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a47cfa475700469d0ea0e7a7c80c5fef8690ac3f
stedolan-jq/main.c
Stephen Dolan a47cfa4757 Delete unnecessary _POSIX_SOURCE. Closes #89
2013-05-13 16:41:11 +01:00

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#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include "compile.h"
#include "jv.h"
#include "jv_parse.h"
#include "execute.h"
#include "config.h" /* Autoconf generated header file */
#include "jv_alloc.h"
int jq_testsuite(int argc, char* argv[]);
static const char* progname;
static void usage() {
fprintf(stderr, "\njq - commandline JSON processor [version %s]\n", PACKAGE_VERSION);
fprintf(stderr, "Usage: %s [options] <jq filter> [file...]\n\n", progname);
fprintf(stderr, "For a description of the command line options and\n");
fprintf(stderr, "how to write jq filters (and why you might want to)\n");
fprintf(stderr, "see the jq manpage, or the online documentation at\n");
fprintf(stderr, "http://stedolan.github.com/jq\n\n");
exit(1);
}
static void die() {
fprintf(stderr, "Use %s --help for help with command-line options,\n", progname);
fprintf(stderr, "or see the jq documentation at http://stedolan.github.com/jq\n");
exit(1);
}
static int isoptish(const char* text) {
return text[0] == '-' && (text[1] == '-' || isalpha(text[1]));
}
static int isoption(const char* text, char shortopt, const char* longopt) {
if (text[0] != '-') return 0;
if (strlen(text) == 2 && text[1] == shortopt) return 1;
if (text[1] == '-' && !strcmp(text+2, longopt)) return 1;
return 0;
}
enum {
SLURP = 1,
RAW_INPUT = 2,
PROVIDE_NULL = 4,
RAW_OUTPUT = 8,
COMPACT_OUTPUT = 16,
ASCII_OUTPUT = 32,
COLOUR_OUTPUT = 64,
NO_COLOUR_OUTPUT = 128,
FROM_FILE = 256,
/* debugging only */
DUMP_DISASM = 2048,
};
static int options = 0;
static struct bytecode* bc;
static void process(jv value, int flags) {
jq_state *jq = NULL;
jq_init(bc, value, &jq, flags);
jv result;
while (jv_is_valid(result = jq_next(jq))) {
if ((options & RAW_OUTPUT) && jv_get_kind(result) == JV_KIND_STRING) {
fwrite(jv_string_value(result), 1, jv_string_length(jv_copy(result)), stdout);
jv_free(result);
} else {
int dumpopts;
/* Disable colour by default on Windows builds as Windows
terminals tend not to display it correctly */
#ifdef WIN32
dumpopts = 0;
#else
dumpopts = isatty(fileno(stdout)) ? JV_PRINT_COLOUR : 0;
#endif
if (!(options & COMPACT_OUTPUT)) dumpopts |= JV_PRINT_PRETTY;
if (options & ASCII_OUTPUT) dumpopts |= JV_PRINT_ASCII;
if (options & COLOUR_OUTPUT) dumpopts |= JV_PRINT_COLOUR;
if (options & NO_COLOUR_OUTPUT) dumpopts &= ~JV_PRINT_COLOUR;
jv_dump(result, dumpopts);
}
printf("\n");
}
jv_free(result);
jq_teardown(&jq);
}
static jv slurp_file(const char* filename) {
FILE* file = fopen(filename, "r");
if (!file) {
return jv_invalid_with_msg(jv_string_fmt("Could not open %s: %s",
filename,
strerror(errno)));
}
jv data = jv_string("");
while (!feof(file) && !ferror(file)) {
char buf[4096];
size_t n = fread(buf, 1, sizeof(buf), file);
data = jv_string_concat(data, jv_string_sized(buf, (int)n));
}
int badread = ferror(file);
fclose(file);
if (badread) {
jv_free(data);
return jv_invalid_with_msg(jv_string_fmt("Error reading from %s",
filename));
}
return data;
}
FILE* current_input;
const char** input_filenames;
int ninput_files;
int next_input_idx;
static int read_more(char* buf, size_t size) {
while (!current_input || feof(current_input)) {
if (current_input) {
fclose(current_input);
current_input = 0;
}
if (next_input_idx == ninput_files) {
return 0;
}
if (!strcmp(input_filenames[next_input_idx], "-")) {
current_input = stdin;
} else {
current_input = fopen(input_filenames[next_input_idx], "r");
}
if (!current_input) {
fprintf(stderr, "%s: %s: %s\n", progname, input_filenames[next_input_idx], strerror(errno));
}
next_input_idx++;
}
if (!fgets(buf, size, current_input)) buf[0] = 0;
return 1;
}
int main(int argc, char* argv[]) {
int ret = 0;
if (argc) progname = argv[0];
if (argc > 1 && !strcmp(argv[1], "--run-tests")) {
return jq_testsuite(argc - 1, argv + 1);
}
const char* program = 0;
input_filenames = jv_mem_alloc(sizeof(const char*) * argc);
ninput_files = 0;
int further_args_are_files = 0;
int jq_flags = 0;
jv program_arguments = jv_array();
for (int i=1; i<argc; i++) {
if (further_args_are_files) {
input_filenames[ninput_files++] = argv[i];
} else if (!strcmp(argv[i], "--")) {
if (!program) usage();
further_args_are_files = 1;
} else if (!isoptish(argv[i])) {
if (program) {
input_filenames[ninput_files++] = argv[i];
} else {
program = argv[i];
}
} else if (isoption(argv[i], 's', "slurp")) {
options |= SLURP;
} else if (isoption(argv[i], 'r', "raw-output")) {
options |= RAW_OUTPUT;
} else if (isoption(argv[i], 'c', "compact-output")) {
options |= COMPACT_OUTPUT;
} else if (isoption(argv[i], 'C', "color-output")) {
options |= COLOUR_OUTPUT;
} else if (isoption(argv[i], 'M', "monochrome-output")) {
options |= NO_COLOUR_OUTPUT;
} else if (isoption(argv[i], 'a', "ascii-output")) {
options |= ASCII_OUTPUT;
} else if (isoption(argv[i], 'R', "raw-input")) {
options |= RAW_INPUT;
} else if (isoption(argv[i], 'n', "null-input")) {
options |= PROVIDE_NULL;
} else if (isoption(argv[i], 'f', "from-file")) {
options |= FROM_FILE;
} else if (isoption(argv[i], 0, "arg")) {
if (i >= argc - 2) {
fprintf(stderr, "%s: --arg takes two parameters (e.g. -a varname value)\n", progname);
die();
}
jv arg = jv_object();
arg = jv_object_set(arg, jv_string("name"), jv_string(argv[i+1]));
arg = jv_object_set(arg, jv_string("value"), jv_string(argv[i+2]));
program_arguments = jv_array_append(program_arguments, arg);
i += 2; // skip the next two arguments
} else if (isoption(argv[i], 0, "debug-dump-disasm")) {
options |= DUMP_DISASM;
} else if (isoption(argv[i], 0, "debug-trace")) {
jq_flags |= JQ_DEBUG_TRACE;
} else if (isoption(argv[i], 'h', "help")) {
usage();
} else if (isoption(argv[i], 'V', "version")) {
fprintf(stderr, "jq version %s\n", PACKAGE_VERSION);
return 0;
} else {
fprintf(stderr, "%s: Unknown option %s\n", progname, argv[i]);
die();
}
}
if (!program) usage();
if (ninput_files == 0) current_input = stdin;
if ((options & PROVIDE_NULL) && (options & (RAW_INPUT | SLURP))) {
fprintf(stderr, "%s: --null-input cannot be used with --raw-input or --slurp\n", progname);
die();
}
if (options & FROM_FILE) {
jv data = slurp_file(program);
if (!jv_is_valid(data)) {
data = jv_invalid_get_msg(data);
fprintf(stderr, "%s: %s\n", progname, jv_string_value(data));
jv_free(data);
return 1;
}
bc = jq_compile_args(jv_string_value(data), program_arguments);
jv_free(data);
} else {
bc = jq_compile_args(program, program_arguments);
}
if (!bc) return 1;
if (options & DUMP_DISASM) {
dump_disassembly(0, bc);
printf("\n");
}
if (options & PROVIDE_NULL) {
process(jv_null(), jq_flags);
} else {
jv slurped;
if (options & SLURP) {
if (options & RAW_INPUT) {
slurped = jv_string("");
} else {
slurped = jv_array();
}
}
struct jv_parser parser;
jv_parser_init(&parser);
char buf[4096];
while (read_more(buf, sizeof(buf))) {
if (options & RAW_INPUT) {
int len = strlen(buf);
if (len > 0) {
if (options & SLURP) {
slurped = jv_string_concat(slurped, jv_string(buf));
} else {
if (buf[len-1] == '\n') buf[len-1] = 0;
process(jv_string(buf), jq_flags);
}
}
} else {
jv_parser_set_buf(&parser, buf, strlen(buf), !feof(stdin));
jv value;
while (jv_is_valid((value = jv_parser_next(&parser)))) {
if (options & SLURP) {
slurped = jv_array_append(slurped, value);
} else {
process(value, jq_flags);
}
}
if (jv_invalid_has_msg(jv_copy(value))) {
jv msg = jv_invalid_get_msg(value);
fprintf(stderr, "parse error: %s\n", jv_string_value(msg));
jv_free(msg);
ret = 1;
break;
} else {
jv_free(value);
}
}
}
jv_parser_free(&parser);
if (ret != 0)
goto out;
if (options & SLURP) {
process(slurped, jq_flags);
}
}
out:
jv_mem_free(input_filenames);
bytecode_free(bc);
return ret;
}
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