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/* Generated by re2c */ #line 1 "c/eof/02_bounds_checking.re" // re2c $INPUT -o $OUTPUT #include <assert.h> #include <stdlib.h> #include <string.h> #line 9 "c/eof/02_bounds_checking.c" #define YYMAXFILL 1 #line 6 "c/eof/02_bounds_checking.re" static int lex(const char *str, unsigned int len) { // Make a copy of the string with YYMAXFILL zeroes at the end. char *buf = (char*) malloc(len + YYMAXFILL); memcpy(buf, str, len); memset(buf + len, 0, YYMAXFILL); const char *YYCURSOR = buf, *YYLIMIT = buf + len + YYMAXFILL; int count = 0; loop: #line 25 "c/eof/02_bounds_checking.c" { char yych; if (YYLIMIT <= YYCURSOR) goto fail; yych = *YYCURSOR; switch (yych) { case 0x00: goto yy1; case ' ': goto yy3; case '\'': goto yy5; default: goto yy2; } yy1: ++YYCURSOR; #line 25 "c/eof/02_bounds_checking.re" { // Check that it is the sentinel, not some unexpected null. if (YYCURSOR - 1 == buf + len) goto exit; else goto fail; } #line 43 "c/eof/02_bounds_checking.c" yy2: ++YYCURSOR; #line 31 "c/eof/02_bounds_checking.re" { goto fail; } #line 48 "c/eof/02_bounds_checking.c" yy3: ++YYCURSOR; if (YYLIMIT <= YYCURSOR) goto fail; yych = *YYCURSOR; switch (yych) { case ' ': goto yy3; default: goto yy4; } yy4: #line 30 "c/eof/02_bounds_checking.re" { goto loop; } #line 60 "c/eof/02_bounds_checking.c" yy5: ++YYCURSOR; if (YYLIMIT <= YYCURSOR) goto fail; yych = *YYCURSOR; switch (yych) { case '\'': goto yy6; case '\\': goto yy7; default: goto yy5; } yy6: ++YYCURSOR; #line 29 "c/eof/02_bounds_checking.re" { ++count; goto loop; } #line 74 "c/eof/02_bounds_checking.c" yy7: ++YYCURSOR; if (YYLIMIT <= YYCURSOR) goto fail; goto yy5; } #line 32 "c/eof/02_bounds_checking.re" fail: count = -1; exit: free(buf); return count; } #define TEST(s, r) assert(lex(s, sizeof(s) - 1) == r) int main() { TEST("", 0); TEST("'qu\0tes' 'are' 'fine: \\'' ", 3); TEST("'unterminated\\'", -1); TEST("'unexpected \0 null\\'", -1); return 0; }