mirror of https://github.com/pygos/pkg-utils.git
75 lines
1.0 KiB
C
75 lines
1.0 KiB
C
#include "pack.h"
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int prefetch_line(input_file_t *f)
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{
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char *line, *ptr;
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ssize_t ret;
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size_t n;
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retry:
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free(f->line);
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f->line = NULL;
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errno = 0;
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line = NULL;
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n = 0;
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ret = getline(&line, &n, f->f);
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if (ret < 0) {
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if (errno != 0) {
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perror(f->filename);
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free(line);
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return -1;
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}
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free(line);
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return 1;
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}
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n = strlen(line);
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while (n >0 && isspace(line[n - 1]))
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--n;
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line[n] = '\0';
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f->line = line;
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f->linenum += 1;
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for (ptr = f->line; isspace(*ptr); ++ptr)
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;
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if (*ptr == '\0' || *ptr == '#')
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goto retry;
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if (ptr != f->line)
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memmove(f->line, ptr, strlen(ptr) + 1);
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ptr = f->line + strlen(f->line);
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while (ptr > f->line && isspace(ptr[-1]))
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--ptr;
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*ptr = '\0';
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if (f->line[0] == '\0')
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goto retry;
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return 0;
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}
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void cleanup_file(input_file_t *f)
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{
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fclose(f->f);
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free(f->line);
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}
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int open_file(input_file_t *f, const char *filename)
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{
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memset(f, 0, sizeof(*f));
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f->filename = filename;
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f->f = fopen(filename, "r");
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if (f->f == NULL) {
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perror(f->filename);
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return -1;
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}
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return 0;
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}
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