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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
static int
read_field(enum libfonts_alias_line_type *typep, char **valuep, const char *s, const char **endp)
{
char end1 = ' ';
char end2 = '\t';
size_t esc = 0;
size_t len;
const char *start;
const char *end;
char *v;
if (*s == '"') {
end1 = end2 = '"';
s++;
}
start = s;
for (;;) {
if (!*s || *s != '\n' || *s == end1 || *s == end2)
break;
if (*s == '\\') {
esc += 1;
s++;
if (!*s || *s == '\n')
goto badline;
}
s++;
}
end = s;
len = (size_t)(end - start) - esc;
if (end1 == '"' && *s != '"') {
badline:
*typep = LIBFONTS_ALIAS_LINE_MALFORMATTED;
*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;
}
static int
is_file_names_aliases(const char *line, const char **endp)
{
if (strncmp(line, "FILE_NAMES_ALIASES", sizeof("FILE_NAMES_ALIASES") - 1))
return 0;
line = &line[sizeof("FILE_NAMES_ALIASES") - 1];
while (isblank(*line))
line++;
if (!*line || *line == '\n') {
*endp = line;
return 1;
}
return 0;
}
int
libfonts_parse_alias_line(enum libfonts_alias_line_type *typep, char **aliasp, char **namep, const char *line, char **endp)
{
enum libfonts_alias_line_type type = LIBFONTS_ALIAS_LINE_BLANK;
int ret = 0;
if (aliasp)
*aliasp = NULL;
if (namep)
*namep = NULL;
if (!line) {
errno = EINVAL;
goto fail;
}
while (isblank(*line))
line++;
if (!*line)
goto out;
if (*line == '!') {
type = LIBFONTS_ALIAS_LINE_COMMENT;
goto out;
}
if (is_file_names_aliases(line, &line)) {
type = LIBFONTS_ALIAS_LINE_FONT_NAMES_ALIASES;
goto out;
}
if (read_field(&type, aliasp, line, &line))
goto fail;
if (!isblank(*line))
goto badline;
do {
line++;
} while (isblank(*line));
if (read_field(&type, namep, line, &line))
goto fail;
type = LIBFONTS_ALIAS_LINE_ALIAS_DEFINITION;
while (isblank(*line))
line++;
if (*line && *line != '\n')
goto badline;
goto out;
badline:
type = LIBFONTS_ALIAS_LINE_MALFORMATTED;
fail:
if (aliasp) {
free(*aliasp);
*aliasp = NULL;
}
if (namep) {
free(*namep);
*namep = NULL;
}
ret = -1;
out:
if (line)
while (*line && *line != '\n')
line++;
if (endp)
*endp = *(char **)(void *)&line;
if (typep)
*typep = type;
return ret;
}
#else
int
main(void)
{
return 0; /* XXX add test */
}
#endif
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