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janet/libs/xxd.c
bakpakin 3efd400025 Huge number of changes. Still WIP. Refactoring and
changing C API model. This commit is not i a working state.
2017-09-09 14:39:51 -04:00

98 lines
2.7 KiB
C

/*
* Copyright (c) 2017 Calvin Rose
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/* Simple clone of the xxd tool used at build time. Used to
* create headers out of source files. Only used for core libraries
* like the bootstrapping code and the stl. */
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#define BUFSIZE 1024
#define PERLINE 10
int main(int argc, const char **argv) {
static const char hex[] = "0123456789ABCDEF";
char buf[BUFSIZE];
size_t bytesRead = 0;
int lineIndex = 0;
int line = 0;
if (argc != 4) {
fprintf(stderr, "Usage: %s infile outfile symbol\n", argv[0]);
return 1;
}
/* Open the files */
FILE *in = fopen(argv[1], "rb");
FILE *out = fopen(argv[2], "wb");
/* Check if files open successfully */
if (in == NULL) {
fprintf(stderr, "Could not open input file %s\n", argv[1]);
return 1;
} else if (out == NULL) {
fprintf(stderr, "Could not open output file %s\n", argv[2]);
return 1;
}
/* Write the header */
fprintf(out, "/* Auto generated - DO NOT EDIT */\n\n");
fprintf(out, "#include <stdint.h>\n\n");
fprintf(out, "const uint8_t dst_gen_%s[] = {", argv[3]);
/* Read in chunks from buffer */
while ((bytesRead = fread(buf, 1, sizeof(buf), in)) > 0) {
int i;
for (i = 0; i < bytesRead; ++i) {
int byte = ((uint8_t *)buf) [i];
/* Write the byte */
if (lineIndex++ == 0) {
if (line++)
fputc(',', out);
fputs("\n\t", out);
} else {
fputs(", ", out);
}
fputs("0x", out);
fputc(hex[byte & 0xF], out);
fputc(hex[byte >> 4], out);
/* Make line index wrap */
if (lineIndex >= PERLINE)
lineIndex = 0;
}
}
/* Write the tail */
fputs("\n};\n", out);
/* Close the file handles */
fclose(in);
fclose(out);
return 0;
}