cannam@127: /* cannam@127: * Copyright (c) 2003, 2007-14 Matteo Frigo cannam@127: * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology cannam@127: * cannam@127: * This program is free software; you can redistribute it and/or modify cannam@127: * it under the terms of the GNU General Public License as published by cannam@127: * the Free Software Foundation; either version 2 of the License, or cannam@127: * (at your option) any later version. cannam@127: * cannam@127: * This program is distributed in the hope that it will be useful, cannam@127: * but WITHOUT ANY WARRANTY; without even the implied warranty of cannam@127: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the cannam@127: * GNU General Public License for more details. cannam@127: * cannam@127: * You should have received a copy of the GNU General Public License cannam@127: * along with this program; if not, write to the Free Software cannam@127: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA cannam@127: * cannam@127: */ cannam@127: cannam@127: cannam@127: #include "ifftw.h" cannam@127: #include cannam@127: #include cannam@127: #include cannam@127: #include cannam@127: cannam@127: #ifdef USE_CTYPE cannam@127: #include cannam@127: #else cannam@127: /* Screw ctype. On linux, the is* functions call a routine that gets cannam@127: the ctype map in the current locale. Because this operation is cannam@127: expensive, the map is cached on a per-thread basis. I am not cannam@127: willing to link this crap with FFTW. Not over my dead body. cannam@127: cannam@127: Sic transit gloria mundi. cannam@127: */ cannam@127: #undef isspace cannam@127: #define isspace(x) ((x) >= 0 && (x) <= ' ') cannam@127: #undef isdigit cannam@127: #define isdigit(x) ((x) >= '0' && (x) <= '9') cannam@127: #undef isupper cannam@127: #define isupper(x) ((x) >= 'A' && (x) <= 'Z') cannam@127: #undef islower cannam@127: #define islower(x) ((x) >= 'a' && (x) <= 'z') cannam@127: #endif cannam@127: cannam@127: static int mygetc(scanner *sc) cannam@127: { cannam@127: if (sc->ungotc != EOF) { cannam@127: int c = sc->ungotc; cannam@127: sc->ungotc = EOF; cannam@127: return c; cannam@127: } cannam@127: return(sc->getchr(sc)); cannam@127: } cannam@127: cannam@127: #define GETCHR(sc) mygetc(sc) cannam@127: cannam@127: static void myungetc(scanner *sc, int c) cannam@127: { cannam@127: sc->ungotc = c; cannam@127: } cannam@127: cannam@127: #define UNGETCHR(sc, c) myungetc(sc, c) cannam@127: cannam@127: static void eat_blanks(scanner *sc) cannam@127: { cannam@127: int ch; cannam@127: while (ch = GETCHR(sc), isspace(ch)) cannam@127: ; cannam@127: UNGETCHR(sc, ch); cannam@127: } cannam@127: cannam@127: static void mygets(scanner *sc, char *s, int maxlen) cannam@127: { cannam@127: char *s0 = s; cannam@127: int ch; cannam@127: cannam@127: A(maxlen > 0); cannam@127: while ((ch = GETCHR(sc)) != EOF && !isspace(ch) cannam@127: && ch != ')' && ch != '(' && s < s0 + maxlen) cannam@127: *s++ = (char)(ch & 0xFF); cannam@127: *s = 0; cannam@127: UNGETCHR(sc, ch); cannam@127: } cannam@127: cannam@127: static long getlong(scanner *sc, int base, int *ret) cannam@127: { cannam@127: int sign = 1, ch, count; cannam@127: long x = 0; cannam@127: cannam@127: ch = GETCHR(sc); cannam@127: if (ch == '-' || ch == '+') { cannam@127: sign = ch == '-' ? -1 : 1; cannam@127: ch = GETCHR(sc); cannam@127: } cannam@127: for (count = 0; ; ++count) { cannam@127: if (isdigit(ch)) cannam@127: ch -= '0'; cannam@127: else if (isupper(ch)) cannam@127: ch -= 'A' - 10; cannam@127: else if (islower(ch)) cannam@127: ch -= 'a' - 10; cannam@127: else cannam@127: break; cannam@127: x = x * base + ch; cannam@127: ch = GETCHR(sc); cannam@127: } cannam@127: x *= sign; cannam@127: UNGETCHR(sc, ch); cannam@127: *ret = count > 0; cannam@127: return x; cannam@127: } cannam@127: cannam@127: /* vscan is mostly scanf-like, with our additional format specifiers, cannam@127: but with a few twists. It returns simply 0 or 1 indicating whether cannam@127: the match was successful. '(' and ')' in the format string match cannam@127: those characters preceded by any whitespace. Finally, if a cannam@127: character match fails, it will ungetchr() the last character back cannam@127: onto the stream. */ cannam@127: static int vscan(scanner *sc, const char *format, va_list ap) cannam@127: { cannam@127: const char *s = format; cannam@127: char c; cannam@127: int ch = 0; cannam@127: int fmt_len; cannam@127: cannam@127: while ((c = *s++)) { cannam@127: fmt_len = 0; cannam@127: switch (c) { cannam@127: case '%': cannam@127: getformat: cannam@127: switch ((c = *s++)) { cannam@127: case 's': { cannam@127: char *x = va_arg(ap, char *); cannam@127: mygets(sc, x, fmt_len); cannam@127: break; cannam@127: } cannam@127: case 'd': { cannam@127: int *x = va_arg(ap, int *); cannam@127: *x = (int) getlong(sc, 10, &ch); cannam@127: if (!ch) return 0; cannam@127: break; cannam@127: } cannam@127: case 'x': { cannam@127: int *x = va_arg(ap, int *); cannam@127: *x = (int) getlong(sc, 16, &ch); cannam@127: if (!ch) return 0; cannam@127: break; cannam@127: } cannam@127: case 'M': { cannam@127: md5uint *x = va_arg(ap, md5uint *); cannam@127: *x = (md5uint) cannam@127: (0xFFFFFFFF & getlong(sc, 16, &ch)); cannam@127: if (!ch) return 0; cannam@127: break; cannam@127: } cannam@127: case '*': { cannam@127: if ((fmt_len = va_arg(ap, int)) <= 0) return 0; cannam@127: goto getformat; cannam@127: } cannam@127: default: cannam@127: A(0 /* unknown format */); cannam@127: break; cannam@127: } cannam@127: break; cannam@127: default: cannam@127: if (isspace(c) || c == '(' || c == ')') cannam@127: eat_blanks(sc); cannam@127: if (!isspace(c) && (ch = GETCHR(sc)) != c) { cannam@127: UNGETCHR(sc, ch); cannam@127: return 0; cannam@127: } cannam@127: break; cannam@127: } cannam@127: } cannam@127: return 1; cannam@127: } cannam@127: cannam@127: static int scan(scanner *sc, const char *format, ...) cannam@127: { cannam@127: int ret; cannam@127: va_list ap; cannam@127: va_start(ap, format); cannam@127: ret = vscan(sc, format, ap); cannam@127: va_end(ap); cannam@127: return ret; cannam@127: } cannam@127: cannam@127: scanner *X(mkscanner)(size_t size, int (*getchr)(scanner *sc)) cannam@127: { cannam@127: scanner *s = (scanner *)MALLOC(size, OTHER); cannam@127: s->scan = scan; cannam@127: s->vscan = vscan; cannam@127: s->getchr = getchr; cannam@127: s->ungotc = EOF; cannam@127: return s; cannam@127: } cannam@127: cannam@127: void X(scanner_destroy)(scanner *sc) cannam@127: { cannam@127: X(ifree)(sc); cannam@127: }