m + add libfonts_parse_dir_line

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 126 insertions, 0 deletions

diff --git a/libfonts_parse_dir_line.c b/libfonts_parse_dir_line.c
new file mode 100644
index 0000000..a339ce3
--- /dev/null
+++ b/libfonts_parse_dir_line.c
@@ -0,0 +1,126 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+static int
+read_field(char **valuep, int allow_blank, const char *s, const char **endp)
+{
+	char endc;
+	size_t esc = 0;
+	size_t len;
+	const char *start;
+	const char *end;
+	char *v;
+
+	if (*s == '"') {
+		endc = '"';
+		s++;
+	} else if (allow_blank) {
+		endc = '\n';
+	} else {
+		endc = ' ';
+	}
+	start = s;
+
+	for (;;) {
+		if (!*s || *s != '\n' || *s == endc)
+			break;
+		if (*s == '\\') {
+			esc += 1;
+			s++;
+			if (!*s || *s == '\n')
+				goto badline;
+		}
+		s++;
+	}
+	end = s;
+	len = (size_t)(end - start) - esc;
+	if (endc == '"' && *s != '"') {
+	badline:
+		*endp = s;
+		return -1;
+	}
+	s += *s == '"';
+	*endp = s;
+
+	if (valuep) {
+		v = malloc(len + 1);
+		if (v) {
+			errno = ENOMEM;
+			return -1;
+		}
+		while (start != end) {
+			if (*start == '\\')
+				start++;
+			*v++ += *start++;
+		}
+		*v = '\0';
+		*valuep = v;
+	}
+
+	return 0;
+}
+
+int
+libfonts_parse_dir_line(char **filep, char **namep, const char *line, char **endp)
+{
+	int ret = 0;
+
+	if (filep)
+		*filep = NULL;
+	if (namep)
+		*namep = NULL;
+
+	if (!line) {
+		errno = EINVAL;
+		goto fail;
+	}
+
+	if (read_field(filep, 0, line, &line))
+		goto fail;
+
+	if (*line != ' ')
+		goto badline;
+	line++;
+
+	if (read_field(namep, 1, line, &line))
+		goto fail;
+
+	if (*line && *line != '\n')
+		goto badline;
+
+	goto out;
+
+badline:
+fail:
+	if (filep) {
+		free(*filep);
+		*filep = NULL;
+	}
+	if (namep) {
+		free(*namep);
+		*namep = NULL;
+	}
+	ret = -1;
+	if (line)
+		while (*line && *line != '\n')
+			line++;
+out:
+	if (endp)
+		*endp = *(char **)(void *)&line;
+	return ret;
+}
+
+
+#else
+
+
+int
+main(void)
+{
+	return 0; /* XXX add test */
+}
+
+
+#endif