summaryrefslogtreecommitdiff
path: root/src/stdio/__scanf.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/stdio/__scanf.c')
-rw-r--r--src/stdio/__scanf.c483
1 files changed, 0 insertions, 483 deletions
diff --git a/src/stdio/__scanf.c b/src/stdio/__scanf.c
deleted file mode 100644
index 7c82cca4..00000000
--- a/src/stdio/__scanf.c
+++ /dev/null
@@ -1,483 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <ctype.h>
-#include <wchar.h>
-#include <wctype.h>
-#include <limits.h>
-#include <string.h>
-#include <errno.h>
-#include <math.h>
-#include <float.h>
-
-#include "__scanf.h"
-
-static int read(rctx_t *r)
-{
- if (--r->w < 0) return r->w = -1;
- if (r->u) r->u = 0;
- else r->read(r);
- return r->c;
-}
-
-static void unread(rctx_t *r)
-{
- if (r->c < 0 || r->w < 0) return;
- r->w++;
- r->u = 1;
-}
-
-#define SIZE_hh -2
-#define SIZE_h -1
-#define SIZE_def 0
-#define SIZE_l 1
-#define SIZE_ll 2
-#define SIZE_L 3
-
-static void store_int(void *dest, int size, int neg, unsigned long long i)
-{
- if (!dest) return;
- if (neg) i = -i;
- switch (size) {
- case SIZE_hh:
- *(char *)dest = i;
- break;
- case SIZE_h:
- *(short *)dest = i;
- break;
- case SIZE_def:
- *(int *)dest = i;
- break;
- case SIZE_l:
- *(long *)dest = i;
- break;
- case SIZE_ll:
- *(long long *)dest = i;
- break;
- }
-}
-
-static void *arg_n(va_list ap, unsigned int n)
-{
- void *p;
- unsigned int i;
- va_list ap2;
- va_copy(ap2, ap);
- for (i=n; i>1; i--) va_arg(ap2, void *);
- p = va_arg(ap2, void *);
- va_end(ap2);
- return p;
-}
-
-int __scanf(rctx_t *r, const wchar_t *fmt, va_list ap)
-{
- int mode=0;
- int width;
- int size;
- const wchar_t *p, *z;
- int c, l, t, m;
- long long dummy;
- char *s;
- wchar_t *wcs;
- mbstate_t st;
- int wide = r->wide;
- void *dest=NULL;
- int invert;
- unsigned long long i=0;
- int neg=0;
- int matches=0;
- long double f;
- int (*is_space)(int) = r->is_space;
-
- for (p=fmt; *p; ) {
- if (is_space(*p)) {
- do p++; while (is_space(*p));
- do r->w=1; while (is_space(read(r)));
- unread(r);
- continue;
- } else if (*p != '%' || p[1] == '%') {
- if (*p == '%') p++;
- r->w = 1;
- if ((c = read(r)) < 0)
- goto input_fail;
- if (*p++ != c)
- goto match_fail;
- continue;
- }
- p++;
- if (mode != 1) {
- for (z=p; isdigit(*z); z++);
- if (*z != '$' && *z != '*') {
- if (mode == 0) mode = 1;
- else goto fmt_fail;
- } else if (*z != '*') {
- int pos = 0;
- mode = 2;
- for (; p<z; p++) {
- pos = 10*pos + *p - '0';
- }
- p++;
- if (!pos) goto fmt_fail;
- dest = arg_n(ap, pos);
- }
- }
- if (*p == '*') {
- dest = NULL;
- p++;
- } else if (mode == 1) {
- dest = va_arg(ap, void *);
- }
-
- if (!*p) goto fmt_fail;
-
- width = 0;
- for (; isdigit(*p); p++) {
- width = 10*width + *p - '0';
- }
-
- size = 0;
- switch (*p++) {
- case 0:
- goto fmt_fail;
- case 'h':
- if (*p == 'h') p++, size = SIZE_hh;
- else size = SIZE_h;
- break;
- case 'l':
- if (*p == 'l') p++, size = SIZE_ll;
- else size = SIZE_l;
- break;
- case 'j':
- size = SIZE_ll;
- break;
- case 'z':
- case 't':
- size = SIZE_l;
- break;
- case 'L':
- size = SIZE_L;
- break;
- case 'd': case 'i': case 'o': case 'u': case 'x':
- case 'a': case 'e': case 'f': case 'g':
- case 'A': case 'E': case 'F': case 'G': case 'X':
- case 's': case 'c': case '[':
- case 'S': case 'C':
- case 'p': case 'n':
- p--;
- break;
- default:
- goto fmt_fail;
- }
-
- t = *p++;
-
- switch (t) {
- case 'C':
- case 'c':
- if (width < 1) width = 1;
- case 's':
- if (size == SIZE_l) t &= ~0x20;
- case 'd': case 'i': case 'o': case 'u': case 'x':
- case 'a': case 'e': case 'f': case 'g':
- case 'A': case 'E': case 'F': case 'G': case 'X':
- case '[': case 'S':
- case 'p': case 'n':
- if (width < 1) width = INT_MAX;
- break;
- default:
- goto fmt_fail;
- }
-
- r->w = width;
-
- if (t != 'n') {
- if (read(r) < 0) goto input_fail;
- unread(r);
- }
-
- switch (t) {
- case 'n':
- store_int(dest, size, 0, r->l - r->u);
- /* do not increment match count, etc! */
- continue;
- case 'C':
- wcs = dest ? dest : (void *)&dummy;
- st = (mbstate_t){ 0 };
- while ((c=read(r)) >= 0) {
- if (wide) {
- if (dest) *wcs++ = c;
- } else {
- char ch = c;
- switch (mbrtowc(wcs, &ch, 1, &st)) {
- case -1:
- goto enc_fail;
- case -2:
- break;
- default:
- if (dest) wcs++;
- }
- }
- }
- if (r->w > 0) goto match_fail;
- break;
- case 'c':
- s = dest ? dest : (void *)&dummy;
- while ((c=read(r)) >= 0) {
- if (wide) {
- if ((l=wctomb(s, c)) < 0)
- goto enc_fail;
- if (dest) s += l;
- } else {
- if (dest) *s++ = c;
- }
- }
- if (r->w > 0) goto match_fail;
- break;
- case '[':
- wcs = dest ? dest : (void *)&dummy;
- s = dest ? dest : (void *)&dummy;
- if (!wide && size == SIZE_l) st = (mbstate_t){ 0 };
-
- if (*p == '^') p++, invert = 1;
- else invert = 0;
-
- if (wide) {
- for (m=0; (c=read(r)) >= 0; m=1) {
- for (z=p; *z && *z != c && (*z != ']' || z==p); z++);
- if (!*z) goto fmt_fail;
- if (*z == c && (*z != ']' || z==p)) {
- if (invert) break;
- } else {
- if (!invert) break;
- }
- if (size == SIZE_l) {
- if (dest) *wcs++ = c;
- } else {
- if ((l=wctomb(s, c)) < 0)
- goto enc_fail;
- if (dest) s += l;
- }
- }
- for (p++; *p && *p != ']'; p++);
- p++;
- } else {
- unsigned char scanset[257];
- memset(scanset, invert, sizeof scanset);
- scanset[0] = 0;
- for (z=p; *z && (*z != ']' || z==p); z++)
- scanset[1+*z] = 1-invert;
- if (!*z) goto fmt_fail;
- p=z+1;
- c=0;
- for (m=0; scanset[(c=read(r))+1]; m=1) {
- if (size == SIZE_l) {
- char ch = c;
- switch (mbrtowc(wcs, &ch, 1, &st)) {
- case -1:
- goto enc_fail;
- case -2:
- break;
- default:
- if (dest) wcs++;
- }
- } else {
- if (dest) *s++ = c;
- }
- }
- }
- if (!m) goto match_fail;
- if (dest) {
- if (size == SIZE_l) *wcs++ = 0;
- else *s++ = 0;
- }
- break;
- default:
- /* read unlimited number of spaces, then reset width */
- do r->w = 1; while (is_space(c = read(r)));
- if (c < 0) goto input_fail;
- unread(r);
- r->w = width;
- }
-
- switch (t) {
- case 'p':
- case 'X':
- t = 'x';
- case 'd':
- case 'i':
- case 'o':
- case 'u':
- case 'x':
- i = m = neg = 0;
- if ((c=read(r)) == '-') neg=1;
- else if (c != '+') unread(r);
- switch (t) {
- case 'i':
- case 'x':
- if ((c=read(r)) != '0') {
- if (t == 'i') t = 'd';
- unread(r);
- break;
- }
- m = 1;
- if (((c=read(r))|0x20) != 'x') {
- if (t == 'i') t = 'o';
- unread(r);
- break;
- }
- t = 'x';
- m = 0;
- }
- }
-
- switch (t) {
- case 'd':
- case 'u':
- for (; isdigit(c=read(r)); m=1)
- i = 10*i + c-'0';
- goto int_finish;
- case 'o':
- for (; (unsigned)(c=read(r))-'0' < 8; m=1)
- i = (i<<3) + c-'0';
- goto int_finish;
- case 'x':
- for (; ; m=1) {
- if (isdigit(c=read(r))) {
- i = (i<<4) + c-'0';
- } else if ((unsigned)(c|0x20)-'a' < 6) {
- i = (i<<4) + (c|0x20)-'a'+10;
- } else break;
- }
- int_finish:
- if (!m) goto match_fail;
- store_int(dest, size, neg, i);
- break;
- case 'a':
- case 'e':
- case 'f':
- case 'g':
- f = 0.0;
- neg = m = 0;
- if ((c=read(r)) == '-') neg=1;
- else if (c != '+') unread(r);
- /* FIXME: check for INF/NAN strings here */
- if (read(r)=='0' && (m=1, (read(r)|0x20) == 'x'))
- goto hexfloat;
- else unread(r);
- for (; isdigit(c=read(r)); m=1)
- f = 10.0 * f + (c-'0');
- if (c=='.') {
- double mag = 10.0;
- for (; isdigit(c=read(r)); mag*=10.0)
- f += (c-'0')/mag;
- }
- if ((c|0x20)=='e') {
- int ex=0, en=0;
- m = 0;
- if ((c=read(r))=='-') en=1;
- else if (c!='+') unread(r);
- for (; isdigit(c=read(r)); m=1)
- if (ex < LDBL_MAX_10_EXP)
- ex = 10 * ex + (c-'0');
- if (ex > LDBL_MAX_10_EXP)
- f = en ? 0 : INFINITY;
- else {
- if (en) while (ex--) f/=10.0;
- else while (ex--) f*=10.0;
- }
- }
- goto writefloat;
-hexfloat:
- m = 0;
- for (; isxdigit(c=read(r)); m=1)
- if (isdigit(c)) f = 16.0*f + (c-'0');
- else f = 16.0*f + ((c|32)-'a'+10);
- if (c=='.') {
- double mag = 1/16.0;
- for (; isxdigit(c=read(r)); mag*=1/16.0)
- if (isdigit(c)) f += (c-'0')*mag;
- else f += ((c|32)-'a'+10)*mag;
- }
- if ((c|0x20)=='p') {
- int ex=0, en=0;
- m = 0;
- if ((c=read(r))=='-') en=1;
- else if (c!='+') unread(r);
- for (; isdigit(c=read(r)); m=1)
- if (ex < LDBL_MAX_EXP)
- ex = 10 * ex + (c-'0');
- if (ex > LDBL_MAX_EXP)
- f = en ? 0 : INFINITY;
- else {
- if (en) while (ex--) f*=0.5;
- else while (ex--) f*=2.0;
- }
- }
-writefloat:
- if (!m) goto match_fail;
- if (neg) f *= -1.0;
- if (dest) switch (size) {
- case SIZE_def:
- *(float *)dest = f;
- break;
- case SIZE_l:
- *(double *)dest = f;
- break;
- case SIZE_L:
- *(long double *)dest = f;
- break;
- }
- break;
- case 'S':
- wcs = dest ? dest : (void *)&dummy;
- st = (mbstate_t){ 0 };
- while((c=read(r)) >= 0) {
- if (wide) {
- if (is_space(c)) break;
- if (dest) *wcs++ = c;
- } else {
- char ch = c;
- if (is_space(c)) break;
- switch (mbrtowc(wcs, &ch, 1, &st)) {
- case -1:
- goto enc_fail;
- case -2:
- break;
- default:
- if (dest) wcs++;
- }
- }
- }
- if (dest) *wcs++ = 0;
- break;
- case 's':
- s = dest ? dest : (void *)&dummy;
- while((c=read(r)) >= 0) {
- if (wide) {
- if (is_space(c)) break;
- if ((l=wctomb(s, c)) < 0)
- goto enc_fail;
- if (dest) s += l;
- } else {
- if (is_space(c)) break;
- if (dest) *s++ = c;
- }
- }
- if (dest) *s++ = 0;
- break;
- }
-
- /* unread will do nothing if field width was exhausted */
- unread(r);
- if (dest) matches++;
- }
- return matches;
-enc_fail:
- errno = EILSEQ;
-fmt_fail:
-input_fail:
- if (!matches) matches--;
-match_fail:
- unread(r);
- return matches;
-}
generated by cgit v1.2.1 (git 2.18.0) at 2024-04-24 23:22:34 +0000