diff options
Diffstat (limited to 'package/libtirpc/src/rpcgen/rpc_scan.c')
| -rw-r--r-- | package/libtirpc/src/rpcgen/rpc_scan.c | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/package/libtirpc/src/rpcgen/rpc_scan.c b/package/libtirpc/src/rpcgen/rpc_scan.c new file mode 100644 index 000000000..f58fa9f39 --- /dev/null +++ b/package/libtirpc/src/rpcgen/rpc_scan.c @@ -0,0 +1,474 @@ +/* + * Copyright (c) 2009, Sun Microsystems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * - Neither the name of Sun Microsystems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#if 0 +static char sccsid[] = "@(#)rpc_scan.c 1.11 89/02/22 (C) 1987 SMI"; +#endif + +/* + * rpc_scan.c, Scanner for the RPC protocol compiler + * Copyright (C) 1987, Sun Microsystems, Inc. + */ +#include <stdio.h> +#include <ctype.h> +#include <string.h> +#include "rpc_scan.h" +#include "rpc_parse.h" +#include "rpc_util.h" + +static void unget_token(token *tokp); +static void findstrconst(char **str, char **val); +static void findchrconst(char **str, char **val); +static void findconst(char **str, char **val); +static void findkind(char **mark, token *tokp); +static int cppline(char *line); +static int directive(char *line); +static void printdirective(char *line); +static void docppline(char *line, int *lineno, char **fname); + +#define startcomment(where) (where[0] == '/' && where[1] == '*') +#define endcomment(where) (where[-1] == '*' && where[0] == '/') + +static int pushed = 0; /* is a token pushed */ +static token lasttok; /* last token, if pushed */ + +/* + * scan expecting 1 given token + */ +void +scan(tok_kind expect, token *tokp) +{ + get_token(tokp); + if (tokp->kind != expect) { + expected1(expect); + } +} + +/* + * scan expecting any of the 2 given tokens + */ +void +scan2(tok_kind expect1, tok_kind expect2, token *tokp) +{ + get_token(tokp); + if (tokp->kind != expect1 && tokp->kind != expect2) { + expected2(expect1, expect2); + } +} + +/* + * scan expecting any of the 3 given token + */ +void +scan3(tok_kind expect1, tok_kind expect2, tok_kind expect3, token *tokp) +{ + get_token(tokp); + if (tokp->kind != expect1 && tokp->kind != expect2 + && tokp->kind != expect3) { + expected3(expect1, expect2, expect3); + } +} + +/* + * scan expecting a constant, possibly symbolic + */ +void +scan_num(token *tokp) +{ + get_token(tokp); + switch (tokp->kind) { + case TOK_IDENT: + break; + default: + error("constant or identifier expected"); + } +} + +/* + * Peek at the next token + */ +void +peek(token *tokp) +{ + get_token(tokp); + unget_token(tokp); +} + +/* + * Peek at the next token and scan it if it matches what you expect + */ +int +peekscan(tok_kind expect, token *tokp) +{ + peek(tokp); + if (tokp->kind == expect) { + get_token(tokp); + return (1); + } + return (0); +} + +/* + * Get the next token, printing out any directive that are encountered. + */ +void +get_token(token *tokp) +{ + int commenting; + + if (pushed) { + pushed = 0; + *tokp = lasttok; + return; + } + commenting = 0; + for (;;) { + if (*where == 0) { + for (;;) { + if (!fgets(curline, MAXLINESIZE, fin)) { + tokp->kind = TOK_EOF; + *where = 0; + return; + } + linenum++; + if (commenting) { + break; + } else if (cppline(curline)) { + docppline(curline, &linenum, + &infilename); + } else if (directive(curline)) { + printdirective(curline); + } else { + break; + } + } + where = curline; + } else if (isspace(*where)) { + while (isspace(*where)) { + where++; /* eat */ + } + } else if (commenting) { + for (where++; *where; where++) { + if (endcomment(where)) { + where++; + commenting--; + break; + } + } + } else if (startcomment(where)) { + where += 2; + commenting++; + } else { + break; + } + } + + /* + * 'where' is not whitespace, comment or directive Must be a token! + */ + switch (*where) { + case ':': + tokp->kind = TOK_COLON; + where++; + break; + case ';': + tokp->kind = TOK_SEMICOLON; + where++; + break; + case ',': + tokp->kind = TOK_COMMA; + where++; + break; + case '=': + tokp->kind = TOK_EQUAL; + where++; + break; + case '*': + tokp->kind = TOK_STAR; + where++; + break; + case '[': + tokp->kind = TOK_LBRACKET; + where++; + break; + case ']': + tokp->kind = TOK_RBRACKET; + where++; + break; + case '{': + tokp->kind = TOK_LBRACE; + where++; + break; + case '}': + tokp->kind = TOK_RBRACE; + where++; + break; + case '(': + tokp->kind = TOK_LPAREN; + where++; + break; + case ')': + tokp->kind = TOK_RPAREN; + where++; + break; + case '<': + tokp->kind = TOK_LANGLE; + where++; + break; + case '>': + tokp->kind = TOK_RANGLE; + where++; + break; + + case '"': + tokp->kind = TOK_STRCONST; + findstrconst(&where, &tokp->str); + break; + case '\'': + tokp->kind = TOK_CHARCONST; + findchrconst(&where, &tokp->str); + break; + + case '-': + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + tokp->kind = TOK_IDENT; + findconst(&where, &tokp->str); + break; + + default: + if (!(isalpha(*where) || *where == '_')) { + char buf[100]; + char *p; + + s_print(buf, "illegal character in file: "); + p = buf + strlen(buf); + if (isprint(*where)) { + s_print(p, "%c", *where); + } else { + s_print(p, "%d", *where); + } + error(buf); + } + findkind(&where, tokp); + break; + } +} + +static void +unget_token(token *tokp) +{ + lasttok = *tokp; + pushed = 1; +} + +static void +findstrconst(char **str, char **val) +{ + char *p; + int size; + + p = *str; + do { + *p++; + } while (*p && *p != '"'); + if (*p == 0) { + error("unterminated string constant"); + } + p++; + size = p - *str; + *val = alloc(size + 1); + (void) strncpy(*val, *str, size); + (*val)[size] = 0; + *str = p; +} + +static void +findchrconst(char **str, char **val) +{ + char *p; + int size; + + p = *str; + do { + *p++; + } while (*p && *p != '\''); + if (*p == 0) { + error("unterminated string constant"); + } + p++; + size = p - *str; + if (size != 3) { + error("empty char string"); + } + *val = alloc(size + 1); + (void) strncpy(*val, *str, size); + (*val)[size] = 0; + *str = p; +} + +static void +findconst(char **str, char **val) +{ + char *p; + int size; + + p = *str; + if (*p == '0' && *(p + 1) == 'x') { + p++; + do { + p++; + } while (isxdigit(*p)); + } else { + do { + p++; + } while (isdigit(*p)); + } + size = p - *str; + *val = alloc(size + 1); + (void) strncpy(*val, *str, size); + (*val)[size] = 0; + *str = p; +} + +static token symbols[] = { + {TOK_CONST, "const"}, + {TOK_UNION, "union"}, + {TOK_SWITCH, "switch"}, + {TOK_CASE, "case"}, + {TOK_DEFAULT, "default"}, + {TOK_STRUCT, "struct"}, + {TOK_TYPEDEF, "typedef"}, + {TOK_ENUM, "enum"}, + {TOK_OPAQUE, "opaque"}, + {TOK_BOOL, "bool"}, + {TOK_VOID, "void"}, + {TOK_CHAR, "char"}, + {TOK_INT, "int"}, + {TOK_UNSIGNED, "unsigned"}, + {TOK_SHORT, "short"}, + {TOK_INT32, "int32"}, + {TOK_FLOAT, "float"}, + {TOK_DOUBLE, "double"}, + {TOK_STRING, "string"}, + {TOK_PROGRAM, "program"}, + {TOK_VERSION, "version"}, + {TOK_EOF, "??????"}, +}; + +static void +findkind(char **mark, token *tokp) +{ + int len; + token *s; + char *str; + + str = *mark; + for (s = symbols; s->kind != TOK_EOF; s++) { + len = strlen(s->str); + if (strncmp(str, s->str, len) == 0) { + if (!isalnum(str[len]) && str[len] != '_') { + tokp->kind = s->kind; + tokp->str = s->str; + *mark = str + len; + return; + } + } + } + tokp->kind = TOK_IDENT; + for (len = 0; isalnum(str[len]) || str[len] == '_'; len++); + tokp->str = alloc(len + 1); + (void) strncpy(tokp->str, str, len); + tokp->str[len] = 0; + *mark = str + len; +} + +static int +cppline(char *line) +{ + return (line == curline && *line == '#'); +} + +static int +directive(char *line) +{ + return (line == curline && *line == '%'); +} + +static void +printdirective(char *line) +{ + f_print(fout, "%s", line + 1); +} + +static void +docppline(char *line, int *lineno, char **fname) +{ + char *file; + int num; + char *p; + + line++; + while (isspace(*line)) { + line++; + } + num = atoi(line); + while (isdigit(*line)) { + line++; + } + while (isspace(*line)) { + line++; + } + if (*line != '"') { + error("preprocessor error"); + } + line++; + p = file = alloc(strlen(line) + 1); + while (*line && *line != '"') { + *p++ = *line++; + } + if (*line == 0) { + error("preprocessor error"); + } + *p = 0; + if (*file == 0) { + *fname = NULL; + free(file); + } else { + *fname = file; + } + *lineno = num - 1; +} |