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Diffstat (limited to 'src/parse.c')
| -rw-r--r-- | src/parse.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/src/parse.c b/src/parse.c new file mode 100644 index 0000000..f1c4391 --- /dev/null +++ b/src/parse.c @@ -0,0 +1,285 @@ +/* $NetBSD: parse.c,v 1.26 2011/08/16 16:25:15 christos Exp $ */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Christos Zoulas of Cornell University. + * + * 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. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + */ + +#include "config.h" +#if !defined(lint) && !defined(SCCSID) +#if 0 +static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93"; +#else +__RCSID("$NetBSD: parse.c,v 1.26 2011/08/16 16:25:15 christos Exp $"); +#endif +#endif /* not lint && not SCCSID */ + +/* + * parse.c: parse an editline extended command + * + * commands are: + * + * bind + * echotc + * edit + * gettc + * history + * settc + * setty + */ +#include "el.h" +#include <stdlib.h> + +private const struct { + const Char *name; + int (*func)(EditLine *, int, const Char **); +} cmds[] = { + { STR("bind"), map_bind }, + { STR("echotc"), terminal_echotc }, + { STR("edit"), el_editmode }, + { STR("history"), hist_command }, + { STR("telltc"), terminal_telltc }, + { STR("settc"), terminal_settc }, + { STR("setty"), tty_stty }, + { NULL, NULL } +}; + + +/* parse_line(): + * Parse a line and dispatch it + */ +protected int +parse_line(EditLine *el, const Char *line) +{ + const Char **argv; + int argc; + TYPE(Tokenizer) *tok; + + tok = FUN(tok,init)(NULL); + FUN(tok,str)(tok, line, &argc, &argv); + argc = FUN(el,parse)(el, argc, argv); + FUN(tok,end)(tok); + return argc; +} + + +/* el_parse(): + * Command dispatcher + */ +public int +FUN(el,parse)(EditLine *el, int argc, const Char *argv[]) +{ + const Char *ptr; + int i; + + if (argc < 1) + return -1; + ptr = Strchr(argv[0], ':'); + if (ptr != NULL) { + Char *tprog; + size_t l; + + if (ptr == argv[0]) + return 0; + l = (size_t)(ptr - argv[0] - 1); + tprog = el_malloc((l + 1) * sizeof(*tprog)); + if (tprog == NULL) + return 0; + (void) Strncpy(tprog, argv[0], l); + tprog[l] = '\0'; + ptr++; + l = (size_t)el_match(el->el_prog, tprog); + el_free(tprog); + if (!l) + return 0; + } else + ptr = argv[0]; + + for (i = 0; cmds[i].name != NULL; i++) + if (Strcmp(cmds[i].name, ptr) == 0) { + i = (*cmds[i].func) (el, argc, argv); + return -i; + } + return -1; +} + + +/* parse__escape(): + * Parse a string of the form ^<char> \<odigit> \<char> \U+xxxx and return + * the appropriate character or -1 if the escape is not valid + */ +protected int +parse__escape(const Char **ptr) +{ + const Char *p; + Int c; + + p = *ptr; + + if (p[1] == 0) + return -1; + + if (*p == '\\') { + p++; + switch (*p) { + case 'a': + c = '\007'; /* Bell */ + break; + case 'b': + c = '\010'; /* Backspace */ + break; + case 't': + c = '\011'; /* Horizontal Tab */ + break; + case 'n': + c = '\012'; /* New Line */ + break; + case 'v': + c = '\013'; /* Vertical Tab */ + break; + case 'f': + c = '\014'; /* Form Feed */ + break; + case 'r': + c = '\015'; /* Carriage Return */ + break; + case 'e': + c = '\033'; /* Escape */ + break; + case 'U': /* Unicode \U+xxxx or \U+xxxxx format */ + { + int i; + const Char hex[] = STR("0123456789ABCDEF"); + const Char *h; + ++p; + if (*p++ != '+') + return -1; + c = 0; + for (i = 0; i < 5; ++i) { + h = Strchr(hex, *p++); + if (!h && i < 4) + return -1; + else if (h) + c = (c << 4) | ((int)(h - hex)); + else + --p; + } + if (c > 0x10FFFF) /* outside valid character range */ + return -1; + break; + } + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + { + int cnt, ch; + + for (cnt = 0, c = 0; cnt < 3; cnt++) { + ch = *p++; + if (ch < '0' || ch > '7') { + p--; + break; + } + c = (c << 3) | (ch - '0'); + } + if ((c & (wint_t)0xffffff00) != (wint_t)0) + return -1; + --p; + break; + } + default: + c = *p; + break; + } + } else if (*p == '^') { + p++; + c = (*p == '?') ? '\177' : (*p & 0237); + } else + c = *p; + *ptr = ++p; + return c; +} + +/* parse__string(): + * Parse the escapes from in and put the raw string out + */ +protected Char * +parse__string(Char *out, const Char *in) +{ + Char *rv = out; + int n; + + for (;;) + switch (*in) { + case '\0': + *out = '\0'; + return rv; + + case '\\': + case '^': + if ((n = parse__escape(&in)) == -1) + return NULL; + *out++ = n; + break; + + case 'M': + if (in[1] == '-' && in[2] != '\0') { + *out++ = '\033'; + in += 2; + break; + } + /*FALLTHROUGH*/ + + default: + *out++ = *in++; + break; + } +} + + +/* parse_cmd(): + * Return the command number for the command string given + * or -1 if one is not found + */ +protected int +parse_cmd(EditLine *el, const Char *cmd) +{ + el_bindings_t *b; + + for (b = el->el_map.help; b->name != NULL; b++) + if (Strcmp(b->name, cmd) == 0) + return b->func; + return -1; +} |