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-rw-r--r--man_argv.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/man_argv.c b/man_argv.c
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+++ b/man_argv.c
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+/* $Id$ */
+/*
+ * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ *
+ * 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 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 <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libman.h"
+
+
+int
+man_args(struct man *m, int line, int *pos, char *buf, char **v)
+{
+
+ assert(*pos);
+ assert(' ' != buf[*pos]);
+
+ if (0 == buf[*pos])
+ return(ARGS_EOLN);
+
+ *v = &buf[*pos];
+
+ /*
+ * Process a quoted literal. A quote begins with a double-quote
+ * and ends with a double-quote NOT preceded by a double-quote.
+ * Whitespace is NOT involved in literal termination.
+ */
+
+ if ('\"' == buf[*pos]) {
+ *v = &buf[++(*pos)];
+
+ for ( ; buf[*pos]; (*pos)++) {
+ if ('\"' != buf[*pos])
+ continue;
+ if ('\"' != buf[*pos + 1])
+ break;
+ (*pos)++;
+ }
+
+ if (0 == buf[*pos]) {
+ if ( ! man_pwarn(m, line, *pos, WTQUOTE))
+ return(ARGS_ERROR);
+ return(ARGS_QWORD);
+ }
+
+ buf[(*pos)++] = 0;
+
+ if (0 == buf[*pos])
+ return(ARGS_QWORD);
+
+ while (' ' == buf[*pos])
+ (*pos)++;
+
+ if (0 == buf[*pos])
+ if ( ! man_pwarn(m, line, *pos, WTSPACE))
+ return(ARGS_ERROR);
+
+ return(ARGS_QWORD);
+ }
+
+ /*
+ * A non-quoted term progresses until either the end of line or
+ * a non-escaped whitespace.
+ */
+
+ for ( ; buf[*pos]; (*pos)++)
+ if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
+ break;
+
+ if (0 == buf[*pos])
+ return(ARGS_WORD);
+
+ buf[(*pos)++] = 0;
+
+ while (' ' == buf[*pos])
+ (*pos)++;
+
+ if (0 == buf[*pos])
+ if ( ! man_pwarn(m, line, *pos, WTSPACE))
+ return(ARGS_ERROR);
+
+ return(ARGS_WORD);
+}
+