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/*
* Compressor.c : read an input file and store it compressed in
* a C source file containing a char array containing
* the compressed file.
*
* See Copyright for the status of this software.
*
* $Id: compressor.c,v 1.5 1998/05/25 23:57:58 veillard Exp $
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <zlib.h>
#define MAX_PATH_LENGHT 512
char *data_name;
char *data_file = NULL;
int main_argc;
char **main_argv;
char pwd[MAX_PATH_LENGHT];
void create_gz_source(char *filename) {
char outputfile[MAX_PATH_LENGHT];
Bytef *input;
int size;
Bytef *output;
uLongf outsize;
int res;
struct stat st;
int fd;
FILE *result;
int i;
/*
* open and read the input file in a buffer.
*/
fd = open(filename, O_RDONLY);
if (fd < 0) {
perror("mkdep: open");
return;
}
fstat(fd, &st);
size = st.st_size;
input = malloc(size);
if (input == NULL) {
perror("malloc failed");
exit(1);
}
res = read(fd, input, size);
if (res < size) {
perror("read didn't complete");
exit(1);
}
close(fd);
/*
* allocate an output buffer for the compressed result.
*/
outsize = size + (size / 8) + 12;
output = malloc(outsize);
if (output == NULL) {
perror("malloc failed");
exit(1);
}
/*
* compress the whole stuff in one pass.
*/
if (compress(output, (uLongf *) &outsize, input, size) != Z_OK) {
fprintf(stderr, "compress failed\n");
exit(1);
}
/*
* save the whole stuff as a C source file.
*/
if (data_file == NULL) {
sprintf(outputfile, "%s.h", filename);
data_file = &outputfile[0];
}
result = fopen(data_file, "w");
if (result == NULL) {
fprintf(stderr, "fopen(%s)", data_file);
perror("failed");
exit(1);
}
fprintf(result, "/* output from compressor, need #include <zlib.h>\" */\n");
fprintf(result, "#define %s_size %d\n", data_name, size);
fprintf(result, "unsigned char %s[%d] = {", data_name, (int) outsize);
for (i = 0;i < (outsize - 1);i++) {
if (!(i % 15)) fprintf(result, "\n");
fprintf(result, "0x%02x,", output[i]);
}
fprintf(result, "0x%02x\n};\n\n", output[outsize - 1]);
fprintf(result, "char *read_%s(void) {\n", data_name);
fprintf(result, " uLongf size = %d;\n", size + 20);
fprintf(result, " Bytef *buffer = malloc(%d);\n\n", size + 20);
fprintf(result, " if (buffer == NULL) return(NULL);\n");
fprintf(result, " if (uncompress(buffer, &size, %s, %d) != Z_OK) {\n",
data_name, (int) outsize);
fprintf(result, " fprintf(stderr, \"uncompress failed\");\n");
fprintf(result, " free(buffer);\n");
fprintf(result, " return(NULL);\n");
fprintf(result, " }\n");
fprintf(result, " if (size != %d) {\n", size);
fprintf(result, " fprintf(stderr, \"uncompress failed\");\n");
fprintf(result, " free(buffer);\n");
fprintf(result, " return(NULL);\n");
fprintf(result, " }\n");
fprintf(result, " buffer[%d] = '\\0';\n", size);
fprintf(result, " return(buffer);\n}\n");
fclose(result);
}
void message(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
char *get_data_name(char *filename) {
char *res;
char *cur;
res = (char *) malloc((strlen(filename) + 20) * sizeof(char));
sprintf(res, "data_buffer_%s", filename);
cur = res;
while (*cur != '\0') {
if (*cur == '.') *cur = '_';
else if (*cur == ' ') *cur = '_';
else if (*cur == '/') *cur = '_';
else if (*cur == '\t') *cur = '_';
cur++;
}
return(res);
}
int main(int argc, char **argv)
{
char fullname[MAX_PATH_LENGHT];
main_argc = argc;
main_argv = argv;
getcwd(pwd, sizeof(pwd));
while (--argc > 0) {
char *name = *++argv;
if (name[0] == '-') {
switch (name[1]) {
case 'n':
data_name = *++argv;
argc--;
continue;
case 'o':
data_file = *++argv;
argc--;
continue;
default:
/*
* NOTE : dump_h has to be modified accordingly
* if new options are added !
*/
fprintf(stderr,"%s [options] includes ...\n",
argv[0]);
fprintf(stderr,"Options :\n");
fprintf(stderr,"\t-n data_name\n");
fprintf(stderr,"\t-o file_name\n");
exit(1);
}
continue;
}
if (name[0] != '/') {
strcpy(fullname, pwd);
strcat(fullname, "/");
strcat(fullname, name);
} else {
strcpy(fullname, name);
}
/*
* do the work !
*/
data_name = get_data_name(name);
create_gz_source(fullname);
}
return 0;
}
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