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| 1 | /* |
| 2 | * gnuplot.c - Gnuplot file input/output |
| 3 | * |
| 4 | * Written 2010-2011 by Werner Almesberger |
| 5 | * Copyright 2010-2011 Werner Almesberger |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | |
| 14 | #include <stdlib.h> |
| 15 | #include <stdio.h> |
| 16 | #include <string.h> |
| 17 | #include <sys/stat.h> |
| 18 | |
| 19 | #include "util.h" |
| 20 | #include "path.h" |
| 21 | #include "gnuplot.h" |
| 22 | |
| 23 | |
| 24 | struct path *gnuplot_read(const char *name, double r_tool_default) |
| 25 | { |
| 26 | FILE *file; |
| 27 | int lineno = 0; |
| 28 | char buf[1024]; |
| 29 | char *id = NULL, *s; |
| 30 | double x, y, z, tmp; |
| 31 | double r_tool = r_tool_default; |
| 32 | int outside = 0, notch = 0; |
| 33 | int n; |
| 34 | struct path *paths = NULL, *path = NULL; |
| 35 | struct path **lnk = &paths; |
| 36 | |
| 37 | file = name ? fopen(name, "r") : stdin; |
| 38 | if (!file) { |
| 39 | perror(name); |
| 40 | exit(1); |
| 41 | } |
| 42 | |
| 43 | while (fgets(buf, sizeof(buf), file)) { |
| 44 | lineno++; |
| 45 | if (sscanf(buf, "#%%r_tool=%lf\n", &tmp) == 1) |
| 46 | r_tool = tmp; |
| 47 | if (!strcmp(buf, "#%outside\n")) |
| 48 | outside = 1; |
| 49 | if (!strcmp(buf, "#%notch\n")) |
| 50 | notch = 1; |
| 51 | if (!strncmp(buf, "#%id=", 5)) { |
| 52 | free(id); |
| 53 | id = stralloc(buf+5); |
| 54 | s = strchr(id, '\n'); |
| 55 | if (s) |
| 56 | *s = 0; |
| 57 | } |
| 58 | if (*buf == '#') |
| 59 | continue; |
| 60 | n = sscanf(buf, "%lf %lf %lf\n", &x, &y, &z); |
| 61 | switch (n) { |
| 62 | case -1: |
| 63 | path = NULL; |
| 64 | r_tool = r_tool_default; |
| 65 | outside = notch = 0; |
| 66 | continue; |
| 67 | case 2: |
| 68 | z = 0; |
| 69 | /* fall through */ |
| 70 | case 3: |
| 71 | break; |
| 72 | default: |
| 73 | fprintf(stderr, "invalid data at %s line %d\n", |
| 74 | name ? name : "(stdin)", lineno); |
| 75 | exit(1); |
| 76 | } |
| 77 | |
| 78 | if (!path) { |
| 79 | path = path_new(r_tool, id); |
| 80 | path->outside = outside; |
| 81 | path->notch = notch; |
| 82 | *lnk = path; |
| 83 | lnk = &path->next; |
| 84 | } |
| 85 | path_add(path, x, y, z); |
| 86 | } |
| 87 | fclose(file); |
| 88 | return path_connect(paths); |
| 89 | } |
| 90 | |
| 91 | |
| 92 | static int gnuplot_do_write(FILE *file, const struct path *paths) |
| 93 | { |
| 94 | const struct path *path; |
| 95 | const struct point *p; |
| 96 | |
| 97 | for (path = paths; path; path = path->next) { |
| 98 | if (path != paths) |
| 99 | if (fprintf(file, "\n") < 0) |
| 100 | return 0; |
| 101 | if (path->id && |
| 102 | fprintf(file, "#%%id=%s\n", path->id) < 0) |
| 103 | return 0; |
| 104 | if (path->r_tool && |
| 105 | fprintf(file, "#%%r_tool=%f\n", path->r_tool) < 0) |
| 106 | return 0; |
| 107 | if (path->outside && fprintf(file, "#%%outside\n") < 0) |
| 108 | return 0; |
| 109 | if (path->notch && fprintf(file, "#%%notch\n") < 0) |
| 110 | return 0; |
| 111 | for (p = path->first; p; p = p->next) |
| 112 | if (fprintf(file, "%f %f %f\n", p->x, p->y, p->z) < 0) |
| 113 | return 0; |
| 114 | } |
| 115 | if (file == stdout) { |
| 116 | if (fflush(file) == EOF) |
| 117 | return 0; |
| 118 | } else { |
| 119 | if (fclose(file) < 0) |
| 120 | return 0; |
| 121 | } |
| 122 | return 1; |
| 123 | } |
| 124 | |
| 125 | |
| 126 | void gnuplot_write(const char *name, const struct path *paths) |
| 127 | { |
| 128 | FILE *file; |
| 129 | |
| 130 | file = name ? fopen(name, "w") : stdout; |
| 131 | if (!file) { |
| 132 | perror(name); |
| 133 | exit(1); |
| 134 | } |
| 135 | if (!gnuplot_do_write(file, paths)) { |
| 136 | perror(name ? name : "(stdout)"); |
| 137 | exit(1); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | |
| 142 | void gnuplot_append(const char *name, const struct path *paths) |
| 143 | { |
| 144 | FILE *file; |
| 145 | struct stat st; |
| 146 | |
| 147 | if (!name) { |
| 148 | printf("\n"); |
| 149 | gnuplot_write(NULL, paths); |
| 150 | return; |
| 151 | } |
| 152 | file = fopen(name, "a"); |
| 153 | if (!file) { |
| 154 | perror(name); |
| 155 | exit(1); |
| 156 | } |
| 157 | if (stat(name, &st) < 0) { |
| 158 | perror("lstat"); |
| 159 | exit(1); |
| 160 | } |
| 161 | if (!S_ISREG(st.st_mode) || st.st_size) |
| 162 | fprintf(file, "\n"); |
| 163 | if (!gnuplot_do_write(file, paths)) { |
| 164 | perror(name); |
| 165 | exit(1); |
| 166 | } |
| 167 | } |
| 168 |
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