mirror of
https://github.com/cesanta/mongoose.git
synced 2024-11-27 20:59:00 +08:00
113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
// Copyright (c) Cesanta Software Limited
|
|
// All rights reserved.
|
|
|
|
// This program is used to pack arbitrary data into a C binary. It takes
|
|
// a list of files as an input, and produces a .c data file that contains
|
|
// contents of all these files as a collection of byte arrays.
|
|
//
|
|
// Usage:
|
|
// 1. Compile this file:
|
|
// cc -o pack pack.c
|
|
//
|
|
// 2. Convert list of files into single .c:
|
|
// ./pack file1.data file2.data > fs.c
|
|
//
|
|
// 3. In your application code, you can access files using this function:
|
|
// const char *mg_unpack(const char *file_name, size_t *size);
|
|
//
|
|
// 4. Build your app with fs.c:
|
|
// cc -o my_app my_app.c fs.c
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/stat.h>
|
|
|
|
static const char *code =
|
|
"static int scmp(const char *a, const char *b) {\n"
|
|
" while (*a && (*a == *b)) a++, b++;\n"
|
|
" return *(const unsigned char *) a - *(const unsigned char *) b;\n"
|
|
"}\n"
|
|
"const char *mg_unlist(size_t no);\n"
|
|
"const char *mg_unlist(size_t no) {\n"
|
|
" return packed_files[no].name;\n"
|
|
"}\n"
|
|
"const char *mg_unpack(const char *path, size_t *size, time_t *mtime);\n"
|
|
"const char *mg_unpack(const char *name, size_t *size, time_t *mtime) {\n"
|
|
" const struct packed_file *p;\n"
|
|
" for (p = packed_files; p->name != NULL; p++) {\n"
|
|
" if (scmp(p->name, name) != 0) continue;\n"
|
|
" if (size != NULL) *size = p->size - 1;\n"
|
|
" if (mtime != NULL) *mtime = p->mtime;\n"
|
|
" return (const char *) p->data;\n"
|
|
" }\n"
|
|
" return NULL;\n"
|
|
"}\n";
|
|
|
|
int main(int argc, char *argv[]) {
|
|
int i, j, ch;
|
|
const char *strip_prefix = "";
|
|
|
|
printf("%s", "#include <stddef.h>\n");
|
|
printf("%s", "#include <string.h>\n");
|
|
printf("%s", "#include <time.h>\n");
|
|
printf("%s", "\n");
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
if (strcmp(argv[i], "-s") == 0) {
|
|
strip_prefix = argv[++i];
|
|
} else if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
|
|
fprintf(stderr, "Usage: %s[-s STRIP_PREFIX] files...\n", argv[0]);
|
|
exit(EXIT_FAILURE);
|
|
} else {
|
|
char ascii[12];
|
|
FILE *fp = fopen(argv[i], "rb");
|
|
if (fp == NULL) {
|
|
fprintf(stderr, "Cannot open [%s]: %s\n", argv[i], strerror(errno));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
printf("static const unsigned char v%d[] = {\n", i);
|
|
for (j = 0; (ch = fgetc(fp)) != EOF; j++) {
|
|
if (j == (int) sizeof(ascii)) {
|
|
printf(" // %.*s\n", j, ascii);
|
|
j = 0;
|
|
}
|
|
ascii[j] = (char) ((ch >= ' ' && ch <= '~' && ch != '\\') ? ch : '.');
|
|
printf(" %3u,", ch);
|
|
}
|
|
// Append zero byte at the end, to make text files appear in memory
|
|
// as nul-terminated strings.
|
|
// printf(" 0 // %.*s\n", (int) sizeof(ascii), ascii);
|
|
printf(" 0 // %.*s\n};\n", j, ascii);
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|
|
printf("%s", "\nstatic const struct packed_file {\n");
|
|
printf("%s", " const char *name;\n");
|
|
printf("%s", " const unsigned char *data;\n");
|
|
printf("%s", " size_t size;\n");
|
|
printf("%s", " time_t mtime;\n");
|
|
printf("%s", "} packed_files[] = {\n");
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
struct stat st;
|
|
const char *name = argv[i];
|
|
size_t n = strlen(strip_prefix);
|
|
if (strcmp(argv[i], "-s") == 0) {
|
|
i++;
|
|
continue;
|
|
}
|
|
stat(argv[i], &st);
|
|
if (strncmp(name, strip_prefix, n) == 0) name += n;
|
|
printf(" {\"/%s\", v%d, sizeof(v%d), %lu},\n", name, i, i, st.st_mtime);
|
|
}
|
|
printf("%s", " {NULL, NULL, 0, 0}\n");
|
|
printf("%s", "};\n\n");
|
|
printf("%s", code);
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|