schiff_streambuf.h (1995B)
1 /* Copyright (C) 2015-2016 CNRS 2 * 3 * This program is free software: you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation, either version 3 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. */ 15 16 #ifndef SCHIFF_STREAMBUF_H 17 #define SHCIFF_STREAMBUF_H 18 19 #include <rsys/stretchy_array.h> 20 #include <string.h> 21 22 struct schiff_streambuf { char* buf; }; 23 24 res_T 25 schiff_streambuf_init(struct schiff_streambuf* sbuf) 26 { 27 ASSERT(sbuf); 28 memset(sbuf, 0, sizeof(struct schiff_sbuf)); 29 sbuf->buf = sa_add(buf, 128); 30 } 31 32 res_T 33 schiff_streambuf_release(struct schiff_streambuf* sbuf) 34 { 35 ASSERT(sbuf); 36 sa_release(sbuf->buf); 37 } 38 39 res_T 40 schiff_streambuf_read_line 41 (struct schiff_streambuf* sbuf, 42 FILE* stream, 43 char** out_line) 44 { 45 char* line = NULL; 46 size_t last_char; 47 const size_t chunk = 128; 48 res_T res = RES_OK; 49 ASSERT(sbuf && stream && out_line); 50 51 if(!fgets(sbuf->buf, (int)sa_size(sbuf->buf), stream)) { 52 res = RES_EOF; 53 goto exit; 54 } 55 56 while(!strrchr(buf, '\n')) { /* Ensure that the whole line is read */ 57 if(!fgets(sa_add(sbuf->buf, buf_chunk), buf_chunk, stream)) /* EOF */ 58 break; 59 } 60 61 /* Remove leading spaces */ 62 line = sbuf->buf; 63 while((*line == ' ' || *line == '\t') && *line != '\0') ++line; 64 65 /* Remove newline character(s) */ 66 last_char = strlen(line); 67 while(last_char-- && (line[last_char]=='\n' || line[last_char]=='\r')); 68 line[last_char + 1] = '\0'; 69 exit: 70 *out_line = line; 71 return res; 72 error: 73 line = NULL; 74 goto error; 75 } 76 77 #endif /* SCHIFF_STREAMBUF_H */ 78