diff options
Diffstat (limited to 'token.c')
| -rw-r--r-- | token.c | 30 |
1 files changed, 29 insertions, 1 deletions
@@ -1,4 +1,6 @@ +#include <assert.h> #include <stdarg.h> +#include <stdbool.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> @@ -7,7 +9,7 @@ struct token tok; -static char *tokstr[] = { +static const char *tokstr[] = { /* keyword */ [TAUTO] = "auto", [TBREAK] = "break", @@ -130,6 +132,32 @@ tokprint(const struct token *t) fputs(str, stdout); } +void +tokdesc(char *buf, size_t len, enum tokenkind kind, const char *lit) +{ + const char *class; + bool quote; + + switch (kind) { + case TIDENT: class = "identifier"; quote = true; break; + case TNUMBER: class = "number"; quote = true; break; + case TCHARCONST: class = "character"; quote = false; break; + case TSTRINGLIT: class = "string"; quote = false; break; + case TNEWLINE: class = "newline"; quote = true; break; + default: + class = NULL; + lit = kind < LEN(tokstr) ? tokstr[kind] : NULL; + } + if (class && lit) + snprintf(buf, len, quote ? "%s '%s'" : "%s %s", class, lit); + else if (class) + snprintf(buf, len, "%s", class); + else if (lit) + snprintf(buf, len, "'%s'", lit); + else + snprintf(buf, len, "<unknown>"); +} + _Noreturn void error(const struct location *loc, const char *fmt, ...) { va_list ap; |