1 /* @(#)rpc_scan.c 1.1 87/11/04 3.9 RPCSRC */
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28 * Mountain View, California 94043
32 * rpc_scan.c, Scanner for the RPC protocol compiler
33 * Copyright (C) 1987, Sun Microsystems, Inc.
36 /* Portions Copyright (c) 2003 Apple Computer, Inc. */
37 #include <afsconfig.h>
38 #include <afs/param.h>
45 #include "rpc_parse.h"
48 #define startcomment(where) (where[0] == '/' && where[1] == '*')
49 #define endcomment(where) (where[-1] == '*' && where[0] == '/')
50 #define verbatimstart(p) (*(p) == '@' && *((p) + 1) == '{')
51 #define verbatimend(p) (*(p) == '@' && *((p) + 1) == '}')
53 int pushed = 0; /* is a token pushed */
54 token lasttok; /* last token, if pushed */
57 /* static prototypes */
58 static void findstrconst(char **str, char **val);
59 static void findconst(char **str, char **val);
60 static int cppline(char *line);
61 static int directive(char *line);
62 static void docppline(char *line, int *lineno, char **fname);
65 * scan expecting 1 given token
68 scan(tok_kind expect, token * tokp)
71 if (tokp->kind != expect) {
77 * scan expecting 2 given tokens
80 scan2(tok_kind expect1, tok_kind expect2, token * tokp)
83 if (tokp->kind != expect1 && tokp->kind != expect2) {
84 expected2(expect1, expect2);
89 * scan expecting 3 given token
92 scan3(tok_kind expect1, tok_kind expect2, tok_kind expect3, token * tokp)
95 if (tokp->kind != expect1 && tokp->kind != expect2
96 && tokp->kind != expect3) {
97 expected3(expect1, expect2, expect3);
103 * scan expecting 4 given token
106 scan4(tok_kind expect1, tok_kind expect2, tok_kind expect3, tok_kind expect4,
110 if (tokp->kind != expect1 && tokp->kind != expect2
111 && tokp->kind != expect3 && tokp->kind != expect4) {
112 expected4(expect1, expect2, expect3, expect4);
117 * scan expecting a constant, possibly symbolic
120 scan_num(token * tokp)
123 switch (tokp->kind) {
127 error("constant or identifier expected");
133 * Peek at the next token
144 * Peek at the next token and scan it if it matches what you expect
147 peekscan(tok_kind expect, token * tokp)
150 if (tokp->kind == expect) {
160 * Get the next token, printing out any directive that are encountered.
163 get_token(token * tokp)
177 if (!fgets(curline, MAXLINESIZE, fin)) {
178 tokp->kind = TOK_EOF;
184 fputs(curline, fout);
189 } else if (cppline(curline)) {
190 #if defined(AFS_DARWIN_ENV)
191 if (strncmp(curline, "#pragma", 7) == 0)
193 #endif /* defined(AFS_DARWIN_ENV) */
194 docppline(curline, &linenum, &infilename);
195 } else if (directive(curline)) {
196 printdirective(curline);
202 } else if (isspace(*where)) {
203 while (isspace(*where)) {
206 } else if (verbatim) {
208 if (verbatimend(where)) {
212 } else if (verbatimstart(where)) {
215 } else if (commenting) {
217 if (endcomment(where)) {
221 } else if (startcomment(where)) {
230 * 'where' is not whitespace, comment or directive Must be a token!
234 tokp->kind = TOK_COLON;
238 tokp->kind = TOK_SEMICOLON;
242 tokp->kind = TOK_COMMA;
246 tokp->kind = TOK_EQUAL;
250 tokp->kind = TOK_STAR;
254 tokp->kind = TOK_LBRACKET;
258 tokp->kind = TOK_RBRACKET;
262 tokp->kind = TOK_LBRACE;
266 tokp->kind = TOK_RBRACE;
270 tokp->kind = TOK_LPAREN;
274 tokp->kind = TOK_RPAREN;
278 tokp->kind = TOK_LANGLE;
282 tokp->kind = TOK_RANGLE;
287 tokp->kind = TOK_STRCONST;
288 findstrconst(&where, &tokp->str);
302 tokp->kind = TOK_IDENT;
303 findconst(&where, &tokp->str);
308 if (!(isalpha(*where) || *where == '_')) {
312 s_print(buf, "illegal character in file: ");
313 p = buf + strlen(buf);
314 if (isprint(*where)) {
315 s_print(p, "%c", *where);
317 s_print(p, "%d", *where);
321 findkind(&where, tokp);
328 unget_token(token * tokp)
336 findstrconst(char **str, char **val)
344 } while (*p && *p != '"');
346 error("unterminated string constant");
349 size = (int)(p - *str);
350 *val = alloc(size + 1);
351 (void)strncpy(*val, *str, size);
357 findconst(char **str, char **val)
363 if (*p == '0' && *(p + 1) == 'x') {
367 } while (isxdigit(*p));
371 } while (isdigit(*p));
373 size = (int)(p - *str);
374 *val = alloc(size + 1);
375 (void)strncpy(*val, *str, size);
382 static token symbols[] = {
383 {TOK_CONST, "const"},
384 {TOK_UNION, "union"},
385 {TOK_SWITCH, "switch"},
387 {TOK_DEFAULT, "default"},
388 {TOK_STRUCT, "struct"},
389 {TOK_TYPEDEF, "typedef"},
391 {TOK_OPAQUE, "opaque"},
396 {TOK_UNSIGNED, "unsigned"},
397 {TOK_SHORT, "short"},
398 {TOK_INT32, "afs_int32"},
399 {TOK_FLOAT, "float"},
400 {TOK_DOUBLE, "double"},
401 {TOK_STRING, "string"},
402 {TOK_PACKAGE, "package"},
403 {TOK_PREFIX, "prefix"},
404 {TOK_STATINDEX, "statindex"},
405 {TOK_SPECIAL, "special"},
406 {TOK_STARTINGOPCODE, "startingopcode"},
407 {TOK_CUSTOMIZED, "customized"},
409 {TOK_SPLITPREFIX, "splitprefix"},
410 {TOK_SPLIT, "split"},
411 {TOK_MULTI, "multi"},
414 {TOK_INOUT, "INOUT"},
415 {TOK_AFSUUID, "afsUUID"},
421 findkind(char **mark, token * tokp)
429 for (s = symbols; s->kind != TOK_EOF; s++) {
430 len = (int)strlen(s->str);
431 if (strncmp(str, s->str, len) == 0) {
432 if (!isalnum(str[len]) && str[len] != '_') {
433 tokp->kind = s->kind;
440 tokp->kind = TOK_IDENT;
441 for (len = 0; isalnum(str[len]) || str[len] == '_'; len++);
442 tokp->str = alloc(len + 1);
443 (void)strncpy(tokp->str, str, len);
451 return (line == curline && *line == '#');
455 directive(char *line)
457 return (line == curline && *line == '%');
461 printdirective(char *line)
463 f_print(fout, "%s", line + 1);
467 docppline(char *line, int *lineno, char **fname)
474 while (isspace(*line)) {
478 while (isdigit(*line)) {
481 while (isspace(*line)) {
493 if (!strncmp(line, "line", 4)) {
501 error("preprocessor error");
504 p = file = alloc(strlen(line) + 1);
505 while (*line && *line != '"') {
509 error("preprocessor error");