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/*
* text file with #if contructs --> C program that prints that file
* Bruno Haible 21.2.1993, 3.1.1995, 15.6.1996
* Sam Steingold 2002-07-31
*/
#include <stdlib.h> /* malloc(), realloc(), exit() */
#include <string.h> /* strcpy(), strcat() */
#include <stdio.h>
/* Directory in which to search files for #include <...> */
char* standard_include_path = NULL;
/* get a line, terminated with '\n', or NULL if EOF is encountered
c is its first character */
static unsigned char * get_line (FILE * fp, int c) {
int len = 1;
unsigned char * line = (unsigned char *) malloc(len);
int index = 0;
while (1) {
if (!line) { fprintf(stderr,"Out of memory.\n"); exit(1); }
line[index++] = c;
if (c=='\n') break;
c = getc(fp); if (c==EOF) { free(line); return (unsigned char *) 0; }
if (index >= len)
{ len = 2*len; line = (unsigned char *) realloc((void*)line,len); }
}
return line;
}
/* put back a line to the pool */
static void put_line (unsigned char * line)
{ free(line); }
static void process_file (FILE * fp) {
int c;
while (1) {
c = getc(fp); if (c==EOF) goto eof;
if (c=='#') {
c = getc(fp); if (c==EOF) { putchar('#'); goto eof; }
if ((c=='i') || (c=='e')) {
/* heuristic for #if, #else, #endif, #include */
unsigned char * line = get_line(fp,c);
if (!line) goto eof;
if (line[0]=='i' && line[1]=='n' && line[2]=='c' && line[3]=='l'
&& line[4]=='u' && line[5]=='d' && line[6]=='e' && line[7]==' ') {
char pathname[10240];
unsigned char expect;
unsigned char * ptr = &line[8];
if (!(*ptr == '"' || *ptr == '<')) goto illegal_include;
expect = (*ptr == '"' ? '"' : '>');
ptr++;
while (!(*ptr == '"' || *ptr == '>' || *ptr == '\n')) { ptr++; }
if (*ptr != expect) goto illegal_include;
if (!(ptr[1] == '\n'))
illegal_include:
{ fprintf(stderr,"Invalid #include syntax\n"); exit(1); }
ptr[0] = '\0'; /* replace '"' by '\0' */
if (expect == '"') {
/* Search for the file in the current directory. */
strcpy(pathname, (const char *) &line[9]);
} else {
/* Search for the file in the standard_include_path. */
strcpy(pathname,standard_include_path);
strcat(pathname, (const char *) &line[9]);
}
{ FILE * ifp = fopen(pathname,"r");
if (!ifp) {
fprintf(stderr,"Could not open include file %s\n",pathname);
exit(1);
}
process_file(ifp);
fclose(ifp);
}
} else { /* pass unchanged */
unsigned char * ptr = line;
putchar('#');
do { c = *ptr++; putchar(c); } while (!(c=='\n'));
}
put_line(line);
goto line_ok;
}
printf("printf(\"#\");\n");
}
/* convert line --> printf() instruction */
printf(" printf(\"");
while (1) {
if ((c=='\\') || (c=='\"')) { putchar('\\'); putchar(c); }
#if defined(sun) && !defined(__GNUC__)
else if (c==0377)
{ putchar('\\'); putchar(c); }
#endif
#ifdef QUOTE_QUOTES
else if (c=='\'') { /* instead of "'" output "\047": */
putchar('\\');
putchar('0'+((((unsigned char)'\'')/64)%8));
putchar('0'+((((unsigned char)'\'')/8)%8));
putchar('0'+(((unsigned char)'\'')%8));
}
#endif
else if (c=='%')
{ putchar(c); putchar(c); }
else if (c!='\n')
{ putchar(c); }
else
{ putchar('\\'); putchar('n'); break; }
c = getc(fp); if (c==EOF) { printf("\");\n"); goto eof; }
}
printf("\");\n");
line_ok: ;
}
eof: ;
}
int main (int argc, char* argv[]) {
int i;
for (i = 1; i < argc; i++) {
char* arg = argv[i];
if (arg[0]=='-' && arg[1]=='I') {
standard_include_path = &arg[2];
} else {
fprintf(stderr,"Bad option.\n"); exit(1);
}
}
#ifdef CROSS
printf("#include \"lispbibl.h\"\n");
#else
printf("#include \"lispbibl.c\"\n");
#endif
printf("#include <stdio.h>\n");
printf("#ifdef __cplusplus\n");
printf("extern \"C\" void exit(int);\n");
printf("#endif\n");
printf("\n");
printf("int main () {\n");
process_file(stdin);
printf(" if (ferror(stdout) || fclose(stdout)) { exit(1); }\n");
printf(" exit(0);\n");
printf("}\n");
if (ferror(stdout) || fclose(stdout)) { exit(1); }
exit(0);
}
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