+ case 't':
+ flags |= PTRINT;
+ goto again;
+ case 'z':
+ flags |= SIZEINT;
+ goto again;
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ width = width * 10 + c - '0';
+ goto again;
+
+ /*
+ * Conversions.
+ * Those marked `compat' are for 4.[123]BSD compatibility.
+ *
+ * (According to ANSI, E and X formats are supposed
+ * to the same as e and x. Sorry about that.)
+ */
+ case 'D': /* compat */
+ flags |= LONG;
+ /* FALLTHROUGH */
+ case 'd':
+ c = CT_INT;
+ base = 10;
+ break;
+
+ case 'i':
+ c = CT_INT;
+ base = 0;
+ break;
+
+ case 'O': /* compat */
+ flags |= LONG;
+ /* FALLTHROUGH */
+ case 'o':
+ c = CT_INT;
+ flags |= UNSIGNED;
+ base = 8;
+ break;
+
+ case 'u':
+ c = CT_INT;
+ flags |= UNSIGNED;
+ base = 10;
+ break;
+
+ case 'X':
+ case 'x':
+ flags |= PFXOK; /* enable 0x prefixing */
+ c = CT_INT;
+ flags |= UNSIGNED;
+ base = 16;
+ break;
+
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'F':
+ case 'g':
+ case 'G':
+ case 'a':
+ case 'A':
+ c = CT_FLOAT;
+ break;
+
+ case 's':
+ c = CT_STRING;
+ break;
+
+ case '[':
+ fmt = __sccl(ccltab, fmt);
+ flags |= NOSKIP;
+ c = CT_CCL;
+ break;
+
+ case 'c':
+ flags |= NOSKIP;
+ c = CT_CHAR;
+ break;
+
+ case 'p': /* pointer format is like hex */
+ flags |= POINTER | PFXOK;
+ c = CT_INT;
+ flags |= UNSIGNED;
+ base = 16;
+ break;
+
+ case 'n':
+ if (flags & SUPPRESS) continue;
+ if (flags & SHORTSHORT)
+ *va_arg(ap, signed char*) = nread;
+ else if (flags & SHORT)
+ *va_arg(ap, short*) = nread;
+ else if (flags & LONG)
+ *va_arg(ap, long*) = nread;
+ else if (flags & SIZEINT)
+ *va_arg(ap, ssize_t*) = nread;
+ else if (flags & PTRINT)
+ *va_arg(ap, ptrdiff_t*) = nread;
+ else if (flags & LLONG)
+ *va_arg(ap, long long*) = nread;
+ else if (flags & MAXINT)
+ *va_arg(ap, intmax_t*) = nread;
+ else
+ *va_arg(ap, int*) = nread;
+ continue;
+
+ /*
+ * Disgusting backwards compatibility hacks. XXX
+ */
+ case '\0': /* compat */
+ return (EOF);
+
+ default: /* compat */
+ if (isupper(c)) flags |= LONG;
+ c = CT_INT;
+ base = 10;
+ break;
+ }
+
+ /*
+ * We have a conversion that requires input.
+ */
+ if (fp->_r <= 0 && __srefill(fp)) goto input_failure;
+
+ /*
+ * Consume leading white space, except for formats
+ * that suppress this.
+ */
+ if ((flags & NOSKIP) == 0) {
+ while (isspace(*fp->_p)) {
+ nread++;
+ if (--fp->_r > 0)
+ fp->_p++;
+ else if (__srefill(fp))
+ goto input_failure;
+ }
+ /*
+ * Note that there is at least one character in
+ * the buffer, so conversions that do not set NOSKIP
+ * ca no longer result in an input failure.
+ */
+ }
+
+ /*
+ * Do the conversion.
+ */
+ switch (c) {
+ case CT_CHAR:
+ /* scan arbitrary characters (sets NOSKIP) */
+ if (width == 0) width = 1;
+ if (flags & LONG) {
+ if ((flags & SUPPRESS) == 0)
+ wcp = va_arg(ap, wchar_t*);
+ else
+ wcp = NULL;
+ n = 0;
+ while (width != 0) {
+ if (n == (int)MB_CUR_MAX) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ buf[n++] = *fp->_p;
+ fp->_p++;
+ fp->_r--;
+ memset(&mbs, 0, sizeof(mbs));
+ nconv = mbrtowc(wcp, buf, n, &mbs);
+ if (nconv == (size_t)-1) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ if (nconv == 0 && !(flags & SUPPRESS)) *wcp = L'\0';
+ if (nconv != (size_t)-2) {
+ nread += n;
+ width--;
+ if (!(flags & SUPPRESS)) wcp++;
+ n = 0;
+ }
+ if (fp->_r <= 0 && __srefill(fp)) {
+ if (n != 0) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ break;
+ }
+ }
+ if (!(flags & SUPPRESS)) nassigned++;
+ } else if (flags & SUPPRESS) {
+ size_t sum = 0;
+ for (;;) {
+ if ((n = fp->_r) < (int)width) {
+ sum += n;
+ width -= n;
+ fp->_p += n;
+ if (__srefill(fp)) {
+ if (sum == 0) goto input_failure;
+ break;
+ }
+ } else {
+ sum += width;
+ fp->_r -= width;
+ fp->_p += width;
+ break;
+ }
+ }
+ nread += sum;
+ } else {
+ size_t r = fread((void*)va_arg(ap, char*), 1, width, fp);
+
+ if (r == 0) goto input_failure;
+ nread += r;
+ nassigned++;
+ }
+ break;
+
+ case CT_CCL:
+ /* scan a (nonempty) character class (sets NOSKIP) */
+ if (width == 0) width = (size_t)~0; /* `infinity' */
+ /* take only those things in the class */
+ if (flags & LONG) {
+ wchar_t twc;
+ int nchars;
+
+ if ((flags & SUPPRESS) == 0)
+ wcp = va_arg(ap, wchar_t*);
+ else
+ wcp = &twc;
+ n = 0;
+ nchars = 0;
+ while (width != 0) {
+ if (n == (int)MB_CUR_MAX) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ buf[n++] = *fp->_p;
+ fp->_p++;
+ fp->_r--;
+ memset(&mbs, 0, sizeof(mbs));
+ nconv = mbrtowc(wcp, buf, n, &mbs);
+ if (nconv == (size_t)-1) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ if (nconv == 0) *wcp = L'\0';
+ if (nconv != (size_t)-2) {
+ if (wctob(*wcp) != EOF && !ccltab[wctob(*wcp)]) {
+ while (n != 0) {
+ n--;
+ ungetc(buf[n], fp);
+ }
+ break;
+ }
+ nread += n;
+ width--;
+ if (!(flags & SUPPRESS)) wcp++;
+ nchars++;
+ n = 0;
+ }
+ if (fp->_r <= 0 && __srefill(fp)) {
+ if (n != 0) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ break;
+ }
+ }
+ if (n != 0) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ n = nchars;
+ if (n == 0) goto match_failure;
+ if (!(flags & SUPPRESS)) {
+ *wcp = L'\0';
+ nassigned++;
+ }
+ } else
+ /* take only those things in the class */
+ if (flags & SUPPRESS) {
+ n = 0;
+ while (ccltab[*fp->_p]) {
+ n++, fp->_r--, fp->_p++;
+ if (--width == 0) break;
+ if (fp->_r <= 0 && __srefill(fp)) {
+ if (n == 0) goto input_failure;
+ break;
+ }
+ }
+ if (n == 0) goto match_failure;
+ } else {
+ p0 = p = va_arg(ap, char*);
+ while (ccltab[*fp->_p]) {
+ fp->_r--;
+ *p++ = *fp->_p++;
+ if (--width == 0) break;
+ if (fp->_r <= 0 && __srefill(fp)) {
+ if (p == p0) goto input_failure;
+ break;
+ }
+ }
+ n = p - p0;
+ if (n == 0) goto match_failure;
+ *p = '\0';
+ nassigned++;
+ }
+ nread += n;
+ break;
+
+ case CT_STRING:
+ /* like CCL, but zero-length string OK, & no NOSKIP */
+ if (width == 0) width = (size_t)~0;
+ if (flags & LONG) {
+ wchar_t twc;
+
+ if ((flags & SUPPRESS) == 0)
+ wcp = va_arg(ap, wchar_t*);
+ else
+ wcp = &twc;
+ n = 0;
+ while (!isspace(*fp->_p) && width != 0) {
+ if (n == (int)MB_CUR_MAX) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ buf[n++] = *fp->_p;
+ fp->_p++;
+ fp->_r--;
+ memset(&mbs, 0, sizeof(mbs));
+ nconv = mbrtowc(wcp, buf, n, &mbs);
+ if (nconv == (size_t)-1) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ if (nconv == 0) *wcp = L'\0';
+ if (nconv != (size_t)-2) {
+ if (iswspace(*wcp)) {
+ while (n != 0) {
+ n--;
+ ungetc(buf[n], fp);
+ }
+ break;
+ }
+ nread += n;
+ width--;
+ if (!(flags & SUPPRESS)) wcp++;
+ n = 0;
+ }
+ if (fp->_r <= 0 && __srefill(fp)) {
+ if (n != 0) {
+ fp->_flags |= __SERR;
+ goto input_failure;
+ }
+ break;
+ }
+ }
+ if (!(flags & SUPPRESS)) {
+ *wcp = L'\0';
+ nassigned++;
+ }
+ } else if (flags & SUPPRESS) {
+ n = 0;
+ while (!isspace(*fp->_p)) {
+ n++, fp->_r--, fp->_p++;
+ if (--width == 0) break;
+ if (fp->_r <= 0 && __srefill(fp)) break;
+ }
+ nread += n;
+ } else {
+ p0 = p = va_arg(ap, char*);
+ while (!isspace(*fp->_p)) {
+ fp->_r--;
+ *p++ = *fp->_p++;
+ if (--width == 0) break;
+ if (fp->_r <= 0 && __srefill(fp)) break;
+ }
+ *p = '\0';
+ nread += p - p0;
+ nassigned++;
+ }
+ continue;
+
+ case CT_INT:
+ /* scan an integer as if by strtoimax/strtoumax */
#ifdef hardway
- if (width == 0 || width > sizeof(buf) - 1)
- width = sizeof(buf) - 1;
+ if (width == 0 || width > sizeof(buf) - 1) width = sizeof(buf) - 1;
#else
- /* size_t is unsigned, hence this optimisation */
- if (--width > sizeof(buf) - 2)
- width = sizeof(buf) - 2;
- width++;
+ /* size_t is unsigned, hence this optimisation */
+ if (--width > sizeof(buf) - 2) width = sizeof(buf) - 2;
+ width++;
#endif
- flags |= SIGNOK | NDIGITS | NZDIGITS;
- for (p = buf; width; width--) {
- c = *fp->_p;
- /*
- * Switch on the character; `goto ok'
- * if we accept it as a part of number.
- */
- switch (c) {
-
- /*
- * The digit 0 is always legal, but is
- * special. For %i conversions, if no
- * digits (zero or nonzero) have been
- * scanned (only signs), we will have
- * base==0. In that case, we should set
- * it to 8 and enable 0x prefixing.
- * Also, if we have not scanned zero digits
- * before this, do not turn off prefixing
- * (someone else will turn it off if we
- * have scanned any nonzero digits).
- */
- case '0':
- if (base == 0) {
- base = 8;
- flags |= PFXOK;
- }
- if (flags & NZDIGITS)
- flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
- else
- flags &= ~(SIGNOK|PFXOK|NDIGITS);
- goto ok;
-
- /* 1 through 7 always legal */
- case '1': case '2': case '3':
- case '4': case '5': case '6': case '7':
- base = basefix[base];
- flags &= ~(SIGNOK | PFXOK | NDIGITS);
- goto ok;
-
- /* digits 8 and 9 ok iff decimal or hex */
- case '8': case '9':
- base = basefix[base];
- if (base <= 8)
- break; /* not legal here */
- flags &= ~(SIGNOK | PFXOK | NDIGITS);
- goto ok;
-
- /* letters ok iff hex */
- case 'A': case 'B': case 'C':
- case 'D': case 'E': case 'F':
- case 'a': case 'b': case 'c':
- case 'd': case 'e': case 'f':
- /* no need to fix base here */
- if (base <= 10)
- break; /* not legal here */
- flags &= ~(SIGNOK | PFXOK | NDIGITS);
- goto ok;
-
- /* sign ok only as first character */
- case '+': case '-':
- if (flags & SIGNOK) {
- flags &= ~SIGNOK;
- flags |= HAVESIGN;
- goto ok;
- }
- break;
-
- /*
- * x ok iff flag still set and 2nd char (or
- * 3rd char if we have a sign).
- */
- case 'x': case 'X':
- if ((flags & PFXOK) && p ==
- buf + 1 + !!(flags & HAVESIGN)) {
- base = 16; /* if %i */
- flags &= ~PFXOK;
- goto ok;
- }
- break;
- }
-
- /*
- * If we got here, c is not a legal character
- * for a number. Stop accumulating digits.
- */
- break;
- ok:
- /*
- * c is legal: store it and look at the next.
- */
- *p++ = c;
- if (--fp->_r > 0)
- fp->_p++;
- else if (__srefill(fp))
- break; /* EOF */
- }
- /*
- * If we had only a sign, it is no good; push
- * back the sign. If the number ends in `x',
- * it was [sign] '0' 'x', so push back the x
- * and treat it as [sign] '0'.
- */
- if (flags & NDIGITS) {
- if (p > buf)
- (void) ungetc(*(u_char *)--p, fp);
- goto match_failure;
- }
- c = ((u_char *)p)[-1];
- if (c == 'x' || c == 'X') {
- --p;
- (void) ungetc(c, fp);
- }
- if ((flags & SUPPRESS) == 0) {
- uintmax_t res;
-
- *p = '\0';
- if (flags & UNSIGNED)
- res = strtoumax(buf, NULL, base);
- else
- res = strtoimax(buf, NULL, base);
- if (flags & POINTER)
- *va_arg(ap, void **) =
- (void *)(uintptr_t)res;
- else if (flags & MAXINT)
- *va_arg(ap, intmax_t *) = res;
- else if (flags & LLONG)
- *va_arg(ap, long long *) = res;
- else if (flags & SIZEINT)
- *va_arg(ap, ssize_t *) = res;
- else if (flags & PTRINT)
- *va_arg(ap, ptrdiff_t *) = res;
- else if (flags & LONG)
- *va_arg(ap, long *) = res;
- else if (flags & SHORT)
- *va_arg(ap, short *) = res;
- else if (flags & SHORTSHORT)
- *va_arg(ap, signed char *) = res;
- else
- *va_arg(ap, int *) = res;
- nassigned++;
- }
- nread += p - buf;
- break;
-
- case CT_FLOAT:
- /* scan a floating point number as if by strtod */
- if (width == 0 || width > sizeof(buf) - 1)
- width = sizeof(buf) - 1;
- if ((width = parsefloat(fp, buf, buf + width)) == 0)
- goto match_failure;
- if ((flags & SUPPRESS) == 0) {
- if (flags & LONGDBL) {
- long double res = strtold(buf, &p);
- *va_arg(ap, long double *) = res;
- } else if (flags & LONG) {
- double res = strtod(buf, &p);
- *va_arg(ap, double *) = res;
- } else {
- float res = strtof(buf, &p);
- *va_arg(ap, float *) = res;
- }
- if ((size_t)(p - buf) != width) abort();
- nassigned++;
- }
- nread += width;
- break;
- }
- }
+ flags |= SIGNOK | NDIGITS | NZDIGITS;
+ for (p = buf; width; width--) {
+ c = *fp->_p;
+ /*
+ * Switch on the character; `goto ok'
+ * if we accept it as a part of number.
+ */
+ switch (c) {
+ /*
+ * The digit 0 is always legal, but is
+ * special. For %i conversions, if no
+ * digits (zero or nonzero) have been
+ * scanned (only signs), we will have
+ * base==0. In that case, we should set
+ * it to 8 and enable 0x prefixing.
+ * Also, if we have not scanned zero digits
+ * before this, do not turn off prefixing
+ * (someone else will turn it off if we
+ * have scanned any nonzero digits).
+ */
+ case '0':
+ if (base == 0) {
+ base = 8;
+ flags |= PFXOK;
+ }
+ if (flags & NZDIGITS)
+ flags &= ~(SIGNOK | NZDIGITS | NDIGITS);
+ else
+ flags &= ~(SIGNOK | PFXOK | NDIGITS);
+ goto ok;
+
+ /* 1 through 7 always legal */
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ base = basefix[base];
+ flags &= ~(SIGNOK | PFXOK | NDIGITS);
+ goto ok;
+
+ /* digits 8 and 9 ok iff decimal or hex */
+ case '8':
+ case '9':
+ base = basefix[base];
+ if (base <= 8) break; /* not legal here */
+ flags &= ~(SIGNOK | PFXOK | NDIGITS);
+ goto ok;
+
+ /* letters ok iff hex */
+ case 'A':
+ case 'B':
+ case 'C':
+ case 'D':
+ case 'E':
+ case 'F':
+ case 'a':
+ case 'b':
+ case 'c':
+ case 'd':
+ case 'e':
+ case 'f':
+ /* no need to fix base here */
+ if (base <= 10) break; /* not legal here */
+ flags &= ~(SIGNOK | PFXOK | NDIGITS);
+ goto ok;
+
+ /* sign ok only as first character */
+ case '+':
+ case '-':
+ if (flags & SIGNOK) {
+ flags &= ~SIGNOK;
+ flags |= HAVESIGN;
+ goto ok;
+ }
+ break;
+
+ /*
+ * x ok iff flag still set and 2nd char (or
+ * 3rd char if we have a sign).
+ */
+ case 'x':
+ case 'X':
+ if ((flags & PFXOK) && p == buf + 1 + !!(flags & HAVESIGN)) {
+ base = 16; /* if %i */
+ flags &= ~PFXOK;
+ goto ok;
+ }
+ break;
+ }
+
+ /*
+ * If we got here, c is not a legal character
+ * for a number. Stop accumulating digits.
+ */
+ break;
+ ok:
+ /*
+ * c is legal: store it and look at the next.
+ */
+ *p++ = c;
+ if (--fp->_r > 0)
+ fp->_p++;
+ else if (__srefill(fp))
+ break; /* EOF */
+ }
+ /*
+ * If we had only a sign, it is no good; push
+ * back the sign. If the number ends in `x',
+ * it was [sign] '0' 'x', so push back the x
+ * and treat it as [sign] '0'.
+ */
+ if (flags & NDIGITS) {
+ if (p > buf) (void)ungetc(*(u_char*)--p, fp);
+ goto match_failure;
+ }
+ c = ((u_char*)p)[-1];
+ if (c == 'x' || c == 'X') {
+ --p;
+ (void)ungetc(c, fp);
+ }
+ if ((flags & SUPPRESS) == 0) {
+ uintmax_t res;
+
+ *p = '\0';
+ if (flags & UNSIGNED)
+ res = strtoumax(buf, NULL, base);
+ else
+ res = strtoimax(buf, NULL, base);
+ if (flags & POINTER)
+ *va_arg(ap, void**) = (void*)(uintptr_t)res;
+ else if (flags & MAXINT)
+ *va_arg(ap, intmax_t*) = res;
+ else if (flags & LLONG)
+ *va_arg(ap, long long*) = res;
+ else if (flags & SIZEINT)
+ *va_arg(ap, ssize_t*) = res;
+ else if (flags & PTRINT)
+ *va_arg(ap, ptrdiff_t*) = res;
+ else if (flags & LONG)
+ *va_arg(ap, long*) = res;
+ else if (flags & SHORT)
+ *va_arg(ap, short*) = res;
+ else if (flags & SHORTSHORT)
+ *va_arg(ap, signed char*) = res;
+ else
+ *va_arg(ap, int*) = res;
+ nassigned++;
+ }
+ nread += p - buf;
+ break;
+
+ case CT_FLOAT:
+ /* scan a floating point number as if by strtod */
+ if (width == 0 || width > sizeof(buf) - 1) width = sizeof(buf) - 1;
+ if ((width = parsefloat(fp, buf, buf + width)) == 0) goto match_failure;
+ if ((flags & SUPPRESS) == 0) {
+ if (flags & LONGDBL) {
+ long double res = strtold(buf, &p);
+ *va_arg(ap, long double*) = res;
+ } else if (flags & LONG) {
+ double res = strtod(buf, &p);
+ *va_arg(ap, double*) = res;
+ } else {
+ float res = strtof(buf, &p);
+ *va_arg(ap, float*) = res;
+ }
+ if ((size_t)(p - buf) != width) abort();
+ nassigned++;
+ }
+ nread += width;
+ break;
+ }
+ }
input_failure:
- if (nassigned == 0)
- nassigned = -1;
+ if (nassigned == 0) nassigned = -1;
match_failure:
- return (nassigned);
+ return (nassigned);
}
/*
@@ -780,103 +758,94 @@ match_failure:
* closing `]'. The table has a 1 wherever characters should be
* considered part of the scanset.
*/
-static u_char *
-__sccl(char *tab, u_char *fmt)
-{
- int c, n, v;
-
- /* first `clear' the whole table */
- c = *fmt++; /* first char hat => negated scanset */
- if (c == '^') {
- v = 1; /* default => accept */
- c = *fmt++; /* get new first char */
- } else
- v = 0; /* default => reject */
- /* should probably use memset here */
- for (n = 0; n < 256; n++)
- tab[n] = v;
- if (c == 0)
- return (fmt - 1);/* format ended before closing ] */
-
- /*
- * Now set the entries corresponding to the actual scanset
- * to the opposite of the above.
- *
- * The first character may be ']' (or '-') without being special;
- * the last character may be '-'.
- */
- v = 1 - v;
- for (;;) {
- tab[c] = v; /* take character c */
-doswitch:
- n = *fmt++; /* and examine the next */
- switch (n) {
-
- case 0: /* format ended too soon */
- return (fmt - 1);
-
- case '-':
- /*
- * A scanset of the form
- * [01+-]
- * is defined as `the digit 0, the digit 1,
- * the character +, the character -', but
- * the effect of a scanset such as
- * [a-zA-Z0-9]
- * is implementation defined. The V7 Unix
- * scanf treats `a-z' as `the letters a through
- * z', but treats `a-a' as `the letter a, the
- * character -, and the letter a'.
- *
- * For compatibility, the `-' is not considerd
- * to define a range if the character following
- * it is either a close bracket (required by ANSI)
- * or is not numerically greater than the character
- * we just stored in the table (c).
- */
- n = *fmt;
- if (n == ']' || n < c) {
- c = '-';
- break; /* resume the for(;;) */
- }
- fmt++;
- do { /* fill in the range */
- tab[++c] = v;
- } while (c < n);
-#if 1 /* XXX another disgusting compatibility hack */
- /*
- * Alas, the V7 Unix scanf also treats formats
- * such as [a-c-e] as `the letters a through e'.
- * This too is permitted by the standard....
- */
- goto doswitch;
+static u_char* __sccl(char* tab, u_char* fmt) {
+ int c, n, v;
+
+ /* first `clear' the whole table */
+ c = *fmt++; /* first char hat => negated scanset */
+ if (c == '^') {
+ v = 1; /* default => accept */
+ c = *fmt++; /* get new first char */
+ } else
+ v = 0; /* default => reject */
+ /* should probably use memset here */
+ for (n = 0; n < 256; n++) tab[n] = v;
+ if (c == 0) return (fmt - 1); /* format ended before closing ] */
+
+ /*
+ * Now set the entries corresponding to the actual scanset
+ * to the opposite of the above.
+ *
+ * The first character may be ']' (or '-') without being special;
+ * the last character may be '-'.
+ */
+ v = 1 - v;
+ for (;;) {
+ tab[c] = v; /* take character c */
+ doswitch:
+ n = *fmt++; /* and examine the next */
+ switch (n) {
+ case 0: /* format ended too soon */
+ return (fmt - 1);
+
+ case '-':
+ /*
+ * A scanset of the form
+ * [01+-]
+ * is defined as `the digit 0, the digit 1,
+ * the character +, the character -', but
+ * the effect of a scanset such as
+ * [a-zA-Z0-9]
+ * is implementation defined. The V7 Unix
+ * scanf treats `a-z' as `the letters a through
+ * z', but treats `a-a' as `the letter a, the
+ * character -, and the letter a'.
+ *
+ * For compatibility, the `-' is not considerd
+ * to define a range if the character following
+ * it is either a close bracket (required by ANSI)
+ * or is not numerically greater than the character
+ * we just stored in the table (c).
+ */
+ n = *fmt;
+ if (n == ']' || n < c) {
+ c = '-';
+ break; /* resume the for(;;) */
+ }
+ fmt++;
+ do { /* fill in the range */
+ tab[++c] = v;
+ } while (c < n);
+#if 1 /* XXX another disgusting compatibility hack */
+ /*
+ * Alas, the V7 Unix scanf also treats formats
+ * such as [a-c-e] as `the letters a through e'.
+ * This too is permitted by the standard....
+ */
+ goto doswitch;
#else
- c = *fmt++;
- if (c == 0)
- return (fmt - 1);
- if (c == ']')
- return (fmt);
+ c = *fmt++;
+ if (c == 0) return (fmt - 1);
+ if (c == ']') return (fmt);
#endif
- break;
+ break;
- case ']': /* end of scanset */
- return (fmt);
+ case ']': /* end of scanset */
+ return (fmt);
- default: /* just another character */
- c = n;
- break;
- }
- }
- /* NOTREACHED */
+ default: /* just another character */
+ c = n;
+ break;
+ }
+ }
+ /* NOTREACHED */
}
-int
-vfscanf(FILE *fp, const char *fmt0, __va_list ap)
-{
- int r;
+int vfscanf(FILE* fp, const char* fmt0, __va_list ap) {
+ int r;
- FLOCKFILE(fp);
- r = __svfscanf(fp, fmt0, ap);
- FUNLOCKFILE(fp);
- return (r);
+ FLOCKFILE(fp);
+ r = __svfscanf(fp, fmt0, ap);
+ FUNLOCKFILE(fp);
+ return (r);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-03 00:38:56 +0000