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>
54 #include "rpc_parse.h"
57 #define startcomment(where) (where[0] == '/' && where[1] == '*')
58 #define endcomment(where) (where[-1] == '*' && where[0] == '/')
59 #define verbatimstart(p) (*(p) == '@' && *((p) + 1) == '{')
60 #define verbatimend(p) (*(p) == '@' && *((p) + 1) == '}')
62 int pushed = 0; /* is a token pushed */
63 token lasttok; /* last token, if pushed */
66 /* static prototypes */
67 static void findstrconst(char **str, char **val);
68 static void findconst(char **str, char **val);
69 static int cppline(char *line);
70 static int directive(char *line);
71 static void docppline(char *line, int *lineno, char **fname);
73 static void deverbatim(void);
78 * scan expecting 1 given token
81 scan(tok_kind expect, token * tokp)
84 if (tokp->kind != expect) {
90 * scan expecting 2 given tokens
93 scan2(tok_kind expect1, tok_kind expect2, token * tokp)
96 if (tokp->kind != expect1 && tokp->kind != expect2) {
97 expected2(expect1, expect2);
102 * scan expecting 3 given token
105 scan3(tok_kind expect1, tok_kind expect2, tok_kind expect3, token * tokp)
108 if (tokp->kind != expect1 && tokp->kind != expect2
109 && tokp->kind != expect3) {
110 expected3(expect1, expect2, expect3);
116 * scan expecting 4 given token
119 scan4(tok_kind expect1, tok_kind expect2, tok_kind expect3, tok_kind expect4,
123 if (tokp->kind != expect1 && tokp->kind != expect2
124 && tokp->kind != expect3 && tokp->kind != expect4) {
125 expected4(expect1, expect2, expect3, expect4);
130 * scan expecting a constant, possibly symbolic
133 scan_num(token * tokp)
136 switch (tokp->kind) {
140 error("constant or identifier expected");
146 * Peek at the next token
157 * Peek at the next token and scan it if it matches what you expect
160 peekscan(tok_kind expect, token * tokp)
163 if (tokp->kind == expect) {
173 * Get the next token, printing out any directive that are encountered.
176 get_token(token * tokp)
190 if (!fgets(curline, MAXLINESIZE, fin)) {
191 tokp->kind = TOK_EOF;
197 fputs(curline, fout);
202 } else if (cppline(curline)) {
203 #if defined(AFS_DARWIN_ENV)
204 if (strncmp(curline, "#pragma", 7) == 0)
206 #endif /* defined(AFS_DARWIN_ENV) */
207 docppline(curline, &linenum, &infilename);
208 } else if (directive(curline)) {
209 printdirective(curline);
215 } else if (isspace(*where)) {
216 while (isspace(*where)) {
219 } else if (verbatim) {
221 if (verbatimend(where)) {
225 } else if (verbatimstart(where)) {
228 } else if (commenting) {
230 if (endcomment(where)) {
234 } else if (startcomment(where)) {
243 * 'where' is not whitespace, comment or directive Must be a token!
247 tokp->kind = TOK_COLON;
251 tokp->kind = TOK_SEMICOLON;
255 tokp->kind = TOK_COMMA;
259 tokp->kind = TOK_EQUAL;
263 tokp->kind = TOK_STAR;
267 tokp->kind = TOK_LBRACKET;
271 tokp->kind = TOK_RBRACKET;
275 tokp->kind = TOK_LBRACE;
279 tokp->kind = TOK_RBRACE;
283 tokp->kind = TOK_LPAREN;
287 tokp->kind = TOK_RPAREN;
291 tokp->kind = TOK_LANGLE;
295 tokp->kind = TOK_RANGLE;
300 tokp->kind = TOK_STRCONST;
301 findstrconst(&where, &tokp->str);
315 tokp->kind = TOK_IDENT;
316 findconst(&where, &tokp->str);
321 if (!(isalpha(*where) || *where == '_')) {
325 s_print(buf, "illegal character in file: ");
326 p = buf + strlen(buf);
327 if (isprint(*where)) {
328 s_print(p, "%c", *where);
330 s_print(p, "%d", *where);
334 findkind(&where, tokp);
341 unget_token(token * tokp)
349 findstrconst(char **str, char **val)
357 } while (*p && *p != '"');
359 error("unterminated string constant");
362 size = (int)(p - *str);
363 *val = alloc(size + 1);
364 (void)strncpy(*val, *str, size);
370 findconst(char **str, char **val)
376 if (*p == '0' && *(p + 1) == 'x') {
380 } while (isxdigit(*p));
384 } while (isdigit(*p));
386 size = (int)(p - *str);
387 *val = alloc(size + 1);
388 (void)strncpy(*val, *str, size);
395 static token symbols[] = {
396 {TOK_CONST, "const"},
397 {TOK_UNION, "union"},
398 {TOK_SWITCH, "switch"},
400 {TOK_DEFAULT, "default"},
401 {TOK_STRUCT, "struct"},
402 {TOK_TYPEDEF, "typedef"},
404 {TOK_OPAQUE, "opaque"},
409 {TOK_UNSIGNED, "unsigned"},
410 {TOK_SHORT, "short"},
411 {TOK_INT32, "afs_int32"},
412 {TOK_FLOAT, "float"},
413 {TOK_DOUBLE, "double"},
414 {TOK_STRING, "string"},
415 {TOK_PROGRAM, "program"},
416 {TOK_VERSION, "version"},
417 {TOK_PACKAGE, "package"},
418 {TOK_PREFIX, "prefix"},
419 {TOK_STATINDEX, "statindex"},
420 {TOK_SPECIAL, "special"},
421 {TOK_STARTINGOPCODE, "startingopcode"},
422 {TOK_CUSTOMIZED, "customized"},
424 {TOK_SPLITPREFIX, "splitprefix"},
425 {TOK_SPLIT, "split"},
426 {TOK_MULTI, "multi"},
429 {TOK_INOUT, "INOUT"},
430 {TOK_AFSUUID, "afsUUID"},
436 findkind(char **mark, token * tokp)
444 for (s = symbols; s->kind != TOK_EOF; s++) {
445 len = (int)strlen(s->str);
446 if (strncmp(str, s->str, len) == 0) {
447 if (!isalnum(str[len]) && str[len] != '_') {
448 tokp->kind = s->kind;
455 tokp->kind = TOK_IDENT;
456 for (len = 0; isalnum(str[len]) || str[len] == '_'; len++);
457 tokp->str = alloc(len + 1);
458 (void)strncpy(tokp->str, str, len);
466 return (line == curline && *line == '#');
470 directive(char *line)
472 return (line == curline && *line == '%');
476 printdirective(char *line)
478 f_print(fout, "%s", line + 1);
482 docppline(char *line, int *lineno, char **fname)
489 while (isspace(*line)) {
493 while (isdigit(*line)) {
496 while (isspace(*line)) {
508 if (!strncmp(line, "line", 4)) {
516 error("preprocessor error");
519 p = file = alloc(strlen(line) + 1);
520 while (*line && *line != '"') {
524 error("preprocessor error");
537 /* doesn't appear to be used */
541 for (where += 2; !verbatimend(where); where++) {
543 if (!fgets(curline, MAXLINESIZE, fin)) {
544 error("unterminated code: %} is missing");
548 if (verbatimend(curline)) {
552 fputs(curline, fout);