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Digital Research
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ASSEMBLY & COMPILE TOOLS/PLM-2-C 2/plm2c/main.c
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248
ASSEMBLY & COMPILE TOOLS/PLM-2-C 2/plm2c/main.c
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#include <stdio.h>
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#ifdef IBMPC
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#include <stdlib.h>
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#include <sys\stat.h>
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#else
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#include <sys/types.h>
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#include <sys/stat.h>
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#endif
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#include <fcntl.h>
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#include "misc.h"
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#include "defs.h"
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#include "cvt.h"
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#include "struct.h"
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#include "tokens.h"
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#include "tkn_defs.h"
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char *text_buffer, *text_ptr;
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int line_count;
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char *line_ptr;
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char current_file_name[128];
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char out_file_name[128];
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int at_decl_count;
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char at_decl_list[MAX_AT_DECLS][MAX_TOKEN_LENGTH];
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FILE *ofd;
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int file_depth;
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FILE *fopen();
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/*
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* Get list of AT declaration variables for EXTERNAL declaration checks
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*/
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get_at_decl()
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{
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int i, fd;
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char ch;
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at_decl_count = 0;
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if ((fd = open("at_decl.cvt", O_RDONLY)) == -1)
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/* Not found */
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return;
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while (read(fd, &ch, 1) == 1) {
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i = 0;
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if (!is_a_char(ch)) {
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fprintf(stderr, "Illegal identifier in line %d at_decl.cvt\n",
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at_decl_count + 1);
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exit(1);
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}
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do {
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#ifdef CONVERT_CASE
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if (is_a_uc_char(ch))
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/* Convert to lower case */
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ch += 32;
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else
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if (is_a_lc_char(ch))
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/* Convert to upper case */
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ch -= 32;
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#endif
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at_decl_list[at_decl_count][i++] = ch;
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if (read(fd, &ch, 1) != 1) {
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fprintf(stderr, "Unexpected EOF in at_decl.cvt\n");
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exit(1);
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}
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} while ((ch != '\n') && (ch != ' '));
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at_decl_list[at_decl_count++][i] = '\0';
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}
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}
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/*
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* Open specified file, init options, and parse.
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*/
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cvt_file(file_name)
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char *file_name;
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{
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int fd, nr;
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struct stat file_stat;
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TOKEN token, fname_token, token_module, token_do;
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int token_class;
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char *tmp_text_buffer, *tmp_text_ptr, *tmp_line_ptr;
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char *tmp_ptr;
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int tmp_line_count;
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char tmp_file_name[128];
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char *get_mem();
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/* Is this the first file? */
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if (file_depth) {
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/* No - save old text pointers */
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tmp_text_buffer = text_buffer;
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tmp_text_ptr = text_ptr;
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tmp_line_ptr = line_ptr;
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tmp_line_count = line_count;
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(void) strcpy(tmp_file_name, current_file_name);
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}
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/* Save file name */
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(void) strcpy(current_file_name, file_name);
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/* Open file */
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if ((fd = open(file_name, O_RDONLY)) == -1) {
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(void) fprintf(stderr, "Cannot open input file %s", file_name);
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perror("");
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exit(1);
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}
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/* Get length */
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if (fstat(fd, &file_stat)) {
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perror("Cannot stat input file");
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exit(1);
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}
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/* Allocate that much RAM */
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text_buffer = get_mem((unsigned int) file_stat.st_size + 1);
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/* Read file */
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if ((nr = read(fd, text_buffer, (int) file_stat.st_size)) == -1) {
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perror("Cannot read input file");
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exit(1);
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}
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/* Insert End-of-file Mark */
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text_buffer[nr] = '\0';
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(void) close(fd);
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/* Init pointers */
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text_ptr = text_buffer;
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line_ptr = text_ptr;
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line_count = 1;
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/* Init I/O */
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out_init();
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/* Start with initial context using file name */
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(void) strcpy(fname_token.token_name, file_name);
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fname_token.token_class = IDENTIFIER;
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new_context(MODULE, &fname_token);
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/* Is this the first file? */
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if (file_depth++ == 0) {
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/* Yes - open output file */
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if ((ofd = fopen(out_file_name, "w")) == NULL) {
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(void) fprintf(stderr, "Cannot create output file %s",
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out_file_name);
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exit(1);
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}
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/* Check for module name */
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token_class = get_token(&token_module);
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out_pre_white(&token_module);
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tmp_ptr = token_module.token_start;
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if ((token_class == IDENTIFIER) &&
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/* Maybe got module name - Check for : */
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(get_token(&token) == LABEL) &&
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/* Check for DO; */
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((get_token(&token_do) == RESERVED) &&
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(token_do.token_type == DO)) &&
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(get_token(&token) == END_OF_LINE)) {
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/* Got module header */
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out_pre_white(&token_do);
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/* Parse to END [<module name>] */
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parse_till_end(&token);
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out_white_space(&token);
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token_class = get_token(&token);
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if (token_class == IDENTIFIER) {
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out_pre_white(&token);
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token_class = get_token(&token);
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}
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/* Should be at end of line */
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if (token_class != END_OF_LINE) {
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parse_error("';' expected");
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}
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/* Should be at end of file */
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if (get_token(&token) != END_OF_FILE) {
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parse_error("End of file expected");
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}
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out_white_space(&token);
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} else {
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out_pre_white(&token_do);
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parse_warning("Module name expected");
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text_ptr = tmp_ptr;
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parse_file();
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}
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} else
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parse_file();
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free(text_buffer);
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/* Was this the first file? */
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if (--file_depth) {
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/* No - restore old text pointers */
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text_buffer = tmp_text_buffer;
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text_ptr = tmp_text_ptr;
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line_ptr = tmp_line_ptr;
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line_count = tmp_line_count;
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(void) strcpy(current_file_name, tmp_file_name);
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} else
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exit(0);
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}
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/*
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* Open file and init options
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*/
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int i;
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char ch;
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if (argc != 2) {
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(void) fprintf(stderr, "usage: %s filename\n", argv[0]);
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exit(1);
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}
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/* Search for a '.' in filename */
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for (i = strlen(argv[1]) - 1; i; i--) {
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ch = argv[1][i];
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if ((ch == '.') || (ch == '/') || (ch == '\\'))
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break;
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}
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if (ch != '.')
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i = strlen(argv[1]);
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/* Append a '.c' */
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(void) strncpy(out_file_name, argv[1], i);
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out_file_name[i] = '\0';
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(void) strcat(out_file_name, ".c");
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(void) printf("Output to: %s\n", out_file_name);
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/* Get AT declaration list */
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get_at_decl();
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/* Init context */
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init_context();
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file_depth = 0;
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/* Parse main file */
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cvt_file(argv[1]);
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}
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