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eval.c
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eval.c
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/*
* eval.c - gawk bytecode interpreter
*/
/*
* Copyright (C) 1986, 1988, 1989, 1991-2017 the Free Software Foundation, Inc.
*
* This file is part of GAWK, the GNU implementation of the
* AWK Programming Language.
*
* GAWK is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GAWK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "awk.h"
extern double pow(double x, double y);
extern double modf(double x, double *yp);
extern double fmod(double x, double y);
NODE **fcall_list = NULL;
long fcall_count = 0;
int currule = 0;
IOBUF *curfile = NULL; /* current data file */
bool exiting = false;
int (*interpret)(INSTRUCTION *);
#define MAX_EXEC_HOOKS 10
static int num_exec_hook = 0;
static Func_pre_exec pre_execute[MAX_EXEC_HOOKS];
static Func_post_exec post_execute = NULL;
extern void frame_popped();
int OFSlen;
int ORSlen;
int OFMTidx;
int CONVFMTidx;
static NODE *node_Boolean[2];
/* This rather ugly macro is for VMS C */
#ifdef C
#undef C
#endif
#define C(c) ((char)c)
/*
* This table is used by the regexp routines to do case independent
* matching. Basically, every ascii character maps to itself, except
* uppercase letters map to lower case ones. This table has 256
* entries, for ISO 8859-1. Note also that if the system this
* is compiled on doesn't use 7-bit ascii, casetable[] should not be
* defined to the linker, so gawk should not load.
*
* Do NOT make this array static, it is used in several spots, not
* just in this file.
*
* 6/2004:
* This table is also used for IGNORECASE for == and !=, and index().
* Although with GLIBC, we could use tolower() everywhere and RE_ICASE
* for the regex matcher, precomputing this table once gives us a
* performance improvement. I also think it's better for portability
* to non-GLIBC systems. All the world is not (yet :-) GNU/Linux.
*/
#if 'a' == 97 /* it's ascii */
char casetable[] = {
'\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
'\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
'\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
'\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
/* ' ' '!' '"' '#' '$' '%' '&' ''' */
'\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
/* '(' ')' '*' '+' ',' '-' '.' '/' */
'\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
/* '0' '1' '2' '3' '4' '5' '6' '7' */
'\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
/* '8' '9' ':' ';' '<' '=' '>' '?' */
'\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
/* '@' 'A' 'B' 'C' 'D' 'E' 'F' 'G' */
'\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
/* 'H' 'I' 'J' 'K' 'L' 'M' 'N' 'O' */
'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
/* 'P' 'Q' 'R' 'S' 'T' 'U' 'V' 'W' */
'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
/* 'X' 'Y' 'Z' '[' '\' ']' '^' '_' */
'\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
/* '`' 'a' 'b' 'c' 'd' 'e' 'f' 'g' */
'\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
/* 'h' 'i' 'j' 'k' 'l' 'm' 'n' 'o' */
'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
/* 'p' 'q' 'r' 's' 't' 'u' 'v' 'w' */
'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
/* 'x' 'y' 'z' '{' '|' '}' '~' */
'\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
/* Latin 1: */
C('\200'), C('\201'), C('\202'), C('\203'), C('\204'), C('\205'), C('\206'), C('\207'),
C('\210'), C('\211'), C('\212'), C('\213'), C('\214'), C('\215'), C('\216'), C('\217'),
C('\220'), C('\221'), C('\222'), C('\223'), C('\224'), C('\225'), C('\226'), C('\227'),
C('\230'), C('\231'), C('\232'), C('\233'), C('\234'), C('\235'), C('\236'), C('\237'),
C('\240'), C('\241'), C('\242'), C('\243'), C('\244'), C('\245'), C('\246'), C('\247'),
C('\250'), C('\251'), C('\252'), C('\253'), C('\254'), C('\255'), C('\256'), C('\257'),
C('\260'), C('\261'), C('\262'), C('\263'), C('\264'), C('\265'), C('\266'), C('\267'),
C('\270'), C('\271'), C('\272'), C('\273'), C('\274'), C('\275'), C('\276'), C('\277'),
C('\340'), C('\341'), C('\342'), C('\343'), C('\344'), C('\345'), C('\346'), C('\347'),
C('\350'), C('\351'), C('\352'), C('\353'), C('\354'), C('\355'), C('\356'), C('\357'),
C('\360'), C('\361'), C('\362'), C('\363'), C('\364'), C('\365'), C('\366'), C('\327'),
C('\370'), C('\371'), C('\372'), C('\373'), C('\374'), C('\375'), C('\376'), C('\337'),
C('\340'), C('\341'), C('\342'), C('\343'), C('\344'), C('\345'), C('\346'), C('\347'),
C('\350'), C('\351'), C('\352'), C('\353'), C('\354'), C('\355'), C('\356'), C('\357'),
C('\360'), C('\361'), C('\362'), C('\363'), C('\364'), C('\365'), C('\366'), C('\367'),
C('\370'), C('\371'), C('\372'), C('\373'), C('\374'), C('\375'), C('\376'), C('\377'),
};
#elif defined(USE_EBCDIC)
char casetable[] = {
/*00 NU SH SX EX PF HT LC DL */
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
/*08 SM VT FF CR SO SI */
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
/*10 DE D1 D2 TM RS NL BS IL */
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
/*18 CN EM CC C1 FS GS RS US */
0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
/*20 DS SS FS BP LF EB EC */
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
/*28 SM C2 EQ AK BL */
0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
/*30 SY PN RS UC ET */
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
/*38 C3 D4 NK SU */
0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
/*40 SP */
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
/*48 CENT . < ( + | */
0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
/*50 & */
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
/*58 ! $ * ) ; ^ */
0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
/*60 - / */
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
/*68 | , % _ > ? */
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
/*70 */
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
/*78 ` : # @ ' = " */
0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
/*80 a b c d e f g */
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
/*88 h i { */
0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
/*90 j k l m n o p */
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
/*98 q r } */
0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
/*A0 ~ s t u v w x */
0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
/*A8 y z [ */
0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
/*B0 */
0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
/*B8 ] */
0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
/*C0 { A B C D E F G */
0xC0, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
/*C8 H I */
0x88, 0x89, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
/*D0 } J K L M N O P */
0xD0, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
/*D8 Q R */
0x98, 0x99, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
/*E0 \ S T U V W X */
0xE0, 0xE1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
/*E8 Y Z */
0xA8, 0xA9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
/*F0 0 1 2 3 4 5 6 7 */
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
/*F8 8 9 */
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
};
#else
#include "You lose. You will need a translation table for your character set."
#endif
#undef C
/* load_casetable --- for a non-ASCII locale, redo the table */
void
load_casetable(void)
{
#if defined(LC_CTYPE)
int i;
char *cp;
static bool loaded = false;
if (loaded || do_traditional)
return;
loaded = true;
cp = setlocale(LC_CTYPE, NULL);
/* this is not per standard, but it's pretty safe */
if (cp == NULL || strcmp(cp, "C") == 0 || strcmp(cp, "POSIX") == 0)
return;
#ifndef USE_EBCDIC
/* use of isalpha is ok here (see is_alpha in awkgram.y) */
for (i = 0200; i <= 0377; i++) {
if (isalpha(i) && islower(i) && i != toupper(i))
casetable[i] = toupper(i);
else
casetable[i] = i;
}
#endif
#endif
}
/*
* This table maps node types to strings for debugging.
* KEEP IN SYNC WITH awk.h!!!!
*/
static const char *const nodetypes[] = {
"Node_illegal",
"Node_val",
"Node_regex",
"Node_dynregex",
"Node_var",
"Node_var_array",
"Node_var_new",
"Node_param_list",
"Node_func",
"Node_ext_func",
"Node_builtin_func",
"Node_array_ref",
"Node_array_tree",
"Node_array_leaf",
"Node_dump_array",
"Node_arrayfor",
"Node_frame",
"Node_instruction",
"Node_final --- this should never appear",
NULL
};
/*
* This table maps Op codes to strings.
* KEEP IN SYNC WITH awk.h!!!!
*/
static struct optypetab {
char *desc;
char *operator;
} optypes[] = {
{ "Op_illegal", NULL },
{ "Op_times", " * " },
{ "Op_times_i", " * " },
{ "Op_quotient", " / " },
{ "Op_quotient_i", " / " },
{ "Op_mod", " % " },
{ "Op_mod_i", " % " },
{ "Op_plus", " + " },
{ "Op_plus_i", " + " },
{ "Op_minus", " - " },
{ "Op_minus_i", " - " },
{ "Op_exp", " ^ " },
{ "Op_exp_i", " ^ " },
{ "Op_concat", " " },
{ "Op_line_range", NULL },
{ "Op_cond_pair", ", " },
{ "Op_subscript", "[]" },
{ "Op_sub_array", "[]" },
{ "Op_preincrement", "++" },
{ "Op_predecrement", "--" },
{ "Op_postincrement", "++" },
{ "Op_postdecrement", "--" },
{ "Op_unary_minus", "-" },
{ "Op_unary_plus", "+" },
{ "Op_field_spec", "$" },
{ "Op_not", "! " },
{ "Op_assign", " = " },
{ "Op_store_var", " = " },
{ "Op_store_sub", " = " },
{ "Op_store_field", " = " },
{ "Op_assign_times", " *= " },
{ "Op_assign_quotient", " /= " },
{ "Op_assign_mod", " %= " },
{ "Op_assign_plus", " += " },
{ "Op_assign_minus", " -= " },
{ "Op_assign_exp", " ^= " },
{ "Op_assign_concat", " " },
{ "Op_and", " && " },
{ "Op_and_final", NULL },
{ "Op_or", " || " },
{ "Op_or_final", NULL },
{ "Op_equal", " == " },
{ "Op_notequal", " != " },
{ "Op_less", " < " },
{ "Op_greater", " > " },
{ "Op_leq", " <= " },
{ "Op_geq", " >= " },
{ "Op_match", " ~ " },
{ "Op_match_rec", NULL },
{ "Op_nomatch", " !~ " },
{ "Op_rule", NULL },
{ "Op_K_case", "case" },
{ "Op_K_default", "default" },
{ "Op_K_break", "break" },
{ "Op_K_continue", "continue" },
{ "Op_K_print", "print" },
{ "Op_K_print_rec", "print" },
{ "Op_K_printf", "printf" },
{ "Op_K_next", "next" },
{ "Op_K_exit", "exit" },
{ "Op_K_return", "return" },
{ "Op_K_delete", "delete" },
{ "Op_K_delete_loop", NULL },
{ "Op_K_getline_redir", "getline" },
{ "Op_K_getline", "getline" },
{ "Op_K_nextfile", "nextfile" },
{ "Op_builtin", NULL },
{ "Op_sub_builtin", NULL },
{ "Op_ext_builtin", NULL },
{ "Op_in_array", " in " },
{ "Op_func_call", NULL },
{ "Op_indirect_func_call", NULL },
{ "Op_push", NULL },
{ "Op_push_arg", NULL },
{ "Op_push_arg_untyped", NULL },
{ "Op_push_i", NULL },
{ "Op_push_re", NULL },
{ "Op_push_array", NULL },
{ "Op_push_param", NULL },
{ "Op_push_lhs", NULL },
{ "Op_subscript_lhs", "[]" },
{ "Op_field_spec_lhs", "$" },
{ "Op_no_op", NULL },
{ "Op_pop", NULL },
{ "Op_jmp", NULL },
{ "Op_jmp_true", NULL },
{ "Op_jmp_false", NULL },
{ "Op_get_record", NULL },
{ "Op_newfile", NULL },
{ "Op_arrayfor_init", NULL },
{ "Op_arrayfor_incr", NULL },
{ "Op_arrayfor_final", NULL },
{ "Op_var_update", NULL },
{ "Op_var_assign", NULL },
{ "Op_field_assign", NULL },
{ "Op_subscript_assign", NULL },
{ "Op_after_beginfile", NULL },
{ "Op_after_endfile", NULL },
{ "Op_func", NULL },
{ "Op_comment", NULL },
{ "Op_exec_count", NULL },
{ "Op_breakpoint", NULL },
{ "Op_lint", NULL },
{ "Op_atexit", NULL },
{ "Op_stop", NULL },
{ "Op_token", NULL },
{ "Op_symbol", NULL },
{ "Op_list", NULL },
{ "Op_K_do", "do" },
{ "Op_K_for", "for" },
{ "Op_K_arrayfor", "for" },
{ "Op_K_while", "while" },
{ "Op_K_switch", "switch" },
{ "Op_K_if", "if" },
{ "Op_K_else", "else" },
{ "Op_K_function", "function" },
{ "Op_cond_exp", NULL },
{ "Op_parens", NULL },
{ "Op_final --- this should never appear", NULL },
{ NULL, NULL },
};
/* nodetype2str --- convert a node type into a printable value */
const char *
nodetype2str(NODETYPE type)
{
static char buf[40];
if (type >= Node_illegal && type <= Node_final)
return nodetypes[(int) type];
sprintf(buf, _("unknown nodetype %d"), (int) type);
return buf;
}
/* opcode2str --- convert a opcode type into a printable value */
const char *
opcode2str(OPCODE op)
{
if (op >= Op_illegal && op < Op_final)
return optypes[(int) op].desc;
fatal(_("unknown opcode %d"), (int) op);
return NULL;
}
const char *
op2str(OPCODE op)
{
if (op >= Op_illegal && op < Op_final) {
if (optypes[(int) op].operator != NULL)
return optypes[(int) op].operator;
else
fatal(_("opcode %s not an operator or keyword"),
optypes[(int) op].desc);
} else
fatal(_("unknown opcode %d"), (int) op);
return NULL;
}
/* flags2str --- make a flags value readable */
const char *
flags2str(int flagval)
{
static const struct flagtab values[] = {
{ MALLOC, "MALLOC" },
{ STRING, "STRING" },
{ STRCUR, "STRCUR" },
{ NUMCUR, "NUMCUR" },
{ NUMBER, "NUMBER" },
{ USER_INPUT, "USER_INPUT" },
{ INTLSTR, "INTLSTR" },
{ NUMINT, "NUMINT" },
{ INTIND, "INTIND" },
{ WSTRCUR, "WSTRCUR" },
{ MPFN, "MPFN" },
{ MPZN, "MPZN" },
{ NO_EXT_SET, "NO_EXT_SET" },
{ NULL_FIELD, "NULL_FIELD" },
{ ARRAYMAXED, "ARRAYMAXED" },
{ HALFHAT, "HALFHAT" },
{ XARRAY, "XARRAY" },
{ NUMCONSTSTR, "NUMCONSTSTR" },
{ REGEX, "REGEX" },
{ 0, NULL },
};
return genflags2str(flagval, values);
}
/* genflags2str --- general routine to convert a flag value to a string */
const char *
genflags2str(int flagval, const struct flagtab *tab)
{
static char buffer[BUFSIZ];
char *sp;
int i, space_left, space_needed;
sp = buffer;
space_left = BUFSIZ;
for (i = 0; tab[i].name != NULL; i++) {
if ((flagval & tab[i].val) != 0) {
/*
* note the trick, we want 1 or 0 for whether we need
* the '|' character.
*/
space_needed = (strlen(tab[i].name) + (sp != buffer));
if (space_left <= space_needed)
fatal(_("buffer overflow in genflags2str"));
if (sp != buffer) {
*sp++ = '|';
space_left--;
}
strcpy(sp, tab[i].name);
/* note ordering! */
space_left -= strlen(sp);
sp += strlen(sp);
}
}
*sp = '\0';
return buffer;
}
/* posix_compare --- compare strings using strcoll */
static int
posix_compare(NODE *s1, NODE *s2)
{
int ret = 0;
char save1, save2;
size_t l = 0;
save1 = s1->stptr[s1->stlen];
s1->stptr[s1->stlen] = '\0';
save2 = s2->stptr[s2->stlen];
s2->stptr[s2->stlen] = '\0';
if (gawk_mb_cur_max == 1) {
if (strlen(s1->stptr) == s1->stlen && strlen(s2->stptr) == s2->stlen)
ret = strcoll(s1->stptr, s2->stptr);
else {
char b1[2], b2[2];
char *p1, *p2;
size_t i;
if (s1->stlen < s2->stlen)
l = s1->stlen;
else
l = s2->stlen;
b1[1] = b2[1] = '\0';
for (i = ret = 0, p1 = s1->stptr, p2 = s2->stptr;
ret == 0 && i < l;
p1++, p2++) {
b1[0] = *p1;
b2[0] = *p2;
ret = strcoll(b1, b2);
}
}
/*
* Either worked through the strings or ret != 0.
* In either case, ret will be the right thing to return.
*/
}
#if ! defined(__DJGPP__)
else {
/* Similar logic, using wide characters */
(void) force_wstring(s1);
(void) force_wstring(s2);
if (wcslen(s1->wstptr) == s1->wstlen && wcslen(s2->wstptr) == s2->wstlen)
ret = wcscoll(s1->wstptr, s2->wstptr);
else {
wchar_t b1[2], b2[2];
wchar_t *p1, *p2;
size_t i;
if (s1->wstlen < s2->wstlen)
l = s1->wstlen;
else
l = s2->wstlen;
b1[1] = b2[1] = L'\0';
for (i = ret = 0, p1 = s1->wstptr, p2 = s2->wstptr;
ret == 0 && i < l;
p1++, p2++) {
b1[0] = *p1;
b2[0] = *p2;
ret = wcscoll(b1, b2);
}
}
/*
* Either worked through the strings or ret != 0.
* In either case, ret will be the right thing to return.
*/
}
#endif
s1->stptr[s1->stlen] = save1;
s2->stptr[s2->stlen] = save2;
return ret;
}
/* cmp_nodes --- compare two nodes, returning negative, 0, positive */
int
cmp_nodes(NODE *t1, NODE *t2, bool use_strcmp)
{
int ret = 0;
size_t len1, len2;
int l, ldiff;
if (t1 == t2)
return 0;
(void) fixtype(t1);
(void) fixtype(t2);
if ((t1->flags & NUMBER) != 0 && (t2->flags & NUMBER) != 0)
return cmp_numbers(t1, t2);
(void) force_string(t1);
(void) force_string(t2);
len1 = t1->stlen;
len2 = t2->stlen;
ldiff = len1 - len2;
if (len1 == 0 || len2 == 0)
return ldiff;
if (do_posix && ! use_strcmp)
return posix_compare(t1, t2);
l = (ldiff <= 0 ? len1 : len2);
if (IGNORECASE) {
const unsigned char *cp1 = (const unsigned char *) t1->stptr;
const unsigned char *cp2 = (const unsigned char *) t2->stptr;
char save1 = t1->stptr[t1->stlen];
char save2 = t2->stptr[t2->stlen];
if (gawk_mb_cur_max > 1) {
t1->stptr[t1->stlen] = t2->stptr[t2->stlen] = '\0';
ret = strncasecmpmbs((const unsigned char *) cp1,
(const unsigned char *) cp2, l);
t1->stptr[t1->stlen] = save1;
t2->stptr[t2->stlen] = save2;
} else {
/* Could use tolower() here; see discussion above. */
for (ret = 0; l-- > 0 && ret == 0; cp1++, cp2++)
ret = casetable[*cp1] - casetable[*cp2];
}
} else
ret = memcmp(t1->stptr, t2->stptr, l);
ret = ret == 0 ? ldiff : ret;
return ret;
}
/* push_frame --- push a frame NODE onto stack */
static void
push_frame(NODE *f)
{
static long max_fcall;
/* NB: frame numbering scheme as in GDB. frame_ptr => frame #0. */
fcall_count++;
if (fcall_list == NULL) {
max_fcall = 10;
emalloc(fcall_list, NODE **, (max_fcall + 1) * sizeof(NODE *), "push_frame");
} else if (fcall_count == max_fcall) {
max_fcall *= 2;
erealloc(fcall_list, NODE **, (max_fcall + 1) * sizeof(NODE *), "push_frame");
}
if (fcall_count > 1)
memmove(fcall_list + 2, fcall_list + 1, (fcall_count - 1) * sizeof(NODE *));
fcall_list[1] = f;
}
/* pop_frame --- pop off a frame NODE*/
static void
pop_frame()
{
if (fcall_count > 1)
memmove(fcall_list + 1, fcall_list + 2, (fcall_count - 1) * sizeof(NODE *));
fcall_count--;
assert(fcall_count >= 0);
if (do_debug)
frame_popped();
}
/* dump_fcall_stack --- print a backtrace of the awk function calls */
void
dump_fcall_stack(FILE *fp)
{
NODE *f, *func;
long i = 0, k = 0;
if (fcall_count == 0)
return;
fprintf(fp, _("\n\t# Function Call Stack:\n\n"));
/* current frame */
func = frame_ptr->func_node;
fprintf(fp, "\t# %3ld. %s\n", k++, func->vname);
/* outer frames except main */
for (i = 1; i < fcall_count; i++) {
f = fcall_list[i];
func = f->func_node;
fprintf(fp, "\t# %3ld. %s\n", k++, func->vname);
}
fprintf(fp, "\t# %3ld. -- main --\n", k);
}
/* set_IGNORECASE --- update IGNORECASE as appropriate */
void
set_IGNORECASE()
{
static bool warned = false;
if ((do_lint || do_traditional) && ! warned) {
warned = true;
lintwarn(_("`IGNORECASE' is a gawk extension"));
}
load_casetable();
if (do_traditional)
IGNORECASE = false;
else
IGNORECASE = boolval(IGNORECASE_node->var_value);
set_RS(); /* set_RS() calls set_FS() if need be, for us */
}
/* set_BINMODE --- set translation mode (OS/2, DOS, others) */
void
set_BINMODE()
{
static bool warned = false;
char *p;
NODE *v = fixtype(BINMODE_node->var_value);
if ((do_lint || do_traditional) && ! warned) {
warned = true;
lintwarn(_("`BINMODE' is a gawk extension"));
}
if (do_traditional)
BINMODE = TEXT_TRANSLATE;
else if ((v->flags & NUMBER) != 0) {
BINMODE = get_number_si(v);
/* Make sure the value is rational. */
if (BINMODE < TEXT_TRANSLATE)
BINMODE = TEXT_TRANSLATE;
else if (BINMODE > BINMODE_BOTH)
BINMODE = BINMODE_BOTH;
} else if ((v->flags & STRING) != 0) {
p = v->stptr;
/*
* Allow only one of the following:
* "0", "1", "2", "3",
* "r", "w", "rw", "wr"
* ANYTHING ELSE goes to 3. So there.
*/
switch (v->stlen) {
case 1:
switch (p[0]) {
case '0':
case '1':
case '2':
case '3':
BINMODE = p[0] - '0';
break;
case 'r':
BINMODE = BINMODE_INPUT;
break;
case 'w':
BINMODE = BINMODE_OUTPUT;
break;
default:
BINMODE = BINMODE_BOTH;
goto bad_value;
break;
}
break;
case 2:
switch (p[0]) {
case 'r':
BINMODE = BINMODE_BOTH;
if (p[1] != 'w')
goto bad_value;
break;
case 'w':
BINMODE = BINMODE_BOTH;
if (p[1] != 'r')
goto bad_value;
break;
}
break;
default:
bad_value:
lintwarn(_("BINMODE value `%s' is invalid, treated as 3"), p);
break;
}
} else
BINMODE = 3; /* shouldn't happen */
}
/* set_OFS --- update OFS related variables when OFS assigned to */
void
set_OFS()
{
static bool first = true;
size_t new_ofs_len;
if (first) /* true when called from init_vars() in main() */
first = false;
else {
/* rebuild $0 using OFS that was current when $0 changed */
if (! field0_valid) {
get_field(UNLIMITED - 1, NULL);
rebuild_record();
}
}
/*
* Save OFS value for use in building record and in printing.
* Can't just have OFS point into the OFS_node since it's
* already updated when we come into this routine, and we need
* the old value to rebuild the record (see above).
*/
OFS_node->var_value = force_string(OFS_node->var_value);
new_ofs_len = OFS_node->var_value->stlen;
if (OFS == NULL)
emalloc(OFS, char *, new_ofs_len + 1, "set_OFS");
else if (OFSlen < new_ofs_len)
erealloc(OFS, char *, new_ofs_len + 1, "set_OFS");
memcpy(OFS, OFS_node->var_value->stptr, OFS_node->var_value->stlen);
OFSlen = new_ofs_len;
OFS[OFSlen] = '\0';
}
/* set_ORS --- update ORS related variables when ORS assigned to */
void
set_ORS()
{
ORS_node->var_value = force_string(ORS_node->var_value);
ORS = ORS_node->var_value->stptr;
ORSlen = ORS_node->var_value->stlen;
}
/* fmt_ok --- is the conversion format a valid one? */
NODE **fmt_list = NULL;
static int fmt_ok(NODE *n);
static int fmt_index(NODE *n);
static int
fmt_ok(NODE *n)
{
NODE *tmp = force_string(n);
const char *p = tmp->stptr;
#if ! defined(PRINTF_HAS_F_FORMAT) || PRINTF_HAS_F_FORMAT != 1
static const char float_formats[] = "efgEG";
#else
static const char float_formats[] = "efgEFG";
#endif
#if defined(HAVE_LOCALE_H)
static const char flags[] = " +-#'";
#else
static const char flags[] = " +-#";
#endif
// We rely on the caller to zero-terminate n->stptr.
if (*p++ != '%')
return 0;
while (*p && strchr(flags, *p) != NULL) /* flags */
p++;
while (*p && isdigit((unsigned char) *p)) /* width - %*.*g is NOT allowed */
p++;
if (*p == '\0' || (*p != '.' && ! isdigit((unsigned char) *p)))
return 0;
if (*p == '.')
p++;
while (*p && isdigit((unsigned char) *p)) /* precision */
p++;
if (*p == '\0' || strchr(float_formats, *p) == NULL)
return 0;
if (*++p != '\0')
return 0;
return 1;
}
/* fmt_index --- track values of OFMT and CONVFMT to keep semantics correct */
static int
fmt_index(NODE *n)
{
int ix = 0;
static int fmt_num = 4;
static int fmt_hiwater = 0;
char save;
if (fmt_list == NULL)
emalloc(fmt_list, NODE **, fmt_num*sizeof(*fmt_list), "fmt_index");
n = force_string(n);
save = n->stptr[n->stlen];
n->stptr[n->stlen] = '\0';
while (ix < fmt_hiwater) {
if (cmp_nodes(fmt_list[ix], n, true) == 0)
return ix;
ix++;
}
/* not found */
if (do_lint && ! fmt_ok(n))
lintwarn(_("bad `%sFMT' specification `%s'"),
n == CONVFMT_node->var_value ? "CONV"
: n == OFMT_node->var_value ? "O"
: "", n->stptr);
n->stptr[n->stlen] = save;
if (fmt_hiwater >= fmt_num) {
fmt_num *= 2;
erealloc(fmt_list, NODE **, fmt_num * sizeof(*fmt_list), "fmt_index");
}
fmt_list[fmt_hiwater] = dupnode(n);
return fmt_hiwater++;
}
/* set_OFMT --- track OFMT correctly */
void
set_OFMT()
{
OFMTidx = fmt_index(OFMT_node->var_value);
OFMT = fmt_list[OFMTidx]->stptr;
}
/* set_CONVFMT --- track CONVFMT correctly */
void
set_CONVFMT()
{
CONVFMTidx = fmt_index(CONVFMT_node->var_value);
CONVFMT = fmt_list[CONVFMTidx]->stptr;
}
/* set_LINT --- update LINT as appropriate */
void
set_LINT()
{
#ifndef NO_LINT
int old_lint = do_lint;
NODE *n = fixtype(LINT_node->var_value);
/* start with clean defaults */
lintfunc = r_warning;
do_flags &= ~(DO_LINT_ALL|DO_LINT_INVALID);
if ((n->flags & STRING) != 0) {
const char *lintval;
size_t lintlen;
lintval = n->stptr;
lintlen = n->stlen;
if (lintlen > 0) {
if (lintlen == 7 && strncmp(lintval, "invalid", 7) == 0)
do_flags |= DO_LINT_INVALID;
else {
do_flags |= DO_LINT_ALL;
if (lintlen == 5 && strncmp(lintval, "fatal", 5) == 0)
lintfunc = r_fatal;
}
}
} else {
if (! iszero(n))
do_flags |= DO_LINT_ALL;
}
/* explicitly use warning() here, in case lintfunc == r_fatal */
if (old_lint != do_lint && old_lint && ! do_lint)
warning(_("turning off `--lint' due to assignment to `LINT'"));
/* inform plug-in api of change */
update_ext_api();
#endif /* ! NO_LINT */
}
/* set_TEXTDOMAIN --- update TEXTDOMAIN variable when TEXTDOMAIN assigned to */
void
set_TEXTDOMAIN()
{
NODE *tmp;
tmp = TEXTDOMAIN_node->var_value = force_string(TEXTDOMAIN_node->var_value);
TEXTDOMAIN = tmp->stptr;
/*
* Note: don't call textdomain(); this value is for
* the awk program, not for gawk itself.
*/
}
/* update_ERRNO_int --- update the value of ERRNO based on argument */
void