Chris@10: /* Chris@10: * Copyright (c) 2003, 2007-11 Matteo Frigo Chris@10: * Copyright (c) 2003, 2007-11 Massachusetts Institute of Technology Chris@10: * Chris@10: * This program is free software; you can redistribute it and/or modify Chris@10: * it under the terms of the GNU General Public License as published by Chris@10: * the Free Software Foundation; either version 2 of the License, or Chris@10: * (at your option) any later version. Chris@10: * Chris@10: * This program is distributed in the hope that it will be useful, Chris@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of Chris@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Chris@10: * GNU General Public License for more details. Chris@10: * Chris@10: * You should have received a copy of the GNU General Public License Chris@10: * along with this program; if not, write to the Free Software Chris@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Chris@10: * Chris@10: */ Chris@10: Chris@10: Chris@10: #include "ifftw.h" Chris@10: #include Chris@10: #include Chris@10: #include Chris@10: #include Chris@10: Chris@10: #ifdef USE_CTYPE Chris@10: #include Chris@10: #else Chris@10: /* Screw ctype. On linux, the is* functions call a routine that gets Chris@10: the ctype map in the current locale. Because this operation is Chris@10: expensive, the map is cached on a per-thread basis. I am not Chris@10: willing to link this crap with FFTW. Not over my dead body. Chris@10: Chris@10: Sic transit gloria mundi. Chris@10: */ Chris@10: #undef isspace Chris@10: #define isspace(x) ((x) >= 0 && (x) <= ' ') Chris@10: #undef isdigit Chris@10: #define isdigit(x) ((x) >= '0' && (x) <= '9') Chris@10: #undef isupper Chris@10: #define isupper(x) ((x) >= 'A' && (x) <= 'Z') Chris@10: #undef islower Chris@10: #define islower(x) ((x) >= 'a' && (x) <= 'z') Chris@10: #endif Chris@10: Chris@10: static int mygetc(scanner *sc) Chris@10: { Chris@10: if (sc->ungotc != EOF) { Chris@10: int c = sc->ungotc; Chris@10: sc->ungotc = EOF; Chris@10: return c; Chris@10: } Chris@10: return(sc->getchr(sc)); Chris@10: } Chris@10: Chris@10: #define GETCHR(sc) mygetc(sc) Chris@10: Chris@10: static void myungetc(scanner *sc, int c) Chris@10: { Chris@10: sc->ungotc = c; Chris@10: } Chris@10: Chris@10: #define UNGETCHR(sc, c) myungetc(sc, c) Chris@10: Chris@10: static void eat_blanks(scanner *sc) Chris@10: { Chris@10: int ch; Chris@10: while (ch = GETCHR(sc), isspace(ch)) Chris@10: ; Chris@10: UNGETCHR(sc, ch); Chris@10: } Chris@10: Chris@10: static void mygets(scanner *sc, char *s, size_t maxlen) Chris@10: { Chris@10: char *s0 = s; Chris@10: int ch; Chris@10: Chris@10: A(maxlen > 0); Chris@10: while ((ch = GETCHR(sc)) != EOF && !isspace(ch) Chris@10: && ch != ')' && ch != '(' && s < s0 + maxlen) Chris@10: *s++ = ch; Chris@10: *s = 0; Chris@10: UNGETCHR(sc, ch); Chris@10: } Chris@10: Chris@10: static long getlong(scanner *sc, int base, int *ret) Chris@10: { Chris@10: int sign = 1, ch, count; Chris@10: long x = 0; Chris@10: Chris@10: ch = GETCHR(sc); Chris@10: if (ch == '-' || ch == '+') { Chris@10: sign = ch == '-' ? -1 : 1; Chris@10: ch = GETCHR(sc); Chris@10: } Chris@10: for (count = 0; ; ++count) { Chris@10: if (isdigit(ch)) Chris@10: ch -= '0'; Chris@10: else if (isupper(ch)) Chris@10: ch -= 'A' - 10; Chris@10: else if (islower(ch)) Chris@10: ch -= 'a' - 10; Chris@10: else Chris@10: break; Chris@10: x = x * base + ch; Chris@10: ch = GETCHR(sc); Chris@10: } Chris@10: x *= sign; Chris@10: UNGETCHR(sc, ch); Chris@10: *ret = count > 0; Chris@10: return x; Chris@10: } Chris@10: Chris@10: /* vscan is mostly scanf-like, with our additional format specifiers, Chris@10: but with a few twists. It returns simply 0 or 1 indicating whether Chris@10: the match was successful. '(' and ')' in the format string match Chris@10: those characters preceded by any whitespace. Finally, if a Chris@10: character match fails, it will ungetchr() the last character back Chris@10: onto the stream. */ Chris@10: static int vscan(scanner *sc, const char *format, va_list ap) Chris@10: { Chris@10: const char *s = format; Chris@10: char c; Chris@10: int ch = 0; Chris@10: size_t fmt_len; Chris@10: Chris@10: while ((c = *s++)) { Chris@10: fmt_len = 0; Chris@10: switch (c) { Chris@10: case '%': Chris@10: getformat: Chris@10: switch ((c = *s++)) { Chris@10: case 's': { Chris@10: char *x = va_arg(ap, char *); Chris@10: mygets(sc, x, fmt_len); Chris@10: break; Chris@10: } Chris@10: case 'd': { Chris@10: int *x = va_arg(ap, int *); Chris@10: *x = (int) getlong(sc, 10, &ch); Chris@10: if (!ch) return 0; Chris@10: break; Chris@10: } Chris@10: case 'x': { Chris@10: int *x = va_arg(ap, int *); Chris@10: *x = (int) getlong(sc, 16, &ch); Chris@10: if (!ch) return 0; Chris@10: break; Chris@10: } Chris@10: case 'M': { Chris@10: md5uint *x = va_arg(ap, md5uint *); Chris@10: *x = (md5uint) Chris@10: (0xffffffffUL & getlong(sc, 16, &ch)); Chris@10: if (!ch) return 0; Chris@10: break; Chris@10: } Chris@10: case '*': { Chris@10: if ((fmt_len = va_arg(ap, int)) <= 0) return 0; Chris@10: goto getformat; Chris@10: } Chris@10: default: Chris@10: A(0 /* unknown format */); Chris@10: break; Chris@10: } Chris@10: break; Chris@10: default: Chris@10: if (isspace(c) || c == '(' || c == ')') Chris@10: eat_blanks(sc); Chris@10: if (!isspace(c) && (ch = GETCHR(sc)) != c) { Chris@10: UNGETCHR(sc, ch); Chris@10: return 0; Chris@10: } Chris@10: break; Chris@10: } Chris@10: } Chris@10: return 1; Chris@10: } Chris@10: Chris@10: static int scan(scanner *sc, const char *format, ...) Chris@10: { Chris@10: int ret; Chris@10: va_list ap; Chris@10: va_start(ap, format); Chris@10: ret = vscan(sc, format, ap); Chris@10: va_end(ap); Chris@10: return ret; Chris@10: } Chris@10: Chris@10: scanner *X(mkscanner)(size_t size, int (*getchr)(scanner *sc)) Chris@10: { Chris@10: scanner *s = (scanner *)MALLOC(size, OTHER); Chris@10: s->scan = scan; Chris@10: s->vscan = vscan; Chris@10: s->getchr = getchr; Chris@10: s->ungotc = EOF; Chris@10: return s; Chris@10: } Chris@10: Chris@10: void X(scanner_destroy)(scanner *sc) Chris@10: { Chris@10: X(ifree)(sc); Chris@10: }