diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/catcho.c | 204 | ||||
| -rw-r--r-- | tools/genhex.cpp | 33 | ||||
| -rw-r--r-- | tools/hexbin.c | 24 |
3 files changed, 261 insertions, 0 deletions
diff --git a/tools/catcho.c b/tools/catcho.c new file mode 100644 index 0000000..3426e50 --- /dev/null +++ b/tools/catcho.c @@ -0,0 +1,204 @@ +/* + * catcho - outputing text to the standard output + * + * Usage + * ----- + * catcho [options] + * + * Options + * ------- + * -m --mode MODE Set the initial text mode (Default: passthrough) + * -v --version Display program information and exit + * -V --verbose Duplicate stdout on stderr + * + * Modes + * ----- + * passthru / passthrough / normal / n - Input is copied to output verbatim. + * null / z - Input is dropped. + * hb - Input (interpreted as hex) is compressed to bytes on the output. + * bh - The opposite of hb. + * ib - Input (interpreted as bit-bytes) is compressed to bytes on the output. + * bi - The opposite of ib. + * + * Append 'f' to any mode (eg: bhf): Input is interpreted as '\n'-delimited + * filenames. File contents are filtered based on mode and sent to output. + * + * Switching modes + * --------------- + * When catcho receives signal SIGINT (ctrl-C from the terminal, for example), + * any pending input/output is flushed and catcho then interprets the input + * as a mode name terminated by a '\n'. Once the input provides a string\n, + * it switches the desired mode and input processing resumes. + * + * Exiting catcho + * -------------- + * Since SIGINT is used for mode switching, the 'normal' way to terminate + * catcho is by sending it an End-Of-File byte on its input. (ctrl-D on your + * terminal) + */ + +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <getopt.h> +#include <signal.h> + +#define LAST_STR_CHAR(s) (s[strlen(s)-1]) + +/* modes */ +enum mode +{ + N, + Z, + HB, + BH, + IB, + BI +}; + +/* global state */ +static enum mode current_mode = N; +static int current_mode_f = 0; +static int current_verbose = 0; + +static size_t ccfwrite(const void *ptr, size_t size, size_t nmemb) +{ + size_t ret; + ret = fwrite(ptr, size, nmemb, stdout); + + if (current_verbose) + fwrite(ptr, size, nmemb, stderr); + + return ret; +} + +static void sigint(int sig) +{ + (void)sig; + ccfwrite("in signal handler\n", 18, 1); +} + +static int set_mode(const char *mode) +{ + if (!mode) + return 0; + + if (!strcmp(mode, "passthru") || // these don't support 'f' suffix + !strcmp(mode, "passthrough") || + !strcmp(mode, "normal")) + { + current_mode = N; + current_mode_f = 0; + } + else if (!strcmp(mode, "null")) // this doesn't support 'f' suffix + { + current_mode = Z; + current_mode_f = 0; + } + else if (!strncmp(mode, "n", 1)) + { + current_mode = N; + current_mode_f = (LAST_STR_CHAR(mode) == 'f'); + } + else if (!strncmp(mode, "z", 1)) + { + current_mode = Z; + current_mode_f = (LAST_STR_CHAR(mode) == 'f'); + } + else if (!strncmp(mode, "hb", 2)) + { + current_mode = HB; + current_mode_f = (LAST_STR_CHAR(mode) == 'f'); + } + else if (!strncmp(mode, "bh", 2)) + { + current_mode = BH; + current_mode_f = (LAST_STR_CHAR(mode) == 'f'); + } + else if (!strncmp(mode, "ib", 2)) + { + current_mode = IB; + current_mode_f = (LAST_STR_CHAR(mode) == 'f'); + } + else if (!strncmp(mode, "bi", 2)) + { + current_mode = BI; + current_mode_f = (LAST_STR_CHAR(mode) == 'f'); + } + else + { + fprintf(stderr, "Mode string '%s' not recognized\n", mode); + return 0; + } + + return 1; +} + +void show_version(const char *name) +{ + printf("%s version 1.0\n", name); +} + +int main(int argc, char **argv) +{ + /* + * handling command-line arguments: + * i'm going to leave opterr alone (defaults to non-zero) + * \this causes getopt to print its own error messages to + * stderr if things go wrong, which is fine. + */ + + const char *shortopts = "m:vV"; + + const struct option longopts[] = { + { "mode", required_argument, NULL, 'm' }, + { "version", no_argument, NULL, 'v' }, + { "verbose", no_argument, NULL, 'V' }, + { NULL, 0, NULL, 0 } + }; + + int opt; + + while ((opt = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) + { + switch (opt) + { + case '?': + return 1; + + case 'm': + if (!set_mode(optarg)) + return 1; + break; + + case 'v': + show_version(argv[0]); + return 0; + + case 'V': + current_verbose = 1; + break; + } + } + + /* setup signals (mode switch) */ + signal(SIGINT, &sigint); + + + char memes[4]; + fread(memes, 4, 1, stdin); + switch (current_mode) + { + case N: printf("NORMAL\n"); break; + case Z: printf("NULL\n"); break; + case HB: printf("hex to bytes\n"); break; + case BH: printf("bytes to hex\n"); break; + case IB: printf("bits to bytes\n"); break; + case BI: printf("bytes to bits\n"); break; + } + + printf("file mode: %i\n", current_mode_f); + printf("verbose mode: %i\n", current_verbose); + + return 0; +} diff --git a/tools/genhex.cpp b/tools/genhex.cpp new file mode 100644 index 0000000..a37f91e --- /dev/null +++ b/tools/genhex.cpp @@ -0,0 +1,33 @@ +#include <iostream> +#include <string> + +/* + * Read in all of stdin (should be piped from objdump), look for bytecode hex, + * and print this code, escaped in a C-string literal, to stdout. + * + * EG output: "\x01\x02\x03\x04" + */ + +int main() +{ + std::string tmp; + unsigned int hex; + + std::cout << "\""; + + while (true) + { + std::cin >> tmp; + + if (std::cin.eof()) + break; + + if (tmp.size() == 2 && + tmp.find(":") == std::string::npos && + sscanf(tmp.c_str(), "%x", &hex) > 0) + std::cout << "\\x" << tmp; + } + + std::cout << "\"\n"; + return 0; +} diff --git a/tools/hexbin.c b/tools/hexbin.c new file mode 100644 index 0000000..9356fff --- /dev/null +++ b/tools/hexbin.c @@ -0,0 +1,24 @@ +/* + * hexbin.c + * + * This program takes no arguments, it simply interprets its input as hex + * and outputs bytes. + */ + +#include <stdio.h> +#include <stdint.h> + +int main() +{ + uint8_t b; + + while (1) + { + scanf("%hhx", &b); + if (feof(stdin)) + break; + fwrite(&b, 1, 1, stdout); + } + + return 0; +} |