diff options
Diffstat (limited to 'cmd-string.c')
| -rw-r--r-- | cmd-string.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/cmd-string.c b/cmd-string.c new file mode 100644 index 00000000..7674a0fb --- /dev/null +++ b/cmd-string.c @@ -0,0 +1,171 @@ +/* $Id: cmd-string.c,v 1.1 2008-06-19 20:45:20 nicm Exp $ */ + +/* + * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER + * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/types.h> + +#include <errno.h> +#include <stdio.h> +#include <string.h> + +#include "tmux.h" + +/* + * Parse a command from a string. + */ + +int cmd_string_getc(const char *, size_t *); +char *cmd_string_string(const char *, size_t *, char, int); + +int +cmd_string_getc(const char *s, size_t *p) +{ + if (s[*p] == '\0') + return (EOF); + return (s[(*p)++]); +} + +struct cmd * +cmd_string_parse(const char *s, char **cause) +{ + size_t p; + int ch, argc; + char **argv, *buf, *t; + size_t len; + struct cmd *cmd; + + argv = NULL; + argc = 0; + + buf = NULL; + len = 0; + + cmd = NULL; + + p = 0; + for (;;) { + ch = cmd_string_getc(s, &p); + switch (ch) { + case '\'': + if ((t = cmd_string_string(s, &p, '\'', 0)) == NULL) + goto error; + argv = xrealloc(argv, argc + 1, sizeof *argv); + argv[argc++] = t; + break; + case '"': + if ((t = cmd_string_string(s, &p, '"', 1)) == NULL) + goto error; + argv = xrealloc(argv, argc + 1, sizeof *argv); + argv[argc++] = t; + break; + case '#': + /* Comment: discard rest of line. */ + while ((ch = cmd_string_getc(s, &p)) != EOF) + ; + /* FALLTHROUGH */ + case EOF: + case ' ': + case '\t': + if (len != 0) { + buf = xrealloc(buf, 1, len + 1); + buf[len] = '\0'; + + argv = xrealloc(argv, argc + 1, sizeof *argv); + argv[argc++] = buf; + + buf = NULL; + len = 0; + } + + if (ch != EOF) + break; + + cmd = cmd_parse(argc, argv, cause); + goto out; + default: + if (len >= SIZE_MAX - 2) + goto error; + + buf = xrealloc(buf, 1, len + 1); + buf[len++] = ch; + break; + } + } + +error: + xasprintf(cause, "bad command: %s", s); + +out: + if (buf != NULL) + xfree(buf); + + while (--argc >= 0) + xfree(argv[argc]); + if (argv != NULL) + xfree(argv); + + return (cmd); +} + +char * +cmd_string_string(const char *s, size_t *p, char endch, int esc) +{ + int ch; + char *buf; + size_t len; + + buf = NULL; + len = 0; + + while ((ch = cmd_string_getc(s, p)) != endch) { + switch (ch) { + case EOF: + goto error; + case '\\': + if (!esc) + break; + switch (ch = cmd_string_getc(s, p)) { + case EOF: + goto error; + case 'r': + ch = '\r'; + break; + case 'n': + ch = '\n'; + break; + case 't': + ch = '\t'; + break; + } + break; + } + + if (len >= SIZE_MAX - 2) + goto error; + buf = xrealloc(buf, 1, len + 1); + buf[len++] = ch; + } + + buf = xrealloc(buf, 1, len + 1); + buf[len] = '\0'; + return (buf); + +error: + if (buf != NULL) + xfree(buf); + return (NULL); +} |