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/* Copyright 2013 Bernhard R. Link <brlink@debian.org>
*
* 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
* SOFTWARE IN THE PUBLIC INTEREST, INC. 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.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <endian.h>
#include <errno.h>
#include "globals.h"
#define EFF_INTERNAL 1
#include "eff.h"
/* some trivial little extensible file format - write support */
struct effwriter {
char *filename;
FILE *file;
block_type typecount;
struct efftype {
block_type id;
char *name;
} *types;
size_t depth;
};
static void eff_write(const void *buffer, size_t len, struct effwriter *file) {
ssize_t r;
if (file->depth == 0)
fail("Internal error: trying to write past EOF marker.");
r = fwrite(buffer, len, 1, file->file);
if (r < 0)
fail("Error %d writing to '%s': %s", errno, file->filename,
strerror(errno));
if (r != 1)
fail("Unexpectedend error writing to file '%s'", file->filename);
}
struct effwriter *eff_create(const char *filename, const char *type) {
struct effwriter *f;
size_t typelen = strlen(type);
unsigned char buffer[5];
assert(typelen < 256);
f = zNEW(1, struct effwriter);
f->depth = 1;
f->typecount = BT_BLOCKSTART;
f->filename = strdup(filename);
if (f->filename == NULL)
oom();
if (strcmp(filename, "-") == 0)
f->file = fdopen(1, "wb");
else
f->file = fopen(filename, "wb");
if (f == NULL)
fail("Error %d creating '%s': %s",
errno, filename, strerror(errno));
errno = 0;
memcpy(buffer, "eff", 3);
buffer[3] = 0;
buffer[4] = typelen;
eff_write(buffer, 5, f);
eff_write(type, typelen, f);
return f;
}
void eff_writestart(struct effwriter *file, const char *type) {
struct efftype *et;
block_type tid;
uint8_t buffer[3];
for (et = file->types;
et < file->types + file->typecount - BT_BLOCKSTART;
et++) {
if (strcmp(et->name, type) == 0)
break;
}
tid = et - file->types + BT_BLOCKSTART;
if (tid >= file->typecount) {
assert (tid == file->typecount);
if (tid == BT_MAX)
fail("Too many file block types for this version");
RESIZE(&file->types, tid + 1 - BT_BLOCKSTART, struct efftype);
et = file->types + tid - BT_BLOCKSTART;
et->id = tid;
et->name = strdup(type);
if (et->name == NULL)
oom();
buffer[0] = BT_TYPE;
buffer[1] = strlen(type);
eff_write(buffer, 2, file);
eff_write(type, buffer[1], file);
file->typecount ++;
}
assert (tid == et->id);
/* if (tid >= 128) ... */
buffer[0] = tid;
eff_write(buffer, 1, file);
file->depth++;
}
void eff_writeend(struct effwriter *file) {
unsigned char buffer[1];
buffer[0] = BT_END;
eff_write(buffer, 1, file);
file->depth--;
}
void eff_writeuint32(struct effwriter *file, uint32_t u) {
unsigned char buffer[1 + 4];
u = u32trans(u);
buffer[0] = BT_UINT32;
memcpy(buffer + 1, &u, 4);
eff_write(buffer, 1 + 4, file);
}
void eff_writeuint16(struct effwriter *file, uint16_t u) {
unsigned char buffer[1 + 2];
u = u16trans(u);
buffer[0] = BT_UINT16;
memcpy(buffer + 1, &u, 2);
eff_write(buffer, 1 + 2, file);
}
void eff_writeuint8(struct effwriter *file, uint8_t u) {
unsigned char buffer[1 + 1];
buffer[0] = BT_UINT8;
memcpy(buffer + 1, &u, 1);
eff_write(buffer, 1 + 1, file);
}
void eff_writestring(struct effwriter *file, const char *string, size_t len) {
unsigned char buffer[1 + 1];
if (len >= 256)
fail("Writing strings of length >= 256 not yet supported");
buffer[0] = BT_SHORTSTRING;
buffer[1] = len;
eff_write(buffer, 2, file);
eff_write(string, len, file);
}
void eff_writearray(struct effwriter *file, size_t len, size_t num, const void *data) {
unsigned char buffer[1 + 1 + 2];
uint16_t un;
assert (len < 256UL && num < 63356UL);
un = u16trans((uint16_t)num);
buffer[0] = BT_SHORTARRAY;
buffer[1] = len;
memcpy(buffer + 2, &un, 2);
eff_write(buffer, 4, file);
eff_write(data, len * num, file);
}
void eff_done(struct effwriter *file) {
if (file->depth > 0)
eff_writeend(file);
if (ferror(file->file))
fail("There were errors writing '%s'", file->filename);
if (fclose(file->file) != 0)
fail("Error %d writing '%s': %s", errno, file->filename,
strerror(errno));
while (file->typecount > BT_BLOCKSTART) {
free(file->types[--file->typecount - BT_BLOCKSTART].name);
}
free(file->types);
free(file->filename);
free(file);
}
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