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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| /* | ||
| * Copyright (C) 2021 Liquidaty and the zsv/lib contributors | ||
| * All rights reserved | ||
| * | ||
| * This file is part of zsv/lib, distributed under the license defined at | ||
| * https://opensource.org/licenses/MIT | ||
| */ | ||
|
|
||
| #include <stdio.h> | ||
| #include <string.h> | ||
| #include <stdlib.h> | ||
| #include <zsv/utils/writer.h> | ||
|
|
||
| #define ZSV_COMMAND paste | ||
| #include "zsv_command.h" | ||
|
|
||
| static int zsv_paste_usage() { | ||
| static const char *usage = | ||
| "Usage: paste <filename> [<filename> ...]\n" | ||
| "\n" | ||
| "Options:\n" | ||
| " -h, --help : show usage\n"; | ||
| printf("%s\n", usage); | ||
| return 1; | ||
| } | ||
|
|
||
| struct zsv_paste_input_file { | ||
| struct zsv_paste_input_file *next; | ||
| const char *fname; | ||
| struct zsv_opts opts; | ||
| FILE *f; | ||
| unsigned col_count; | ||
| zsv_parser parser; | ||
| enum zsv_status zsv_status; // parser status | ||
| }; | ||
|
|
||
| enum zsv_paste_status { | ||
| zsv_paste_status_ok = 0, | ||
| zsv_paste_status_file, | ||
| zsv_paste_status_memory, | ||
| zsv_paste_status_error | ||
| }; | ||
|
|
||
| // zsv_paste_load_row: return number of inputs that a row was retrieved from | ||
| static int zsv_paste_load_row(struct zsv_paste_input_file *inputs) { | ||
| int have_row = 0; | ||
| for(struct zsv_paste_input_file *pf = inputs; pf; pf = pf->next) { | ||
| if(pf->zsv_status == zsv_status_row) { | ||
| pf->zsv_status = zsv_next_row(pf->parser); | ||
| if(pf->zsv_status == zsv_status_row) | ||
| have_row++; | ||
| } | ||
| } | ||
| return have_row; | ||
| } | ||
|
|
||
| static void zsv_paste_print_row(zsv_csv_writer w, struct zsv_paste_input_file *inputs) { | ||
| char first = 1; | ||
| for(struct zsv_paste_input_file *pf = inputs; pf; pf = pf->next) { | ||
| unsigned int j = zsv_cell_count(pf->parser); | ||
| unsigned int k = pf->col_count; | ||
| for(unsigned int i = 0; i < j && i < k; i++) { | ||
| struct zsv_cell cell = zsv_get_cell(pf->parser, i); | ||
| zsv_writer_cell(w, first, cell.str, cell.len, cell.quoted); | ||
| first = 0; | ||
| } | ||
| for(unsigned int i = j; i < k; i++) | ||
| zsv_writer_cell(w, first, (const unsigned char *)"", 0, 0); | ||
| } | ||
| } | ||
|
|
||
| static void zsv_paste_delete_input(struct zsv_paste_input_file *pf) { | ||
| if(pf->parser) | ||
| zsv_delete(pf->parser); | ||
| if(pf->opts.stream) | ||
| fclose(pf->opts.stream); | ||
| free(pf); | ||
| } | ||
|
|
||
| // zsv_paste_add_input(): return error | ||
| static enum zsv_paste_status zsv_paste_add_input( | ||
| const char *fname, | ||
| struct zsv_paste_input_file **next, | ||
| struct zsv_paste_input_file ***next_next, | ||
| struct zsv_opts *opts, | ||
| const char *opts_used | ||
| ) { | ||
| FILE *f = fopen(fname, "rb"); | ||
| if(!f) { | ||
| perror(fname); | ||
| return zsv_paste_status_file; | ||
| } | ||
| struct zsv_paste_input_file *pf = calloc(1, sizeof(*pf)); | ||
| if(!pf) { | ||
| fclose(f); | ||
| return zsv_paste_status_memory; | ||
| } | ||
|
|
||
| pf->opts = *opts; | ||
| pf->opts.stream = f; | ||
| pf->fname = fname; | ||
| *next = pf; | ||
| *next_next = &pf->next; | ||
|
|
||
| if(zsv_new_with_properties(&pf->opts, fname, opts_used, &pf->parser) != zsv_status_ok) { | ||
| fprintf(stderr, "Unable to initialize parser for %s\n", fname); | ||
| return zsv_paste_status_error; | ||
| } else { | ||
| if((pf->zsv_status = zsv_next_row(pf->parser)) == zsv_status_row) | ||
| pf->col_count = zsv_cell_count(pf->parser); | ||
| else | ||
| fprintf(stderr, "Warning: no data read from %s\n", fname); | ||
| } | ||
| return zsv_paste_status_ok; | ||
| } | ||
|
|
||
| int ZSV_MAIN_FUNC(ZSV_COMMAND)(int argc, const char *argv[], struct zsv_opts *opts, const char *opts_used) { | ||
| struct zsv_paste_input_file *inputs = NULL; | ||
| struct zsv_paste_input_file **next_input = &inputs; | ||
| enum zsv_paste_status status = zsv_paste_status_ok; | ||
|
|
||
| struct zsv_csv_writer_options writer_opts = zsv_writer_get_default_opts(); | ||
| zsv_csv_writer writer = zsv_writer_new(&writer_opts); | ||
| if(!writer) { | ||
| status = zsv_printerr(zsv_paste_status_error, "Unable to create csv writer"); | ||
| goto zsv_paste_done; | ||
| } | ||
|
|
||
| for(int i = 1; status == zsv_paste_status_ok && i < argc; i++) { | ||
| const char *arg = argv[i]; | ||
| if(!strcmp(arg, "-h") || !strcmp(arg, "--help")) { | ||
| zsv_paste_usage(); | ||
| goto zsv_paste_done; | ||
| } | ||
|
|
||
| if(0) { // !strcmp(arg, "-x") || !strcmp(arg, "--my-arg")) { ... | ||
| } else { | ||
| status = zsv_paste_add_input(arg, next_input, &next_input, opts, opts_used); | ||
| } | ||
| } | ||
|
|
||
| if(status == zsv_paste_status_ok) { | ||
| if(!inputs) { | ||
| fprintf(stderr, "Please specify at least one input file\n"); | ||
| status = zsv_paste_status_error; | ||
| goto zsv_paste_done; | ||
| } | ||
|
|
||
| // print headers | ||
| zsv_paste_print_row(writer, inputs); | ||
|
|
||
| // print one row at a time | ||
| while(zsv_paste_load_row(inputs)) | ||
| zsv_paste_print_row(writer, inputs); | ||
| } | ||
|
|
||
| zsv_paste_done: | ||
| for(struct zsv_paste_input_file *next, *pf = inputs; pf; pf = next) { | ||
| next = pf->next; | ||
| zsv_paste_delete_input(pf); | ||
| } | ||
|
|
||
| if(opts->stream && opts->stream != stdin) | ||
| fclose(opts->stream); | ||
|
|
||
| zsv_writer_delete(writer); | ||
| return status; | ||
| } |