aboutsummaryrefslogtreecommitdiffstats
path: root/src/mds-kbdc
diff options
context:
space:
mode:
authorMattias Andrée <maandree@operamail.com>2014-12-06 15:34:16 +0100
committerMattias Andrée <maandree@operamail.com>2014-12-06 15:34:16 +0100
commita1b34ec0bcc69acf24352f36ed63c0e88fbd5a5b (patch)
tree55b1d524382572e5b6236586aab9ba29919ad488 /src/mds-kbdc
parentmds-kbdc: callables (diff)
downloadmds-a1b34ec0bcc69acf24352f36ed63c0e88fbd5a5b.tar.gz
mds-a1b34ec0bcc69acf24352f36ed63c0e88fbd5a5b.tar.bz2
mds-a1b34ec0bcc69acf24352f36ed63c0e88fbd5a5b.tar.xz
mds-kbdc: parse variable strings
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'src/mds-kbdc')
-rw-r--r--src/mds-kbdc/compile-layout.c37
1 files changed, 33 insertions, 4 deletions
diff --git a/src/mds-kbdc/compile-layout.c b/src/mds-kbdc/compile-layout.c
index 16d93a8..057c21a 100644
--- a/src/mds-kbdc/compile-layout.c
+++ b/src/mds-kbdc/compile-layout.c
@@ -138,12 +138,41 @@ static char32_t* parse_keys(mds_kbdc_tree_t* restrict tree, const char* restrict
return NULL; /* TODO */
}
+
+/**
+ * Parse a variable string
+ *
+ * @param tree The statement where the variable is selected
+ * @param raw The variable string
+ * @param lineoff The offset on the line where the variable string begins
+ * @return The index of the variable, zero on error
+ */
static size_t parse_variable(mds_kbdc_tree_t* restrict tree, const char* restrict raw, size_t lineoff)
{
- (void) tree;
- (void) raw;
- (void) lineoff;
- return 0; /* TODO */
+ int bad = 0;
+ size_t var;
+ const char* restrict raw_ = raw;
+
+ if (*raw++ != '/') bad = 1;
+ if (*raw++ == '0') bad = 1;
+ for (; *raw; raw++)
+ bad |= ((*raw < '0') || ('9' < *raw));
+
+ if (bad)
+ {
+ NEW_ERROR(tree, ERROR, "not a variable");
+ error->start = lineoff;
+ error->end = lineoff + strlen(raw_);
+ tree->processed = PROCESS_LEVEL;
+ return 1;
+ }
+
+ var = (size_t)atoll(raw_ + 1);
+ if (strlen(raw_ + 1) != (size_t)snprintf(NULL, 0, "%zu", var))
+ return errno = ERANGE, (size_t)0;
+ return var;
+ pfail:
+ return 0;
}