Initial commit from HTC m7ul-3.4.10-jb-crc-ddcfb8c
diff --git a/scripts/unifdef.c b/scripts/unifdef.c
new file mode 100644
index 0000000..08e234d
--- /dev/null
+++ b/scripts/unifdef.c
@@ -0,0 +1,1062 @@
+/*
+ * Copyright (c) 2002 - 2011 Tony Finch <dot@dotat.at>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * unifdef - remove ifdef'ed lines
+ *
+ * This code was derived from software contributed to Berkeley by Dave Yost.
+ * It was rewritten to support ANSI C by Tony Finch. The original version
+ * of unifdef carried the 4-clause BSD copyright licence. None of its code
+ * remains in this version (though some of the names remain) so it now
+ * carries a more liberal licence.
+ *
+ * Wishlist:
+ * provide an option which will append the name of the
+ * appropriate symbol after #else's and #endif's
+ * provide an option which will check symbols after
+ * #else's and #endif's to see that they match their
+ * corresponding #ifdef or #ifndef
+ *
+ * These require better buffer handling, which would also make
+ * it possible to handle all "dodgy" directives correctly.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+const char copyright[] =
+ "@(#) $Version: unifdef-2.5 $\n"
+ "@(#) $Author: Tony Finch (dot@dotat.at) $\n"
+ "@(#) $URL: http://dotat.at/prog/unifdef $\n"
+;
+
+typedef enum {
+ LT_TRUEI,
+ LT_FALSEI,
+ LT_IF,
+ LT_TRUE,
+ LT_FALSE,
+ LT_ELIF,
+ LT_ELTRUE,
+ LT_ELFALSE,
+ LT_ELSE,
+ LT_ENDIF,
+ LT_DODGY,
+ LT_DODGY_LAST = LT_DODGY + LT_ENDIF,
+ LT_PLAIN,
+ LT_EOF,
+ LT_ERROR,
+ LT_COUNT
+} Linetype;
+
+static char const * const linetype_name[] = {
+ "TRUEI", "FALSEI", "IF", "TRUE", "FALSE",
+ "ELIF", "ELTRUE", "ELFALSE", "ELSE", "ENDIF",
+ "DODGY TRUEI", "DODGY FALSEI",
+ "DODGY IF", "DODGY TRUE", "DODGY FALSE",
+ "DODGY ELIF", "DODGY ELTRUE", "DODGY ELFALSE",
+ "DODGY ELSE", "DODGY ENDIF",
+ "PLAIN", "EOF", "ERROR"
+};
+
+typedef enum {
+ IS_OUTSIDE,
+ IS_FALSE_PREFIX,
+ IS_TRUE_PREFIX,
+ IS_PASS_MIDDLE,
+ IS_FALSE_MIDDLE,
+ IS_TRUE_MIDDLE,
+ IS_PASS_ELSE,
+ IS_FALSE_ELSE,
+ IS_TRUE_ELSE,
+ IS_FALSE_TRAILER,
+ IS_COUNT
+} Ifstate;
+
+static char const * const ifstate_name[] = {
+ "OUTSIDE", "FALSE_PREFIX", "TRUE_PREFIX",
+ "PASS_MIDDLE", "FALSE_MIDDLE", "TRUE_MIDDLE",
+ "PASS_ELSE", "FALSE_ELSE", "TRUE_ELSE",
+ "FALSE_TRAILER"
+};
+
+typedef enum {
+ NO_COMMENT = false,
+ C_COMMENT,
+ CXX_COMMENT,
+ STARTING_COMMENT,
+ FINISHING_COMMENT,
+ CHAR_LITERAL,
+ STRING_LITERAL
+} Comment_state;
+
+static char const * const comment_name[] = {
+ "NO", "C", "CXX", "STARTING", "FINISHING", "CHAR", "STRING"
+};
+
+typedef enum {
+ LS_START,
+ LS_HASH,
+ LS_DIRTY
+} Line_state;
+
+static char const * const linestate_name[] = {
+ "START", "HASH", "DIRTY"
+};
+
+#define MAXDEPTH 64
+#define MAXLINE 4096
+#define MAXSYMS 4096
+
+#define EDITSLOP 10
+
+#define TEMPLATE "unifdef.XXXXXX"
+
+
+static bool compblank;
+static bool lnblank;
+static bool complement;
+static bool debugging;
+static bool iocccok;
+static bool strictlogic;
+static bool killconsts;
+static bool lnnum;
+static bool symlist;
+static bool symdepth;
+static bool text;
+
+static const char *symname[MAXSYMS];
+static const char *value[MAXSYMS];
+static bool ignore[MAXSYMS];
+static int nsyms;
+
+static FILE *input;
+static const char *filename;
+static int linenum;
+static FILE *output;
+static const char *ofilename;
+static bool overwriting;
+static char tempname[FILENAME_MAX];
+
+static char tline[MAXLINE+EDITSLOP];
+static char *keyword;
+
+static const char *newline;
+static const char newline_unix[] = "\n";
+static const char newline_crlf[] = "\r\n";
+
+static Comment_state incomment;
+static Line_state linestate;
+static Ifstate ifstate[MAXDEPTH];
+static bool ignoring[MAXDEPTH];
+static int stifline[MAXDEPTH];
+static int depth;
+static int delcount;
+static unsigned blankcount;
+static unsigned blankmax;
+static bool constexpr;
+static bool zerosyms = true;
+static bool firstsym;
+
+static int exitstat;
+
+static void addsym(bool, bool, char *);
+static void closeout(void);
+static void debug(const char *, ...);
+static void done(void);
+static void error(const char *);
+static int findsym(const char *);
+static void flushline(bool);
+static Linetype parseline(void);
+static Linetype ifeval(const char **);
+static void ignoreoff(void);
+static void ignoreon(void);
+static void keywordedit(const char *);
+static void nest(void);
+static void process(void);
+static const char *skipargs(const char *);
+static const char *skipcomment(const char *);
+static const char *skipsym(const char *);
+static void state(Ifstate);
+static int strlcmp(const char *, const char *, size_t);
+static void unnest(void);
+static void usage(void);
+static void version(void);
+
+#define endsym(c) (!isalnum((unsigned char)c) && c != '_')
+
+int
+main(int argc, char *argv[])
+{
+ int opt;
+
+ while ((opt = getopt(argc, argv, "i:D:U:I:o:bBcdeKklnsStV")) != -1)
+ switch (opt) {
+ case 'i':
+ opt = *optarg++;
+ if (opt == 'D')
+ addsym(true, true, optarg);
+ else if (opt == 'U')
+ addsym(true, false, optarg);
+ else
+ usage();
+ break;
+ case 'D':
+ addsym(false, true, optarg);
+ break;
+ case 'U':
+ addsym(false, false, optarg);
+ break;
+ case 'I':
+ break;
+ case 'b':
+ case 'l':
+ lnblank = true;
+ break;
+ case 'B':
+ compblank = true;
+ break;
+ case 'c':
+ complement = true;
+ break;
+ case 'd':
+ debugging = true;
+ break;
+ case 'e':
+ iocccok = true;
+ break;
+ case 'K':
+ strictlogic = true;
+ break;
+ case 'k':
+ killconsts = true;
+ break;
+ case 'n':
+ lnnum = true;
+ break;
+ case 'o':
+ ofilename = optarg;
+ break;
+ case 's':
+ symlist = true;
+ break;
+ case 'S':
+ symlist = symdepth = true;
+ break;
+ case 't':
+ text = true;
+ break;
+ case 'V':
+ version();
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+ if (compblank && lnblank)
+ errx(2, "-B and -b are mutually exclusive");
+ if (argc > 1) {
+ errx(2, "can only do one file");
+ } else if (argc == 1 && strcmp(*argv, "-") != 0) {
+ filename = *argv;
+ input = fopen(filename, "rb");
+ if (input == NULL)
+ err(2, "can't open %s", filename);
+ } else {
+ filename = "[stdin]";
+ input = stdin;
+ }
+ if (ofilename == NULL) {
+ ofilename = "[stdout]";
+ output = stdout;
+ } else {
+ struct stat ist, ost;
+ if (stat(ofilename, &ost) == 0 &&
+ fstat(fileno(input), &ist) == 0)
+ overwriting = (ist.st_dev == ost.st_dev
+ && ist.st_ino == ost.st_ino);
+ if (overwriting) {
+ const char *dirsep;
+ int ofd;
+
+ dirsep = strrchr(ofilename, '/');
+ if (dirsep != NULL)
+ snprintf(tempname, sizeof(tempname),
+ "%.*s/" TEMPLATE,
+ (int)(dirsep - ofilename), ofilename);
+ else
+ snprintf(tempname, sizeof(tempname),
+ TEMPLATE);
+ ofd = mkstemp(tempname);
+ if (ofd != -1)
+ output = fdopen(ofd, "wb+");
+ if (output == NULL)
+ err(2, "can't create temporary file");
+ fchmod(ofd, ist.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO));
+ } else {
+ output = fopen(ofilename, "wb");
+ if (output == NULL)
+ err(2, "can't open %s", ofilename);
+ }
+ }
+ process();
+ abort();
+}
+
+static void
+version(void)
+{
+ const char *c = copyright;
+ for (;;) {
+ while (*++c != '$')
+ if (*c == '\0')
+ exit(0);
+ while (*++c != '$')
+ putc(*c, stderr);
+ putc('\n', stderr);
+ }
+}
+
+static void
+usage(void)
+{
+ fprintf(stderr, "usage: unifdef [-bBcdeKknsStV] [-Ipath]"
+ " [-Dsym[=val]] [-Usym] [-iDsym[=val]] [-iUsym] ... [file]\n");
+ exit(2);
+}
+
+typedef void state_fn(void);
+
+static void Eelif (void) { error("Inappropriate #elif"); }
+static void Eelse (void) { error("Inappropriate #else"); }
+static void Eendif(void) { error("Inappropriate #endif"); }
+static void Eeof (void) { error("Premature EOF"); }
+static void Eioccc(void) { error("Obfuscated preprocessor control line"); }
+static void print (void) { flushline(true); }
+static void drop (void) { flushline(false); }
+static void Strue (void) { drop(); ignoreoff(); state(IS_TRUE_PREFIX); }
+static void Sfalse(void) { drop(); ignoreoff(); state(IS_FALSE_PREFIX); }
+static void Selse (void) { drop(); state(IS_TRUE_ELSE); }
+static void Pelif (void) { print(); ignoreoff(); state(IS_PASS_MIDDLE); }
+static void Pelse (void) { print(); state(IS_PASS_ELSE); }
+static void Pendif(void) { print(); unnest(); }
+static void Dfalse(void) { drop(); ignoreoff(); state(IS_FALSE_TRAILER); }
+static void Delif (void) { drop(); ignoreoff(); state(IS_FALSE_MIDDLE); }
+static void Delse (void) { drop(); state(IS_FALSE_ELSE); }
+static void Dendif(void) { drop(); unnest(); }
+static void Fdrop (void) { nest(); Dfalse(); }
+static void Fpass (void) { nest(); Pelif(); }
+static void Ftrue (void) { nest(); Strue(); }
+static void Ffalse(void) { nest(); Sfalse(); }
+static void Oiffy (void) { if (!iocccok) Eioccc(); Fpass(); ignoreon(); }
+static void Oif (void) { if (!iocccok) Eioccc(); Fpass(); }
+static void Oelif (void) { if (!iocccok) Eioccc(); Pelif(); }
+static void Idrop (void) { Fdrop(); ignoreon(); }
+static void Itrue (void) { Ftrue(); ignoreon(); }
+static void Ifalse(void) { Ffalse(); ignoreon(); }
+static void Mpass (void) { strncpy(keyword, "if ", 4); Pelif(); }
+static void Mtrue (void) { keywordedit("else"); state(IS_TRUE_MIDDLE); }
+static void Melif (void) { keywordedit("endif"); state(IS_FALSE_TRAILER); }
+static void Melse (void) { keywordedit("endif"); state(IS_FALSE_ELSE); }
+
+static state_fn * const trans_table[IS_COUNT][LT_COUNT] = {
+{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Eendif,
+ Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Eendif,
+ print, done, abort },
+{ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Mpass, Strue, Sfalse,Selse, Dendif,
+ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Mpass, Eioccc,Eioccc,Eioccc,Eioccc,
+ drop, Eeof, abort },
+{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Dfalse,Dfalse,Dfalse,Delse, Dendif,
+ Oiffy, Oiffy, Fpass, Oif, Oif, Eioccc,Eioccc,Eioccc,Eioccc,Eioccc,
+ print, Eeof, abort },
+{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Pelif, Mtrue, Delif, Pelse, Pendif,
+ Oiffy, Oiffy, Fpass, Oif, Oif, Pelif, Oelif, Oelif, Pelse, Pendif,
+ print, Eeof, abort },
+{ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Pelif, Mtrue, Delif, Pelse, Pendif,
+ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eioccc,Eioccc,Eioccc,Eioccc,Eioccc,
+ drop, Eeof, abort },
+{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Melif, Melif, Melif, Melse, Pendif,
+ Oiffy, Oiffy, Fpass, Oif, Oif, Eioccc,Eioccc,Eioccc,Eioccc,Pendif,
+ print, Eeof, abort },
+{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Pendif,
+ Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Pendif,
+ print, Eeof, abort },
+{ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eelif, Eelif, Eelif, Eelse, Dendif,
+ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eelif, Eelif, Eelif, Eelse, Eioccc,
+ drop, Eeof, abort },
+{ Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Dendif,
+ Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Eioccc,
+ print, Eeof, abort },
+{ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Dfalse,Dfalse,Dfalse,Delse, Dendif,
+ Idrop, Idrop, Fdrop, Fdrop, Fdrop, Dfalse,Dfalse,Dfalse,Delse, Eioccc,
+ drop, Eeof, abort }
+};
+
+static void
+ignoreoff(void)
+{
+ if (depth == 0)
+ abort();
+ ignoring[depth] = ignoring[depth-1];
+}
+static void
+ignoreon(void)
+{
+ ignoring[depth] = true;
+}
+static void
+keywordedit(const char *replacement)
+{
+ snprintf(keyword, tline + sizeof(tline) - keyword,
+ "%s%s", replacement, newline);
+ print();
+}
+static void
+nest(void)
+{
+ if (depth > MAXDEPTH-1)
+ abort();
+ if (depth == MAXDEPTH-1)
+ error("Too many levels of nesting");
+ depth += 1;
+ stifline[depth] = linenum;
+}
+static void
+unnest(void)
+{
+ if (depth == 0)
+ abort();
+ depth -= 1;
+}
+static void
+state(Ifstate is)
+{
+ ifstate[depth] = is;
+}
+
+static void
+flushline(bool keep)
+{
+ if (symlist)
+ return;
+ if (keep ^ complement) {
+ bool blankline = tline[strspn(tline, " \t\r\n")] == '\0';
+ if (blankline && compblank && blankcount != blankmax) {
+ delcount += 1;
+ blankcount += 1;
+ } else {
+ if (lnnum && delcount > 0)
+ printf("#line %d%s", linenum, newline);
+ fputs(tline, output);
+ delcount = 0;
+ blankmax = blankcount = blankline ? blankcount + 1 : 0;
+ }
+ } else {
+ if (lnblank)
+ fputs(newline, output);
+ exitstat = 1;
+ delcount += 1;
+ blankcount = 0;
+ }
+ if (debugging)
+ fflush(output);
+}
+
+static void
+process(void)
+{
+ blankmax = blankcount = 1000;
+ for (;;) {
+ Linetype lineval = parseline();
+ trans_table[ifstate[depth]][lineval]();
+ debug("process line %d %s -> %s depth %d",
+ linenum, linetype_name[lineval],
+ ifstate_name[ifstate[depth]], depth);
+ }
+}
+
+static void
+closeout(void)
+{
+ if (symdepth && !zerosyms)
+ printf("\n");
+ if (fclose(output) == EOF) {
+ warn("couldn't write to %s", ofilename);
+ if (overwriting) {
+ unlink(tempname);
+ errx(2, "%s unchanged", filename);
+ } else {
+ exit(2);
+ }
+ }
+}
+
+static void
+done(void)
+{
+ if (incomment)
+ error("EOF in comment");
+ closeout();
+ if (overwriting && rename(tempname, ofilename) == -1) {
+ warn("couldn't rename temporary file");
+ unlink(tempname);
+ errx(2, "%s unchanged", ofilename);
+ }
+ exit(exitstat);
+}
+
+static Linetype
+parseline(void)
+{
+ const char *cp;
+ int cursym;
+ int kwlen;
+ Linetype retval;
+ Comment_state wascomment;
+
+ linenum++;
+ if (fgets(tline, MAXLINE, input) == NULL)
+ return (LT_EOF);
+ if (newline == NULL) {
+ if (strrchr(tline, '\n') == strrchr(tline, '\r') + 1)
+ newline = newline_crlf;
+ else
+ newline = newline_unix;
+ }
+ retval = LT_PLAIN;
+ wascomment = incomment;
+ cp = skipcomment(tline);
+ if (linestate == LS_START) {
+ if (*cp == '#') {
+ linestate = LS_HASH;
+ firstsym = true;
+ cp = skipcomment(cp + 1);
+ } else if (*cp != '\0')
+ linestate = LS_DIRTY;
+ }
+ if (!incomment && linestate == LS_HASH) {
+ keyword = tline + (cp - tline);
+ cp = skipsym(cp);
+ kwlen = cp - keyword;
+
+ if (strncmp(cp, "\\\r\n", 3) == 0 ||
+ strncmp(cp, "\\\n", 2) == 0)
+ Eioccc();
+ if (strlcmp("ifdef", keyword, kwlen) == 0 ||
+ strlcmp("ifndef", keyword, kwlen) == 0) {
+ cp = skipcomment(cp);
+ if ((cursym = findsym(cp)) < 0)
+ retval = LT_IF;
+ else {
+ retval = (keyword[2] == 'n')
+ ? LT_FALSE : LT_TRUE;
+ if (value[cursym] == NULL)
+ retval = (retval == LT_TRUE)
+ ? LT_FALSE : LT_TRUE;
+ if (ignore[cursym])
+ retval = (retval == LT_TRUE)
+ ? LT_TRUEI : LT_FALSEI;
+ }
+ cp = skipsym(cp);
+ } else if (strlcmp("if", keyword, kwlen) == 0)
+ retval = ifeval(&cp);
+ else if (strlcmp("elif", keyword, kwlen) == 0)
+ retval = ifeval(&cp) - LT_IF + LT_ELIF;
+ else if (strlcmp("else", keyword, kwlen) == 0)
+ retval = LT_ELSE;
+ else if (strlcmp("endif", keyword, kwlen) == 0)
+ retval = LT_ENDIF;
+ else {
+ linestate = LS_DIRTY;
+ retval = LT_PLAIN;
+ }
+ cp = skipcomment(cp);
+ if (*cp != '\0') {
+ linestate = LS_DIRTY;
+ if (retval == LT_TRUE || retval == LT_FALSE ||
+ retval == LT_TRUEI || retval == LT_FALSEI)
+ retval = LT_IF;
+ if (retval == LT_ELTRUE || retval == LT_ELFALSE)
+ retval = LT_ELIF;
+ }
+ if (retval != LT_PLAIN && (wascomment || incomment)) {
+ retval += LT_DODGY;
+ if (incomment)
+ linestate = LS_DIRTY;
+ }
+ if (linestate == LS_HASH) {
+ size_t len = cp - tline;
+ if (fgets(tline + len, MAXLINE - len, input) == NULL) {
+
+ strcpy(tline + len, newline);
+ cp += strlen(newline);
+ linestate = LS_START;
+ } else {
+ linestate = LS_DIRTY;
+ }
+ }
+ }
+ if (linestate == LS_DIRTY) {
+ while (*cp != '\0')
+ cp = skipcomment(cp + 1);
+ }
+ debug("parser line %d state %s comment %s line", linenum,
+ comment_name[incomment], linestate_name[linestate]);
+ return (retval);
+}
+
+static Linetype op_strict(int *p, int v, Linetype at, Linetype bt) {
+ if(at == LT_IF || bt == LT_IF) return (LT_IF);
+ return (*p = v, v ? LT_TRUE : LT_FALSE);
+}
+static Linetype op_lt(int *p, Linetype at, int a, Linetype bt, int b) {
+ return op_strict(p, a < b, at, bt);
+}
+static Linetype op_gt(int *p, Linetype at, int a, Linetype bt, int b) {
+ return op_strict(p, a > b, at, bt);
+}
+static Linetype op_le(int *p, Linetype at, int a, Linetype bt, int b) {
+ return op_strict(p, a <= b, at, bt);
+}
+static Linetype op_ge(int *p, Linetype at, int a, Linetype bt, int b) {
+ return op_strict(p, a >= b, at, bt);
+}
+static Linetype op_eq(int *p, Linetype at, int a, Linetype bt, int b) {
+ return op_strict(p, a == b, at, bt);
+}
+static Linetype op_ne(int *p, Linetype at, int a, Linetype bt, int b) {
+ return op_strict(p, a != b, at, bt);
+}
+static Linetype op_or(int *p, Linetype at, int a, Linetype bt, int b) {
+ if (!strictlogic && (at == LT_TRUE || bt == LT_TRUE))
+ return (*p = 1, LT_TRUE);
+ return op_strict(p, a || b, at, bt);
+}
+static Linetype op_and(int *p, Linetype at, int a, Linetype bt, int b) {
+ if (!strictlogic && (at == LT_FALSE || bt == LT_FALSE))
+ return (*p = 0, LT_FALSE);
+ return op_strict(p, a && b, at, bt);
+}
+
+struct ops;
+
+typedef Linetype eval_fn(const struct ops *, int *, const char **);
+
+static eval_fn eval_table, eval_unary;
+
+static const struct ops {
+ eval_fn *inner;
+ struct op {
+ const char *str;
+ Linetype (*fn)(int *, Linetype, int, Linetype, int);
+ } op[5];
+} eval_ops[] = {
+ { eval_table, { { "||", op_or } } },
+ { eval_table, { { "&&", op_and } } },
+ { eval_table, { { "==", op_eq },
+ { "!=", op_ne } } },
+ { eval_unary, { { "<=", op_le },
+ { ">=", op_ge },
+ { "<", op_lt },
+ { ">", op_gt } } }
+};
+
+static Linetype
+eval_unary(const struct ops *ops, int *valp, const char **cpp)
+{
+ const char *cp;
+ char *ep;
+ int sym;
+ bool defparen;
+ Linetype lt;
+
+ cp = skipcomment(*cpp);
+ if (*cp == '!') {
+ debug("eval%d !", ops - eval_ops);
+ cp++;
+ lt = eval_unary(ops, valp, &cp);
+ if (lt == LT_ERROR)
+ return (LT_ERROR);
+ if (lt != LT_IF) {
+ *valp = !*valp;
+ lt = *valp ? LT_TRUE : LT_FALSE;
+ }
+ } else if (*cp == '(') {
+ cp++;
+ debug("eval%d (", ops - eval_ops);
+ lt = eval_table(eval_ops, valp, &cp);
+ if (lt == LT_ERROR)
+ return (LT_ERROR);
+ cp = skipcomment(cp);
+ if (*cp++ != ')')
+ return (LT_ERROR);
+ } else if (isdigit((unsigned char)*cp)) {
+ debug("eval%d number", ops - eval_ops);
+ *valp = strtol(cp, &ep, 0);
+ if (ep == cp)
+ return (LT_ERROR);
+ lt = *valp ? LT_TRUE : LT_FALSE;
+ cp = skipsym(cp);
+ } else if (strncmp(cp, "defined", 7) == 0 && endsym(cp[7])) {
+ cp = skipcomment(cp+7);
+ debug("eval%d defined", ops - eval_ops);
+ if (*cp == '(') {
+ cp = skipcomment(cp+1);
+ defparen = true;
+ } else {
+ defparen = false;
+ }
+ sym = findsym(cp);
+ if (sym < 0) {
+ lt = LT_IF;
+ } else {
+ *valp = (value[sym] != NULL);
+ lt = *valp ? LT_TRUE : LT_FALSE;
+ }
+ cp = skipsym(cp);
+ cp = skipcomment(cp);
+ if (defparen && *cp++ != ')')
+ return (LT_ERROR);
+ constexpr = false;
+ } else if (!endsym(*cp)) {
+ debug("eval%d symbol", ops - eval_ops);
+ sym = findsym(cp);
+ cp = skipsym(cp);
+ if (sym < 0) {
+ lt = LT_IF;
+ cp = skipargs(cp);
+ } else if (value[sym] == NULL) {
+ *valp = 0;
+ lt = LT_FALSE;
+ } else {
+ *valp = strtol(value[sym], &ep, 0);
+ if (*ep != '\0' || ep == value[sym])
+ return (LT_ERROR);
+ lt = *valp ? LT_TRUE : LT_FALSE;
+ cp = skipargs(cp);
+ }
+ constexpr = false;
+ } else {
+ debug("eval%d bad expr", ops - eval_ops);
+ return (LT_ERROR);
+ }
+
+ *cpp = cp;
+ debug("eval%d = %d", ops - eval_ops, *valp);
+ return (lt);
+}
+
+static Linetype
+eval_table(const struct ops *ops, int *valp, const char **cpp)
+{
+ const struct op *op;
+ const char *cp;
+ int val;
+ Linetype lt, rt;
+
+ debug("eval%d", ops - eval_ops);
+ cp = *cpp;
+ lt = ops->inner(ops+1, valp, &cp);
+ if (lt == LT_ERROR)
+ return (LT_ERROR);
+ for (;;) {
+ cp = skipcomment(cp);
+ for (op = ops->op; op->str != NULL; op++)
+ if (strncmp(cp, op->str, strlen(op->str)) == 0)
+ break;
+ if (op->str == NULL)
+ break;
+ cp += strlen(op->str);
+ debug("eval%d %s", ops - eval_ops, op->str);
+ rt = ops->inner(ops+1, &val, &cp);
+ if (rt == LT_ERROR)
+ return (LT_ERROR);
+ lt = op->fn(valp, lt, *valp, rt, val);
+ }
+
+ *cpp = cp;
+ debug("eval%d = %d", ops - eval_ops, *valp);
+ debug("eval%d lt = %s", ops - eval_ops, linetype_name[lt]);
+ return (lt);
+}
+
+static Linetype
+ifeval(const char **cpp)
+{
+ int ret;
+ int val = 0;
+
+ debug("eval %s", *cpp);
+ constexpr = killconsts ? false : true;
+ ret = eval_table(eval_ops, &val, cpp);
+ debug("eval = %d", val);
+ return (constexpr ? LT_IF : ret == LT_ERROR ? LT_IF : ret);
+}
+
+static const char *
+skipcomment(const char *cp)
+{
+ if (text || ignoring[depth]) {
+ for (; isspace((unsigned char)*cp); cp++)
+ if (*cp == '\n')
+ linestate = LS_START;
+ return (cp);
+ }
+ while (*cp != '\0')
+
+ if (strncmp(cp, "\\\r\n", 3) == 0)
+ cp += 3;
+ else if (strncmp(cp, "\\\n", 2) == 0)
+ cp += 2;
+ else switch (incomment) {
+ case NO_COMMENT:
+ if (strncmp(cp, "/\\\r\n", 4) == 0) {
+ incomment = STARTING_COMMENT;
+ cp += 4;
+ } else if (strncmp(cp, "/\\\n", 3) == 0) {
+ incomment = STARTING_COMMENT;
+ cp += 3;
+ } else if (strncmp(cp, "/*", 2) == 0) {
+ incomment = C_COMMENT;
+ cp += 2;
+ } else if (strncmp(cp, "//", 2) == 0) {
+ incomment = CXX_COMMENT;
+ cp += 2;
+ } else if (strncmp(cp, "\'", 1) == 0) {
+ incomment = CHAR_LITERAL;
+ linestate = LS_DIRTY;
+ cp += 1;
+ } else if (strncmp(cp, "\"", 1) == 0) {
+ incomment = STRING_LITERAL;
+ linestate = LS_DIRTY;
+ cp += 1;
+ } else if (strncmp(cp, "\n", 1) == 0) {
+ linestate = LS_START;
+ cp += 1;
+ } else if (strchr(" \r\t", *cp) != NULL) {
+ cp += 1;
+ } else
+ return (cp);
+ continue;
+ case CXX_COMMENT:
+ if (strncmp(cp, "\n", 1) == 0) {
+ incomment = NO_COMMENT;
+ linestate = LS_START;
+ }
+ cp += 1;
+ continue;
+ case CHAR_LITERAL:
+ case STRING_LITERAL:
+ if ((incomment == CHAR_LITERAL && cp[0] == '\'') ||
+ (incomment == STRING_LITERAL && cp[0] == '\"')) {
+ incomment = NO_COMMENT;
+ cp += 1;
+ } else if (cp[0] == '\\') {
+ if (cp[1] == '\0')
+ cp += 1;
+ else
+ cp += 2;
+ } else if (strncmp(cp, "\n", 1) == 0) {
+ if (incomment == CHAR_LITERAL)
+ error("unterminated char literal");
+ else
+ error("unterminated string literal");
+ } else
+ cp += 1;
+ continue;
+ case C_COMMENT:
+ if (strncmp(cp, "*\\\r\n", 4) == 0) {
+ incomment = FINISHING_COMMENT;
+ cp += 4;
+ } else if (strncmp(cp, "*\\\n", 3) == 0) {
+ incomment = FINISHING_COMMENT;
+ cp += 3;
+ } else if (strncmp(cp, "*/", 2) == 0) {
+ incomment = NO_COMMENT;
+ cp += 2;
+ } else
+ cp += 1;
+ continue;
+ case STARTING_COMMENT:
+ if (*cp == '*') {
+ incomment = C_COMMENT;
+ cp += 1;
+ } else if (*cp == '/') {
+ incomment = CXX_COMMENT;
+ cp += 1;
+ } else {
+ incomment = NO_COMMENT;
+ linestate = LS_DIRTY;
+ }
+ continue;
+ case FINISHING_COMMENT:
+ if (*cp == '/') {
+ incomment = NO_COMMENT;
+ cp += 1;
+ } else
+ incomment = C_COMMENT;
+ continue;
+ default:
+ abort();
+ }
+ return (cp);
+}
+
+static const char *
+skipargs(const char *cp)
+{
+ const char *ocp = cp;
+ int level = 0;
+ cp = skipcomment(cp);
+ if (*cp != '(')
+ return (cp);
+ do {
+ if (*cp == '(')
+ level++;
+ if (*cp == ')')
+ level--;
+ cp = skipcomment(cp+1);
+ } while (level != 0 && *cp != '\0');
+ if (level == 0)
+ return (cp);
+ else
+
+ return (ocp);
+}
+
+static const char *
+skipsym(const char *cp)
+{
+ while (!endsym(*cp))
+ ++cp;
+ return (cp);
+}
+
+static int
+findsym(const char *str)
+{
+ const char *cp;
+ int symind;
+
+ cp = skipsym(str);
+ if (cp == str)
+ return (-1);
+ if (symlist) {
+ if (symdepth && firstsym)
+ printf("%s%3d", zerosyms ? "" : "\n", depth);
+ firstsym = zerosyms = false;
+ printf("%s%.*s%s",
+ symdepth ? " " : "",
+ (int)(cp-str), str,
+ symdepth ? "" : "\n");
+
+ return (0);
+ }
+ for (symind = 0; symind < nsyms; ++symind) {
+ if (strlcmp(symname[symind], str, cp-str) == 0) {
+ debug("findsym %s %s", symname[symind],
+ value[symind] ? value[symind] : "");
+ return (symind);
+ }
+ }
+ return (-1);
+}
+
+static void
+addsym(bool ignorethis, bool definethis, char *sym)
+{
+ int symind;
+ char *val;
+
+ symind = findsym(sym);
+ if (symind < 0) {
+ if (nsyms >= MAXSYMS)
+ errx(2, "too many symbols");
+ symind = nsyms++;
+ }
+ symname[symind] = sym;
+ ignore[symind] = ignorethis;
+ val = sym + (skipsym(sym) - sym);
+ if (definethis) {
+ if (*val == '=') {
+ value[symind] = val+1;
+ *val = '\0';
+ } else if (*val == '\0')
+ value[symind] = "1";
+ else
+ usage();
+ } else {
+ if (*val != '\0')
+ usage();
+ value[symind] = NULL;
+ }
+ debug("addsym %s=%s", symname[symind],
+ value[symind] ? value[symind] : "undef");
+}
+
+static int
+strlcmp(const char *s, const char *t, size_t n)
+{
+ while (n-- && *t != '\0')
+ if (*s != *t)
+ return ((unsigned char)*s - (unsigned char)*t);
+ else
+ ++s, ++t;
+ return ((unsigned char)*s);
+}
+
+static void
+debug(const char *msg, ...)
+{
+ va_list ap;
+
+ if (debugging) {
+ va_start(ap, msg);
+ vwarnx(msg, ap);
+ va_end(ap);
+ }
+}
+
+static void
+error(const char *msg)
+{
+ if (depth == 0)
+ warnx("%s: %d: %s", filename, linenum, msg);
+ else
+ warnx("%s: %d: %s (#if line %d depth %d)",
+ filename, linenum, msg, stifline[depth], depth);
+ closeout();
+ errx(2, "output may be truncated");
+}