81 lines
1.4 KiB
C
81 lines
1.4 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <getopt.h>
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#include <err.h>
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#define CHUNK_DEFAULT (0x1000)
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int
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usage(const char* progname)
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{
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fprintf(stderr, "usage: %s [-c chunk] <-s size | -u size | -f size | -d size>\n", progname);
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return 1;
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}
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int
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main(int argc, char** argv)
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{
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int optch;
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int cflag = 0;
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const char* carg = NULL;
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enum { INV = -1, INT, UINT, FLOAT, DOUBLE } tflag = INV;
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const char* sizearg = NULL;
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while ((optch = getopt(argc, argv, "c:s:u:f:d:h")) != -1) {
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switch (optch) {
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case 'c':
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cflag = 1;
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carg = optarg;
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break;
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case 's':
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tflag = INT;
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sizearg = optarg;
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break;
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case 'u':
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tflag = UINT;
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sizearg = optarg;
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break;
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case 'f':
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tflag = FLOAT;
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sizearg = optarg;
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break;
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case 'd':
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tflag = FLOAT;
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sizearg = optarg;
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break;
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case 'h':
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default:
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return usage(*argv);
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}
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}
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if (tflag == INV)
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return usage(*argv);
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const char* fmt = (char*[]){ "%d,", "%u,", "%f,", "%lf," }[tflag];
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size_t membsize = strtoull(sizearg, NULL, 10);
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size_t chunk = cflag? strtoull(carg, NULL, 10) : CHUNK_DEFAULT;
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uint8_t* buffer = aligned_alloc(0x40, chunk * membsize);
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if (buffer == NULL)
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err(1, "malloc()");
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while (!feof(stdin)) {
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size_t i;
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for (i = 0; i < chunk; ++i) {
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if (scanf(fmt, &buffer[i * membsize]) != 1)
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break;
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}
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fwrite(buffer, membsize, i, stdout);
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}
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return 0;
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}
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